Microwave heating method and microwave equipment

Abstract

The embodiment of the invention provides a microwave heating method and microwave equipment, and the method comprises the steps: controlling a radiation assembly of the microwave equipment to carry out the circulating frequency sweeping radiation of a target object within a preset recognition time range according to a preset recognition frequency range; collecting identification absorption power of the target object under each frequency in a preset identification frequency range in each identification processing period; determining a target identification frequency corresponding to the target object in each identification processing period from a preset identification frequency range according to the identification absorption power; and determining the object type of the target object based on the change degree of the target identification frequency in each identification processing period in the preset identification time range, carrying out microwave heating on the target object according to the object type, and controlling the radiation assembly to stop microwave heating until the heating stopping requirement of the object type corresponding to the target object is met. According to the method, the article types can be identified, the microwave heating mode is adjusted accordingly, the heating efficiency and accuracy can be remarkably improved, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of intelligent control technology, and particularly to a microwave heating method and a microwave device. Background Art

[0002] Microwave heating refers to a heating method in which microwaves are emitted to food, enabling the food to absorb the energy of the microwaves and convert it into heat energy, thereby causing the overall temperature of the food to rise. It has the characteristics of efficient, fast, and uniform heating. With the accelerating pace of people's lives, microwave heating cooking devices are increasingly favored by consumers.

[0003] Common microwave heating cooking devices use magnetrons to heat the food in the cavity. People can only achieve different degrees of heating of the food by adjusting the heating duration. However, only adjusting the heating duration cannot achieve precise heating of different types of food ingredients, which will seriously affect the user experience. Summary of the Invention

[0004] Embodiments of this application provide a microwave heating method and a microwave device to achieve the effect of precisely heating food.

[0005] In a first aspect, embodiments of this application provide a microwave heating method, including:

[0006] Controlling a radiation component of the microwave device to perform cyclic frequency-sweeping radiation on a target object within a preset recognition time range according to a preset recognition frequency range; when the process of the frequency-sweeping radiation covers the entire preset recognition frequency range, an identification processing cycle is formed, and the preset recognition time range includes two or more identification processing cycles;

[0007] Collecting the recognition absorption power of the target object at each frequency within the preset recognition frequency range in each recognition processing cycle;

[0008] Determining, according to the recognition absorption power, a target recognition frequency corresponding to the target object in each recognition processing cycle from the preset recognition frequency range;

[0009] Based on the degree of change of the target recognition frequencies in each recognition processing cycle within the preset recognition time range, determining the item type of the target object, and performing microwave heating on the target object according to the item type until the stop heating requirement corresponding to the item type of the target object is met, and controlling the radiation component to stop microwave heating.

[0010] In a possible implementation manner, the determining the item type of the target object based on the degree of change of the target recognition frequencies in each recognition processing cycle within the preset recognition time range includes:

[0011] When the degree of change of the target recognition frequency within a preset recognition time range reaches a frequency change threshold, determine that the item type of the target object is the first type;

[0012] When the degree of change of the target recognition frequency within a preset recognition time range does not reach the frequency change threshold, determine that the item type of the target object is the second type.

[0013] In a possible implementation manner, the microwave heating of the target object according to the item type includes:

[0014] According to a preset heating frequency range, control the radiation component to perform frequency-sweeping radiation on the target object with a first heating radiation power; when the process of the frequency-sweeping radiation covers the entire preset heating frequency range, a first heating treatment cycle is formed;

[0015] After completing the first heating treatment cycle, collect the first heating absorption power of the target object at each frequency within the preset heating frequency range;

[0016] According to the first heating absorption power, adjust the radiation power corresponding to at least some frequencies within the preset heating frequency range;

[0017] Based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, repeat the frequency-sweeping radiation to heat the target object.

[0018] In a possible implementation manner, the adjusting the first heating radiation power corresponding to at least some frequencies within the preset heating frequency range according to the first heating absorption power includes:

[0019] Based on the first heating absorption power of the target object at each frequency within the preset heating frequency range, screen out target heating frequencies from each frequency within the preset heating frequency range;

[0020] Replace the radiation power of the target heating frequency from the first heating radiation power with a second heating radiation power;

[0021] The second heating radiation power is greater than the first heating radiation power.

[0022] In a possible implementation manner, the target heating frequencies include a first target heating frequency and a second target heating frequency;

[0023] The screening out target heating frequencies from each frequency within the preset heating frequency range based on the first heating absorption power of the target object at each frequency within the preset heating frequency range includes:

[0024] Based on the first heating absorption power of the target object at each frequency within a preset heating frequency range, the maximum heating absorption power is screened out;

[0025] Based on the maximum heating absorption power and a first preset ratio, a first critical value is determined, and the frequency corresponding to the first heating absorption power higher than the first critical value is used as the first target heating frequency;

[0026] When the proportion of the target heating frequency in all frequencies within the preset heating frequency range is lower than a preset lower limit value, based on the maximum heating absorption power and a second preset ratio, a second critical value is determined, and the frequency corresponding to the first heating absorption power higher than the second critical value but lower than the first critical value is used as the second target heating frequency;

[0027] Adjusting the radiation power corresponding to at least some frequencies within the preset heating frequency range according to the first heating absorption power includes:

[0028] Replacing the radiation power of the first target heating frequency from the first heating radiation power with a second heating radiation power, and replacing the radiation power of the second target heating frequency from the first heating radiation power with a third heating radiation power; the third heating radiation power is greater than the first heating radiation power but less than the second heating radiation power.

[0029] In a possible implementation manner, determining the item type of the target object based on the change degree of the target recognition frequency within a preset recognition time range in each of the recognition processing cycles includes:

[0030] When the change degree of the target recognition frequency within the preset recognition time range reaches a frequency change threshold, determining that the item type of the target object is the first type;

[0031] When the change degree of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, determining that the item type of the target object is the second type;

[0032] Repeating the swept-frequency radiation based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies to heat the target object includes:

[0033] When the item type of the target object is the second type, performing repeated swept-frequency radiation based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, and when the process of the swept-frequency radiation covers the entire preset heating frequency range, a second heating processing cycle is formed;

[0034] Collect the second heating absorption power of the target object at each frequency within the preset heating frequency range in each of the second heating treatment cycles;

[0035] When the change rate of the second heating absorption power of the target object reaches the first absorption power change threshold within any two adjacent second heating treatment cycles, repeat the following process:

[0036] According to the preset heating frequency range, control the radiation component to perform frequency-sweeping radiation on the target object with the first heating radiation power;

[0037] After completing the first heating treatment cycle, collect the first heating absorption power of the target object at each frequency within the preset heating frequency range;

[0038] Adjust the radiation power corresponding to at least some frequencies within the preset heating frequency range according to the first heating absorption power;

[0039] Based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, repeat the frequency-sweeping radiation to heat the target object;

[0040] When the change rate of the second heating absorption power of the target object is less than the first absorption power change threshold within any two adjacent second heating treatment cycles, determine that the stop heating requirement is met and stop heating the target object.

[0041] In a possible implementation manner, determining the item type of the target object based on the change degree of the target recognition frequency within the preset recognition time range in each of the recognition processing cycles includes:

[0042] When the change degree of the target recognition frequency within the preset recognition time range reaches the frequency change threshold, determine that the item type of the target object is the first type;

[0043] When the change degree of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, determine that the item type of the target object is the second type;

[0044] The steps of determining that the stop heating requirement is met include:

[0045] When the item type of the target object is the first type, after a preset heating time, collect the actual temperature value corresponding to the target object, and when the actual temperature value reaches the preset temperature threshold, determine that the stop heating requirement is met.

[0046] In a possible implementation, the microwave device includes two or more radiation components;

[0047] Performing microwave heating on the target object according to the item type includes:

[0048] Controlling the first radiation component to perform frequency-sweeping radiation on the target object at a first heating radiation power according to the arranged order of each radiation component set in advance and the preset heating frequency range; when the process of the frequency-sweeping radiation covers the entire preset heating frequency range, a first heating treatment cycle is formed;

[0049] According to the arranged order, when the previous radiation component completes half of the first heating treatment cycle, controlling the subsequent radiation component to perform frequency-sweeping radiation on the target object at the first heating radiation power according to the preset heating frequency range;

[0050] For any one of the radiation components, after completing the first heating treatment cycle, collecting the first heating absorption power of the target object at each frequency within the preset heating frequency range;

[0051] Adjusting the radiation power corresponding to at least some frequencies within the preset heating frequency range according to the first heating absorption power;

[0052] Based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, repeatedly performing frequency-sweeping radiation to heat the target object.

