CN117320209A - Microwave cooking appliance, control method, solid source and storage medium - Google Patents

Abstract

The application discloses a microwave cooking appliance, a control method, a solid source and a storage medium. The control method of the microwave cooking utensil comprises the following steps: after initialization, the solid source serial data is read and preliminary processing is performed on the serial data to obtain commands including setting the frequency, phase and power of microwaves. Controlling the operation of the solid source to emit microwaves into the cavity according to the command; and in the running process of the solid source, collecting parameter information fed back by the solid source to execute a protection strategy and a power closed-loop control strategy until food cooking is completed. In the control method, the solid source is used as the microwave signal source, and the frequency, the phase and the power of the solid source can be set in a digital control mode, so that the application of various scenes of the microwave cooking appliance is realized, and the cooking demands of people are met.

Description

Microwave cooking appliance, control method, solid source and storage medium

Technical Field

The application relates to the technical field of cooking appliances, in particular to a microwave cooking appliance, a control method, a solid source and a storage medium.

Background

With the improvement of life quality and the upgrading of consumption, microwave oven products only providing heating performance cannot meet the demands of consumers. In addition to the basic properties of the products, consumers are increasingly focusing on the quality of cooking, and there is an urgent need to preserve the nutritional ingredients as well as color, aroma and taste of the food materials as much as possible during the cooking process of the food products, which is a need for high quality nutritional cooking. The existing microwave cooking appliance is a microwave oven or a combined cooking appliance based on a magnetron, the indexes such as frequency, phase and the like are not regulated, the output power of the magnetron is controlled only by regulating a frequency converter at present, the regulating range is limited, and the cooking requirement of people cannot be met.

Disclosure of Invention

The embodiment of the application provides a microwave cooking appliance, a control method, a solid source and a storage medium.

The control method of the microwave cooking appliance in the embodiment of the application comprises the following steps:

after initialization, the solid source serial data is read and preliminary processing is performed on the serial data to obtain commands including setting the frequency, phase and power of microwaves.

Controlling the operation of the solid source to emit microwaves into the cavity according to the command;

and in the running process of the solid source, collecting parameter information fed back by the solid source to execute a protection strategy and a power closed-loop control strategy until food cooking is completed.

In the control method, the solid source is used as the microwave signal source, and the frequency, the phase and the power of the solid source can be set in a digital control mode, so that the application of various scenes of the microwave cooking appliance is realized, and the cooking demands of people are met.

In some embodiments, after initialization, reading the solid state source serial data and performing preliminary processing on the serial data to obtain commands including setting the frequency, phase and power of microwaves, including:

and under the condition that the solid source buffer area has data and the data is complete data, performing preliminary processing on the read data to acquire the command.

In certain embodiments, the control method comprises:

and under the condition that corresponding feedback data is obtained according to the command, replying the feedback data to the main control board through the solid source serial port.

In certain embodiments, the control method comprises:

judging whether the data reception is overtime or not under the condition that the solid source buffer area has data and the data is incomplete data;

if the receiving has no timeout, judging whether the buffer area has data or not again;

and under the condition of overtime reception, resetting the receiving state of the solid source, and returning to judging whether the buffer zone has data.

In some embodiments, the protection strategy includes at least one of transmit power protection, reflected power protection, over-temperature protection, no communication protection;

the emission power protection comprises turning off microwave emission of the solid state source if the microwave emission power of the solid state source is greater than a first power threshold;

the reflected power protection includes turning off microwave emissions from the solid state source if the microwave reflected power of the solid state source is greater than a second power threshold;

the over-temperature protection includes turning off microwave emissions from the solid state source if the temperature of the solid state source is greater than a temperature threshold;

the communication-free protection includes turning off microwave emission of the solid state source in case of abnormal communication between the solid state source and a main control board of the microwave cooking appliance.

