Control method for microwave cooking appliance, microwave cooking appliance and storage medium

Abstract

Disclosed are a control method for a microwave cooking appliance (100), the microwave cooking appliance (100) and a storage medium. The microwave cooking appliance (100) comprises a microwave generation module (12) and a cavity (14). The control method comprises: controlling to turn on the microwave generation module (12); within a first preset duration after a microwave signal radiated from the cavity (14) is received, on the basis of the microwave signal, acquiring a first feature value of the microwave cooking appliance (100) in the current state; within a second preset duration after the first preset duration, on the basis of the microwave signal, acquiring a second feature value of the microwave cooking appliance (100) in the current state; and when the second feature value is greater than the first feature value, determining that the microwave cooking appliance (100) is in a no-load state, and controlling to turn off the microwave generation module (12) or reduce power.

Description

Control method of microwave cooking appliance, microwave cooking appliance and storage medium

[0001] Priority information

[0002] The present application claims priority to and the benefit of Chinese Patent Application Nos. 202410868165.4 and 202410868155.0, filed on June 28, 2024, with the State Intellectual Property Office of China, and incorporates by reference the entirety of the aforementioned applications. TECHNICAL FIELD

[0003] The present application relates to the technical field of household appliances, and in particular to a control method of a microwave cooking appliance, a microwave cooking appliance and a storage medium. BACKGROUND

[0004] In the related art, a microwave cooking appliance has a microwave source, which can emit microwaves into a cavity to heat food materials in the cavity. However, if the microwave source still works normally when the microwave cooking appliance is in an empty state, it is easy to cause damage to the microwave cooking appliance. SUMMARY

[0005] The present application provides a control method of a microwave cooking appliance, a microwave cooking appliance and a storage medium to solve at least one of the above technical problems.

[0006] In a first aspect, the present application provides a control method of a microwave cooking appliance, the microwave cooking appliance comprising a microwave generating module and a cavity, the microwave generating module being configured to emit microwaves into the cavity, the control method comprising:

[0007] controlling the microwave generating module to start to emit microwaves into the cavity;

[0008] acquiring a first characteristic value of the microwave cooking appliance in a current state according to a microwave signal emitted by the cavity within a first preset time period after the microwave signal is received;

[0009] acquiring a second characteristic value of the microwave cooking appliance in the current state according to the microwave signal within a second preset time period after the first preset time period;

[0010] in a case where the second characteristic value is greater than the first characteristic value, determining that the microwave cooking appliance is in an empty state and controlling the microwave generating module to be turned off or to reduce power.

[0011] In the control method of the microwave cooking appliance, in a case where it is determined that the microwave cooking appliance is in an empty state, the microwave generating module can be controlled to be turned off or to reduce power, so that the damage of the microwave cooking appliance due to the empty state can be avoided or alleviated to a certain extent.

[0012] In some embodiments, the first characteristic value is obtained by analyzing the microwave signal, and the analysis includes at least one of summation, averaging, and mean square deviation.

[0013] The second characteristic value is obtained by analyzing the microwave signal, and the analysis includes at least one of summation, averaging, and mean square deviation.

[0014] In some embodiments, the first preset time range is [2s, 5s], and the second preset time range is [2s, 5s].

[0015] In some embodiments, the control method comprises:

[0016] In the case that the microwave cooking appliance is in an empty load state, the microwave cooking appliance is controlled to issue an empty load prompt information.

[0017] In some embodiments, the control method comprises:

[0018] In the case that the second characteristic value is less than or equal to the first characteristic value, it is determined that the microwave cooking appliance is in a loaded state, and the microwave generating module is controlled to remain in the current state.

[0019] A microwave cooking appliance according to an embodiment of the present application comprises a control module, a microwave generating module, a microwave detection module, and a cavity, the control module is electrically connected to the microwave generating module and the microwave detection module, the microwave generating module is used to emit microwaves into the cavity, and the microwave detection module is used to detect microwave signals radiated by the cavity.

[0020] The control module is used to control the microwave generating module to start to emit microwaves into the cavity.

[0021] Within a first preset time after receiving the microwave signals radiated by the cavity, the control module is used to obtain a first characteristic value of the microwave cooking appliance in the current state according to the microwave signals.

[0022] Within a second preset time after the first preset time, a second characteristic value of the microwave cooking appliance in the current state is obtained according to the microwave signals.

[0023] In the case that the second characteristic value is greater than the first characteristic value, it is determined that the microwave cooking appliance is in an empty load state, and the microwave generating module is controlled to be turned off or to reduce power.

[0024] In some embodiments, the microwave detection module comprises a conversion circuit and an adjustment circuit, the conversion circuit is electrically connected to the adjustment circuit, the conversion circuit is configured to receive the microwave signal radiated by the cavity and convert the microwave signal into a voltage signal, and the adjustment circuit is configured to adjust the size of the voltage signal, and the voltage signal represents the first characteristic value and the second characteristic value.

[0025] In some embodiments, the conversion circuit comprises an antenna, a first capacitor, and a diode, the first capacitor is connected between the antenna and the positive electrode of the diode.

[0026] The adjustment circuit comprises a second capacitor and a resistor, the second capacitor and the resistor are connected in parallel, one end of the parallel connection of the second capacitor and the resistor is connected to the negative electrode of the diode, and the other end is connected to a ground terminal.

[0027] In some embodiments, the first preset time length is in the range of [2s, 5s], and / or the second preset time length is in the range of [2s, 5s].

[0028] In some embodiments, the control module is configured to control the microwave cooking appliance to issue an empty load prompt information in the case that the microwave cooking appliance is in an empty load state.

[0029] A microwave cooking appliance according to an embodiment of the present application comprises a processor, a memory, and a computer program stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the control method according to any one of the above embodiments are implemented.

[0030] An embodiment of the present application provides a computer-readable storage medium, and the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the control method according to any one of the above embodiments are implemented.

[0031] In the control method of the microwave cooking appliance, the microwave cooking appliance, and the storage medium, in the case that it is determined that the microwave cooking appliance is in an empty load state, the microwave generation module can be controlled to be turned off or to reduce power, so that the damage of the microwave cooking appliance due to the empty load can be avoided or alleviated to a certain extent.

[0032] In a second aspect, an embodiment of the present application provides a control method of a microwave cooking appliance, the microwave cooking appliance comprising a microwave generation module and a heating chamber, the microwave generation module being configured to emit microwaves to the heating chamber, and the control method comprising:

[0033] controlling the microwave generation module to start to emit microwaves to the heating chamber;

[0034] obtaining a microwave signal value radiated by the heating chamber;

[0035] determining that the microwave cooking appliance is in the sparking state and controlling the microwave generating module to be closed in the case that the microwave signal value is greater than the preset sparking characteristic value.

[0036] In the control method of the microwave cooking appliance, in the case that the microwave cooking appliance is determined to be in the sparking state, the microwave generating module can be controlled to be closed, so that the danger caused by the sparking of the microwave cooking appliance and the user can be avoided or alleviated to a certain extent.