[0053] In a possible implementation, the microwave device includes two or more radiation components;

[0054] Determining the item type of the target object based on the degree of change of the target recognition frequency within the preset recognition time range in each recognition processing cycle includes:

[0055] When the degree of change of the target recognition frequency within the preset recognition time range reaches the frequency change threshold, determining that the item type of the target object is the first type;

[0056] When the degree of change of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, determining that the item type of the target object is the second type;

[0057] After performing microwave heating on the target object according to the item type, it includes:

[0058] After a preset heating time, dividing the target object into multiple regions evenly according to the number of radiation components;

[0059] Detect the temperature values of each area of the target object. When the average temperature value of each area of the target object is lower than the preset temperature threshold, screen out the low-temperature areas based on the temperature values of each area, and increase the radiation power of the radiation components corresponding to the low-temperature areas;

[0060] At intervals of the preset heating time, repeatedly detect the temperature values of each area of the target object. If the difference between the corresponding temperature values of any two areas is less than the lower temperature limit value, restore the radiation power of the radiation components corresponding to the low-temperature areas;

[0061] When the average temperature value of each area of the target object is not lower than the preset temperature threshold, it is determined that the stop heating requirement is met.

[0062] In a second aspect, an embodiment of the present application provides a microwave device, including a housing, a microwave control device and a solid-state source arranged on the housing, and two or more radiation components, an image acquisition device and a thermal imaging device arranged in the inner cavity of the housing;

[0063] The microwave control device is respectively connected to the solid-state source, the radiation components and the image acquisition device;

[0064] The solid-state source is connected to the radiation components:

[0065] The microwave control device is used to determine the item type of the target object and obtain the radiation power corresponding to each frequency within the preset identification frequency range of each radiation component by using the microwave control method in the first aspect and various possible aspects of the first aspect;

[0066] The solid-state source is used to generate corresponding microwaves based on the radiation power corresponding to each frequency within the preset identification frequency range of each radiation component;

[0067] The radiation components are used to radiate the microwaves to the target object to perform microwave heating on the target object placed in the cavity;

[0068] The thermal imaging device is used to collect the temperature values corresponding to the target object.

[0069] The microwave heating method and the microwave device provided by the embodiments of the present application can directly distinguish the item types of the target object by detecting the absorption power of the target object and based on the change speed of the power absorbed by the target object, and accordingly adjust the microwave heating method, which can significantly improve the heating efficiency and accuracy and enhance the user experience. Description of the Drawings

[0070] The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments in line with the present application, and are used together with the specification to explain the principles of the present application.

[0071] Figure 1 Schematic rear view structure diagram of the microwave device provided by this application;

[0072] Figure 2 Schematic structure diagram of the internal cavity of the microwave device provided by this application;

[0073] Figure 3 Schematic flow diagram of the microwave control method provided by this application;

[0074] Figure 4 Schematic structure diagram of the microwave device provided by this application;

[0075] Figure 5 Schematic structure diagram of the electronic device provided by this application.

[0076] Through the above-mentioned drawings, specific embodiments of this application have been shown, and there will be more detailed descriptions hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0077] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the drawings in the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art under the inspiration of this embodiment belong to the scope of protection of this application.

[0078] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims, and above-mentioned drawings of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such used data may be interchanged under appropriate circumstances so that the embodiments of this application described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0079] Such as Figure 1 、 2As shown in the figure, an embodiment of the present application provides a microwave device 100, which includes a housing 110, a microwave control device 120 and a solid-state source 130 disposed on the housing 110, and at least one radiation component 140 disposed in the internal cavity of the housing 110.

[0080] Among them, the microwave control device 120 is respectively connected to the solid-state source 130 and at least one radiation component 140; the solid-state source 130 is connected to at least one radiation component 140.

[0081] The microwave control device 120 is configured to determine the radiation power corresponding to each frequency in a preset identification frequency range, and generate a microwave generation instruction based on the radiation power corresponding to each frequency, and send the instruction to the solid-state source 130 and the radiation component 140. The solid-state source 130 is configured to generate corresponding microwaves according to the radiation power corresponding to each frequency carried in the microwave generation instruction when receiving the microwave generation instruction; and stop generating microwaves when receiving a stop generation instruction sent by the microwave control device 120. The radiation component 140 is configured to perform frequency modulation and phase modulation on the microwaves generated by the solid-state source 130 according to the radiation power corresponding to each frequency carried in the microwave generation instruction, and radiate the frequency-modulated and phase-modulated microwaves into the internal cavity of the housing 110 to perform microwave heating on the target object placed in the internal cavity; and collect the absorption power of the target object for the microwaves emitted by the radiation component 140, and send the absorption power to the microwave control device 120, so that the microwave control device 120 adjusts the radiation power corresponding to each frequency according to the absorption power.

[0082] The target object may be food to be heated placed by the user in the internal cavity.

[0083] It should be noted that the microwave device 100 may be a kitchen device that heats food by means of microwave heating, such as a microwave oven, a microwave grill combination oven, a microwave steam grill combination oven, etc.

[0084] The housing 110 is provided with an opening, and a door is disposed on the opening; the housing 110 can be connected to one side of the door through a hinge structure, so that the door can rotate freely within a certain angle, and the housing 110 can use a door lock device to realize the opening and closing connection with the other side of the door. When the housing 110 is connected to the other side of the door, the opening on the housing 110 is closed, and the internal cavity of the housing 110 forms a sealed space. When the housing 110 is not connected to the other side of the door, the opening on the housing 110 is open, and the user can place or take out food in the internal cavity of the housing 110 through the open opening.

[0085] Such as Figure 1As shown, the microwave control device 120 and the solid-state source 130 can be adjacently arranged on the first end face of the housing 110, and the first end face is disposed opposite to the opening on the housing 110. Specifically, the microwave control device 120 and the solid-state source 130 can be arranged on the outer surface of the first end face, and the microwave control device 120 and the solid-state source 130 can be pre-integrated in the same box body.

[0086] As Figure 2 shown, two or more radiation components 140 can be arranged on the second end face of the housing 110. The second end face can refer to the upper end face of the housing 110 in the height direction. Specifically, the radiation component 140 can be arranged on the inner surface of the second end face. As an example, the radiation component 140 can be an antenna transmitter.

[0087] As an example, the microwave device 100 is further provided with a coaxial cable 150. As Figure 1 shown, a through hole 111 can be formed on the first end face. One end of the coaxial cable 150 is connected to the radiation component 140 arranged on the second end face, and the other end of the coaxial cable 150 passes through the through hole 111 and is connected to the solid-state source 130 arranged on the outer surface of the first end face, so as to realize the connection between the radiation component 140 and the solid-state source 130. The coaxial cable 150 is used to transmit the microwave generated at the solid-state source 130 to the radiation component 140.

[0088] As Figure 2 shown, in an embodiment, the microwave device 100 is further provided with a thermal imaging device 160. The thermal imaging device 160 is also arranged on the inner surface of the second end face and faces the lower end face of the housing 110 in the height direction. The thermal imaging device 160 is connected to the microwave control device 120 and is used for indirectly measuring the temperature on the surface of the target object by detecting the amount of infrared radiation radiated from the surface of the target object according to the temperature field recognition instruction issued by the microwave control device 120, so as to perform non-contact temperature measurement on the target object and obtain the temperature distribution on the surface of the target object. When food A is placed in the inner cavity of the housing 110, the thermal imaging device 160 can collect the infrared radiation emitted from the surface of food A. Subsequently, the thermal imaging device 160 can convert the received infrared radiation into an electrical signal, perform circuit processing on it, and then send the processed digital signal to the microwave control device 120, so that the microwave control device 120 converts the digital signal into a visualized thermal image and obtains several temperature values included in the thermal image. As an example, the thermal imaging device 160 refers to a device that can obtain the temperature distribution on the surface of an object through non-contact temperature measurement.

[0089] In one embodiment, the microwave device 100 may further be provided with a timing device. For example, the timing device may be disposed on the outer surface of the first end face and connected to the microwave control device 120. The timing device can start timing when receiving a timing instruction issued by the microwave control device 120, stop timing when the timing reaches the target duration corresponding to the timing instruction, and generate a stop instruction to be sent to the microwave control device 120. After receiving the stop instruction, the microwave control device 120 can generate a stop generation instruction and send it to the solid state source 130 to control the solid state source 130 to stop generating microwaves. The timing of the timing device can be used to indicate the duration of the continuous generation of microwaves by the solid state source 130, or can be used to indicate the duration of microwave radiation by the radiation component 140.

