Control method of cooking appliance and cooking appliance

Abstract

The application provides a cooking utensil control method and cooking utensil, and belongs to the technical field of food processing. The cooking utensil comprises a cooking cavity, a temperature sensor and a heating device. The control method comprises the following steps: obtaining a temperature value in the cooking cavity; determining a temperature change trend in the cooking cavity every first preset time length based on the temperature value; when the temperature change trend is consistent with a theoretical temperature change trend corresponding to the working state of the heating device, determining whether the temperature value under the temperature change trend has passed a temperature threshold corresponding to the temperature change trend, wherein each temperature change trend corresponds to a temperature threshold; and when the temperature value has passed the temperature threshold corresponding to the temperature change trend, changing the current working state of the heating device to block the temperature change trend. The application controls the working state of the heating device in advance based on the temperature value in the cooking cavity, the current temperature change trend and the current working state of the heating device, thereby improving the temperature control precision of the cooking utensil.

Description

Technical Field

[0001] This application relates to the field of food processing technology, and in particular to a control method for a cooking utensil and a cooking utensil. Background Technology

[0002] With the continuous advancement of technology, people's living standards have gradually improved. For example, in daily life, people's cooking methods have become more diverse and convenient, and various food processing products have appeared on the market, providing users with more cooking options.

[0003] An existing cooking appliance temperature control system mainly consists of a temperature sensor, a heating element, a fan, and a microcontroller. The temperature sensor is usually a thermistor, whose resistance changes with temperature. The temperature measurement hardware circuit can convert the temperature change into an electrical signal value change, such as a voltage signal or a digital signal. Therefore, the microcontroller can detect the electrical signal value to determine the temperature change of the cooking appliance and then control the heating element and the fan, thereby achieving the effect of controlling the cooking temperature of the cooking appliance.

[0004] Conventional temperature control algorithms simply compare the program's temperature control threshold with the electrical signal value fed back to the microcontroller from the temperature sensor to determine whether the heating element should be turned on or off. However, low-cost temperature sensors generally have long response times, and the electrical signal value they feed back often lags behind the electrical signal value corresponding to the actual temperature inside the cooking appliance. This causes the heating element to actually lag behind the temperature control point in turning on or off, resulting in a large temperature range in the temperature control curve and inaccurate temperature control.

[0005] Therefore, the technical problem of improving the temperature control accuracy of cooking appliances urgently needs to be solved. Summary of the Invention

[0006] This application provides a control method and cooking appliance for cooking appliances to solve the technical problem of how to improve the temperature control accuracy of cooking appliances.

[0007] According to one aspect of the embodiments of this application, a control method for a cooking appliance and a cooking appliance are provided. The cooking appliance includes a cooking cavity, a temperature sensor, and a heating device. The control method includes: acquiring a temperature value inside the cooking cavity; determining a temperature change trend inside the cooking cavity at first preset intervals based on the temperature value; when the temperature change trend is consistent with the theoretical temperature change trend corresponding to the working state of the heating device, determining whether the temperature value under the temperature change trend has passed a temperature threshold corresponding to the theoretical temperature change trend, wherein each theoretical temperature change trend corresponds to a temperature threshold; when the temperature value passes the temperature threshold corresponding to the theoretical temperature change trend, changing the current working state of the heating device to block the temperature change trend.

[0008] Optionally, the theoretical temperature change trend includes an upward trend and a downward trend, wherein the first temperature threshold corresponding to the upward trend is less than the second temperature threshold corresponding to the downward trend.

[0009] Optionally, changing the current operating state of the heating device when the temperature value passes through the temperature threshold corresponding to the theoretical temperature change trend includes: when the temperature change trend is upward, determining whether the temperature value is greater than a first temperature threshold; if it is greater, controlling the heating device to stop heating; when the temperature change trend is downward, determining whether the temperature value is less than a second temperature threshold; if it is less, controlling the heating device to start heating.