In certain embodiments, the power closed loop control strategy comprises:

detecting the microwave emission power of the solid source;

and under the condition that the microwave transmitting power is not equal to the target power, adjusting the microwave transmitting power of the solid source until the microwave transmitting power is equal to the target power.

In some embodiments, adjusting the microwave transmit power of the solid state source until the microwave transmit power is equal to the target power, where the microwave transmit power is not equal to the target power, comprises:

and under the condition that the microwave transmitting power is not equal to the target power, calculating a compensation value of the digital-to-analog converter of the solid-state source, correcting the microwave transmitting power, delaying for a preset time length, adding one to the numerical value of the counter, and re-detecting the microwave transmitting power until the microwave transmitting power is equal to the target power, or the numerical value accumulated by the counter exceeds a frequency threshold.

In certain embodiments, the power closed loop control strategy comprises:

detecting the microwave reflected power of the solid source under the condition that the microwave transmitted power is equal to the target power;

determining a food state in the cavity according to the microwave emission power;

and controlling the operation of the solid source according to the food state.

The solid state source of the embodiment of the application is used for a microwave cooking appliance, and comprises a processor and a memory, wherein the memory stores a computer program, and the computer program realizes the steps of the control method of the microwave cooking appliance in any embodiment when the computer program is executed by the processor.

The embodiment of the application provides a microwave cooking utensil, which comprises:

a main control board;

the solid source is connected with the main control board,

the main control board is used for setting the frequency, the phase and the power of the microwaves and sending corresponding commands to the solid source.

Embodiments of the present application provide a computer-readable storage medium having a computer program stored thereon, which when executed by a processor, implements the steps of the control method of the microwave cooking appliance of any of the above embodiments.

In the solid-state source, the microwave cooking utensil and the storage medium, the solid-state source is used as the microwave signal source, the frequency, the phase and the power of the solid-state source can be set in a digital control mode, the application of various scenes of the microwave cooking utensil is realized, and the cooking demands of people are met.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a flow chart of a control method of a microwave cooking appliance according to an embodiment of the present application;

fig. 2 is a schematic block diagram of a microwave cooking appliance according to an embodiment of the present application;

fig. 3 is another flow chart of a control method of the microwave cooking appliance according to the embodiment of the present application;

fig. 4 is a schematic flow chart of a control method of the microwave cooking appliance according to the embodiment of the present application.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The disclosure herein provides many different embodiments or examples for implementing different structures of the application. To simplify the disclosure of this application, components and arrangements of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves 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 one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 and 2, a control method of a microwave cooking appliance 100 according to an embodiment of the present application includes:

step 01, after initialization, the serial data of the solid source 12 is read and preliminary processing is performed on the serial data to obtain a command including setting the frequency, phase and power of the microwaves.

Step 03, controlling the solid source 12 to operate to emit microwaves into the cavity 14 according to the command;

step 05, during the operation of the solid source 12, parameter information fed back by the solid source 12 is collected to execute a protection strategy and a power closed-loop control strategy until the food cooking is completed.

In the above control method, the solid-state source 12 is used as a microwave signal source, and the frequency, phase and power of the solid-state source 12 can be set in a digital control manner, so that the application of various scenes of the microwave cooking appliance 100 is realized, and the cooking demands of people are met.

In particular, the microwave cooking appliance 100 may include, but is not limited to, a microwave oven, a microwave rice cooker, and the like microwave cooking appliance 100. The solid state source 12 may comprise a semiconductor microwave source. Microwave cooking appliance 100 may include an input assembly 16, a main control board 18, an antenna 20, and a solid state source 12, main control board 18 connecting input assembly 16 and solid state source 12. The input assembly 16 may include inputs such as a touch screen and keys, and a user may input related commands through the input assembly 16 to control the operation of the microwave cooking appliance 100.

When the solid-state source 12 is powered on and operates, a main processor (MCU) in the solid-state source 12 is initialized, and the initialization of an IO port, a peripheral device, a watchdog, a register and a serial port is mainly performed.