[0090] In one embodiment, the microwave device 100 may further be provided with a weighing device. For example, the weighing device may be disposed on the third end face. The third end face may refer to the lower end face of the housing 110 in the height direction, and the third end face is disposed opposite to the second end face. The weighing device is connected to the microwave control device 120. In this embodiment, the food to be heated can be placed on the weighing device. The weighing device is used to weigh the food to be heated carried thereon to obtain the corresponding weight parameter. Subsequently, the weighing device can send the weight parameter to the microwave control device 120. When the weight parameter reaches the preset weight threshold, the microwave control device 120 can control the radiation component 140 to perform microwave heating on the target object.

[0091] In one embodiment, a microwave heating method is provided. In this embodiment, an example is given in which the microwave heating method is applied to the microwave control device in the above microwave device, as Figure 3 shown, the microwave control method includes:

[0092] Step 302, controlling the radiation component of the microwave device to perform cyclic frequency sweep radiation on the target object within a preset identification time range according to a preset identification frequency range; when the process of the frequency sweep radiation covers the entire preset identification frequency range, an identification processing cycle is formed, and the preset identification time range includes two or more identification processing cycles.

[0093] As an example, if there are two or more radiation components in the microwave device, the microwave control device can pre-designate the radiation component of one channel to perform cyclic frequency sweep radiation on the target object within a preset identification time range according to a preset identification frequency range.

[0094] The identification processing cycle refers to the time used for the radiation component to radiate the target object according to each frequency within the preset identification frequency range and the corresponding frequency sweep radiation power for each frequency.

[0095] As an example, the preset identification frequency range may be F 1 -F2 The microwave control device can use the preset swept-frequency radiation power as the preset identification frequency range F 1 -F 2 The radiation power corresponding to each frequency within, and within the preset identification time range of 1 min, based on the preset identification frequency range F 1 -F 2 The swept-frequency radiation power corresponding to each frequency within, continuously generate microwave generation instructions and send them to the solid-state source and the radiation component. After receiving the microwave generation instructions, the solid-state source generates corresponding microwaves according to the swept-frequency radiation power corresponding to each frequency carried by the microwave generation instructions, and transmits the microwaves to the radiation component through a coaxial cable; the radiation component is used to frequency-modulate and phase-modulate the microwaves generated by the solid-state source according to the swept-frequency radiation power corresponding to each frequency carried by the microwave generation instructions, and radiate the frequency-modulated and phase-modulated microwaves into the internal cavity of the housing, so as to perform cyclic swept-frequency radiation on the target object placed in the internal cavity within 1 min.

[0096] It should be noted that the cyclic swept-frequency radiation on the target object can be carried out by the microwave control device based on the received microwave heating instruction. The microwave heating instruction refers to an instruction to perform microwave radiation on the food to be heated to heat the food.

[0097] Among them, the microwave heating instruction can be issued by the user through a control panel pre-integrated on the microwave device. The control panel can be provided with a mechanical knob, a button or a touch screen. The user issues the microwave heating instruction to the microwave control device by rotating the mechanical knob, pressing the button, or clicking on the virtual button on the touch screen that represents microwave heating. Or, the microwave heating instruction can be automatically generated by the microwave control device. As an example, when the user puts the food to be heated into the internal cavity of the microwave device, the above weighing device can weigh the loaded food to obtain the corresponding weight parameter, and then the weighing device can send the weight parameter to the microwave control device. When the weight parameter reaches the preset weight threshold, the microwave control device automatically generates a microwave heating instruction.

[0098] In this embodiment, the microwave control device can continuously generate corresponding microwave generation instructions within the preset identification frequency range and the preset swept-frequency radiation power within the preset identification time range, and send them to the solid-state source and the radiation component in the microwave device. The solid-state source generates corresponding microwaves according to the swept-frequency radiation power corresponding to each frequency within the preset identification frequency range carried by the microwave generation instructions, and the radiation component frequency-modulates and phase-modulates the microwaves generated by the solid-state source according to each frequency within the preset identification frequency range carried by the microwave generation instructions, and then radiates them to the target object placed in the internal cavity of the microwave device to perform swept-frequency radiation on the target object.

[0099] Step 304: Collect the recognition absorption power of the target object at each frequency within the preset recognition frequency range in each recognition processing cycle.

[0100] The recognition absorption power is used to indicate the energy absorbed by the target object from the microwaves sweep-radiated by the radiation component.

[0101] In this embodiment, the microwave control device can control the solid-state source to generate microwaves corresponding to the sweep in the recognition stage according to each frequency within the preset recognition frequency range and the sweep radiation power, and control the radiation component to radiate the microwaves to the surface of the target object for two or more sweeps in the recognition stage. The target object placed inside the cavity of the microwave device can absorb part of the microwaves and reflect the remaining microwaves back. The radiation component can further collect the microwaves reflected by the target object in two or more sweeps in the recognition stage and send them to the power meter set on the microwave device to measure the power of the microwaves absorbed by the target object. The power meter is connected to the microwave control device and can send the obtained absorption power to the microwave control device.

[0102] Step 306: Determine the target recognition frequency corresponding to the target object in each recognition processing cycle from the preset recognition frequency range according to the recognition absorption power.

[0103] In this embodiment, the microwave control device can sort the recognition absorption powers corresponding to each frequency collected in each recognition processing cycle in ascending order, and use the frequency corresponding to the maximum absorption power as the target recognition frequency in the current recognition processing cycle. It can be understood that the greater the absorption power, the more microwaves the target object absorbs, which means that the heating efficiency of the target object is better at this time. The target recognition frequency can be understood as the current best absorption frequency of the target object.

[0104] Step 308: Determine the item type of the target object based on the change degree of the target recognition frequency within the preset recognition time range for each recognition processing cycle, and perform microwave heating on the target object according to the item type until the stop heating requirement corresponding to the item type of the target object is met, and control the radiation component to stop microwave heating.

[0105] In this embodiment, the microwave control device can obtain the target recognition frequencies corresponding to each recognition processing cycle within the preset recognition time range, and determine the item type of the target object based on the change degree of the target recognition frequencies corresponding to each recognition processing cycle. The change speed of the absorption power of the target object can indirectly reflect the composition and structure of the target object. For example, to a certain extent, the change speed of the absorption power of the target object can reflect the water content of the target object.

[0106] As an example, the time taken for the radiation component to complete one sweep radiation according to the microwave generated by the solid-state source is 10 s. Within the preset recognition time range of 1 min, the microwave control device continuously generates microwave generation instructions based on the sweep radiation power corresponding to each frequency and sends them to the solid-state source and the radiation component. While the solid-state source receives the microwave generation instructions, generates microwaves according to the microwave generation instructions, and the radiation component radiates the microwaves into the internal cavity of the housing, the radiation component continuously collects the microwaves reflected by the target object within 1 min and sends the obtained absorption power to the microwave control device. The microwave control device takes the frequency corresponding to the maximum absorption power within each 10-s recognition processing cycle as the target recognition frequency corresponding to the current recognition processing cycle. Six target recognition frequencies are obtained within 1 min, and further the maximum value and the minimum value are extracted from these six target recognition frequencies to calculate the maximum difference for identifying the change degree of the target recognition frequency. When the maximum difference reaches 3 MHz, it can be considered that the item type of the target object is an easily heatable food; otherwise, it is considered that the item type of the target object is a non-easily heatable food. Among them, the easily heatable food is, for example, soup-like food. The sweep radiation power can be, for example, 50 W.

[0107] The microwave heating method provided by the embodiment of the present application can first perform repeated sweep radiation on the target object according to the preset recognition frequency range, so as to determine the current optimal absorption frequency of the target object during each sweep radiation process, and further determine the change degree of the optimal absorption frequency of the target object within a period of time. Finally, the item type of the target object is determined based on the change degree of the optimal absorption frequency. By detecting the microwave power absorbed by the target object and judging the composition and structure of the target object according to the change speed of the absorption degree of the target object, further identifying the food type based on the composition and structure of the target object, and adjusting the microwave heating method accordingly, the heating efficiency and accuracy of the microwave device can be significantly improved, and the user experience can be enhanced.

[0108] In some optional embodiments, step 308 includes:

[0109] When the change degree of the target recognition frequency within the preset recognition time range reaches the frequency change threshold, determine that the item type of the target object is the first type;

[0110] When the change degree of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, determine that the item type of the target object is the second type.

