Cooking appliance, and control method and control device thereof, readable storage medium

Abstract

The application provides a cooking utensil, a control method and a control device thereof, and a readable storage medium. The cooking utensil comprises a switching tube, and the control method comprises the following steps: controlling the switching tube to work at a first preset pulse width; after a first preset time length, controlling the switching tube to work at a second preset pulse width; detecting the collector voltage of the switching tube, and based on the collector voltage being greater than a preset threshold, cyclically adjusting the working pulse width of the switching tube and controlling the switching tube to work at the adjusted working pulse width; and after a second preset time length, controlling the switching tube to continue to work at the first preset pulse width. The control method of the cooking utensil adjusts the working pulse of the switching tube through the relationship between the collector voltage of the switching tube and the preset threshold, can effectively reduce the radiant energy generated by the cooking utensil during the working process, ensures the use safety of the user, does not need to set an additional filter in the cooking utensil, reduces the production cost of the cooking utensil, and is beneficial to the popularization of the cooking utensil.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the control technology of cooking appliances, and in particular, to a cooking appliance and a control method and control device thereof, and a readable storage medium. BACKGROUND

[0002] The cooking appliance with electromagnetic heating function will generate certain radiation when working, which threatens the health of users. In the prior art, an additional filter is usually arranged in the cooking appliance to absorb the energy of the radiation of the cooking appliance. However, when the working power of the cooking appliance is large, the energy of the radiation generated by the cooking appliance will also be strong. At this time, the filter needs to be increased to absorb the energy of the radiation, which greatly increases the production cost of the cooking appliance, and is not conducive to the promotion and popularization of the cooking appliance. SUMMARY

[0003] Embodiments of the present application aim to at least solve one of the technical problems existing in the prior art.

[0004] To this end, a first aspect of the present application provides a control method of a cooking appliance.

[0005] A second aspect of the present application provides a control device of a cooking appliance.

[0006] A third aspect of the present application provides a control device of a cooking appliance.

[0007] A fourth aspect of the present application provides a readable storage medium.

[0008] A fifth aspect of the present application provides a cooking appliance.

[0009] Therefore, a first aspect of the present application provides a control method of a cooking appliance, the cooking appliance comprising a switching tube, the control method comprising: controlling the switching tube to work at a first preset pulse width; after a first preset time length, controlling the switching tube to work at a second preset pulse width; detecting a collector voltage of the switching tube, based on the collector voltage being greater than a preset threshold, cyclically adjusting a working pulse width of the switching tube, and controlling the switching tube to work at the adjusted working pulse width; and after a second preset time length, controlling the switching tube to continue to work at the first preset pulse width.

[0010] The control method of the cooking utensil can be used for controlling a large-power cooking utensil with electromagnetic heating function, such as an electromagnetic electric rice cooker, an electromagnetic stove and the like. In the working process of the large-power cooking utensil with electromagnetic heating function, a magnetic field is generated by passing current through a coil, and when the magnetic force in the magnetic field passes through the bottom of a pot containing iron, numerous small eddy currents are generated, so that the pot itself can be heated at a high speed, and then the food in the pot is heated. In the above heating process, the cooking utensil generates a certain radiation, and the greater the power of the cooking utensil, the stronger the radiation energy generated, which can cause a certain threat to human health. The control method of the cooking utensil provided by the present application adjusts the working mode of the switch tube in the electromagnetic heating device of the cooking utensil to reduce the radiation energy generated by the cooking utensil in the working process, avoids the harm caused by the radiation of the cooking utensil to the human body, improves the use safety of the cooking utensil, and further improves the overall performance of the cooking utensil.

[0011] Specifically, the control method of the cooking utensil controls the switch tube in the electric heating device to work through three working stages. The first working stage is to control the switch tube to work at a first preset pulse width, and the working time length of the first working stage is a first preset time length. In this working stage, the value range of the first preset time length can be 2ms-3ms. If the first preset time length, i.e. the working time length of the first working stage, is too long, the elimination effect of the radiation energy will be reduced, and the reduction amount of the radiation energy will be small, which is harmful to human health.