[0037] In some embodiments, acquiring the microwave signal value radiated by the heating chamber comprises:

[0038] sampling a plurality of microwave signal values within a preset time length;

[0039] processing a plurality of microwave signal values to obtain a comparison value;

[0040] determining that the microwave cooking appliance is in the sparking state and controlling the microwave generating module to be closed in the case that the microwave signal value is greater than the preset sparking characteristic value, comprising:

[0041] determining that the microwave cooking appliance is in the sparking state and controlling the microwave generating module to be closed in the case that the comparison value is greater than the preset sparking characteristic value.

[0042] In some embodiments, the preset sparking characteristic value is an average value of a plurality of sparking characteristic values obtained during the sparking test of the microwave cooking appliance.

[0043] In some embodiments, the control method comprises:

[0044] controlling the microwave cooking appliance to issue a sparking prompt information in the case that the microwave cooking appliance is in the sparking state.

[0045] In some embodiments, the control method comprises:

[0046] controlling the microwave generating module to maintain the current state in the case that the microwave signal value is less than or equal to the preset sparking characteristic value.

[0047] A microwave cooking appliance provided by an embodiment of the present application comprises a control module, a microwave generating module, a microwave detection module and a heating chamber, the control module is electrically connected to the microwave generating module and the microwave detection module, the microwave generating module is used for emitting microwaves into the heating chamber, and the microwave detection module is used for detecting a microwave signal value radiated by the heating chamber.

[0048] The control module is used for:

[0049] controlling the microwave generating module to start to emit microwaves to the heating chamber;

[0050] acquiring, by the microwave detecting module, a microwave signal value of the microwave radiated by the heating chamber;

[0051] in a case where the microwave signal value is greater than a preset sparking feature value, determining that the microwave cooking appliance is in a sparking state and controlling the microwave generating module to stop.

[0052] In some embodiments, the control module is configured to:

[0053] sampling a plurality of microwave signal values within a preset time length;

[0054] processing the plurality of microwave signal values to obtain a comparison value;

[0055] in a case where the comparison value is greater than the preset sparking feature value, determining that the microwave cooking appliance is in a sparking state and controlling the microwave generating module to stop.

[0056] In some embodiments, the microwave detecting module comprises an antenna, a conversion circuit and an adjusting circuit, the conversion circuit is electrically connected to the antenna and the adjusting circuit, the antenna is configured to receive the microwave signal radiated by the heating chamber, the conversion circuit is configured to convert the microwave signal received by the antenna into a voltage signal, and the adjusting circuit is configured to adjust the size of the voltage signal, and the size of the voltage signal represents the microwave signal value.

[0057] In some embodiments, the conversion circuit comprises a first capacitor and a diode, and the first capacitor is connected between the antenna and the anode of the diode.

[0058] The adjusting circuit comprises a second capacitor and a resistor, and the second capacitor and the resistor are connected in parallel, one end of the second capacitor and the resistor connected in parallel is connected to the cathode of the diode, and the other end is connected to a ground terminal.

[0059] The microwave cooking appliance provided by the embodiment of the present application comprises a processor, a memory and a computer program stored in the memory and executable on the processor, and the computer program, when executed by the processor, implements the steps of the control method of any of the above-mentioned embodiments.

[0060] The present application provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and the computer program, when executed by a processor, implements the steps of the control method of any of the above-mentioned embodiments.

[0061] In the microwave cooking appliance and the computer readable storage medium, in the case that it is determined that the microwave cooking appliance is in the sparking state, the microwave generating module can be controlled to be closed, so that the danger caused by the sparking of the microwave cooking appliance and the user can be avoided or alleviated to a certain extent.

[0062] Additional aspects and advantages of the present application will be set forth in part in the following description, will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description only illustrate some of the embodiments of the present application, and other drawings can also be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0064] Fig. 1 is a flowchart of a control method of a microwave cooking appliance according to an embodiment of the present application;

[0065] Fig. 2 is a schematic diagram of a module of a microwave cooking appliance according to an embodiment of the present application;

[0066] Fig. 3 is a schematic diagram of a partial circuit structure of a microwave cooking appliance according to an embodiment of the present application;

[0067] Fig. 4 is a schematic diagram of a module of a microwave cooking appliance according to an embodiment of the present application;

[0068] Fig. 5 is a flowchart of a control method of a microwave cooking appliance according to an embodiment of the present application;

[0069] Fig. 6 is a flowchart of a control method of a microwave cooking appliance according to an embodiment of the present application;

[0070] Fig. 7 is a schematic diagram of a module of a microwave cooking appliance according to an embodiment of the present application;

[0071] Fig. 8 is a schematic diagram of a partial circuit structure of a microwave cooking appliance according to an embodiment of the present application;

[0072] Fig. 9 is a schematic diagram of a module of a microwave cooking appliance according to an embodiment of the present application;

[0073] Fig. 10 is a flowchart of a control method of a microwave cooking appliance according to an embodiment of the present application;

[0074] Fig. 11 is a flowchart of a control method of a microwave cooking appliance according to an embodiment of the present application.

[0075] Main element reference sign explanation: microwave cooking appliance 100, microwave generation module 12, cavity 14, heating chamber 140, control module 18, microwave detection module 20, prompting assembly 26, communication module 28, antenna 16, conversion circuit 22, adjustment circuit 24, processor 30, memory 32. DETAILED DESCRIPTION

[0076] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which the same or similar components have the same or similar designations and functions throughout the various figures and identical components are not described in detail. The embodiments described below are exemplary and are merely intended to explain the present application, and should not be construed as limiting the present application.

[0077] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application. In addition, the terms "first", "second" are for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0078] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be a fixed connection, or a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, or it can be an internal communication between two elements or an interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0079] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0080] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0081] Please refer to FIG. 1 and FIG. 2, the present application embodiment provides a control method of a microwave cooking appliance 100, the microwave cooking appliance 100 includes a microwave generating module 12 and a cavity 14, the microwave generating module 12 is used to emit microwave into the cavity 14.

[0082] The control method includes:

[0083] 01, control the microwave generating module 12 to start to emit microwave into the cavity 14;

[0084] 03, within a first preset time length after receiving the microwave signal radiated by the cavity 14, obtain a first characteristic value under the current state of the microwave cooking appliance 100 according to the microwave signal;

[0085] 05, within a second preset time length after the first preset time length, obtain a second characteristic value under the current state of the microwave cooking appliance 100 according to the microwave signal;

[0086] 07, in the case where the second characteristic value is greater than the first characteristic value, determine that the microwave cooking appliance 100 is in an empty load state and control the microwave generating module 12 to be turned off or to reduce power.

[0087] The control method of the embodiment of the application can be implemented by the microwave cooking appliance 100 of the embodiment of the application. Please refer to FIG. 2, the microwave cooking appliance 100 comprises a control module 18, a microwave generating module 12, a microwave detecting module 20 and a cavity 14, the control module 18 is electrically connected to the microwave generating module 12 and the microwave detecting module 20, the microwave generating module 12 is used for emitting microwaves into the cavity 14, and the microwave detecting module 20 is used for detecting the microwave signal radiated by the cavity 14;

[0088] The control module 18 is used for controlling the microwave generating module 12 to start to emit microwaves into the cavity 14.

[0089] Within a first preset time length after receiving the microwave signal radiated by the cavity 14, the control module 18 is used for obtaining a first characteristic value in the current state of the microwave cooking appliance 100 according to the microwave signal.