In step 01, solid state source 12 serial data may be read from a buffer of solid state source 12.

The solid state source 12 may emit microwaves according to the set frequency, phase and power of the microwaves and the cavity 14 may be used to place the food to be heated. Microwaves emitted by the solid source 12 can be fed into the cavity 14 through the antenna 20, and the food to be heated in the cavity 14 can absorb the microwave energy, so that the food to be heated can be cooked.

The parameter information fed back by the solid state source 12 may include, but is not limited to, power, frequency, phase, temperature, S-parameters, operating status (e.g., whether data is being sent or received during operation or suspension), etc. The solid state source 12 may implement a protection strategy and a power closed loop control strategy based on these parameter information until the cooking of the food is complete. Food cooking completion may refer to the end of the food cooking time. The food cooking time may be set by a default time, or by a system, or by a user, and is not particularly limited herein.

In certain embodiments, step 01 comprises:

in the case where the solid state source 12 has data in the buffer and the data is complete, the read data is subjected to preliminary processing to obtain a command. Thus, the control accuracy can be improved.

Specifically, under the condition that the data in the buffer area is complete data, the data is initially processed, so that the complete data required by control can be obtained, and the accuracy of control is improved.

After initialization, it may first determine whether there is data in the buffer, and if so, read the data and determine whether the read data is complete data. The complete data may refer to a complete frame of data, and a frame of data may refer to all parameter data returned by the internal devices of the solid-state source 12 according to the data acquisition command after the MCU of the solid-state source 12 issues the data acquisition command. For example, when the solid state source 12 is powered up, the MCU of the solid state source 12 may issue data acquisition commands, which are acquisition of microwave power, frequency and phase, and temperature. The internal components of the solid state source 12 may feed corresponding parameter data, such as microwave frequency, power and phase, and temperature, back to the MCU of the solid state source 12 in accordance with the data acquisition commands. In the case where the parameter data returned includes temperature, power, frequency and phase, then the data is considered to be a complete frame of data.

If the data is complete, processing of the read data is started to obtain commands including setting the frequency, phase, power, interrogation, etc. of the microwaves.

In certain embodiments, the control method comprises:

when the corresponding feedback data is obtained according to the command, the feedback data is returned to the main control board 18 through the serial port of the solid source 12.

In this manner, the main control board 18 may be enabled to obtain the operating conditions of the solid state source 12.

Specifically, the solid state source 12 may operate according to commands of the main control board 18, such as microwave frequency, phase and power set according to the commands to emit microwaves. When the solid-state source 12 is operated, feedback data such as microwave frequency, phase and power can be returned to the main control board 18 through the serial port, so that the main control board 18 can know the operation state of the solid-state source 12 in real time, and whether the solid-state source 12 is operated according to a preset cooking program or not and whether abnormality occurs can be judged according to the operation state of the solid-state source 12.

In some embodiments, referring to fig. 3, the control method includes:

judging whether the data reception is overtime or not under the condition that the buffer area of the solid source 12 has data and the data is incomplete data;

if the receiving has no timeout, judging whether the buffer area has data;

in the event of a reception timeout, the reception state of the solid-state source 12 is reset and returned to the determination of whether the buffer has data.

In this manner, the normal operation of the microwave cooking appliance 100 may be ensured.

Specifically, if the data read from the serial port is incomplete data, it is determined whether the data reception is timed out. If the reception has not timed out, it is determined again whether or not there is data in the buffer, and if the reception has timed out, the reception state of the solid-state source 12 is reset and returned to the beginning.

The time-out period may be preset and the specific time-out period may be determined empirically, or by simulation or testing.

Setting the time-out period can avoid that the solid state source 12 always judges whether the data is complete data, which affects the normal operation of the microwave cooking appliance 100.