[0010] Optionally, the control method for the cooking appliance further includes: when the temperature change trend is inconsistent with the theoretical temperature change trend, determining whether the temperature change trend is a temperature maintenance trend; when the temperature change trend is a temperature maintenance trend; if the heating device is in a heating state, and the temperature value within a second preset time period is greater than or equal to the first temperature threshold, then the temperature change trend changes from a maintenance trend to an upward trend, and heating is stopped after passing the first temperature threshold; if the heating device is in a stopped heating state, and the temperature value within a second preset time period is less than or equal to the second temperature threshold, then the temperature change trend changes from a maintenance trend to a downward-rising trend, and heating is turned on after passing the second temperature threshold, wherein the second preset time period is N times the first preset time period, where N is a natural number.

[0011] Optionally, when the temperature change trend is opposite to the theoretical temperature change trend, the current operating state of the heating device is maintained.

[0012] Optionally, the first preset duration is determined based on the rate of temperature change of the temperature change trend.

[0013] Optionally, the first preset duration is inversely correlated with the rate of temperature change corresponding to the temperature change trend.

[0014] Optionally, the first temperature threshold is the temperature value at which the temperature inside the cooking cavity reaches the target valley temperature after a first preset time period when the heating device switches from the heating state to the stop heating state.

[0015] Optionally, the second temperature threshold is the temperature value at which the temperature inside the cooking cavity reaches the target peak temperature after a first preset time period when the heating device switches from a stopped heating state to a heating state.

[0016] According to one aspect of the embodiments of this application, a cooking appliance is also provided, including a cooking cavity, a temperature sensor, and a heating device, wherein the temperature sensor is used to collect temperature values ​​within the cooking cavity; and a controller is also provided, connected to the temperature sensor and the heating device respectively, including a memory and a processor, wherein the memory stores a computer program, and the processor is used to execute the computer program to perform the control method of the cooking appliance described in any one of the above.

[0017] This application is based on the temperature value inside the cooking cavity, the current temperature change trend, and the current working state of the heating device. Furthermore, it detects whether the temperature value under the temperature change trend has passed the temperature threshold corresponding to the temperature change trend. When the temperature value passes the temperature threshold corresponding to the temperature change trend, considering the delay of the temperature sensor, it indicates that the current temperature has reached or is about to reach the extreme value of the temperature change trend. At this time, it is necessary to change the current working state of the heating device to prevent the temperature change trend from continuing. This advances control of the heating device's working state and prevents the temperature value from lagging behind the actual temperature value inside the fryer due to the large reaction time of the temperature sensor, thus preventing the heating element from being delayed in control. The "advance control" effect reduces the impact of the large reaction time of the temperature sensor on the accuracy of temperature control and improves the accuracy of the air fryer's temperature control curve.

[0018] Furthermore, during the operation of the cooking appliance, there are two phases: a heating phase and a temperature control phase. The temperature control phase involves maintaining the temperature inside the cooking cavity within a stable temperature range. The theoretical temperature change trend corresponding to the operating state of the heating device is consistent with the current temperature change trend. This could be the heating device being in a heating state with an increasing temperature trend, or the heating device being in a non-heating state with a decreasing temperature trend. When the temperature change trend is consistent with the theoretical temperature change trend, it is determined whether the temperature value in this phase has passed the temperature threshold under that temperature change trend. This temperature threshold can be the maximum or minimum temperature threshold that the temperature value is allowed to reach when the cooking appliance is in the temperature control phase. When the temperature value passes the temperature threshold under the corresponding temperature change trend, combined with the lag of the temperature sensor feedback information, it indicates that the temperature has passed the corresponding temperature threshold for a certain period of time. At this point, it can be determined that the temperature value is within the temperature range allowed by the temperature control phase. The current operating state of the heating device can be changed to control the temperature value inside the cooking cavity in advance, preventing the temperature amplitude of the temperature control curve from being too large.