[0090] Within a second preset time length after the first preset time length, a second characteristic value in the current state of the microwave cooking appliance 100 is obtained according to the microwave signal.

[0091] In the case that the second characteristic value is greater than the first characteristic value, it is determined that the microwave cooking appliance 100 is in an empty load state and the microwave generating module 12 is controlled to be turned off or to reduce power.

[0092] The control method of the microwave cooking appliance 100 and the microwave cooking appliance 100, in the case that it is determined that the microwave cooking appliance 100 is in an empty load state, the microwave generating module 12 can be controlled to be turned off or to reduce power, so that the damage of the microwave cooking appliance 100 due to the empty load can be avoided or alleviated to a certain extent.

[0093] Specifically, the microwave cooking appliance 100 includes but is not limited to a microwave oven, a microwave oven, a microwave oven, an integrated stove, etc. The microwave generating module 12 includes a radio frequency module, a magnetron, etc. In one embodiment, the microwave cooking appliance 100 comprises a type of microwave generating module 12, and the microwave generating module 12 comprises a radio frequency component or a magnetron component. The radio frequency component comprises a first antenna and a radio frequency module, and the radio frequency module can emit microwaves when it is started. The first antenna can feed the microwaves into the cavity 14 to heat the food. The magnetron component can include a magnetron and a waveguide structure, and the waveguide structure connects the magnetron and the cavity. The waveguide structure can transmit the microwaves emitted by the magnetron into the cavity 14 to heat the food.

[0094] In one embodiment, the microwave cooking appliance 100 comprises two types of microwave generating modules 12, which comprise radio frequency components and magnetron components. Specifically, in some low-power heating application scenarios (such as thawing), the radio frequency module can be turned on, and the magnetron can be turned off, so that smaller power microwaves are fed into the cavity 14 through the first antenna to heat the food in the cavity 14. In some high-power heating application scenarios, the magnetron can be turned on, and the radio frequency module can be turned off, so that larger power microwaves are input into the cavity 14 through the waveguide structure to heat the food in the cavity 14. It can be understood that in some application scenarios, the radio frequency module and the magnetron can be turned on at the same time or alternately, and the present application does not make specific limitations thereon. That is, the microwave cooking appliance 100 can combine the extreme thawing, zoned heating, and low-temperature cooking of the radio frequency heating technology with the rapid reheating and micro-baking of the magnetron heating technology and apply them to the cooking appliance at the same time, so that the cooking effects are complementary and the best combination is achieved.

[0095] The present application does not make specific limitations on the installation position of the first antenna. Alternatively, the first antenna can be installed at the top and / or bottom of the cavity 14. The number of antennas can be one or more. Alternatively, the microwave generating module 12 can be installed at the top or bottom of the cavity 14.

[0096] The control module 18 is used to control the microwave generating module 12 to start to output microwave power, and to receive the detection signal returned by the microwave detection module 20. The microwave generating module 12 is electrically connected with the control module 18, for receiving the control signal sent by the control module 18, generating corresponding microwave power, and feeding the microwave power into the cavity 14.

[0097] The microwave cooking appliance 100 can further comprise an input component, and the control module 18 can be electrically connected with the input component, which comprises but is not limited to a button, a knob, a touch screen, a voice component, etc. After the microwave cooking appliance 100 is powered on, the user can set a cooking program or a cooking parameter by using the input component. After the cooking program or the cooking parameter is set, the user can input a start instruction by using the input component, and the control module 18 can control the microwave generating module 12 to start to output microwaves after receiving the start instruction.

[0098] The microwave detection module 20 can be electrically connected with the control module 18. When the microwave cooking appliance 100 is manufactured, an instrument can be used to test the microwave radiation of the microwave cooking appliance 100 to determine the position from which the cavity 14 radiates microwave signals. Alternatively, the microwave detection module 20 can detect the microwave signals radiated by the cavity 14 through the position at which the cavity 14 radiates the strongest microwave signals. The microwave detection module 20 returns the detected detection signal to the control module 18.

[0099] The cavity 14 is connected with the microwave generating module 12 and the microwave detecting module 20, and is used to place a load (such as food) to be heated, receive the microwave power output by the microwave generating module 12 to heat the load, and meanwhile, the microwave signal radiated in the working process is detected by the microwave detecting module 20. Specifically, the cavity 14 is provided with a cooking chamber, food can be placed in the cooking chamber, and the microwave fed into the cooking chamber can heat the food. The microwave cooking appliance 100 can further include a door body, one side of the cavity 14 is provided with an opening communicating with the cooking chamber, and the door body is rotatably connected with the cavity 14 to open and close the opening, thereby facilitating the user to take and place food.

[0100] Due to the differences between different microwave cooking appliances 100 and the differences between the same microwave cooking appliance 100 in different starting times, there is a certain time difference between the start of the microwave generating module 12 and the reception of the microwave signal (detection signal) radiated by the cavity 14 by the control module 18. In the embodiment, the control module 18 continuously acquires the microwave signal within a first preset time period after receiving the microwave signal radiated by the cavity 14, so as to acquire the first characteristic value in the current state of the microwave cooking appliance 100 according to the microwave signal. Compared with the pre-set characteristic value scheme, the microwave cooking appliance 100 of the embodiment can judge the no-load state after each start of the microwave generating module 12, so as to adaptively adjust the no-load parameter (first characteristic value) after each start of the microwave generating module 12, thereby improving the accuracy of the no-load judgment.

[0101] Within the first preset time period after receiving the microwave signal radiated by the cavity 14, the power of the microwave generating module 12 rises, and the first characteristic value in the loaded state (which can refer to the state that food is placed in the cooking chamber) and the first characteristic value in the no-load state (which can refer to the state that no food is placed in the cooking chamber) are not much different.

[0102] Within a second preset time period after the first preset time period, the power of the microwave generating module 12 rises to a certain extent, a part of the microwave is absorbed by the load in the loaded state, the second characteristic value is small, the second characteristic value in the no-load state becomes large, and the second characteristic value in the loaded state and the second characteristic value in the no-load state are greatly different. Therefore, in the case that the second characteristic value is less than or equal to the first characteristic value, it can be determined that the microwave cooking appliance 100 is in the loaded state. In the case that the second characteristic value is greater than the first characteristic value, it can be determined that the microwave cooking appliance 100 is in the no-load state, and the control module 18 can control the microwave generating module 12 to be closed or to reduce the power, thereby avoiding or alleviating the damage of the microwave cooking appliance 100 caused by the no-load to a certain extent. The amplitude of the reduced power can be specifically determined according to the actual requirement, which is not limited in the present application.

[0103] It can be understood that the first preset time length used for judging the idle state after each start of the microwave generating module 12 can be the same or different. The second preset time length used can be the same or different.

[0104] Optionally, before the microwave generating module 12 is controlled to start, the microwave cooking appliance 100 can be powered on. The control module 18 can control the microwave generating module 12 to output microwave power.

[0105] In some embodiments, referring to FIG. 3, the microwave detecting module 20 includes a conversion circuit 22 and an adjusting circuit 24. The conversion circuit 22 is electrically connected to the adjusting circuit 24. The conversion circuit 22 is configured to receive the microwave signal radiated by the cavity 14 and convert the microwave signal into a voltage signal. The adjusting circuit 24 is configured to adjust the size of the voltage signal, and the voltage signal represents the first characteristic value and the second characteristic value.