In some embodiments, the protection strategy includes at least one of transmit power protection, reflected power protection, over temperature protection, no communication protection;

the transmission power protection includes turning off microwave transmission of the solid state source 12 in the event that the microwave transmission power of the solid state source 12 is greater than a first power threshold;

reflected power protection includes turning off microwave emissions from the solid state source 12 if the reflected power of the microwaves from the solid state source 12 is greater than a second power threshold;

over-temperature protection includes turning off microwave emissions from the solid state source 12 if the temperature of the solid state source 12 is greater than a temperature threshold;

no communication protection includes turning off microwave emissions from the solid state source 12 in the event of an abnormal communication between the solid state source 12 and the main control panel 18 of the microwave cooking appliance 100.

In this way, the solid state source 12 may be protected from damage by the solid state source 12.

Specifically, in one embodiment, the solid state source 12 includes two microwave transmitting channels and two microwave receiving channels, each microwave transmitting channel may feed microwaves into the cavity 14 through the antenna 20, and each microwave receiving channel may receive microwaves reflected within the cavity 14 through the antenna 20.

In the operation process of the solid-state source 12, whether two paths (two paths of microwave transmitting paths and two paths of microwave receiving paths) of the solid-state source 12 reach the protection limit is judged, so that the damage of the solid-state source 12 is avoided.

Specifically, the protection state of the transmission power of the first channel, the protection state of the reflection power of the first channel, the protection state of the transmission power of the second channel and the protection state of the reflection power of the second channel can be judged. In the case that the microwave transmission power of the first channel is greater than the first power threshold, the microwave transmission of the first channel may be turned off. And under the condition that the microwave transmission power of the second channel is larger than the first power threshold, the microwave transmission of the second channel can be closed. The first power threshold used by each channel can be the same or different, and can be set according to actual conditions.

In the case that the microwave reflected power of the first channel is greater than the second power threshold, the microwave emission of the first channel may be turned off. And under the condition that the microwave reflected power of the second channel is larger than the second power threshold, the microwave emission of the second channel can be turned off. The second power threshold used by each channel can be the same or different, and can be set according to actual conditions.

The microwave cooking appliance 100 may include a forward detection assembly including a forward coupler and a forward detection member, and a reverse detection assembly. When one of the microwave emission channels is opened, the forward detection assembly can delay for a certain time (such as 70 ms) and acquire the data of the microwave emission power. If both microwave emission channels are not opened, judging whether the power supply voltage is powered or not or whether the solid source is in a receiving state or not. In the absence of a supply voltage, this is directly ended. While the solid state source 12 is in the receiving state, the current microwave transmit power may be calculated.

The microwave transmitting power can be collected through a forward coupler, the forward coupler can collect a part of the microwave transmitting power, the part of the microwave transmitting power is converted into forward voltage through a forward detection element (such as a detector), and the MCU of the solid source 12 can determine the size of the microwave transmitting power according to a preset corresponding relation table of the voltage and the power and the forward voltage, and then can be compared with a first power threshold value.

The reverse detection assembly includes a reverse coupler and a reverse detection member. The microwave reflected power may be collected by a reverse coupler, which may collect all or a portion of the microwave emitted power, and the microwave reflected power may be converted into a reverse voltage by a reverse detection element (e.g., a detector), and the MCU of the solid source 12 may determine the magnitude of the microwave reflected power according to a preset correspondence table between the voltage and the power and the reverse voltage, and may further compare with the second power threshold.

In other embodiments, the number of microwave transmitting channels and microwave receiving channels is not limited to two, but may be other numbers, such as one, or more than two, not specifically limited herein.

One or more temperature sensors may be disposed inside the solid-state source 12, through which the MCU of the solid-state source 12 may collect the temperature of the solid-state source 12, and when the temperature of the solid-state source 12 is greater than the temperature threshold, the MCU of the solid-state source 12 may turn off the microwave emission of the solid-state source 12.