[0012] Further, the second working stage is to first control the switch tube to work at a second preset pulse width, then detect the collector voltage of the switch tube, and in the case that the voltage value of the collector voltage is greater than a preset threshold, adjust the working pulse width of the switch tube and control the switch tube to work at the adjusted working pulse width, then detect the collector voltage of the switch tube again, and in the case that the collector voltage is greater than the preset threshold, continue to adjust the working pulse width of the switch tube, and so on, until the working time length of the second working stage accumulates to a second preset time length, and the switch tube enters the next working stage. The second preset pulse width can be 10us-15us, the working time length of the second working stage is a second preset time length, and the second preset time length can be 3ms-4ms. Similarly, if the second preset time length, i.e. the working time length of the second working stage, is too long, the elimination effect of the radiation energy will be reduced, and the reduction amount of the radiation energy will be small, which is harmful to human health.

[0013] In addition, it should be noted that the preset threshold is a preset flip voltage of a comparator used for comparing the collector voltage of the switch tube, and when the collector voltage of the switch tube is greater than the flip voltage of the comparator, the comparator will flip, at which time an interrupt will be generated, and the working pulse width of the switch tube is adjusted by setting relevant programs at the interrupt. The preset threshold, i.e., the flip voltage of the comparator, can be selected according to the size of the radiation energy, and the flip voltage and the radiation energy are positively correlated, i.e., the higher the flip voltage value, the greater the radiation energy. Therefore, by limiting the size of the flip voltage of the comparator and thus limiting the collector voltage, the amount of radiation energy generated by the cooking appliance during the working process can be effectively reduced.

[0014] Specifically, the preset threshold can be in a range of 900V-1000V. In addition, the working pulse width of the switch tube and the radiation energy generated by the cooking appliance are also positively correlated, and by limiting the size of the collector voltage and adjusting the working pulse width of the switch tube through the collector voltage, the radiation energy generated by the cooking appliance during the working process can be further reduced, the health of the user is ensured, and thus the overall performance of the cooking appliance is ensured.

[0015] Further, the third working phase is to control the switch tube to continue working at the first preset pulse width. In this working phase, the working pulse width of the switch tube returns to the first preset pulse width and continues to work at the first preset pulse width until the adjustment is completed and the next adjustment process is entered.

[0016] Through the above three working phases, by adjusting the working pulse of the switch tube and limiting the size of the collector voltage of the switch tube during the working process of the cooking appliance, the radiation energy generated by the cooking appliance during the working process can be greatly reduced, and the overall performance of the cooking appliance is improved.

[0017] Therefore, the control method of the cooking appliance provided by the present application can effectively reduce the radiation energy generated by the cooking appliance during the working process by limiting the collector voltage of the switch tube and adjusting the working pulse of the switch tube, avoid the harm of the radiation energy generated by the cooking appliance to the human body, ensure the use safety of the user, and improve the reliability of the cooking appliance. At the same time, by using the control method of the cooking appliance provided by the present application to reduce the radiation energy generated by the cooking appliance, it is not necessary to set an additional filter in the cooking appliance to absorb the radiation energy generated by the cooking appliance during the working process, which reduces the production cost of the cooking appliance and is conducive to the promotion and popularization of the cooking appliance.

[0018] In addition, the control method of the cooking appliance provided by the present application has the following additional technical features:

[0019] In a possible design, before the switch tube is controlled to work at the first preset pulse width, the method further includes: detecting mains power passing through the cooking utensil and confirming that the mains power is at a zero-crossing point.