[0111] The frequency change threshold can be, for example, 3 MHz. The radiation component can continuously collect the microwaves reflected by the target object within a preset recognition time range, and determine the optimal absorption frequency corresponding to each recognition processing cycle within the preset recognition time range based on the obtained absorption power as the target recognition frequency. Further, calculate the difference between the target recognition frequencies corresponding to each recognition processing cycle to determine the degree of change of the target recognition frequency. When the difference reaches the frequency change threshold, the microwave control device can determine that the item type of the target object is the first type, and the first type is used to indicate that the target object is an easily heatable food, such as soup-like food; when the difference does not reach the frequency change threshold, the microwave control device can determine that the item type of the target object is the second type, and the second type is used to indicate that the target object is a non-easily heatable food, such as non-soup-like food

[0112] The above microwave heating method can, after determining the current optimal absorption frequency of the target object during each frequency sweep radiation process, further determine the degree of change of the optimal absorption frequency of the target object within a period of time, and compare the degree of change of the optimal absorption frequency with the frequency change threshold, so as to determine the item type of the target object to achieve rapid identification of the target object

[0113] In some optional embodiments, step 308 includes:

[0114] According to the preset heating frequency range, control the radiation component to perform frequency sweep radiation on the target object with the first heating radiation power; when the process of frequency sweep radiation covers the entire preset heating frequency range, a first heating processing cycle is formed

[0115] After completing the first heating processing cycle, collect the first heating absorption power of the target object at each frequency within the preset heating frequency range

[0116] According to the first heating absorption power, adjust the radiation power corresponding to at least some frequencies within the preset heating frequency range

[0117] Based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, repeat the frequency sweep radiation to heat the target object

[0118] Among them, the preset heating frequency range and the preset recognition frequency range can be the same, the frequency sweep radiation power corresponding to each frequency within the preset recognition frequency range and the first heating radiation power can be the same, or the first heating radiation power can be greater than the frequency sweep radiation power

[0119] In this embodiment, the microwave control device can control the solid-state source to generate microwaves corresponding to the frequency sweep of the first sub-stage in the heating stage at each frequency within the preset heating frequency range and the first heating radiation power, and control the radiation component to radiate the microwaves to the surface of the target object to perform a frequency sweep for the first sub-stage. The radiation component collects the first heating absorption power of the target object during the frequency sweep of the first sub-stage and sends it to the microwave control device. The microwave control device determines the frequencies that need to adjust the radiation power from the preset heating frequency range according to the first heating absorption power. The first sub-stage is used to determine several frequencies with better heating effects within the preset heating frequency range.

[0120] Among them, the step of adjusting the first heating radiation power corresponding to at least some frequencies within the preset heating frequency range according to the first heating absorption power may include:

[0121] Based on the first heating absorption power of the target object at each frequency within the preset heating frequency range, screen out the target heating frequencies from the frequencies within the preset heating frequency range;

[0122] Replace the radiation power of the target heating frequency from the first heating radiation power with the second heating radiation power; the second heating radiation power is greater than the first heating radiation power.

[0123] The first heating radiation power can be, for example, 50W, and the second heating radiation power can be, for example, 200W.

[0124] In this embodiment, the microwave control device can use the frequency corresponding to the higher first heating absorption power as the target heating frequency and increase the radiation power corresponding to the target heating frequency, so as to achieve efficient heating.

[0125] Furthermore, the process of repeatedly performing frequency sweep radiation can be understood as the second sub-stage in the heating stage. The second sub-stage is used to efficiently heat the target object according to the second heating radiation power after increasing the several frequencies with better heating effects and the first heating radiation power of the remaining frequencies.

[0126] In this embodiment, the microwave control device can dynamically adjust the radiation power of each frequency within the preset heating frequency range during the microwave heating process based on the absorption power of the target object during the first frequency sweep radiation process in the heating stage, so as to achieve precise and efficient heating of the target object.

[0127] In some alternative embodiments, the target heating frequencies include the first target heating frequency and the second target heating frequency;

[0128] Based on the first heating absorption power of the target object at each frequency within the preset heating frequency range, screening out the target heating frequencies from the frequencies within the preset heating frequency range includes:

[0129] Based on the first heating absorption power of the target object at each frequency within the preset heating frequency range, the maximum heating absorption power is screened out.

[0130] Based on the maximum heating absorption power and the first preset ratio, a first critical value is determined, and the frequency corresponding to the first heating absorption power higher than the first critical value is used as the first target heating frequency.

[0131] When the proportion of the target heating frequency in all frequencies within the preset heating frequency range is lower than the preset lower limit value, based on the maximum heating absorption power and the second preset ratio, a second critical value is determined, and the frequency corresponding to the first heating absorption power higher than the second critical value but lower than the first critical value is used as the second target heating frequency.

[0132] According to the first heating absorption power, the radiation power corresponding to at least some frequencies within the preset heating frequency range is adjusted, including:

[0133] The radiation power of the first target heating frequency is replaced from the first heating radiation power to the second heating radiation power, and the radiation power of the second target heating frequency is replaced from the first heating radiation power to the third heating radiation power; the third heating radiation power is greater than the first heating radiation power but less than the second heating radiation power.

[0134] In this embodiment, the microwave control device can screen out the maximum first heating absorption power from the first heating absorption power, multiply the maximum first heating absorption power by the first preset ratio to obtain the first critical value, and use the frequency corresponding to the first heating absorption power higher than the first critical value as the first target heating frequency. The first preset ratio can be, for example, 90%.

[0135] When the ratio of the total number of the first target heating frequencies to the total number of frequencies within the preset heating frequency range is less than the preset lower limit value, the microwave control device can determine that the number of target heating frequencies is too small at this time. If only the radiation power of the current target heating frequency is adjusted, the adjustment effect on the heating efficiency of the radiation component is not obvious. At this time, the microwave control device can multiply the maximum first heating absorption power by the second preset ratio to obtain the second critical value, and use the frequency corresponding to the first heating absorption power greater than the second critical value and less than the first critical value as the second target heating frequency to increase the number of target heating frequencies. Among them, the preset lower limit value is, for example, 5%, and the second preset ratio can be, for example, 80%.

[0136] The second critical value is less than the first critical value.

[0137] The microwave control device can first determine a first critical value based on the maximum first heating absorption power and a first preset ratio, and screen out the frequencies with the first heating absorption power greater than the first critical value as the first target heating frequencies. Further, it determines the ratio of the total number of the first target heating frequencies to the total number of frequencies within the preset heating frequency range. If this ratio reaches the preset lower limit value, the first target heating frequencies are directly regarded as the target heating frequencies, that is, it is defaulted that there are no second target heating frequencies. If this ratio is less than the preset lower limit value, the microwave control device can further determine a second critical value based on the maximum first heating absorption power and a second preset ratio, and screen out the frequencies with the first heating absorption power less than the first critical value and greater than the second critical value as the second target heating frequencies to increase the number of target heating frequencies.

[0138] The third heating radiation power can be, for example, 150W.

[0139] In the above microwave heating method, by dynamically adjusting the power of frequencies with different heating effects, for the power absorption changes of the target object at different frequency points, the power output of the frequency points with a larger power absorption amount is increased. Through this dynamic processing, the efficient processing of the microwave absorption of the target object can be realized, ensuring the efficient absorption of microwave energy by the target object and improving the heating efficiency.

[0140] In some optional embodiments, based on the degree of change of the target recognition frequencies within each recognition processing cycle within the preset recognition time range, the item type of the target object is determined, including:

[0141] When the degree of change of the target recognition frequencies within the preset recognition time range reaches the frequency change threshold, it is determined that the item type of the target object is the first type;

[0142] When the degree of change of the target recognition frequencies within the preset recognition time range does not reach the frequency change threshold, it is determined that the item type of the target object is the second type;

[0143] Based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range, and the first heating radiation power corresponding to the remaining frequencies, repeated frequency sweep radiation is carried out to heat the target object, including:

[0144] When the item type of the target object is the second type, based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, repeated frequency sweep radiation is carried out. When the process of the frequency sweep radiation covers the entire preset heating frequency range, a second heating processing cycle is formed;

[0145] Collect the second heating absorption power of the target object at each frequency within the preset heating frequency range in each second heating processing cycle;

[0146] When the change rate of the second heating absorption power of the target object reaches the first absorption power change threshold within any two adjacent second heating treatment cycles, repeat the following process:

[0147] Control the radiation component to perform frequency-sweeping radiation on the target object at the first heating radiation power according to the preset heating frequency range;

[0148] After completing the first heating treatment cycle, collect the first heating absorption power of the target object at each frequency within the preset heating frequency range;

[0149] Adjust the radiation power corresponding to at least some frequencies within the preset heating frequency range according to the first heating absorption power;

[0150] Based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, repeat the frequency-sweeping radiation to heat the target object;

[0151] When the change rate of the second heating absorption power of the target object is less than the second absorption power change threshold within any two adjacent second heating treatment cycles, determine that the heating stop requirement is met and stop heating the target object.