[0106] In this way, the microwave can be converted into a signal recognizable by the control module 18.

[0107] Specifically, the conversion circuit 22 can receive the microwave signal radiated by the cavity 14. The conversion circuit 22 converts the microwave signal into a voltage signal. The voltage signal can be returned to the control module 18.

[0108] The adjusting circuit 24 can adjust the size of the voltage signal, so that the control module 18 can better use the voltage signal. For example, the voltage signal converted by the conversion circuit 22 can be amplified by the design of the adjusting circuit 24, so that the amplified voltage signal is returned to the control module 18.

[0109] In some embodiments, referring to FIG. 3, the conversion circuit 22 includes the antenna 16, a first capacitor C1, and a diode D1. The first capacitor C1 is connected between the antenna 16 and the anode of the diode D1. The adjusting circuit 24 includes a second capacitor C2 and a resistor R. The second capacitor C2 and the resistor R are connected in parallel. One end of the second capacitor C2 and the resistor R connected in parallel is connected to the cathode of the diode D1, and the other end is connected to a ground terminal.

[0110] In this way, the circuit design is simple and the cost is low.

[0111] Specifically, the antenna 16 is configured to receive the microwave signal radiated by the cavity 14. The first capacitor C1 can be used as a DC blocking capacitor to block direct current and pass alternating current. The diode D1 can be used as a detector to convert the microwave signal into a voltage signal Vout.

[0112] The second capacitor C2 and the resistor R can be used to adjust the size of the voltage signal Vout. Optionally, when the capacitance value of the second capacitor C2 and / or the resistance value of the resistor R increases, the voltage signal increases.

[0113] Optionally, the control module 18 can comprise an analog-to-digital conversion (ADC) sampling module, and the voltage signal Vout output by the microwave detection module 20 can be input to the ADC sampling module for use.

[0114] Optionally, the microwave detection module 20 can comprise a processing circuit for processing the voltage signal Vout output by the adjustment circuit 24, the processing circuit comprising but not limited to an operational amplifier, a comparator, a digital-to-analog converter (DAC), etc., so that the control module 18 can better use the voltage signal.

[0115] Optionally, when the microwave generation module 12 comprises a radio frequency module and a first antenna, the antenna 16 can be the first antenna, i.e., the microwave detection module 20 can receive the microwave signal radiated by the cavity 14 through the first antenna of the radio frequency link. Alternatively, when the microwave generation module 12 comprises a radio frequency module and a first antenna, the antenna 16 can be another antenna different from the first antenna.

[0116] In some embodiments, the first characteristic value is obtained by analyzing the microwave signal, and the analysis comprises at least one of summation, averaging, and mean square deviation. The second characteristic value is obtained by analyzing the microwave signal, and the analysis comprises at least one of summation, averaging, and mean square deviation.

[0117] In this way, the first characteristic value and the second characteristic value can be more accurate.

[0118] Specifically, in one embodiment, the first characteristic value and the second characteristic value are obtained by summation analysis of the microwave signal. Within the first predetermined time length and the second predetermined time length, respectively, the detection signal returned by the microwave detection module 20 can be read once every certain period, so that a plurality of detection signals can be obtained within the first predetermined time length and the second predetermined time length, and the first characteristic value and the second characteristic value can be obtained by summing the plurality of detection signals.

[0119] In one embodiment, the first characteristic value and the second characteristic value are obtained by averaging analysis of the microwave signal. Within the first predetermined time length and the second predetermined time length, respectively, the detection signal returned by the microwave detection module 20 can be read once every certain period, so that a plurality of detection signals can be obtained within the first predetermined time length and the second predetermined time length, and the first characteristic value and the second characteristic value can be obtained by averaging the plurality of detection signals.

[0120] In one embodiment, the first characteristic value and the second characteristic value are obtained by mean square error analysis on the microwave signal. The detection signal returned by the microwave detection module 20 can be read every certain period within the first preset time length and the second preset time length, respectively, so that a plurality of detection signals can be obtained within the first preset time length and the second preset time length, and the first characteristic value and the second characteristic value can be obtained by mean square error analysis on the plurality of detection signals.

[0121] In one embodiment, each of the first preset time length and the second preset time length can be divided into two time lengths, a first average value is obtained by average analysis on the plurality of detection signals within the first time length, and a second average value is obtained by average analysis on the plurality of detection signals within the second time length, and the first characteristic value and the second characteristic value are obtained by mean square error analysis or summation analysis on the first average value and the second average value.

[0122] The analysis methods of other embodiments will not be described in detail one by one, and can be implemented according to the above analysis.

[0123] Optionally, the analysis methods of the first characteristic value and the second characteristic value are the same. Optionally, the first preset time length and the second preset time length are the same.

[0124] In some embodiments, the first preset time length ranges from 2s to 5s, and the second preset time length ranges from 2s to 5s.

[0125] In this way, a specific time length can be selected.

[0126] Specifically, the first preset time length is t1, and the first preset time length ranges from 2s to 5s, that is, 2s≤t1≤5s. In some examples, t1=2s, 2.5s, 3s, 3.5s, 4s, 4.5s, 5s, or other values of [2s, 5s].

[0127] The second preset time length is t2, and the second preset time length ranges from 2s to 5s, that is, 2s≤t2≤5s. In some examples, t2=2s, 2.5s, 3s, 3.5s, 4s, 4.5s, 5s, or other values of [2s, 5s].

[0128] Optionally, to improve the accuracy of the no-load judgment, the first preset time length and the second preset time length are the same, for example, the first preset time length and the second preset time length are both 5s (seconds), after the control module 18 receives the detection signal returned by the microwave detection module 20, the control module 18 starts timing, within the first 5s (first preset time length), the first characteristic value is obtained, within the second 5s (second preset time length), the second characteristic value is obtained, and by comparing the first characteristic value and the second characteristic value, whether the microwave cooking appliance 100 is in the no-load state can be determined.

[0129] In some embodiments, the control method comprises: controlling the microwave cooking appliance 100 to issue an empty-load prompt information in the case that the microwave cooking appliance 100 is in an empty-load state.

[0130] The control method of the embodiments of the present application can be implemented by the microwave cooking appliance 100 of the embodiments of the present application, in particular, the control module 18 is configured to control the microwave cooking appliance 100 to issue an empty-load prompt information in the case that the microwave cooking appliance 100 is in an empty-load state.

[0131] Therefore, the user can be prompted in time.

[0132] In particular, please refer to FIG. 4, optionally, the microwave cooking appliance 100 can comprise a prompt component 26, the control module 18 is electrically connected to the prompt component 26, and the prompt component 26 comprises but is not limited to a display screen, a loudspeaker, an indicator light, a buzzer, etc.

[0133] In one embodiment, the prompt component 26 comprises a display screen. In the case that the microwave cooking appliance 100 is in an empty-load state, the control module 18 can control the display screen to display corresponding text, patterns, graphics, etc. to issue an empty-load prompt information, for example, control the display screen to display “the appliance is in an empty-load state, please check” or similar text.