[0019] Furthermore, when the temperature trend is upward, if the current temperature value is greater than the first temperature threshold, it indicates that the current temperature value has exceeded the minimum temperature threshold allowed in the temperature control stage. At this time, the heating device is controlled to stop heating to prevent the current temperature value from rising and reduce the temperature amplitude. When the temperature trend is downward, if the current temperature value is less than the second temperature threshold, combined with the lag of the temperature sensor feedback information, it indicates that the actual temperature value has been lower than the current temperature value for a period of time, or even that the actual temperature has been lower than the first temperature threshold. It is necessary to control the heating device to start heating to prevent the temperature from falling and reduce the temperature amplitude of the temperature control curve. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a flowchart illustrating an optional control method for a cooking appliance according to an embodiment of this application; Figure 2 This is a schematic diagram of the temperature control curve of an optional cooking appliance according to an embodiment of the present invention; Figure 3 This is a flowchart of an optional control method for a cooking appliance according to an embodiment of this application; Figure 4 This is a structural block diagram of an optional electronic device according to an embodiment of this application. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] According to one aspect of the embodiments of this application, a control method for a cooking appliance is provided, the cooking appliance including a cooking cavity, a temperature sensor, and a heating device, the control method including: S10. Obtain the temperature value inside the cooking cavity.

[0026] The temperature value inside the cooking cavity is obtained by a temperature sensor, which can be a thermistor, thermocouple, etc.

[0027] S20. Based on the temperature value, determine the temperature change trend inside the cooking cavity every first preset time interval.

[0028] The controller acquires temperature information sent by the temperature sensor in real time, decodes and analyzes the acquired temperature information to obtain the temperature value, determines the temperature change trend every first preset time interval based on the temperature value, and determines the corresponding control strategy based on the temperature change trend and the temperature value to control the working state of the heating device.

[0029] When the cooking appliance is in operation, the operating status of the heating device is acquired. As an optional embodiment, when the heating device is in heating mode, the heat continuously increases, and theoretically, the temperature inside the cooking cavity tends to rise. When the heating device is in off-heating mode, the heat inside the cooking cavity continuously decreases due to heat dissipation, and theoretically, the temperature inside the cooking cavity tends to fall. When the temperature change trend matches the theoretical temperature change trend corresponding to the operating status of the heating device, proceed to step S30.

[0030] S30. Determine whether the temperature value under the temperature change trend has passed the temperature threshold of the theoretical temperature change trend corresponding to the temperature change trend, wherein each theoretical temperature change trend corresponds to a temperature threshold.

[0031] When a cooking appliance is in operation, it includes a heating phase and a temperature control phase. During the temperature control phase, it's necessary to ensure the temperature inside the cooking cavity remains stable within a certain range. In the temperature control curve of this phase, the temperature value inside the cooking cavity fluctuates within a certain range to maintain temperature stability, which is beneficial for cooking the food. In this embodiment, the temperature threshold corresponding to the theoretical temperature change trend is close to or at the extreme value of that theoretical temperature change trend. After passing this temperature change threshold, the current temperature is about to reach or has already reached the extreme value under the theoretical temperature change trend.

[0032] S40. When the temperature value exceeds the temperature threshold corresponding to the theoretical temperature change trend, the current working state of the heating device is changed to block the temperature change trend.

[0033] The system detects whether the temperature value under the temperature change trend has passed the temperature threshold corresponding to the temperature change trend. When the temperature value passes the temperature threshold corresponding to the temperature change trend, considering the delay of the temperature sensor, it indicates that the current temperature has reached or is about to reach the extreme value of the temperature change trend. At this time, it is necessary to change the current working state of the heating device to prevent the temperature change trend from continuing. This advances the control of the working state of the heating device and prevents the temperature value caused by the large reaction time of the temperature sensor from lagging behind the actual temperature value in the fryer, thus causing the heating tube to lag in control. The "advance control" effect reduces the impact of the large reaction time of the temperature sensor on the accuracy of temperature control and improves the accuracy of the air fryer's temperature control curve.