[0152] When facing difficult-to-heat foods, the microwave control device can control the radiation component to perform two or more cycles of frequency-sweeping radiation on the target object according to the second heating radiation power corresponding to the first target heating frequency, the third heating radiation power corresponding to the second target heating frequency, and the first heating radiation power corresponding to the remaining frequencies within the preset heating frequency range.

[0153] Meanwhile, the microwave control device can collect the second heating absorption power of the target object at each frequency within the preset heating frequency range during each cycle of frequency-swept radiation in the second sub-phase, and determine the maximum second heating absorption power therefrom. If the change amplitude of the maximum second heating absorption power reaches the first absorption power change threshold during any two adjacent frequency-swept radiation processes, it can be considered at this time that the properties of the target object have changed significantly. If the microwave heating is still carried out according to the second heating radiation power corresponding to the first target heating frequency, the third heating radiation power corresponding to the second target heating frequency, and the first heating radiation power corresponding to the remaining frequencies within the preset heating frequency range, the heating effect will decline. At this time, the microwave control device can control the solid-state source to generate microwaves corresponding to the frequency-swept of the first sub-phase in the heating phase again according to each frequency and the first heating radiation power within the preset heating frequency range, and control the radiation component to radiate the microwaves to the surface of the target object to perform the frequency-sweeping again in the first sub-phase. The radiation component collects the first heating absorption power of the target object again during a frequency-sweeping in the first sub-phase and sends it to the microwave control device. The microwave control device re-determines the first target heating power and the second target heating power according to the first heating absorption power corresponding to this frequency-sweeping process, so as to re-adjust the radiation power corresponding to each frequency within the preset heating frequency range in the second sub-phase. Subsequently, it controls the solid-state source to generate microwaves corresponding to the frequency-sweeping in the second sub-phase according to the radiation power corresponding to each frequency within the preset heating frequency range in the second sub-phase, and controls the radiation component to radiate the microwaves to the surface of the target object to perform two or more frequency-sweeping in the second sub-phase... and so on. The first absorption power change threshold can be, for example, 10%.

[0154] Until the change amplitude of the maximum second heating absorption power is less than the second absorption power change threshold during any two adjacent frequency-swept radiation processes in the second sub-phase, at this time the microwave control device can consider that the absorption of the target object to the microwave has not changed significantly, and the microwave control device can control the radiation component to stop the microwave heating. The second change rate threshold is, for example, 5%.

[0155] When the change amplitude of the maximum second heating absorption power is less than the second absorption power change threshold during any two adjacent frequency-swept radiation processes in the second sub-phase, the microwave control device can consider that the absorption of the target object to the microwave no longer changes significantly, and the reason for this change may be that the temperature of the target object no longer changes significantly. At this time, it can be considered that the target object has been heated up.

[0156] When the microwave device is provided with a radiation component, the microwave control device can obtain the difference between the maximum second heating absorption power of the radiation component in the (n + 1)-th second heating treatment cycle and the maximum second heating absorption power in the n-th second heating treatment cycle, and further divide the difference by the maximum second heating absorption power in the n-th second heating treatment cycle to obtain the change amplitude of the maximum second heating absorption power of the target object in the (n + 1)-th frequency sweep radiation and the n-th frequency sweep radiation.

[0157] When the microwave device is provided with two or more radiation components, the microwave control device can, for each radiation component, collect the second heating absorption power of the target object at each frequency within the preset heating frequency range during each cycle of frequency sweep radiation in the second sub-stage, and determine the maximum second heating absorption power therefrom; further calculate the difference between the maximum second heating absorption power of each radiation component in the (n + 1)-th second heating treatment cycle and the maximum second heating absorption power in the n-th second heating treatment cycle, and then divide the sum of the differences corresponding to each radiation component by the sum of the maximum second heating absorption powers of each radiation component in the n-th second heating treatment cycle to obtain the change amplitude of the maximum second heating absorption power of the target object in the (n + 1)-th frequency sweep radiation and the n-th frequency sweep radiation. Here, n is greater than or equal to 1.

[0158] As an example, the change amplitude of the second heating absorption power can be expressed as:

[0159]

[0160] where ΔP represents the change amplitude of the second heating absorption power, P m,i+1 represents the maximum second heating absorption power of the m-th radiation component in the (i + 1)-th heating treatment cycle, P m,i represents the maximum second heating absorption power of the m-th radiation component in the i-th heating treatment cycle, m ∈ M, M represents the total number of radiation components, P 1,i+1 represents the maximum second heating absorption power of the first radiation component in the (i + 1)-th heating treatment cycle, P 1,i represents the maximum second heating absorption power of the first radiation component in the i-th heating treatment cycle.

[0161] The microwave control method of this embodiment can monitor the absorption of the target object to microwaves by real-time monitoring the change of the second heating absorption power of the target object. When the microwave absorption ability of the target object changes significantly, it can be considered that the temperature of the target object changes significantly, so as to timely adjust the radiation power of the radiated microwaves, thereby improving the accuracy and efficiency of microwave heating to perform customized microwave heating treatment on the target object.

[0162] In some alternative embodiments, determining the item type of the target object based on the degree of change of the target recognition frequency within a preset recognition time range includes:

[0163] When the degree of change of the target recognition frequency within the preset recognition time range reaches the frequency change threshold, determining that the item type of the target object is the first category;

[0164] When the degree of change of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, determining that the item type of the target object is the second category;

[0165] The steps of determining compliance with the requirement to stop heating include:

[0166] When the item type of the target object is the first category, after a preset heating time, collecting the actual temperature value corresponding to the target object, and when the actual temperature value reaches the preset temperature threshold, determining compliance with the requirement to stop heating.

[0167] Since the properties of easily heated foods, i.e., soup-like foods, are relatively unstable, it is inaccurate to use the change in the heating absorption power of the above-mentioned non-easily heated foods as the basis for judging their heating status. In this embodiment, by adding a thermal imaging device to the microwave device, the temperature information on the surface of the target object is collected to accurately reflect the heating status of the target object.

[0168] In this embodiment, when the item type indicates that the item category of the target object is the first category and the duration of the cyclic sweep radiation in the second sub-phase by the radiation component reaches the preset heating time, the microwave control device can generate a temperature field recognition instruction and send it to the thermal imaging device. The thermal imaging device can collect the infrared radiation emitted from the surface of the target object, then convert the received infrared radiation into an electrical signal, and after circuit processing, send the processed digital signal to the microwave control device, so that the microwave control device converts the digital signal into a visual thermal image, determines the actual temperature value of the target object based on the thermal image, and when the actual temperature value reaches the preset temperature threshold, generates a stop generation instruction and sends it to the solid-state source to control the solid-state source to stop generating microwaves and stop the microwave heating of the target object.

[0169] In the microwave heating method of this embodiment, it is possible to control the microwave device to stop microwave heating by adopting a specific temperature control method based on the item type of the target object, thereby improving the microwave heating effect and further enhancing the user experience.

[0170] In some alternative embodiments, the microwave device includes two or more radiation components;

[0171] Performing microwave heating on the target object according to the item type includes:

[0172] According to the arranged order of each radiation component set in advance and the preset heating frequency range, control the first radiation component to perform frequency-sweeping radiation on the target object at the first heating radiation power; when the process of frequency-sweeping radiation covers the entire preset heating frequency range, a first heating treatment cycle is formed;

[0173] According to the arranged order, when the previous radiation component completes half of the first heating treatment cycle, control the subsequent radiation component to perform frequency-sweeping radiation on the target object at the first heating radiation power according to the preset heating frequency range;

[0174] For any radiation component, after completing the first heating treatment cycle, collect the first heating absorption power of the target object at each frequency within the preset heating frequency range;

[0175] According to the first heating absorption power, adjust the radiation power corresponding to at least some frequencies within the preset heating frequency range;

[0176] Based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, repeat the frequency-sweeping radiation to heat the target object.