[0134] In one embodiment, the prompt component 26 comprises a loudspeaker. In the case that the microwave cooking appliance 100 is in an empty-load state, the control module 18 can control the loudspeaker to play corresponding voice to issue an empty-load prompt information, for example, control the loudspeaker to play “the appliance is in an empty-load state, please check” or similar voice.

[0135] In one embodiment, the prompt component 26 comprises an indicator light. In the case that the microwave cooking appliance 100 is in an empty-load state, the control module 18 can control the indicator light to emit corresponding light to issue an empty-load prompt information, for example, control the indicator light to flash.

[0136] In one embodiment, the prompt component 26 comprises a buzzer. In the case that the microwave cooking appliance 100 is in an empty-load state, the control module 18 can control the buzzer to emit corresponding prompt sound to issue an empty-load prompt information, for example, control the buzzer to emit “tickle, tickle, tickle” sound or similar sound.

[0137] Optionally, in an embodiment, the microwave cooking appliance 100 can comprise a communication module 28, the control module 18 is electrically connected to the communication module 28, the control module 18 can send the no-load prompt information to a terminal device through the communication module 28, and the terminal device can push the no-load prompt information. The terminal device includes but is not limited to a mobile phone, a tablet computer, a personal computer, a wearable smart device, etc. The communication module 28 and the terminal device can be communicatively connected through a mode including but not limited to Bluetooth, WIFI, a mobile communication network, etc.

[0138] Optionally, the step of controlling the microwave cooking appliance 100 to send the no-load prompt information can be performed in step 07 or after step 07.

[0139] In some embodiments, referring to FIG. 5, the control method comprises:

[0140] 09, in the case where the second characteristic value is less than or equal to the first characteristic value, determining that the microwave cooking appliance 100 is in a loaded state and controlling the microwave generating module 12 to maintain the current state.

[0141] Thus, the microwave generating module 12 can be maintained in the current state in the case where the microwave cooking appliance 100 is in the loaded state.

[0142] Specifically, the loaded state can refer to a state in which food is placed in the cooking chamber. In the loaded state, most of the microwaves emitted by the microwave generating module 12 can be absorbed by the food, and thus the second characteristic value in the second preset time length will be less than or equal to the first characteristic value in the first preset time length.

[0143] In the case where it is determined that the microwave cooking appliance 100 is in the loaded state, the control module 18 can control the microwave generating module 12 to maintain the current state, for example, to control the microwave generating module 12 to operate at a power and a phase corresponding to the set cooking program, so as to complete the cooking program.

[0144] A microwave cooking appliance 100 according to an embodiment of the present application comprises a processor 30, a memory 32, and a computer program stored in the memory 32 and executable on the processor 30, the computer program being executed by the processor 30 to implement the steps of the control method according to any of the above embodiments.

[0145] Optionally, in the embodiment shown in FIG. 2, the control module 18 can comprise a processor 30 and a memory 32.

[0146] The present embodiment provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, the computer program is executed by the processor 30 to implement the steps of the control method according to any of the above embodiments.

[0147] For example, the control method implemented when the computer program is executed by the processor 30 comprises:

[0148] 01, controlling the microwave generating module 12 to start to emit microwaves into the cavity 14;

[0149] 03, within a first preset time length after receiving the microwave signal radiated by the cavity 14, obtaining a first characteristic value in the current state of the microwave cooking appliance 100 according to the microwave signal;

[0150] 05, within a second preset time length after the first preset time length, obtaining a second characteristic value in the current state of the microwave cooking appliance 100 according to the microwave signal;

[0151] 07, in the case where the second characteristic value is greater than the first characteristic value, determining that the microwave cooking appliance 100 is in an empty load state and controlling the microwave generating module 12 to turn off or reduce power.

[0152] It should be noted that the above explanation and advantages of the control method of the microwave cooking appliance 100 and the embodiments of the microwave cooking appliance 100 also apply to the microwave cooking appliance 100 and the computer readable storage medium of the embodiments of the present application, and to avoid redundancy, they will not be described in detail here.

[0153] In addition, in the related art, the microwave cooking appliance can use the microwaves emitted by the microwave source to heat the food. However, during the operation of the microwave cooking appliance, the phenomenon of sparking may occur, and the persistence of the sparking phenomenon will cause certain danger to the microwave cooking appliance and the user.

[0154] Please refer to FIG. 6 and FIG. 7, the embodiments of the present application provide a control method of a microwave cooking appliance 100, the microwave cooking appliance 100 comprises a microwave generating module 12 and a heating chamber 140, the microwave generating module 12 is used to emit microwaves to the heating chamber 140, the control method comprises:

[0155] 001, controlling the microwave generating module 12 to start to emit microwaves into the heating chamber 140;

[0156] 003, obtaining a microwave signal value radiated by the heating chamber 140;

[0157] 005, in the case where the microwave signal value is greater than a preset sparking characteristic value, determining that the microwave cooking appliance 100 is in a sparking state and controlling the microwave generating module 12 to turn off.

[0158] The control method of the embodiment of the application can be implemented by the microwave cooking appliance 100 of the embodiment of the application. Specifically, referring to FIG. 7, the microwave cooking appliance 100 comprises a control module 18, a microwave generating module 12, a microwave detecting module 20 and a heating chamber 140, the control module 18 is electrically connected to the microwave generating module 12 and the microwave detecting module 20, the microwave generating module 12 is configured to emit microwaves into the heating chamber 140, and the microwave detecting module 20 is configured to detect a microwave signal value radiated by the heating chamber 140.

[0159] The control module 18 is configured to:

[0160] control the microwave generating module 12 to start to emit microwaves into the heating chamber 140;

[0161] acquire, by the microwave detecting module 20, the microwave signal value radiated by the heating chamber 140;

[0162] in a case where the microwave signal value is greater than a preset sparking characteristic value, determine that the microwave cooking appliance 100 is in a sparking state and control the microwave generating module 12 to stop.

[0163] The control method of the microwave cooking appliance 100 and the microwave cooking appliance 100 described above, in a case where it is determined that the microwave cooking appliance 100 is in a sparking state, the microwave generating module 12 can be controlled to stop, so that the danger of the microwave cooking appliance 100 and the user caused by the sparking of the microwave cooking appliance 100 can be avoided or alleviated to a certain extent.

[0164] Specifically, the microwave cooking appliance 100 includes but is not limited to a microwave steaming and baking all-in-one machine, an integrated stove, a microwave oven, a microwave oven, etc. The microwave cooking appliance 100 comprises a cavity, and the cavity is provided with a heating chamber 140, and food can be placed in the heating chamber 140. The microwaves emitted by the microwave generating module 12 can be fed into the heating chamber 140 to heat the food.

[0165] Optionally, in an embodiment, the microwave generating module 12 comprises a magnetron and a waveguide structure, the waveguide structure is connected to the magnetron and the cavity, and the waveguide structure can transmit the microwaves emitted by the magnetron into the heating chamber 140 to heat the food.

[0166] Optionally, in an embodiment, the microwave generating module 12 comprises a radio frequency module and a first antenna, the first antenna is connected to the radio frequency module and the cavity, and the first antenna can transmit the microwaves emitted by the radio frequency module into the heating chamber 140 to heat the food.