[0020] In this design, before the step of controlling the switch tube to work at the working pulse width of the first preset pulse width, the mains power passing through the cooking utensil is detected, and it is determined whether the mains power is at a zero-crossing point. Only when the mains power passing through the cooking utensil is at a zero-crossing point, the switch tube is controlled to work at the first preset pulse width. The mains power is a power-frequency alternating current, and the mains voltage standard in China is 220 V and the frequency is 50 Hz. During the alternating process of the mains power, the point at which the mains power alternates positively and negatively is a zero-crossing point, and at this time, the value of the mains power is 0. The mains power is a sine wave with a period of 20 ms. Every 10 ms, the mains power experiences a zero-crossing point. Once the mains power is at a zero-crossing point, the working mode of the switch tube is adjusted by the above method to reduce the radiant energy generated by the cooking utensil during the working process. That is, in the control method of the cooking utensil provided in the present application, the adjustment of the working mode of the switch tube is periodic, and the period is half of the mains power alternating period, that is, the working mode of the cooking utensil is adjusted once every 10 ms until the cooking is completed.

[0021] In addition, the adjustment period of the working mode of the switch tube is 10 ms, and the first preset time length and the second preset time length are both part of the adjustment period. Therefore, in order to achieve a better effect of eliminating radiant energy, the first preset time length and the second preset time length should not be too long.

[0022] In a possible design, after the switch tube is controlled to work at the first preset pulse width, the method further includes: controlling a timing component of the cooking utensil to start timing; and controlling the timing component to stop timing based on the first timing time length of the timing component being equal to the first preset time length.

[0023] In this design, the timing component of the cooking utensil is controlled to start timing at the same time when the switch tube is controlled to work at the working pulse width of the first preset pulse width. When the first timing time length of the timing component reaches the first preset time length, the timing component is controlled to stop timing. That is, the working time length of the first working stage is timed by the timing component of the cooking utensil, and after the timing is completed, the switch tube is controlled to enter the next working stage, that is, the second working stage. In this way, the working time length of the switch tube is timed by the timing component, and then the working mode of the switch tube is adjusted in time, which ensures the accuracy of the control of the working time length of the switch tube and improves the accuracy of the working of the switch tube. The purpose of reducing the radiant energy generated by the cooking utensil can be better achieved, the threat of the radiant energy to human health is avoided, and the overall performance of the cooking utensil is improved.

[0024] In a possible design, the working pulse width of the switching tube is adjusted, and the switching tube is controlled to work at the adjusted working pulse width, specifically including: detecting the collector voltage of the switching tube; based on the collector voltage being greater than a preset threshold, reducing the second preset pulse width by a preset pulse width value as the adjusted working pulse width; controlling the switching tube to work at the adjusted working pulse width for a third preset time length; returning to the step of detecting the collector voltage of the switching tube until the collector voltage is less than the preset threshold.

[0025] In this design, in the second working stage, before the working pulse width of the switching tube, i.e., the second preset pulse width, is adjusted, the collector voltage of the switching tube is first detected and compared with the preset threshold, in the case where the preset threshold is less than the detected collector voltage, the value of the second preset pulse width is reduced by a preset pulse width value, and the adjusted working pulse width is taken as a new second preset pulse width, and the switching tube is controlled to work at the new second preset pulse width for a third preset time length, i.e., in the case where the preset threshold is less than the collector voltage, the working pulse width of the switching tube, i.e., the second preset pulse width, is adjusted according to the rule of “second preset pulse width = second preset pulse width – preset pulse width value”. The value range of the second preset pulse width can be 10 μs to 15 μs, in order to increase the number of adjustments to improve the accuracy of the working pulse width adjustment, the value of the preset pulse width value should be significantly smaller than the value of the second preset pulse width, specifically, the value range of the preset pulse width value can be 1 μs to 2 μs. Further, in order to increase the number of adjustments to improve the accuracy of the working pulse width adjustment, the value of the third preset time length should also be significantly smaller than the value of the second preset time length.