[0177] That the previous radiation component completes half of the first heating treatment cycle is used to indicate the starting moment for the subsequent radiation component to radiate microwaves to the surface of the target object. In this embodiment, several radiation components provided inside the microwave device can be preset with an arranged order for indicating the sequential startup order. When the first radiation component starts to radiate microwaves to the surface of the target object, the radiation component in the second position in the arranged order can start to radiate microwaves when the first radiation component completes half of the first heating treatment cycle; the radiation component in the third position in the arranged order can start to radiate microwaves when the radiation component in the second position in the arranged order completes half of the first heating treatment cycle... and so on.

[0178] The microwave control device can, according to the moments when each radiation component starts to radiate microwaves, control the solid-state source to generate microwaves corresponding to the frequency sweep in the first sub-stage of the heating stage for each radiation component according to a preset heating frequency range and a first heating radiation power, and control each radiation component to radiate the microwaves to the surface of the target object to perform a frequency sweep in the first sub-stage. The radiation component collects the first heating absorption power of the target object for each frequency in the first sub-stage and sends it to the microwave control device. The microwave control device adjusts the radiation power corresponding to each frequency in the second sub-stage according to the first heating absorption power, and then controls the solid-state source to generate microwaves corresponding to the frequency sweep in the second sub-stage according to the radiation power corresponding to each frequency within the preset heating frequency range, and controls each radiation component to radiate the microwaves to the surface of the target object to perform microwave heating in the second sub-stage... and so on. Through the dynamic regulation of the radiation power in each frequency sweep radiation process, precise heating of the target object can be achieved. It should be noted that in the scenario of multiple radiation components, the adjustment logic of the radiation power corresponding to each frequency of the microwaves radiated by each radiation component is the same as that in the scenario of a single radiation component, and the only difference is that the moments when multiple radiation components start to radiate microwaves are different.

[0179] In one embodiment, the microwave device includes two or more radiation components;

[0180] Determining the item type of the target object based on the degree of change of the target recognition frequency within a preset recognition time range in each recognition processing cycle includes:

[0181] When the degree of change of the target recognition frequency within the preset recognition time range reaches the frequency change threshold, determining that the item type of the target object is the first type;

[0182] When the degree of change of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, determining that the item type of the target object is the second type;

[0183] The steps of collecting the actual temperature value corresponding to the target object include:

[0184] After a preset heating time, dividing the target object into multiple regions evenly according to the number of radiation components;

[0185] Detecting the temperature values of each region of the target object. When the average temperature value of each region of the target object is lower than the preset temperature threshold, screening out the low-temperature regions based on the temperature values of each region and increasing the radiation power of the radiation components corresponding to the low-temperature regions;

[0186] Taking the preset heating time as an interval, repeating the detection of the temperature values of each region of the target object. If the difference between the temperature values corresponding to any two regions is less than the lower temperature limit value, restoring the radiation power of the radiation components corresponding to the low-temperature regions;

[0187] When the average temperature value of each area of the target object is not lower than the preset temperature threshold, it is determined that the requirement for stopping heating is met.

[0188] The step of detecting the temperature values of each area of the target object can be, for example, that the microwave control device uses a thermal imaging device to identify the temperature field of the target object, so as to obtain at least one discrete temperature value in the area corresponding to each radiation component on the target object, and further determine the area temperature value corresponding to the radiation component based on at least one discrete temperature value in the area corresponding to each radiation component. Finally, the average value of the area temperature values of each area is calculated as the actual temperature value of the target object.

[0189] It should be noted that the thermal imaging device is arranged on the second end face and collects infrared radiation towards the lower end face of the housing in the height direction. Therefore, the generated thermal image corresponds to the lower end face. In this embodiment, the heating range corresponding to each radiation component in the lower end face is pre-divided. Therefore, after the microwave control device obtains a number of discrete temperature values, it can match the area corresponding to the heating range of each radiation component from the thermal image, and calculate the average value of the discrete temperature values included in each area as the area temperature value corresponding to the radiation component.

[0190] Furthermore, when the actual temperature value of the target object is lower than the preset temperature threshold, the microwave control device can arrange the area temperature values of each radiation component in descending order, and take the areas corresponding to the last several area temperature values as low-temperature areas. Subsequently, the microwave control device can increase the heating radiation power of the radiation components corresponding to the low-temperature areas according to a preset increase. The preset increase is, for example, +50W.

[0191] In another embodiment, when the actual temperature value of the target object reaches the preset temperature threshold, the microwave control device can determine that the requirement for stopping heating corresponding to the first type is met, so as to control the radiation component to stop radiating microwaves.

[0192] As an example, after the microwave control device adjusts the radiation power corresponding to at least some frequencies within the preset heating frequency range according to the first heating absorption power, it can determine that the radiation powers of eight frequencies within the preset heating frequency range are the first heating radiation power of 50 W, and two frequencies are used as the target heating frequencies, and the corresponding radiation powers are the second heating radiation power of 150 W. Although the microwave control device determines the start time of each radiation component to radiate microwaves according to the arrangement order of multiple radiation components, and controls the solid state source to generate the microwaves required for each radiation component according to the first heating radiation power of 50 W for eight frequencies and the second heating radiation power of 150 W for two frequencies within the preset heating frequency range to heat the target object. After the duration of the swept-frequency radiation of the first radiation component in the second sub-stage reaches the preset heating time, the microwave control device can determine the regional temperature values of the heating ranges corresponding to each radiation component based on the thermal image collected by the thermal imaging device. Subsequently, the regional temperature values of each radiation component are arranged in descending order, and the regions corresponding to several of the last regional temperature values are used as the low-temperature regions. For the radiation components corresponding to the low-temperature regions, the microwave control device can increase the radiation power of the target heating frequency corresponding to the radiation component, that is, the radiation powers of the two target heating frequencies are adjusted from 150 W to 200 W. Subsequently, the microwave control device controls the solid state source to continue to generate the microwaves corresponding to the current radiation component according to the first heating radiation power of 50 W for eight frequencies and the radiation powers of 200 W for the two target heating frequencies within the preset heating frequency range to perform microwave heating on the target object, so as to increase the temperature within the heating range corresponding to the radiation component.

[0193] In this embodiment, the microwave control device can generate a temperature field recognition instruction and send it to the thermal imaging device when the duration of the swept-frequency radiation of the radiation component that starts the swept-frequency radiation at the beginning reaches the preset heating time. The thermal imaging device can detect the amount of infrared radiation radiated from the surface of the target object, convert the received infrared radiation into an electrical signal, and perform circuit processing on it. Subsequently, the processed digital signal is sent to the microwave control device, so that the microwave control device can convert the digital signal into a visual thermal image and obtain several discrete temperature values included in the thermal image, thereby obtaining the regional temperature values corresponding to each radiation component. At this time, the microwave control device can calculate the actual temperature value of the target object based on the regional temperature values corresponding to each radiation component. When the actual temperature value does not reach the preset temperature value, the microwave control device can screen out the low-temperature regions based on the regional temperature values corresponding to each radiation component and adjust the radiation power of the target heating frequency in the radiation components corresponding to the low-temperature regions according to the preset increase.

[0194] The above microwave heating method can monitor the heating condition of the target object by real-time monitoring of the actual surface temperature of the target object. When the temperature of the area on the surface of the target object is relatively low, it can be directly considered that the heating degree of the radiation component corresponding to the current area in the heating range is insufficient, and then the radiation power of the target heating frequency corresponding to the radiation component is controlled to increase, so as to improve the accuracy and efficiency of microwave heating and ensure uniform heating of the target object.

[0195] It should be understood that although the steps in the flowcharts involved in the above embodiments are sequentially shown according to the indication of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0196] The embodiment of the present application also provides a device for implementing the method involved above. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more device embodiments provided below can refer to the limitations on the method in the above text, and will not be repeated here.

[0197] In one embodiment, as Figure 4 shown, a microwave heating device 400 is provided, including:

[0198] A control module 402, configured to control the radiation component of the microwave device to perform cyclic frequency scanning radiation on the target object within a preset identification time range according to a preset identification frequency range; when the process of frequency scanning radiation covers the entire preset identification frequency range, an identification processing cycle is formed, and the preset identification time range includes two or more identification processing cycles;

[0199] An acquisition module 404, configured to acquire the identification absorption power of the target object at each frequency within the preset identification frequency range in each identification processing cycle;

[0200] A determination module 406, configured to determine the target identification frequency corresponding to the target object within each identification processing cycle from the preset identification frequency range according to the identification absorption power;

[0201] The heating module 408 is configured to determine the item type of the target object based on the degree of change of the target recognition frequency within a preset recognition time range during each recognition processing cycle, and perform microwave heating on the target object according to the item type until the stop heating requirement corresponding to the item type of the target object is met, and then control the radiation component to stop microwave heating.