The non-communication protection includes turning off the microwave emission of the solid state source 12 in the event of an abnormality in communication between the solid state source 12 and the main control board 18 of the microwave cooking appliance 100, so that the operation of the solid state source 12 can be prevented from being separated from the monitoring and control of the main control board 18. Specifically, after the communication between the main control board 18 and the solid state source 12 is established, the MCU of the solid state source 12 may always determine whether the communication between the solid state source 12 and the main control board 18 is normal, for example, the MCU of the solid state source 12 may continuously send a heartbeat packet to the main control board 18, if the MCU of the solid state source 12 can receive the return information sent by the main control board 18 after a certain period of time, it is considered that the communication is normal, otherwise, it is considered that the communication is abnormal.

Under the condition of abnormal communication, the microwave emission of the solid-state source 12 can be turned off after a certain period of time (such as after 10S), for example, the power amplifier of the two paths of microwave emission channels can be turned off, fault information can be reported to the main control board 18, and the fault information can be displayed on the display screen of the microwave cooking appliance 100. If the communication between the solid state source 12 and the master control board 18 is normal, the MCU of the solid state source 12 may read the commands sent by the master control board 18 and operate in accordance with the commands.

In some embodiments, a power closed loop control strategy includes:

detecting the microwave emission power of the solid-state source 12;

in the case where the microwave transmission power is not equal to the target power, the microwave transmission power of the solid-state source 12 is adjusted until the microwave transmission power is equal to the target power.

In this manner, the solid state source 12 may be enabled to operate at a target power.

Specifically, the setting instruction issued by the main control board 18 includes setting of microwave power. The MCU of the solid state source 12 may control the solid state source 12 to emit microwaves according to the set instructions. The target power may be obtained by a set instruction. The MCU of the solid state source 12 may determine the magnitude of the microwave transmit power through the forward detection component. The MCU of the solid state source 12 may compare the magnitudes of these two powers. In the case where the microwave transmission power is not equal to the target power, the microwave transmission power of the solid-state source 12 is adjusted until the microwave transmission power is equal to the target power.

In some embodiments, where the microwave transmit power is not equal to the target power, adjusting the microwave transmit power of the solid state source 12 until the microwave transmit power is equal to the target power includes:

under the condition that the microwave transmitting power is not equal to the target power, calculating a compensation value of a digital-to-analog converter of the solid-state source 12, correcting the microwave transmitting power, delaying for a preset time length, adding one to the value of the counter, and re-detecting the microwave transmitting power until the microwave transmitting power is equal to the target power, or the accumulated value of the counter exceeds a frequency threshold.

In this way, the accuracy and efficiency of control of the solid state source 12 may be improved.

Specifically, a certain reaction time is required when the internal components of the solid state source 12 are adjusted. By setting the delay time of the preset duration, the internal devices of the solid-state source 12 can be adjusted according to the latest command. And then detecting the microwave emission power. The detected microwave emission power is the adjusted microwave emission power, but not the microwave emission power before adjustment, so that the accuracy of controlling the solid source 12 can be improved. In one example, the preset time period may be 70us.

By setting the counter, it is possible to avoid that the control method always adjusts the power and cannot continue cooking under the condition that the microwave emission power cannot be adjusted to be equal to the target power adjustment, and further control efficiency of the solid source 12 can be improved. In one example, the number of times threshold may be 15 times.

While the solid-state source 12 is in the receiving state, a DA (digital to analog converter) may be set first to adjust the upper limit value. The upper limit value may correspond to one power value and different upper limit values may correspond to different power values. When the upper limit is 1000 units, the corresponding power value is 100W. When the target power corresponding to the set instruction is 100W, the MCU of the solid-state source 12 may set the upper limit value of DA to 1000, and then the solid-state source 12 outputs the microwave power at 100W. The solid state source 12 is in a receiving state, which may refer to a state in which the solid state source 12 is in after initialization.

During operation of the solid state source 12, the current microwave transmit power is calculated based on the collected data (e.g., parameter information). And judging whether the current microwave transmitting power is larger or smaller than the target power. When the current microwave transmission power is equal to the target power, the voltage of the reverse power, namely the voltage of the reflected microwave (reverse voltage), is detected, and the reflected power of the microwave is calculated.