[0167] In the use of the microwave cooking appliance 100, if improper use occurs, a sparking phenomenon will occur in the heating chamber 140. The continuous sparking phenomenon will damage the microwave cooking appliance 100, and even cause danger to the user. The improper use includes but is not limited to the case that the microwave cooking appliance 100 is in an empty load state, and the case that the microwave generating module 12 is started after a metal object is placed in the heating chamber 140. The case that the microwave cooking appliance 100 is in an empty load state can refer to the case that no load (such as food) is placed in the heating chamber 140.

[0168] When the microwave cooking appliance 100 is manufactured, an instrument can be used to test the microwave radiation of the microwave cooking appliance 100 to determine the position of the microwave signal radiated by the heating chamber 140. Alternatively, the microwave detection module 20 can detect the size of the microwave signal radiated by the heating chamber 140 through the position where the microwave signal radiated by the heating chamber 140 is the strongest, and form a microwave signal value radiated by the heating chamber 140.

[0169] The preset sparking feature value is a value that can be calibrated and stored in advance through simulation and other tests. During the test, the sparking condition in the heating chamber 140 is simulated, so that the sparking feature value is obtained through the microwave detection module 20. The preset sparking feature value can be stored in the control module 18 or other components of the microwave cooking appliance 100.

[0170] The control module 18 is electrically connected to the microwave generating module 12 and the microwave detection module 20, and the control module 18 can control the opening and closing of the microwave generating module 12. After the microwave cooking appliance 100 is powered on, when a start cooking instruction is received, the control module 18 can control the microwave generating module 12 to be turned on to emit microwaves to the heating chamber 140. When the cooking time is over, the control module 18 can control the microwave generating module 12 to be turned off.

[0171] During the cooking process, the control module 18 can obtain the microwave signal value radiated by the heating chamber 140 through the microwave detection module 20. The control module 18 can compare the microwave signal value with the preset sparking feature value. In the case that the microwave signal value radiated by the heating chamber 140 is greater than the preset sparking feature value, the control module 18 can determine that the microwave cooking appliance 100 is in a sparking state, and control the microwave generating module 12 to be turned off, so that the microwave generating module 12 stops emitting microwaves to the heating chamber 140, thereby avoiding or alleviating the danger of the microwave cooking appliance 100 and the user caused by the sparking of the microwave cooking appliance 100 to a certain extent.

[0172] In some embodiments, referring to FIG. 10, step 003 includes:

[0173] 031, sampling a plurality of microwave signal values within a preset time length;

[0174] 033, processing the plurality of microwave signal values to obtain a comparison value;

[0175] Step 005 comprises:

[0176] 051, in the case that the comparison value is greater than the preset sparking characteristic value, determining that the microwave cooking appliance 100 is in a sparking state and controlling the microwave generating module 12 to be closed.

[0177] The control method of the embodiment of the application can be implemented by the microwave cooking appliance 100 of the embodiment of the application. Specifically, referring to FIG. 7, the control module 18 is configured to: sample a plurality of microwave signal values within a preset time length;

[0178] processing the plurality of microwave signal values to obtain a comparison value;

[0179] in the case that the comparison value is greater than the preset sparking characteristic value, determining that the microwave cooking appliance 100 is in a sparking state and controlling the microwave generating module 12 to be closed.

[0180] Therefore, the accuracy of determining that the microwave cooking appliance 100 is in a sparking state can be improved to some extent.

[0181] Specifically, during use of the microwave cooking appliance 100, there may be short-term interference factors that cause the microwave signal value radiated by the heating lamp 14 to be greater than the sparking characteristic value, resulting in a false determination that the microwave cooking appliance 100 is in a sparking state.

[0182] In the case that the comparison value is greater than the preset sparking characteristic value, determining that the microwave cooking appliance 100 is in a sparking state and controlling the microwave generating module 12 to be closed, thereby, by setting the preset time length, the false determination of the sparking state caused by certain interference factors can be excluded, and the accuracy of determining that the microwave cooking appliance 100 is in a sparking state can be improved to some extent.

[0183] The preset time length can be determined according to specific conditions (such as experience value or test). Alternatively, the preset time length T can be determined by N sampling time lengths t, i.e. the preset time length T = N x t, N is a natural number greater than 1. The control module 18 can sample a microwave signal value every other sampling time length. The N microwave signal values sampled are processed to obtain a comparison value. The comparison value is compared with the preset characteristic sparking value to determine whether the microwave cooking appliance 100 is in a sparking state.

[0184] Optionally, in an embodiment, an average of the N microwave signal values can be calculated as the comparison value. Optionally, in an embodiment, the maximum microwave signal value and the minimum microwave signal value can be removed from the N microwave signal values, and then an average of the remaining (N-2) microwave signal values can be calculated as the comparison value. For example, N=10, 10 microwave signal values can be sampled within a preset time period, the maximum microwave signal value and the minimum microwave signal value can be removed, and then an average of the remaining 8 microwave signal values can be calculated as the comparison value. In a case where the comparison value is greater than the preset sparking feature value, the control module 18 controls the microwave generating module 12 to be turned off.

[0185] In some embodiments, the preset sparking feature value is an average of a plurality of sparking feature values obtained during a sparking test of the microwave cooking appliance 100.

[0186] In this way, the accuracy of determining that the microwave cooking appliance 100 is in a sparking state can be improved to some extent.

[0187] Specifically, the preset sparking feature value can be pre-calibrated and stored by testing the microwave cooking appliance 100 multiple times. Each time the microwave cooking appliance 100 is tested for sparking, a corresponding sparking feature value can be obtained. After multiple sparking tests, a plurality of sparking feature values can be obtained. An average of the plurality of sparking feature values can be calculated as the preset sparking feature value and can be stored in the microwave cooking appliance 100. Compared to using a sparking feature value obtained from a single sparking test as the preset sparking feature value, calculating an average of a plurality of sparking feature values can effectively improve the accuracy of determining the sparking state and reduce false positives.

[0188] In some embodiments, the control method comprises:

[0189] In a case where the microwave cooking appliance 100 is in a sparking state, the microwave cooking appliance 100 is controlled to issue a sparking prompt information.

[0190] The control method of the embodiments of the present application can be implemented by the microwave cooking appliance 100 of the embodiments of the present application. Specifically, the control module 18 is configured to control the microwave cooking appliance 100 to issue a sparking prompt information in a case where the microwave cooking appliance 100 is in a sparking state.

[0191] In this way, the user can be prompted in time to check the status of the microwave cooking appliance 100.

[0192] Optionally, please refer to FIG. 9, the microwave cooking appliance 100 can comprise a prompting assembly 26, the prompting assembly 26 is electrically connected to the control module 18, and the prompting assembly 26 comprises but is not limited to a speaker, a buzzer, a display screen, an indicator light, etc.

[0193] In an embodiment, the prompting component 26 comprises a speaker. In the case that the microwave cooking appliance 100 is in the sparking state, the control module 18 can control the speaker to play corresponding voice to issue the sparking prompt information, for example, control the speaker to play "the appliance is sparking, please check" or similar voice.

[0194] In an embodiment, the prompting component 26 comprises a buzzer. In the case that the microwave cooking appliance 100 is in the sparking state, the control module 18 can control the buzzer to issue corresponding prompt sound to issue the sparking prompt information, for example, control the buzzer to issue "tut-tut-tut" sound or similar sound.