[0202] In some alternative embodiments, the heating module 408 is further configured to:

[0203] When the degree of change of the target recognition frequency within the preset recognition time range reaches the frequency change threshold, determine that the item type of the target object is the first type;

[0204] When the degree of change of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, determine that the item type of the target object is the second type.

[0205] In some alternative embodiments, the heating module 408 is further configured to:

[0206] According to the preset heating frequency range, control the radiation component to perform swept-frequency radiation on the target object with a first heating radiation power; when the process of swept-frequency radiation covers the entire preset heating frequency range, a first heating processing cycle is formed;

[0207] After completing the first heating processing cycle, collect the first heating absorption power of the target object at each frequency within the preset heating frequency range;

[0208] According to the first heating absorption power, adjust the radiation power corresponding to at least some frequencies within the preset heating frequency range;

[0209] Based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, repeat the swept-frequency radiation to heat the target object.

[0210] In some alternative embodiments, the heating module 408 is further configured to:

[0211] Based on the first heating absorption power of the target object at each frequency within the preset heating frequency range, screen out the target heating frequencies from the various frequencies within the preset heating frequency range;

[0212] Replace the radiation power of the target heating frequencies from the first heating radiation power with the second heating radiation power;

[0213] The second heating radiation power is greater than the first heating radiation power.

[0214] In some alternative embodiments, the target heating frequencies include a first target heating frequency and a second target heating frequency;

[0215] The heating module 408 is further configured to:

[0216] Based on the first heating absorption power of the target object at each frequency within the preset heating frequency range, screen out the maximum heating absorption power;

[0217] Based on the maximum heating absorption power and the first preset ratio, determine the first critical value, and use the frequency corresponding to the first heating absorption power higher than the first critical value as the first target heating frequency;

[0218] When the proportion of the target heating frequency in all frequencies within the preset heating frequency range is lower than the preset lower limit value, based on the maximum heating absorption power and the second preset ratio, determine the second critical value, and use the frequency corresponding to the first heating absorption power higher than the second critical value but lower than the first critical value as the second target heating frequency;

[0219] Adjust the radiation power corresponding to at least some frequencies within the preset heating frequency range according to the first heating absorption power, including:

[0220] Replace the radiation power of the first target heating frequency from the first heating radiation power with the second heating radiation power, and replace the radiation power of the second target heating frequency from the first heating radiation power with the third heating radiation power; the third heating radiation power is greater than the first heating radiation power but less than the second heating radiation power.

[0221] In some alternative embodiments, the heating module 408 is further configured to:

[0222] When the item type of the target object is the second type, based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, perform repeated sweep-frequency radiation, and when the process of sweep-frequency radiation covers the entire preset heating frequency range, form a second heating treatment cycle;

[0223] Collect the second heating absorption power of the target object at each frequency within the preset heating frequency range in each second heating treatment cycle;

[0224] When the change rate of the second heating absorption power of the target object reaches the first absorption power change threshold value within any two adjacent second heating treatment cycles, repeat the following process:

[0225] Control the radiation component to perform sweep-frequency radiation on the target object at the first heating radiation power according to the preset heating frequency range;

[0226] After completing the first heating treatment cycle, collect the first heating absorption power of the target object at each frequency within the preset heating frequency range;

[0227] Adjust the radiation power corresponding to at least some of the frequencies within the preset heating frequency range according to the first heating absorption power;

[0228] Based on the adjusted radiation power corresponding to at least some of the frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, repeatedly perform sweep-frequency radiation to heat the target object;

[0229] When the change rate of the second heating absorption power of the target object is less than the second absorption power change threshold within any two adjacent second heating treatment cycles, it is determined that the heating stop requirement is met, and the heating of the target object is stopped.

[0230] In some alternative embodiments, the heating module 408 is further configured to:

[0231] When the item type of the target object is the first type, after a preset heating time, collect the actual temperature value corresponding to the target object, and when the actual temperature value reaches the preset temperature threshold, it is determined that the heating stop requirement is met.

[0232] In some alternative embodiments, the microwave device includes two or more radiation components;

[0233] The heating module 408 is further configured to:

[0234] According to the arranged order of each radiation component set in advance and the preset heating frequency range, control the first radiation component to perform sweep-frequency radiation on the target object with the first heating radiation power; when the process of sweep-frequency radiation covers the entire preset heating frequency range, a first heating treatment cycle is formed;

[0235] According to the arranged order, when the previous radiation component has completed half of the first heating treatment cycle, control the subsequent radiation component to perform sweep-frequency radiation on the target object with the first heating radiation power according to the preset heating frequency range;

[0236] For any one radiation component, after completing the first heating treatment cycle, collect the first heating absorption power of the target object at each frequency within the preset heating frequency range;

[0237] Adjust the radiation power corresponding to at least some of the frequencies within the preset heating frequency range according to the first heating absorption power;

[0238] Based on the adjusted radiation power corresponding to at least some of the frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, repeatedly perform sweep-frequency radiation to heat the target object.

[0239] In some alternative embodiments, the heating module 408 is further configured to:

[0240] After a preset heating time, the target object is evenly divided into multiple regions according to the number of radiation components;

[0241] Detect the temperature values of each region of the target object. When the average temperature value of each region of the target object is lower than the preset temperature threshold, screen out the low-temperature regions based on the temperature values of each region, and increase the radiation power of the radiation components corresponding to the low-temperature regions;

[0242] At intervals of the preset heating time, repeatedly detect the temperature values of each region of the target object. If the difference between the corresponding temperature values of any two regions is less than the lower temperature limit, restore the radiation power of the radiation components corresponding to the low-temperature regions;

[0243] When the average temperature value of each region of the target object is not lower than the preset temperature threshold, it is determined that the requirement for stopping heating is met.

[0244] Each module in the above device can be implemented in whole or in part by software, hardware, and their combination. Each of the above modules can be embedded in the processor of the electronic device in hardware form or independent of it, or stored in the memory of the electronic device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0245] The device provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here in this embodiment.

[0246] Figure 5 It is a schematic structural diagram of a computer provided by this application. As Figure 5 shown, the electronic device 50 provided in this embodiment includes: at least one processor 501 and a memory 502. Optionally, the device 50 further includes a communication component 503. Among them, the processor 501, the memory 502, and the communication component 503 are connected through a bus 504.

[0247] In the specific implementation process, at least one processor 501 executes the computer execution instructions stored in the memory 502, so that at least one processor 501 executes the above method.

[0248] The specific implementation process of the processor 501 can refer to the above method embodiment, and its implementation principle and technical effect are similar, which will not be elaborated here in this embodiment.

[0249] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU for short), or other general-purpose processors, digital signal processors (DSP for short), application specific integrated circuits (ASIC for short), etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the invention can be directly implemented by the execution of the hardware processor, or implemented by the combination of hardware and software modules in the processor.

[0250] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include non-volatile memory (Non-volatile Memory, NVM), such as at least one disk memory.

[0251] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, 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 sake of representation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

[0252] This application also provides a computer program product, including a computer program, which implements the above microwave heating method when executed by a processor.

[0253] This application also provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the processor executes the computer-executable instructions, the above microwave heating method is implemented.

[0254] The above-readable storage medium can be implemented 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, a magnetic disk or an optical disk. The readable storage medium can be any available medium accessible by a general-purpose or special-purpose computer.

[0255] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component 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 a device.

[0256] The division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Additionally, the couplings or direct couplings or communication connections shown or discussed among each other can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0257] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0258] Furthermore, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0259] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or a part of this technical solution can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing an electronic device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks or optical discs that can store program codes.

[0260] Those of ordinary skill in the art will understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments; and the foregoing storage medium includes: various media such as ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0261] Finally, it should be noted that: After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily conceive of other embodiments of the present invention. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed by the present invention. It is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A microwave heating method, characterized in that: include: According to the preset identification frequency range, the radiation component of the microwave device is controlled to perform cyclic frequency sweep radiation on the target object within the preset identification time range; when the frequency sweep radiation process covers the entire preset identification frequency range, an identification processing cycle is formed, and the preset identification time range includes two or more identification processing cycles; Collecting the identification absorption power of the target object at each frequency within the preset identification frequency range in each identification processing cycle; According to the recognition absorption power, determining the target recognition frequency corresponding to the target object in each recognition processing cycle from the preset recognition frequency range; Based on the degree of change of the target recognition frequency in each recognition processing cycle within a preset recognition time range, the item type of the target object is determined, so that the target object is subjected to microwave heating according to the item type until the heating stopping requirement corresponding to the item type of the target object is met, and the radiation component is controlled to stop microwave heating.