[0026] Further, after the working pulse width of the switching tube, i.e., the second preset pulse width, is adjusted as described above, the collector voltage of the switching tube is continuously detected and compared with the preset threshold, in the case where the preset threshold is still less than the detected collector voltage, the value of the second preset pulse width is continuously reduced by the preset pulse width value, and the adjusted working pulse width is taken as a new second preset pulse width again, and the switching tube is controlled to work at the new second preset pulse width. This cycle is repeated to realize the cyclic adjustment of the working pulse width of the second working stage until the preset threshold is greater than the voltage value of the detected collector voltage, and the detection of the collector voltage of the switching tube is stopped. In this way, by continuous detection and adjustment, the working pulse width of the switching tube is limited, the working pulse width of the switching tube is reduced, and thus the radiant energy generated by the cooking appliance during the working process can be effectively reduced, the personal safety of the user is ensured, and the overall performance of the cooking appliance is improved.

[0027] In a possible design, after the switching tube is controlled to work at the second preset pulse width, the method further includes: controlling the timing component to start timing again; based on the second timing time length of the timing component being equal to the second preset time length, controlling the timing component to stop timing and stop detecting the collector voltage.

[0028] In this design, the timing assembly of the cooking appliance is controlled to start timing again when the control switch tube starts working at the second preset pulse width, and the timing assembly stops timing and detecting the collector voltage when the second timing duration of the timing assembly reaches the second preset duration. That is, the timing assembly of the cooking appliance is used to time the duration of the second working stage, and the control switch tube enters the next working stage, i.e., the third working stage, after timing. In this way, the timing assembly is used to time the working duration of the control switch tube, and the working mode of the control switch tube is adjusted in a timely manner, thereby ensuring the accuracy of the control and adjustment of the working mode of the control switch tube, improving the accuracy of the operation control of the cooking appliance, and better achieving the purpose of reducing the radiant energy generated by the cooking appliance, avoiding the threat of radiant energy to human health, and improving the overall performance of the cooking appliance.

[0029] In a possible design, the cooking appliance further includes a heating device for heating the pot body. After the control switch tube continues to work at the first preset pulse width, the control method further includes detecting the temperature of the pot body, and controlling the heating device to stop heating the pot body based on the temperature of the pot body being greater than or equal to a preset temperature.

[0030] In this design, the control method of the cooking appliance further includes detecting the temperature of the pot body, and controlling the heating device to stop heating the pot body when it is detected that the temperature of the pot body reaches a preset temperature, and the cooking is completed. The preset temperature is a temperature that can represent the completion of cooking, and can be set according to the actual cooking situation.

[0031] On the one hand, the temperature inside the pot body can be detected. During the cooking process, the temperature inside the pot body can represent the temperature of the food in the cooking appliance. When the temperature inside the pot body reaches a certain value, it can be indicated that the cooking is completed. At this time, the preset temperature can be set to the temperature at which the food in the cooking appliance is in a micro-boiling state. Once the temperature inside the pot body reaches the preset temperature, the cooking appliance is controlled to change its working parameters in a timely manner, so as to control the heating device to stop heating the pot body. In this way, the cooking appliance can quickly and accurately identify the micro-boiling state of the food in the pot body and stop working in a timely manner, thereby effectively solving the problem of liquid overflow inside the pot body, ensuring the safety of the cooking appliance, and improving the overall performance of the cooking appliance.