[0034] As an exemplary embodiment, the cooking appliance operates in two phases: a heating phase and a temperature control phase. The temperature control phase maintains the temperature within the cooking cavity within a stable temperature range. The theoretical temperature change trend corresponding to the heating device's operating state is consistent with the current temperature change trend. This could mean the heating device is in a heating state with an increasing temperature trend, or the heating device is in a non-heating state with a decreasing temperature trend. When the temperature change trend is consistent with the theoretical temperature change trend, it is determined whether the temperature value in this phase has passed the temperature threshold under that temperature change trend. This temperature threshold can be the maximum or minimum temperature threshold allowed for the temperature value when the cooking appliance is in the temperature control phase. When the temperature value passes the temperature threshold corresponding to the temperature change trend, the lag in the temperature sensor feedback information indicates that the temperature has passed the corresponding temperature threshold for a certain period of time. At this point, it can be determined that the temperature value is within the allowable temperature range of the temperature control phase. The current operating state of the heating device can be changed to control the temperature value within the cooking cavity in advance, preventing the temperature change trend from further increasing or decreasing, preventing a large temperature amplitude in the temperature control curve, and improving temperature control accuracy.

[0035] In this application, the maximum temperature threshold (preset peak temperature value) and the minimum temperature threshold (preset trough temperature value) allowed in the temperature control stage are defined as follows: the second temperature threshold is less than or equal to the maximum temperature threshold, and the first temperature threshold is greater than or equal to the minimum temperature threshold. The first temperature threshold is less than the second temperature threshold, and the upward trend in the temperature change trend corresponds to the first temperature threshold, while the downward trend corresponds to the second temperature threshold.

[0036] See Figure 2 As shown, the control method for cooking appliances, combining temperature values ​​and the operating state of the heating device, is explained for both theoretical temperature change trends of increasing and decreasing. As an exemplary embodiment, changing the current operating state of the heating device when the temperature value passes the temperature threshold corresponding to the temperature change trend includes: when the temperature change trend is increasing, determining whether the temperature value is greater than a first temperature threshold; if it is, controlling the heating device to stop heating; when the temperature change trend is decreasing, determining whether the temperature value is less than a second temperature threshold; if it is less, controlling the heating device to start heating.

[0037] As an exemplary embodiment, when the current temperature change trend in the cooking cavity is upward, if the current temperature value is greater than or equal to the first temperature threshold corresponding to the upward trend (where the first temperature threshold can be close to the preset trough temperature value), due to the delay of the temperature sensor, it can be known that the actual temperature value at the current moment is greater than the current temperature value sent by the temperature sensor at the current moment. That is, the actual temperature at the current moment has exceeded the first temperature threshold, and the temperature change trend is upward. The current temperature value may even reach the preset peak temperature. At this time, it is necessary to control the heating device to stop heating and prevent the temperature value from rising. Therefore, after the temperature value passes the first temperature threshold, the heating device is turned off in advance before the peak. After being turned off, the temperature rise trend will be slowed down. Under the temperature surge phenomenon, the temperature will continue to rise for a period of time and then enter a stable state at or before the preset peak temperature to prevent the temperature from rising too high.

[0038] When the current temperature change trend in the cooking cavity is downward, if the current temperature value is less than or equal to the second temperature threshold corresponding to the downward trend (where the second temperature threshold can be close to the preset peak temperature value), due to the delay of the temperature sensor, the current temperature value may be below the second temperature threshold, or even reach the preset trough temperature. Therefore, after the temperature value passes the second temperature threshold, the heating device is turned on in advance before the trough. After being turned on, the downward trend of the temperature will be slowed down. Under the temperature surge phenomenon, the temperature will continue to drop for a period of time, and then enter a stable state at or before the preset trough temperature, preventing the temperature from dropping too low.

[0039] As an exemplary embodiment, theoretically, when the heating device is in heating mode, the theoretical temperature change trend inside the cooking cavity is upward; when the heating device is in a stopped state, the theoretical temperature change trend inside the cooking cavity is downward. When the temperature value exceeds the temperature threshold corresponding to the temperature change trend, the heating state of the heating device will change. Due to the existence of temperature surge, that is, after heating stops, the residual heat inside the cooking cavity will be greater than the heat dissipated, causing the temperature to continue to rise. After heating is turned on, since the cooking cavity is in a heat dissipation state, the heat needs to accumulate to a certain level before reaching thermal equilibrium. Therefore, after heating is turned on, the temperature inside the cooking cavity will continue to drop for a period of time before rising again. Thus, the temperature change trend will not change immediately, and there may be inconsistencies between the theoretical temperature change trend corresponding to the working state of the heating device and the current temperature change trend.