[0195] In an embodiment, the prompting component 26 comprises a display screen. In the case that the microwave cooking appliance 100 is in the sparking state, the control module 18 can control the display screen to display corresponding text, pattern, figure, etc. to issue the sparking prompt information, for example, control the display screen to display the text "the appliance is sparking, please check" or similar text.

[0196] In an embodiment, the prompting component 26 comprises an indicator light. In the case that the microwave cooking appliance 100 is in the sparking state, the control module 18 can control the indicator light to issue corresponding light to issue the sparking prompt information, for example, control the indicator light to flash or emit red light.

[0197] Optionally, in an embodiment, please refer to FIG. 9, the microwave cooking appliance 100 can comprise a communication module 28, the control module 18 is electrically connected to the communication module 28, and the control module 18 can send the sparking prompt information to a terminal device through the communication module 28, and the terminal device can push the sparking prompt information to the user. The terminal device includes but is not limited to mobile phone, tablet computer, personal computer, wearable smart device, etc. The communication module 28 and the terminal device can be connected through communication modes including but not limited to Bluetooth, WIFI, mobile communication network, etc.

[0198] Optionally, the step of controlling the microwave cooking appliance 100 to issue the sparking prompt information can be performed in step 005 or after step 005.

[0199] In some embodiments, please refer to FIG. 11, the control method comprises:

[0200] 007, in the case that the microwave signal value is less than or equal to the preset sparking characteristic value, controlling the microwave generating module 12 to keep the current state.

[0201] The control method of the embodiment of the present application can be realized by the microwave cooking appliance 100 of the embodiment of the present application. Specifically, please refer to FIG. 7, the control module 18 is used to control the microwave generating module 12 to keep the current state in the case that the microwave signal value is less than or equal to the preset sparking characteristic value.

[0202] Thus, the microwave generating module 12 can be kept in the current state when the microwave signal value is less than or equal to the preset sparking characteristic value.

[0203] Specifically, when the microwave signal value is less than or equal to the preset sparking characteristic value, the microwave cooking appliance 100 can be in a normal use condition, and the food is placed in the heating cavity 14. Most of the microwaves emitted by the microwave generating module 12 can be absorbed by the food, and then the microwave signal value radiated from the heating cavity 14 is small, and the microwave cooking appliance 100 is in a non-sparking state.

[0204] When it is determined that the microwave cooking appliance 100 is in the non-sparking state, the control module 18 can control the microwave generating module 12 to keep the current state, for example, to control the magnetron or the radio frequency module to operate at the power corresponding to the set cooking program, so as to complete the cooking program.

[0205] In some embodiments, referring to FIGS. 7 and 8, the microwave detection module 20 includes the antenna 16, the conversion circuit 22, and the adjustment circuit 24. The conversion circuit 22 is electrically connected to the antenna 16 and the adjustment circuit 24. The antenna 16 is configured to receive the microwave signal radiated from the heating cavity 14. The conversion circuit 22 is configured to convert the microwave signal received by the antenna 16 into a voltage signal. The adjustment circuit 24 is configured to adjust the size of the voltage signal, and the size of the voltage signal represents the microwave signal value.

[0206] Thus, the microwave signal can be converted into a signal recognizable by the control module 18.

[0207] Specifically, the antenna 16 can receive the microwave signal radiated from the heating cavity 14 and transmit the microwave signal to the conversion circuit 22. The conversion circuit 22 converts the microwave signal into a voltage signal. The voltage signal can be returned to the control module 18. The size of the voltage signal can represent the microwave signal value.

[0208] The adjustment circuit 24 can adjust the size of the voltage signal, so that the control module 18 can better use the voltage signal. For example, the voltage signal converted by the conversion circuit 22 can be amplified by the design of the adjustment circuit 24, so that the amplified voltage signal is returned to the control module 18.

[0209] Optionally, when the microwave generating module 12 includes the radio frequency module and the first antenna, the antenna 16 can be the first antenna, that is, the microwave detection module 20 can receive the microwave signal radiated from the heating cavity 14 through the first antenna of the radio frequency link. Alternatively, when the microwave generating module 12 includes the radio frequency module and the first antenna, the antenna 16 can be another antenna different from the first antenna.

[0210] In some embodiments, the conversion circuit 22 comprises a first capacitor C1 and a diode D1, the first capacitor C1 is connected between the antenna 16 and the positive electrode of the diode D1. The adjustment circuit 24 comprises a second capacitor C2 and a resistor R1, the second capacitor C2 and the resistor R1 are connected in parallel, one end of the second capacitor C2 and the resistor R1 connected in parallel is connected to the negative electrode of the diode D1, and the other end is connected to the ground terminal.

[0211] Thus, the conversion circuit 22 and the adjustment circuit 24 are simple in design and low in cost.

[0212] Specifically, the antenna 16 is used to receive the microwave signal radiated by the heating chamber 140. The first capacitor C1 can be used as a DC blocking capacitor to block DC and pass AC. The diode D1 can be used as a detector to convert the microwave signal into a voltage signal Vout.

[0213] The second capacitor C2 and the resistor R1 can be used to adjust the size of the voltage signal Vout. Alternatively, when the capacitance value of the second capacitor C2 and / or the resistance value of the resistor R1 increases, the voltage signal increases.

[0214] Alternatively, the control module 18 can comprise an analog-to-digital conversion (ADC) sampling module, and the voltage signal Vout output by the microwave detection module 20 can be input to the ADC sampling module for use.

[0215] Alternatively, the microwave detection module 20 can comprise a processing circuit for processing the voltage signal Vout output by the adjustment circuit 24, the processing circuit comprising but not limited to an operational amplifier, a comparator, a digital-to-analog converter (DAC), etc., so that the control module 18 can better use the voltage signal.

[0216] Please refer to FIG. 7, a microwave cooking appliance 100 according to an embodiment of the present application comprises a processor 30, a memory 32, and a computer program stored in the memory 32 and executable on the processor 30, the computer program is executed by the processor 30 to implement the steps of the control method of any of the above embodiments.

[0217] The embodiment of the present application provides a computer readable storage medium, the computer readable storage medium stores a computer program, the computer program is executed by the processor 30 to implement the steps of the control method of any of the above embodiments.

[0218] For example, the control method implemented by the computer program executed by the processor 30 comprises:

[0219] 001, controlling the microwave generating module 12 to start to emit microwaves to the heating chamber 140;

[0220] 003, obtaining the microwave signal value radiated by the heating chamber 140;

[0221] 005,In the case that the microwave signal value is greater than the preset sparking characteristic value, it is determined that the microwave cooking appliance 100 is in the sparking state and the microwave generating module 12 is controlled to be closed.

[0222] It should be noted that the above explanations and advantages of the control method of the microwave cooking appliance 100 and the embodiments of the microwave cooking appliance 100 also apply to the microwave cooking appliance 100 and the computer readable storage medium of the embodiments of the present application, and for the sake of avoiding redundancy, they will not be described in detail here.