[0032] In another aspect, the temperature of the bottom of the pot can also be detected. During the cooking process, the temperature of the bottom of the pot is usually higher than the temperature of the food in the cooking appliance. When the temperature of the bottom of the pot reaches a certain value, it indicates that the cooking is complete. At this time, since the temperature of the bottom of the pot is higher than the temperature of the food in the cooking appliance, the above-mentioned preset temperature should be higher than the temperature of the food in the cooking appliance in a micro-boiling state. Once the temperature of the bottom of the pot reaches the preset temperature, the cooking appliance is controlled to timely change its working parameters, so as to control the heating device to stop heating the pot. In this way, the cooking appliance can quickly and accurately identify the cooking state of the food in the pot and timely stop working, thereby effectively solving the problems of food overflow and dry burning of the food in the pot, further ensuring the safety of the cooking appliance and improving the overall performance of the cooking appliance. The second aspect of the present application provides a control device of a cooking appliance, the cooking appliance comprising a switching tube, and the control device comprising: a processing unit configured to control the switching tube to work at a first preset pulse width for a first preset time length; the processing unit is further configured to control the switching tube to work at a second preset pulse width, and in the case that the working time length is less than a second preset time length, detect the collector voltage of the switching tube, based on the collector voltage being greater than a preset threshold, cyclically adjust the working pulse width of the switching tube, and control the switching tube to work at the adjusted working pulse width; and the processing unit is further configured to control the switching tube to continue to work at the first preset pulse width.

[0033] The control device of the cooking appliance provided by the present application can be used to control a large-power cooking appliance with electromagnetic heating function, such as an electromagnetic electric rice cooker, an electromagnetic stove, a microwave oven, etc. During the working process of the large-power cooking appliance with electromagnetic heating function, a magnetic field is usually generated by the current passing through the coil, and when the magnetic force in the magnetic field passes through the bottom of the pot containing iron, countless small eddy currents are generated, so that the pot itself can be heated at a high speed, thereby heating the food in the pot. During the above-mentioned heating process, the cooking appliance generates a certain radiation, and the greater the power of the cooking appliance, the stronger the radiation energy generated by the cooking appliance, which can cause a certain threat to human health. The control device of the cooking appliance provided by the present application adjusts the working mode of the switching tube in the cooking appliance to reduce the radiation energy generated by the cooking appliance during the working process, thereby avoiding the harm caused by the radiation of the cooking appliance to the human body, improving the use safety of the cooking appliance, and further improving the overall performance of the cooking appliance.

[0034] Specifically, the control device of the cooking appliance comprises a processing unit, and the switching tube in the cooking appliance is controlled by the processing unit to work in three working stages. In the first working stage, the processing unit controls the switching tube to work at a first preset pulse width, and the working duration of the first working stage is a first preset duration. In this working stage, the first preset duration can be 2-3 ms. If the first preset duration, i.e., the working duration of the first working stage, is too long, the elimination effect of the radiation energy will be reduced, the reduction amount of the radiation energy will be small, and the health of the human body will be harmed.

[0035] Further, in the second working stage, the processing unit controls the switching tube to work at a second preset pulse width, detects the collector voltage of the switching tube, adjusts the working pulse width of the switching tube and controls the switching tube to work at the adjusted working pulse width when the voltage value of the collector voltage is greater than a preset threshold, then detects the collector voltage of the switching tube again, continues to adjust the working pulse width of the switching tube when the collector voltage is greater than the preset threshold, and so on, until the working duration of the second working stage accumulates to a second preset duration, and the switching tube enters the next working stage. The second preset pulse width can be 10-15 s, the working duration of the second working stage is the second preset duration, and the second preset duration can be 3-4 ms. Similarly, if the second preset duration, i.e., the working duration of the second working stage, is too long, the elimination effect of the radiation energy will be reduced, the reduction amount of the radiation energy will be small, and the health of the human body will be harmed.

[0036] In addition, it should be noted that the preset threshold is the flip voltage of a comparator used for comparing the collector voltage of the switching tube. When the collector voltage of the switching tube is greater than the flip voltage of the comparator, the comparator will flip, at which time an interrupt will be generated, and the working pulse width of the switching tube is adjusted by setting relevant programs at the interrupt. The preset threshold, i.e., the flip voltage of the comparator, can be selected according to the size of the radiation energy. The flip voltage and the radiation energy are positively correlated, i.e., the higher the flip voltage value, the greater the radiation energy. Therefore, by limiting the size of the flip voltage of the comparator to control the collector voltage of the switching tube, the amount of the radiation energy generated by the cooking appliance during the working process can be effectively reduced. Specifically, the preset threshold can be 900-1000 V. In addition, the working pulse width of the switching tube and the radiation energy generated by the cooking appliance are also positively correlated. By limiting the size of the collector voltage and adjusting the working pulse width of the switching tube through the collector voltage, the radiation energy generated by the cooking appliance during the working process can be further reduced, the health of the human body is ensured, and the overall performance of the cooking appliance is ensured.