[0040] For example, when the temperature inside the cooking cavity is below the first temperature threshold during an upward trend, it is in a heating state. When the temperature exceeds the first temperature threshold, it changes from a heating state to a stopped heating state. At this time, the temperature change trend is still upward. After rising for a period of time, it reaches thermal equilibrium and will be in a stable stage, that is, it reaches the peak.

[0041] When the temperature inside the cooking cavity is greater than the second temperature threshold during the downward trend, the heating is stopped. When the temperature is less than the second temperature threshold, the heating changes from the stopped state to the heating state. At this time, the temperature change trend is still downward. After a period of time, thermal equilibrium is reached, and the temperature will be in a stable stage, that is, the trough is reached.

[0042] Therefore, when detecting a temperature change trend, if the detected temperature change trend happens to be inconsistent with the theoretical temperature change trend, it is necessary to determine whether the temperature change trend is a temperature maintenance trend. If the temperature change trend is a temperature maintenance trend, the future trend can be further determined by extending the detection time to determine whether the current value is at a peak or a trough, and then the heating device can be further controlled.

[0043] If the heating device is in a heating state, and the temperature value within the second preset time period is greater than or equal to the first temperature threshold, then the temperature change trend changes from a maintenance trend to an upward trend, and heating stops after passing the first temperature threshold. If the heating device is in a stopped heating state, and the temperature value within the second preset time is less than or equal to the second temperature threshold, then the temperature change trend changes from a sustained trend to a decreasing-increasing trend. After passing the second temperature threshold, heating is turned on. The second preset time is N times the first preset time, where N is a natural number.

[0044] When the temperature change trend is inconsistent with the theoretical temperature change trend, in addition to the temperature maintenance phase, there will also be a situation where the temperature change trend is opposite to the theoretical temperature change trend. That is, when the heating device is in the heating state, the temperature change trend is decreasing, or when the heating device is not in the heating state, the temperature change trend is increasing. In this case, the current working state of the heating device can be maintained to prevent the temperature value in the cooking cavity from continuously rising or falling, resulting in an increase in the temperature control curve amplitude.

[0045] As an exemplary embodiment, the first preset duration is determined based on the temperature change rate of the temperature change trend. The first preset duration is inversely correlated with the temperature change rate corresponding to the temperature change trend. In this embodiment, the first preset duration for judging the temperature change trend is determined according to the actual situation of temperature sensors with different reaction times. Selection method: With the cooking appliance working normally, record the time required for a 1°C temperature change in the temperature segment with a large slope in the rising and falling phases of the temperature control curve. Using this time as a benchmark, list the alternative first preset durations for judging the temperature change trend in increments of 0.5 seconds (for example, but not limited to 0.5 seconds) upwards and downwards. While ensuring that the cooking appliance power, set temperature, and other working conditions remain unchanged, embed the alternative first preset durations one by one into the temperature control program, and select the first preset duration of the temperature control curve that is close to the target temperature control accuracy. The first preset duration should not be subjectively set as small as possible while ignoring the actual working conditions of the cooking appliance. If the first preset duration is much shorter than the time required for a 1°C temperature change in the temperature range with a large slope during the rising and falling phases of the temperature control curve, the detected temperature change trend will remain stable for an extended period, preventing the program from accurately judging the temperature change trend in the temperature range with a large slope during the rising and falling phases. Conversely, if the first preset duration is much longer than the time required for a 1°C temperature change in the temperature range with a large slope during the rising and falling phases, the program's accuracy in judging temperature changes will exceed 1°C, leading to delayed judgment of temperature change trends, delayed opening or closing of the heating device, and a large temperature range. The first preset duration is selected based on the time required for a 1°C temperature change in the temperature range with a large slope during the rising and falling phases. In this temperature range, the relationship between a 1°C temperature change and the time required for the temperature change is relatively linear, and 1°C in this case can accurately measure the temperature change of the temperature control system. The first preset duration allows the temperature control algorithm to relatively accurately capture the trend of temperature changes inside the cooking appliance based on the actual temperature of different cooking appliances.