[0223] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0224] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A control method of a microwave cooking appliance, characterized in that, The microwave cooking appliance comprises a microwave generating module and a cavity, the microwave generating module is used for emitting microwaves into the cavity, and the control method comprises: controlling the microwave generating module to start to emit microwaves into the cavity; receiving a microwave signal radiated by the cavity; acquiring a first characteristic value of the microwave cooking appliance in a current state according to the microwave signal within a first preset time period after the microwave signal is received; acquiring a second characteristic value of the microwave cooking appliance in the current state according to the microwave signal within a second preset time period after the first preset time period; 2. The control method according to claim 1, characterized by, determining that the microwave cooking appliance is in an empty load state and controlling the microwave generating module to be closed or to reduce power in a case where the second characteristic value is greater than the first characteristic value. The first characteristic value is acquired by analyzing the microwave signal, and the analysis comprises at least one of summation, averaging, and mean square deviation.

3. The control method according to claim 1 or 2, characterized by, The second characteristic value is acquired by analyzing the microwave signal, and the analysis comprises at least one of summation, averaging, and mean square deviation.

4. The control method according to any one of claims 1 to 3, characterized by, The first preset time period ranges from 2s to 5s, and the second preset time period ranges from 2s to 5s. The control method comprises:

5. The control method according to any one of claims 1 to 4, characterized by, controlling the microwave cooking appliance to issue an empty load prompt information in a case where the microwave cooking appliance is in the empty load state. The control method comprises:

6. A microwave cooking appliance, characterized in that, determining that the microwave cooking appliance is in a loaded state and controlling the microwave generating module to remain in a current state in a case where the second characteristic value is less than or equal to the first characteristic value. The microwave cooking appliance comprises a control module, a microwave generating module, a microwave detecting module, and a cavity, the control module is electrically connected to the microwave generating module and the microwave detecting module, the microwave generating module is used for emitting microwaves into the cavity, and the microwave detecting module is used for detecting a microwave signal radiated by the cavity; The control module is used for controlling the microwave generating module to start to emit microwaves into the cavity. The control module is used for acquiring a first characteristic value of the microwave cooking appliance in a current state according to the microwave signal within a first preset time period after the microwave signal is received. The control module is used for acquiring a second characteristic value of the microwave cooking appliance in the current state according to the microwave signal within a second preset time period after the first preset time period.

7. The microwave cooking appliance according to claim 6, characterized in that, The control module is used for determining that the microwave cooking appliance is in an empty load state and controlling the microwave generating module to be closed or to reduce power in a case where the second characteristic value is greater than the first characteristic value.

8. The microwave cooking appliance according to claim 7, characterized in that, The microwave detecting module comprises a conversion circuit and an adjusting circuit, the conversion circuit is electrically connected to the adjusting circuit, the conversion circuit is used for receiving the microwave signal radiated by the cavity and converting the microwave signal into a voltage signal, and the adjusting circuit is used for adjusting the size of the voltage signal, and the voltage signal represents the first characteristic value and the second characteristic value. The conversion circuit comprises an antenna, a first capacitor, and a diode, the first capacitor is connected between the antenna and the anode of the diode; The adjusting circuit comprises a second capacitor and a resistor, the second capacitor and the resistor are connected in parallel, one end of the second capacitor and the resistor connected in parallel is connected to the negative electrode of the diode, and the other end is connected to the ground terminal.

9. Microwave cooking appliance according to any of the claims 6-8, characterized in that, The first preset time length ranges from 2s to 5s, and / or the second preset time length ranges from 2s to 5s.

10. Microwave cooking appliance according to any of the claims 6-9, characterized in that, The control module is configured to control the microwave cooking appliance to issue an empty load prompt information in the case that the microwave cooking appliance is in an empty load state.

11. A control method of a microwave cooking appliance, characterized in that, The microwave cooking appliance comprises a microwave generating module and a heating chamber, the microwave generating module is configured to emit microwaves to the heating chamber, and the control method comprises: controlling the microwave generating module to start to emit microwaves to the heating chamber; acquiring a microwave signal value radiated by the heating chamber; in the case that the microwave signal value is greater than a preset sparking characteristic value, determining that the microwave cooking appliance is in a sparking state and controlling the microwave generating module to be closed.

12. The control method according to claim 11, characterized by, acquiring a microwave signal value radiated by the heating chamber comprises: sampling a plurality of microwave signal values within a preset time length; processing a plurality of microwave signal values to acquire a comparison value; in the case that the comparison value is greater than the preset sparking characteristic value, determining that the microwave cooking appliance is in a sparking state and controlling the microwave generating module to be closed. The preset sparking characteristic value is an average value of a plurality of sparking characteristic values acquired by the heating chamber during a sparking test of the microwave cooking appliance.

13. The control method according to claim 11 or 12, characterized by, The control method comprises:

14. The control method according to any one of claims 11 to 13, characterized by, controlling the microwave cooking appliance to issue a sparking prompt information in the case that the microwave cooking appliance is in a sparking state. The control method comprises:

15. The control method according to any one of claims 11 to 14, characterized by, controlling the microwave generating module to maintain a current state in the case that the microwave signal value is less than or equal to the preset sparking characteristic value. The control module is electrically connected to the microwave generating module and the microwave detecting module, the microwave generating module is configured to emit microwaves to the heating chamber, and the microwave detecting module is configured to detect a microwave signal value radiated by the heating chamber; 16. A microwave cooking appliance, characterized in that, the control module is configured to: control the microwave generating module to start to emit microwaves to the heating chamber; acquire the microwave signal value radiated by the heating chamber through the microwave detecting module; in the case that the microwave signal value is greater than a preset sparking characteristic value, determine that the microwave cooking appliance is in a sparking state and control the microwave generating module to be closed. the control module is configured to:

17. The microwave cooking appliance according to claim 16, characterized in that, sample a plurality of microwave signal values within a preset time length; process a plurality of microwave signal values to acquire a comparison value; in the case that the comparison value is greater than the preset sparking characteristic value, determine that the microwave cooking appliance is in a sparking state and control the microwave generating module to be closed. ​ 18. Microwave cooking appliance according to claim 16 or 17, characterized in that, The microwave detection module comprises an antenna, a conversion circuit and an adjusting circuit, the conversion circuit is electrically connected with the antenna and the adjusting circuit, the antenna is used for receiving the microwave signal radiated by the heating chamber, the conversion circuit is used for converting the microwave signal received by the antenna into a voltage signal, and the adjusting circuit is used for adjusting the size of the voltage signal, and the size of the voltage signal represents the value of the microwave signal.

19. The microwave cooking appliance according to claim 18, characterized in that, The conversion circuit comprises a first capacitor and a diode, and the first capacitor is connected between the antenna and the anode of the diode. The adjusting circuit comprises a second capacitor and a resistor, the second capacitor and the resistor are connected in parallel, one end of the parallel connection of the second capacitor and the resistor is connected to the cathode of the diode, and the other end is connected to a ground terminal.

20. A microwave cooking appliance characterized in that, The computer program is stored on the memory and can be run on the processor, and when the computer program is executed by the processor, the steps of the control method in any one of claims 1-5 or any one of claims 11-15 are implemented.

21. A computer-readable storage medium, characterized in that, The computer program is stored on the memory and can be run on the processor, and when the computer program is executed by the processor, the steps of the control method in any one of claims 1-5 or any one of claims 11-15 are implemented.

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