And when the current microwave transmitting power is larger or smaller than the target power, calculating a compensation value of DA, correcting the microwave transmitting power, and carrying out delay of a preset duration, wherein the value of the counter is increased by one. For example, the target power is 100W, and the corresponding DA upper limit value is 1000 units. The solid-state source 12 may adjust the DA upper limit to 1000 units so that the microwave emission power of the microwave signal source is 100W. In the table of correspondence between voltage and power, the forward voltage corresponding to 100W is 0.5V. The forward direction detection component is used for collecting that the current forward direction voltage is 0.3V, and in a corresponding relation table of the voltage and the power, the power corresponding to 0.3V is 90W, which indicates that the current microwave output power 90W is smaller than the target power 100W. The MCU of the solid-state source 12 may adjust the upper limit value of DA, for example, to 1000 units to 1050 units, and delay for a preset period of time, increment the counter by one, and detect the forward voltage again until the current microwave emission power is equal to the target power, or the accumulated value of the counter exceeds the threshold number of times.

In the embodiment of the present application, the solid source 12 includes two microwave emission channels, and the microwave emission power of the two microwave emission channels can be collected and corrected, so that the microwave emission power of each microwave emission channel is equal to the target power.

In one embodiment, the microwave transmission power of the microwave transmission channel is equal to the target power, which may be that the microwave transmission power of the microwave transmission channel is completely equal to the target power, or that the difference between the microwave transmission power of the microwave transmission channel and the target power is within a preset range.

Referring to fig. 4, fig. 4 is a control method of a microwave cooking appliance according to an embodiment of the present application. In fig. 4, after the communication between the solid-state source 12 and the main control board 18 is established, the MCU of the solid-state source 12 always determines whether the communication is normal. If the communication is abnormal, closing the two paths of power amplifiers after 10S, and reporting fault information to the main control. If the communication between the solid-state source 12 and the main control board 18 is normal, the MCU of the solid-state source 12 reads the command issued by the main control board 18, so that at least one of the two microwave emission channels is opened, such as the first channel is opened. After a delay of 70ms, the transmit power voltage value (forward voltage) of channel one is detected. If neither microwave transmission channel is on, it is determined whether the power supply voltage is on or whether the solid state source 12 is in a receiving state. In the absence of a supply voltage, this is directly ended.

Under the condition that the solid-state source 12 is in a receiving state, the target power is acquired, the DA adjustment upper limit value is set, and whether the current microwave transmitting power is larger or smaller than the target power is judged in the acquired parameter information. And when the current microwave transmitting power is equal to the target power, starting to detect the voltage value (reverse voltage) of the microwave reflecting power of the first channel, and calculating the reflecting power.

And when the current microwave transmission power is larger than or smaller than the target power, calculating a compensation value of DA, correcting the current microwave transmission power, delaying for 70us, adding one to the value of the counter, and re-detecting the microwave transmission power of the first channel until the current microwave transmission power is equal to the target power, or the accumulated value of the counter exceeds 15. When the current microwave transmitting power is equal to the target power or the accumulated value of the counter exceeds 15, detecting the voltage value (reverse voltage) of the microwave reflecting power of the first channel, and calculating the reflecting power. The two-channel processing method of the dual solid state source 12 is identical to the one-channel processing method.

In some embodiments, the power closed loop control strategy comprises:

detecting the microwave reflected power of the solid-state source 12 in the case where the microwave transmitted power is equal to the target power;

determining the state of the food in the cavity 14 based on the microwave emission power;

the solid state source 12 is controlled to operate according to the food status.

Thus, the cooking effect of the food can be improved.