[0037] Further, the third working stage is that the processing unit controls the switch tube to continue working at the first preset pulse width. In this working stage, the working pulse width of the switch tube returns to the first preset pulse width and continues to work at the first preset pulse width until the adjustment ends and the next adjustment process starts.

[0038] Through the above three working stages, in the working process of the cooking appliance, the processing unit adjusts the working pulse of the switch tube and limits the collector voltage of the switch tube, which can greatly reduce the radiation energy generated by the cooking appliance in the working process and improve the overall performance of the cooking appliance.

[0039] Therefore, the cooking appliance control device provided by the present application can effectively reduce the radiation energy generated by the cooking appliance in the working process by limiting the collector voltage of the switch tube and adjusting the working pulse of the switch tube, thereby avoiding the harm of the radiation energy generated by the cooking appliance to human health, ensuring the safety of the user, and improving the reliability of the cooking appliance. At the same time, the cooking appliance control device provided by the present application can reduce the radiation energy generated by the cooking appliance without the need to set an additional filter in the cooking appliance to absorb the radiation energy generated by the cooking appliance in the working process, thereby reducing the production cost of the cooking appliance and facilitating the promotion and popularization of the cooking appliance.

[0040] In addition, the cooking appliance control device provided by the present application has the following additional technical features:

[0041] In a possible design, the processing unit is further configured to detect the mains power passing through the cooking appliance and confirm that the mains power is at a zero-crossing point.

[0042] In this design, before the step of controlling the switch tube to work at the first preset pulse width by the processing unit, the mains power passing through the cooking appliance is detected and it is determined whether the mains power is at a zero-crossing point. Only when the mains power passing through the cooking appliance is at a zero-crossing point, the processing unit controls the switch tube to work at the first preset pulse width. The mains power is a power frequency alternating current, and the mains voltage standard in China is 220V and the frequency is 50Hz. In the alternating process of the mains power, the point of positive and negative alternation of the mains power is the zero-crossing point, and the value of the mains power is 0 at this time. The mains power is a sinusoidal waveform with a period of 20ms. Once every 10ms, the zero-crossing point is experienced once, and the working mode of the switch tube in the cooking appliance is adjusted by the above method to reduce the radiation energy generated by the cooking appliance in the working process. That is, the adjustment of the working mode of the switch tube by the cooking appliance control device provided by the present application is periodic, and the period is half of the mains power alternating period, that is, the working mode of the switch tube is adjusted once every 10ms until the cooking ends.

[0043] In addition, the adjustment period of the working mode of the switch tube is 10 ms, and the first preset time length and the second preset time length are both partial time lengths of the adjustment period. Therefore, in order to achieve a better radiation energy elimination effect, the first preset time length and the second preset time length should not be too long.

[0044] In a possible design, the processing unit can also be configured to: control the timing component of the cooking appliance to start timing; and control the timing component to stop timing based on the first timing duration of the timing component being equal to the first preset time length.

[0045] In this design, the processing unit controls the timing component of the cooking appliance to start timing while controlling the switch tube to start working at the first preset working pulse width, and controls the timing component to stop timing when the first timing duration of the timing component reaches the first preset time length. That is, the working duration of the first working stage is timed by the timing component of the cooking appliance, and the switch tube enters the second working stage after the timing ends. In this way, the working duration of the switch tube is timed by the timing component, and the working mode of the switch tube is adjusted in time, thereby improving the accuracy of the working duration control of the switch tube and the accuracy of the working of the switch tube, and better achieving the purpose of reducing the radiation energy generated by the cooking appliance, avoiding the threat of radiation energy to human health, and improving the overall performance of the cooking appliance.