[0046] After determining the first preset duration, a first temperature threshold and a second temperature threshold can be determined based on the first preset duration. As an exemplary embodiment, the first temperature threshold is the temperature value at which the temperature inside the cooking cavity reaches the target peak temperature after the first preset duration has elapsed when the heating device switches from a heating state to a stopped heating state; the second temperature threshold is the temperature value at which the temperature inside the cooking cavity reaches the target trough temperature after the first preset duration has elapsed when the heating device switches from a stopped heating state to a heating state. In this embodiment, a peak temperature of 200℃, a trough temperature of 180℃, and a temperature range of 20℃ are used as the target temperature control accuracy. Figure 2 For example, the method for determining the first temperature threshold is as follows: A temperature probe is placed inside the cooking appliance. When the heating device is in heating mode, it is turned off at temperature point B (°C). The temperature inside the cooking appliance will rise due to the heat released before the heating device is turned off, which is a temperature surge phenomenon. As time goes by, the temperature rise of the control curve slows down until the temperature curve remains constant within a first preset time period. At this point, the peak value of the temperature curve is reached. When the peak value is approximately 200°C, the temperature point B (°C) is determined as the first temperature threshold. The method for determining the second temperature threshold is as follows: A temperature probe is placed inside the cooking appliance. When the heating device is not in heating mode and the temperature curve shows a downward trend, it is turned on at temperature point C (°C). The temperature inside the cooking appliance will rise due to the heat released by the heating device, and the downward trend of the temperature curve slows down. Then, the temperature curve will remain constant within a first preset time period, which is the trough value of the temperature curve. When the trough value is approximately 180°C, the temperature point C (°C) is determined as the second temperature threshold. The first and second temperature thresholds determined using this method directly correspond to the peak and trough values ​​of the temperature control curve within the cooking appliance. Therefore, the difference between the first and second temperature thresholds can be used to design the temperature amplitude of the temperature control curve. It should be noted that the smaller the temperature amplitude of the temperature control curve is controlled, the more frequently the relay controlling the heating device's on / off state will trip within a unit of time. Therefore, when designing the first and second temperature thresholds, the lifespan of the relay should also be considered. A trade-off should be struck between the temperature amplitude of the cooking appliance's temperature control curve and the relay's lifespan to ensure that the overall lifespan of the cooking appliance meets the desired design lifespan.

[0047] See Figure 3 As shown, the control method of this application is fully described: When the cooking appliance is in the heating phase, the heating device maintains a stable heating state. After the heating phase is complete and the temperature control phase begins, the temperature change trend within the cooking cavity is assessed every preset time interval. If the temperature change trend aligns with the theoretical temperature change trend, and the heating device is in a heating state with an upward temperature trend, then if the current temperature value is greater than or equal to a first temperature threshold, the heating device is switched to a stopped heating state; if the current temperature value is less than the first temperature threshold, the current heating state is maintained. Conversely, if the temperature change trend aligns with the theoretical temperature change trend, and the heating device is in a non-heating state with a downward temperature trend, then if the current temperature value is less than or equal to a second temperature threshold, the heating device is switched to a heating state; if the current temperature value is greater than the second temperature threshold, the current non-heating state is maintained.

[0048] When the temperature change trend is opposite to the theoretical temperature change trend, the heating device is controlled to maintain the current heating state.

[0049] When the temperature change trend is a temperature maintenance trend, if the heating device is in heating mode and the temperature value within a second preset time period is greater than or equal to the first temperature threshold, the heating device is controlled to switch to a non-heating mode; if the temperature value within the second preset time period is less than the first temperature threshold, the current heating mode is maintained. Conversely, if the temperature change trend is a temperature maintenance trend and the heating device is in non-heating mode, if the temperature value within the second preset time period is less than or equal to the second temperature threshold, the heating device is controlled to switch to heating mode; if the temperature value within the second preset time period is greater than the second temperature threshold, the current non-heating mode is maintained.