Specifically, a user may select a cooking menu via the input assembly 16, and the main control board 18 may determine parameters of power, frequency, phase, etc. of the microwaves and microwave energy that the food needs to absorb during cooking according to the cooking menu, and issue a setting instruction to the solid state source 12, and the solid state source 12 operates according to the setting instruction.

In the case where the microwave emission power is equal to the target power, the MCU of the solid-state source 12 may detect the reverse voltage through the reverse detection component, and thus may determine the microwave reflection power. The microwave energy absorbed by the food can be determined by the difference between the microwave transmit power and the microwave reflected power.

In one embodiment, the cooking process of the food may be divided into a plurality of cooking phases, and at the end of each cooking phase, it may be determined how much microwave energy the food absorbs, and if the absorbed microwave energy is different from the target energy, compensation is performed in the next cooking phase. If the microwave energy absorbed is smaller than the target energy of the current cooking stage, the microwave transmitting power is increased in the next cooking stage, and/or the cooking duration of the next cooking stage is increased, so that the microwave energy absorbed by the food is the same as the target energy of the next cooking stage when the next cooking stage is finished, and the food can absorb the required microwave energy when the whole cooking process is finished, thereby improving the cooking effect of the food.

In one embodiment, the microwave energy absorbed by the food is identical to the target energy, and the microwave energy absorbed by the food may be identical to the target energy, or the difference between the microwave energy absorbed by the food and the target energy may be within a preset range.

According to the embodiment of the application, the application of the cooking algorithm and the heating algorithm based on the solid source 12 can be realized through a digital control method of the solid source 12, such as fresh uniform thawing, preheating-free quick baking, partition heating, efficient heating, pattern recognition and the like. Communication serial port communication or other communication modes, and communication protocol instructions are used for adjusting frequency, phase and power. The frequency is 2400-2500 MHz, and the minimum interval is 0.1MHz; the power of the two microwave emission channels is 500W, the minimum interval is 0.1W, the phase is 0-360 degrees, and the minimum interval is 1 degree.

The microwave transmitting power (forward transmitting power) of the solid-state source 12 and the microwave reflecting power in the cavity 14 are detected in real time through the double directional couplers (forward coupler and reverse coupler) integrated in the solid-state source 12, the accuracy is smaller than 0.5dB, the energy fed into the cavity 14 is accurately calculated and controlled, the energy required by the heated food is accurately controlled, the state of the cooked food is detected, and the current state of the cavity 14 is fed back in a real-time closed loop manner (such as power, frequency, phase, S parameter and other information). The internal high-speed main control chip and algorithm can also be used for realizing rapid scanning, data processing and communication of the cooking cavity 14, realizing uniform heating, partition heating, one-key cooking and other high-quality cooking, and providing guarantee for realizing comprehensive digitization and intellectualization of the cooking utensil. Moreover, the solid state source 12 can achieve heating and scanning speeds on the order of 1ms, meeting the use requirements of high precision algorithms.

Referring to fig. 2, a solid state source 12 in the embodiment of the present application is used in a microwave cooking appliance 100, where the solid state source 12 includes a processor 22 and a memory 24, and the memory 24 stores a computer program, and when the computer program is executed by the processor 22, the steps of the control method of the microwave cooking appliance in any of the foregoing embodiments are implemented.

Referring to fig. 2, a microwave cooking appliance according to an embodiment of the present application includes:

a main control board 18;

the solid state source 12, connected to the main control board 18,

the main control board 18 is used to set the frequency, phase and power of the microwaves and to send corresponding commands to the solid-state sources.

The present application provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the control method of the microwave cooking appliance of any one of the above embodiments.

In the above solid-state source 12, the microwave cooking apparatus 100 and the storage medium, the solid-state source 12 is used as a microwave signal source, and the frequency, the phase and the power of the solid-state source 12 can be set in a digital control manner, so that the application of the microwave cooking apparatus 100 in various scenes can be realized, and the cooking demands of people can be satisfied.