[0046] In a possible design, the processing unit can specifically be configured to: detect the collector voltage of the switch tube; reduce the second preset pulse width by a preset pulse width value as an adjusted working pulse width based on the collector voltage being greater than a preset threshold; control the switch tube to work at the adjusted working pulse width for a third preset time length; and return to the step of detecting the collector voltage of the switch tube until the collector voltage is less than the preset threshold.

[0047] In the design, in the second working stage, before the processing unit adjusts the working pulse width of the switch tube, i.e., the second preset pulse width, the collector voltage of the switch tube is first detected and compared with the preset threshold value, and in the case where the preset threshold value is less than the detected collector voltage, the value of the second preset pulse width is reduced by a preset pulse width value, and the adjusted working pulse width is taken as a new second preset pulse width, and the switch tube is controlled to work at the new second preset pulse width for a third preset time length, i.e., in the case where the preset threshold value is less than the collector voltage, the working pulse width of the switch tube, i.e., the second preset pulse width, is adjusted according to the rule of "second preset pulse width = second preset pulse width - preset pulse width value". The value range of the second preset pulse width can be 10 μs to 15 μs, and in order to increase the number of adjustments to improve the accuracy of the working pulse width adjustment, the value of the preset pulse width value should be significantly smaller than the value of the second preset pulse width, and specifically, the value range of the preset pulse width value can be 1 μs to 2 μs. Further, in order to increase the number of adjustments to improve the accuracy of the working pulse width adjustment, the value of the third preset time length should also be significantly smaller than the value of the second preset time length.

[0048] Further, after the working pulse width of the switch tube, i.e., the second preset pulse width, is adjusted, the processing unit will continue to detect the collector voltage of the switch tube and compare it with the preset threshold value, and in the case where the preset threshold value is still less than the detected collector voltage, the value of the second preset pulse width will continue to be reduced by the preset pulse width value, and the adjusted working pulse width will be taken as a new second preset pulse width again, and the switch tube will be controlled to work at the new second preset pulse width, and this cycle will continue, to realize the cyclic adjustment of the working pulse width of the second working stage, until the preset threshold value is greater than the voltage value of the detected collector voltage, and the detection of the collector voltage of the switch tube is stopped. In this way, by continuous detection and adjustment of the processing unit, the working pulse width of the switch tube is limited, the working pulse width of the switch tube is reduced, and the radiant energy generated by the cooking appliance during the working process can be effectively reduced, the personal safety of the user is ensured, and the overall performance of the cooking appliance is improved.

[0049] In a possible design, the processing unit can also be used to control the timing component to start timing again, and control the timing component to stop timing and stop detecting the collector voltage based on the second timing length of the timing component being equal to the second preset time length.

[0050] In the design, when the processing unit controls the switch tube to start working at the second preset pulse width, the timing assembly of the cooking appliance starts timing again. When the timing time of the timing assembly, i.e., the second timing duration, reaches the second preset duration, the timing assembly stops timing and stops detecting the collector voltage. That is, the timing assembly of the cooking appliance is used to time the working duration of the second working stage. After timing, the switch tube enters the next working stage, i.e., the third working stage. In this way, the timing assembly is used to control the working duration of the switch tube, and the working mode of the switch tube is adjusted in time, thereby ensuring the accuracy of the working duration control of the switch tube and improving the accuracy of the working mode control and adjustment of the switch tube, so that the purpose of reducing the radiant energy generated by the cooking appliance can be better achieved, the threat of radiant energy to human health is avoided, and the overall performance of the cooking appliance is improved.