[0050] According to another aspect of the embodiments of this application, a cooking appliance is also provided, including a cooking cavity, a temperature sensor, and a heating device. The temperature sensor is used to collect temperature values ​​within the cooking cavity. The appliance also includes a controller connected to the temperature sensor and the heating device, and includes a memory and a processor. The memory stores a computer program, and the processor is used to execute the computer program to perform the control method of the cooking appliance described in any of the above embodiments.

[0051] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM (Read-Only Memory) / RAM (Random Access Memory), magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0052] According to another aspect of the embodiments of this application, an electronic device for implementing the control method of the cooking appliance described above is also provided. The electronic device may be a server, a terminal, or a combination thereof.

[0053] Figure 4 This is a structural block diagram of an optional electronic device according to an embodiment of this application, such as... Figure 4 As shown, it includes a processor 502, a communication interface 504, a memory 506, and a communication bus 508. The processor 502, communication interface 504, and memory 506 communicate with each other via the communication bus 508. Memory 506 is used to store computer programs; When processor 502 executes a computer program stored in memory 506, it performs the following steps: Obtain the temperature value inside the cooking cavity; Based on the temperature value, the temperature change trend inside the cooking cavity is determined every first preset time interval; When the temperature change trend is consistent with the theoretical temperature change trend corresponding to the operating state of the heating device. Determine whether the temperature value under the temperature change trend has passed the temperature threshold of the theoretical temperature change trend corresponding to the temperature change trend, wherein each theoretical temperature change trend corresponds to a temperature threshold. When the temperature value exceeds the temperature threshold corresponding to the theoretical temperature change trend, the current operating state of the heating device is changed to block the temperature change trend.

[0054] Optionally, in this embodiment, the communication bus can be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. This communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0055] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0056] The memory may include RAM, or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0057] As an example, such as Figure 4 As shown, the memory 502 may include, but is not limited to, the module units in the cooking appliance described above, which will not be elaborated further in this example.

[0058] The processor mentioned above can be a general-purpose processor, including but not limited to: CPU (Central Processing Unit), NP (Network Processor), etc.; it can also be DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0059] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0060] Those skilled in the art will understand that Figure 4 The structure shown is for illustrative purposes only. The device that implements the control method of the cooking utensil described above can be a terminal device, such as a smartphone (e.g., an Android phone, an iOS phone), a tablet computer, a PDA, a mobile internet device (MID), a PAD, or other terminal devices. Figure 4This does not limit the structure of the aforementioned electronic device. For example, the terminal device may also include components that are more... Figure 4 The more or fewer components shown (such as network interfaces, display devices, etc.), or having the same Figure 4 The different configurations shown.

[0061] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing the hardware related to the terminal device. The program can be stored in a computer-readable storage medium, which may include: flash drive, ROM, RAM, disk or optical disk, etc.

[0062] According to another aspect of the embodiments of this application, a storage medium is also provided. Optionally, in this embodiment, the storage medium can be used to execute program code for a control method of a cooking appliance.

[0063] Optionally, in this embodiment, the storage medium may be located on at least one of the network devices in the network shown in the above embodiment.

[0064] Optionally, in this embodiment, the storage medium is configured to store program code for performing the following steps: Obtain the temperature value inside the cooking cavity; Based on the temperature value, the temperature change trend inside the cooking cavity is determined every first preset time interval; When the temperature change trend is consistent with the theoretical temperature change trend corresponding to the operating state of the heating device. Determine whether the temperature value under the temperature change trend has passed the temperature threshold of the theoretical temperature change trend corresponding to the temperature change trend, wherein each theoretical temperature change trend corresponds to a temperature threshold. When the temperature value exceeds the temperature threshold corresponding to the theoretical temperature change trend, the current operating state of the heating device is changed to block the temperature change trend.

[0065] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated in this embodiment.