The above explanation of the embodiment and advantageous effects of the control method of the microwave cooking appliance 100 is also applicable to the solid-state source 12, the microwave cooking appliance 100, and the storage medium of the present embodiment, and is not developed in detail here to avoid redundancy.

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

Although the embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the embodiments described above by those of ordinary skill in the art within the scope of the application.

Claims (11)

1. A control method of a microwave cooking appliance, comprising:

after initialization, the solid source serial data is read and preliminary processing is performed on the serial data to obtain commands including setting the frequency, phase and power of microwaves.

Controlling the operation of the solid source to emit microwaves into the cavity according to the command;

and in the running process of the solid source, collecting parameter information fed back by the solid source to execute a protection strategy and a power closed-loop control strategy until food cooking is completed.

2. The control method of a microwave cooking appliance according to claim 1, wherein after initializing, reading solid source serial data and performing preliminary processing on the serial data to obtain a command including setting frequency, phase and power of microwaves, comprises:

and under the condition that the solid source buffer area has data and the data is complete data, performing preliminary processing on the read data to acquire the command.

3. The control method of a microwave cooking appliance according to claim 2, wherein the control method comprises:

and under the condition that corresponding feedback data is obtained according to the command, replying the feedback data to the main control board through the solid source serial port.

4. The control method of a microwave cooking appliance according to claim 2, wherein the control method comprises:

judging whether the data reception is overtime or not under the condition that the solid source buffer area has data and the data is incomplete data;

if the receiving has no timeout, judging whether the buffer area has data or not again;

and under the condition of overtime reception, resetting the receiving state of the solid source, and returning to judging whether the buffer zone has data.

5. The method of claim 1, wherein the protection strategy comprises at least one of transmit power protection, reflected power protection, over temperature protection, no communication protection;

the emission power protection comprises turning off microwave emission of the solid state source if the microwave emission power of the solid state source is greater than a first power threshold;

the reflected power protection includes turning off microwave emissions from the solid state source if the microwave reflected power of the solid state source is greater than a second power threshold;

the over-temperature protection includes turning off microwave emissions from the solid state source if the temperature of the solid state source is greater than a temperature threshold;

the communication-free protection includes turning off microwave emission of the solid state source in case of abnormal communication between the solid state source and a main control board of the microwave cooking appliance.

6. The method of claim 1, wherein the power closed loop control strategy comprises:

detecting the microwave emission power of the solid source;

and under the condition that the microwave transmitting power is not equal to the target power, adjusting the microwave transmitting power of the solid source until the microwave transmitting power is equal to the target power.

7. The control method of a microwave cooking appliance according to claim 6, wherein, in the case where the microwave transmission power is not equal to the target power, adjusting the microwave transmission power of the solid state source until the microwave transmission power is equal to the target power, comprises:

and under the condition that the microwave transmitting power is not equal to the target power, calculating a compensation value of the digital-to-analog converter of the solid-state source, correcting the microwave transmitting power, delaying for a preset time length, adding one to the numerical value of the counter, and re-detecting the microwave transmitting power until the microwave transmitting power is equal to the target power, or the numerical value accumulated by the counter exceeds a frequency threshold.

8. The method of controlling a microwave cooking appliance of claim 6, wherein the power closed loop control strategy comprises:

detecting the microwave reflected power of the solid source under the condition that the microwave transmitted power is equal to the target power;

determining a food state in the cavity according to the microwave emission power;

and controlling the operation of the solid source according to the food state.

9. A solid state source for a microwave cooking appliance, characterized in that the solid state source comprises a processor and a memory, the memory storing a computer program which, when executed by the processor, implements the steps of the control method of a microwave cooking appliance as claimed in any one of claims 1-8.

10. A microwave cooking appliance, comprising:

a main control board;

the solid state source of claim 9, connected to the main control board,

the main control board is used for setting the frequency, the phase and the power of the microwaves and sending corresponding commands to the solid source.

11. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the control method of a microwave cooking appliance according to any one of claims 1-8.