2. The method according to claim 1, characterized in that The determining the object type of the target object based on the degree of change of the target recognition frequency in each recognition processing cycle within a preset recognition time range includes: When the change degree of the target recognition frequency within the preset recognition time range reaches a frequency change threshold, determining that the object type of the target object is a first category; When the change degree of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, it is determined that the object type of the target object is the second category.

3. The method according to claim 1, characterized in that The step of performing microwave heating on the target object according to the type of the object comprises: According to a preset heating frequency range, controlling the radiation component to perform frequency sweeping radiation on the target object with a first heating radiation power; a first heating treatment cycle is formed when the frequency sweeping radiation process covers the entire preset heating frequency range; After completing the first heating process cycle, collecting the first heating absorption power of the target object at each frequency within the preset heating frequency range; According to the first heating absorption power, adjusting the radiation power corresponding to at least part of the frequencies within the preset heating frequency range; Based on the adjusted radiation power corresponding to at least part of the frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, the swept frequency radiation is repeatedly performed to heat the target object.

4. The method according to claim 3, characterized in that The step of adjusting the first heating radiation power corresponding to at least part of the frequencies within the preset heating frequency range according to the first heating absorption power comprises: Based on the first heating absorption power of the target object at each frequency within the preset heating frequency range, screening out a target heating frequency from each frequency within the preset heating frequency range; replacing the radiation power of the target heating frequency from the first heating radiation power to the second heating radiation power; The second heating radiation power is greater than the first heating radiation power.

5. The method according to claim 4, characterized in that The target heating frequency includes a first target heating frequency and a second target heating frequency; The step of selecting a target heating frequency from each frequency within the preset heating frequency range based on the first heating absorption power of the target object at each frequency within the preset heating frequency range comprises: Based on the first heating absorption power of the target object at each frequency within a preset heating frequency range, screening out the maximum heating absorption power; Based on the maximum heating absorption power and the first preset ratio, a first critical value is determined, and a frequency corresponding to a first heating absorption power higher than the first critical value is used as the first target heating frequency; When the target heating frequency accounts for a proportion of all frequencies in the preset heating frequency range that is lower than a preset lower limit, a second critical value is determined based on the maximum heating absorption power and a second preset ratio, and a frequency corresponding to a first heating absorption power that is higher than the second critical value but lower than the first critical value is used as the second target heating frequency; The step of adjusting the radiation power corresponding to at least part of the frequencies within the preset heating frequency range according to the first heating absorption power comprises: The radiation power of the first target heating frequency is replaced from the first heating radiation power to the second heating radiation power, and the radiation power of the second target heating frequency is replaced from the first heating radiation power to the third heating radiation power; the third heating radiation power is greater than the first heating radiation power but less than the second heating radiation power.

6. The method according to claim 4 or 5, characterized in that: The determining the object type of the target object based on the degree of change of the target recognition frequency in each recognition processing cycle within a preset recognition time range includes: When the change degree of the target recognition frequency within the preset recognition time range reaches a frequency change threshold, determining that the object type of the target object is a first category; When the change degree of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, determining that the object type of the target object is the second category; The step of repeatedly performing frequency sweep radiation based on the adjusted radiation power corresponding to at least part of the frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies to heat the target object includes: When the object type of the target object is the second type, repeated frequency sweeping radiation is performed based on the adjusted radiation power corresponding to at least part of the frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, and a second heating treatment cycle is formed when the frequency sweeping radiation process covers the entire preset heating frequency range; collecting the second heating absorption power of the target object at each frequency within the preset heating frequency range in each of the second heating treatment cycles; When the change rate of the second heating absorption power of the target object reaches the first absorption power change threshold value in any two adjacent second heating treatment cycles, the following process is repeated: According to the preset heating frequency range, controlling the radiation component to perform frequency sweep radiation on the target object with the first heating radiation power; After completing the first heating process cycle, collecting the first heating absorption power of the target object at each frequency within the preset heating frequency range; According to the first heating absorption power, adjusting the radiation power corresponding to at least part of the frequencies within the preset heating frequency range; Repeating frequency sweep radiation based on the adjusted radiation power corresponding to at least some frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies to heat the target object; When the change rate of the second heating absorption power of the target object is less than the second absorption power change threshold value in any two adjacent second heating processing cycles, it is determined that the heating stop requirement is met, and heating of the target object is stopped.

7. The method according to claim 1, characterized in that The determining the object type of the target object based on the degree of change of the target recognition frequency in each recognition processing cycle within a preset recognition time range includes: When the change degree of the target recognition frequency within the preset recognition time range reaches a frequency change threshold, determining that the object type of the target object is a first category; When the change degree of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, determining that the object type of the target object is the second category; The steps of determining whether the heating stop requirement is met include: When the object type of the target object is the first category, after a preset heating time, an actual temperature value corresponding to the target object is collected, and when the actual temperature value reaches a preset temperature threshold, it is determined that the heating stop requirement is met.

8. The method according to claim 1, characterized in that: The microwave device includes two or more radiation components; The step of performing microwave heating on the target object according to the type of the object comprises: According to the preset arrangement order of the radiation components and the preset heating frequency range, the first radiation component is controlled to perform frequency sweeping radiation on the target object with a first heating radiation power; when the frequency sweeping radiation process covers the entire preset heating frequency range, a first heating treatment cycle is formed; According to the arrangement order, when the first radiation component completes half of the first heating process cycle, the second radiation component is controlled to perform frequency sweeping radiation on the target object with the first heating radiation power according to the preset heating frequency range; For any one of the radiation components, after completing the first heating process cycle, collecting the first heating absorption power of the target object at each frequency within the preset heating frequency range; According to the first heating absorption power, adjusting the radiation power corresponding to at least part of the frequencies within the preset heating frequency range; Based on the adjusted radiation power corresponding to at least part of the frequencies within the preset heating frequency range and the first heating radiation power corresponding to the remaining frequencies, the swept frequency radiation is repeatedly performed to heat the target object.

9. The method according to claim 1, characterized in that: The microwave device includes two or more radiation components; The determining the object type of the target object based on the degree of change of the target recognition frequency in each recognition processing cycle within a preset recognition time range includes: When the change degree of the target recognition frequency within the preset recognition time range reaches a frequency change threshold, determining that the object type of the target object is a first category; When the change degree of the target recognition frequency within the preset recognition time range does not reach the frequency change threshold, determining that the object type of the target object is the second category; After the target object is subjected to microwave heating according to the item type, the method further comprises: After a preset heating time, the target object is divided into a plurality of regions according to the number of the radiation components; Detecting the temperature values ​​of each area of ​​the target object, when the average temperature value of each area of ​​the target object is lower than a preset temperature threshold, screening out low-temperature areas based on the temperature values ​​of each area, and increasing the radiation power of the radiation component corresponding to the low-temperature area; Repeat the detection of the temperature values ​​of each area of ​​the target object at intervals of the preset heating time, and if the difference between the corresponding temperature values ​​of any two areas is less than the lower limit of the temperature, restore the radiation power of the radiation component corresponding to the low temperature area; When the average temperature value of each area of ​​the target object is not lower than the preset temperature threshold, it is determined that the heating stop requirement is met.

10. A microwave device, characterized in that: It comprises a shell, a microwave control device and a solid-state source arranged on the shell, and two or more radiation components, an image acquisition device and a thermal imaging device arranged in the inner cavity of the shell; The microwave control device is connected to the solid-state source, the radiation component and the image acquisition device respectively; The solid state source is connected to the radiation component: The microwave control device is used to determine the type of the target object and obtain the radiation power of each radiation component corresponding to each frequency within a preset heating frequency range by using the microwave control method according to any one of claims 1 to 9; The solid-state source is used to generate corresponding microwaves based on the radiation power corresponding to each frequency within the preset identification frequency range of each radiation component; The radiation component is used to radiate the microwave to the target object, so as to perform microwave heating on the target object placed in the cavity; The thermal imaging device is used to collect the temperature value corresponding to the target object.

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