[0066] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing program code, such as USB flash drives, ROMs, RAMs, portable hard drives, magnetic disks, or optical disks.

[0067] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0068] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause one or more computer devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0069] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0070] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0071] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the solution provided in this embodiment, depending on actual needs.

[0072] The technical solutions of this application have been described in conjunction with the preceding embodiments. However, it will be readily understood by those skilled in the art that the scope of protection of this application is not limited to these specific embodiments. Without departing from the technical principles of this application, those skilled in the art can disassemble and combine the technical solutions in the above embodiments, and can also make equivalent changes or substitutions to the relevant technical features. Any changes, equivalent substitutions, improvements, etc., made within the technical concept and / or technical principles of this application will fall within the scope of protection of this application.

[0073] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0074] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A method for controlling a cooking utensil, characterized in that, The cooking appliance includes a cooking cavity, a temperature sensor, and a heating device, and the control method includes: Obtain the temperature value inside the cooking cavity; Based on the temperature value, the temperature change trend inside the cooking cavity is determined every first preset time interval; When the temperature change trend is consistent with the theoretical temperature change trend corresponding to the working state of the heating device, it is determined whether the temperature value under the temperature change trend has passed the temperature threshold of the theoretical temperature change trend corresponding to the temperature change trend. The theoretical temperature change trend includes an upward trend and a downward trend. The upward trend corresponds to a first temperature threshold, and the downward trend corresponds to a second temperature threshold. The first temperature threshold is the temperature value at which the temperature in the cooking cavity reaches the target peak temperature after a first preset time when the heating device switches from the heating state to the stopping heating state. The second temperature threshold is the temperature value at which the temperature in the cooking cavity reaches the target valley temperature after a first preset time when the heating device switches from the stopping heating state to the heating state. The first temperature threshold is less than the second temperature threshold. When the temperature value exceeds the temperature threshold corresponding to the theoretical temperature change trend, the current operating state of the heating device is changed to block the temperature change trend.

2. The control method for cooking appliances as described in claim 1, characterized in that, When the temperature value passes the temperature threshold corresponding to the theoretical temperature change trend, changing the current operating state of the heating device includes: When the temperature change trend is upward, it is determined whether the temperature value is greater than a first temperature threshold. When the value is greater than the specified value, the heating device is controlled to stop heating. When the temperature change trend is downward, it is determined whether the temperature value is less than a second temperature threshold. When the temperature is less than the specified value, the heating device is activated to start heating.

3. The control method for cooking appliances as described in claim 1, characterized in that, Also includes: When the temperature change trend is inconsistent with the theoretical temperature change trend Determine whether the temperature change trend is a temperature maintenance trend; When the temperature change trend is a temperature maintenance trend; If the heating device is in a heating state, and the temperature value within the second preset time period is greater than or equal to the first temperature threshold, then the temperature change trend changes from a maintenance trend to an upward trend, and heating stops after passing the first temperature threshold. If the heating device is in a stopped heating state, and the temperature value within the second preset time is less than or equal to the second temperature threshold, then the temperature change trend changes from a sustained trend to a decreasing-increasing trend. After passing the second temperature threshold, heating is turned on. The second preset time is N times the first preset time, where N is a natural number.

4. The control method for cooking appliances as described in claim 3, characterized in that, When the temperature change trend is opposite to the theoretical temperature change trend, the current operating state of the heating device is maintained.

5. The control method for cooking appliances as described in claim 1, characterized in that, The first preset duration is determined based on the rate of temperature change of the temperature change trend.

6. The method for controlling a cooking appliance as described in claim 5, characterized in that, The first preset duration is inversely correlated with the rate of temperature change corresponding to the temperature change trend.

7. A cooking utensil, characterized in that, The appliance includes a cooking cavity, a temperature sensor, and a heating device, wherein the temperature sensor is used to collect temperature values ​​within the cooking cavity; it also includes a controller connected to the temperature sensor and the heating device, and includes a memory and a processor, wherein the memory stores a computer program, and the processor is used to execute the computer program to perform the control method of the cooking appliance according to any one of claims 1-6.

Images