[0051] In a possible design, the cooking appliance further includes a heating device for heating the pot body. The processing unit can be further configured to: detect the temperature of the pot body; and control the heating device to stop heating the pot body based on the temperature of the pot body being greater than or equal to a preset temperature. In this design, the processing unit can further detect the temperature of the pot body. When it is detected that the temperature of the pot body reaches the preset temperature, the heating device is controlled to stop heating the pot body, and the cooking is completed.

[0052] In one aspect, the processing unit can detect the temperature inside the pot body. During the cooking process, the temperature inside the pot body can represent the temperature of the food in the cooking appliance. When the temperature inside the pot body reaches a certain value, it can be indicated that the cooking is completed. At this time, the preset temperature can be set as the temperature at which the food in the cooking appliance is in a micro-boiling state. Once the temperature inside the pot body reaches the preset temperature, the cooking appliance is controlled to change its working parameters in time, so that the heating device is controlled to stop heating the pot body. In this way, the cooking appliance can quickly and accurately identify the micro-boiling state of the food in the pot body and stop working in time, thereby effectively solving the problem of liquid overflow inside the pot body, ensuring the safety of the cooking appliance, and improving the overall performance of the cooking appliance.

[0053] In another aspect, the processing unit can also detect the temperature of the bottom of the pot. During the cooking process, the temperature of the bottom of the pot can be higher than the temperature of the food in the cooking appliance. When the temperature of the bottom of the pot reaches a certain value, it can indicate that the cooking is complete. At this time, since the temperature of the bottom of the pot is higher than the temperature of the food in the cooking appliance, the above-mentioned preset temperature should be higher than the temperature of the food in the cooking appliance in a micro-boiling state. Once the temperature of the bottom of the pot reaches the preset temperature, the cooking appliance is controlled to timely change its working parameters, so as to control the heating device to stop heating the pot. In this way, the cooking appliance can quickly and accurately identify the cooking state of the food in the pot and timely stop working, thereby effectively solving the problems of food overflow and dry burning of the food in the pot, further ensuring the safety of the cooking appliance and improving the overall performance of the cooking appliance.

[0054] The third aspect of the present application provides a control device of a cooking appliance. The control device comprises a memory storing instructions or programs, and a processor. When the processor executes the programs or instructions stored in the memory, the steps of the control method of the cooking appliance as defined in any possible implementation of the first aspect of the present application are implemented. Therefore, the control device of the cooking appliance according to the third aspect of the present application has all the beneficial effects of the control method of the cooking appliance as defined in any possible implementation of the first aspect of the present application, which will not be described in detail herein.

[0055] The fourth aspect of the present application provides a readable storage medium storing programs or instructions. When the programs or instructions are executed by a processor, the steps of the control method of the cooking appliance as defined in any possible implementation of the first aspect of the present application are implemented. Therefore, the readable storage medium according to the fourth aspect of the present application has all the beneficial effects of the control method of the cooking appliance as defined in any possible implementation of the first aspect of the present application, which will not be described in detail herein.

[0056] The fifth aspect of the present application provides a cooking appliance comprising a control device of a cooking appliance as defined in the third aspect of the present application and a readable storage medium as defined in the fourth aspect of the present application. Therefore, the cooking appliance according to the fifth aspect of the present application has all the beneficial effects of the control device of the cooking appliance as defined in the third aspect of the present application and the readable storage medium as defined in the fourth aspect of the present application, which will not be described in detail herein.

[0057] In addition, the cooking appliance provided by the above technical solution of the present application also has the following additional technical features:

[0058] In a possible design, the cooking appliance further comprises a cover body, a pot, a first temperature controller arranged in the cover body and configured to detect the temperature in the pot, and a second temperature controller arranged in the pot and configured to detect the temperature of the bottom of the pot.

[0059] In the design, the cooking utensil further comprises a pot body, a cover body, a first temperature controller and a second temperature controller. The first temperature controller is arranged on the cover body to detect the temperature inside the pot body. During the cooking process, the temperature inside the pot body can represent the temperature of the food in the cooking utensil. When the first temperature controller detects that the temperature inside the pot body reaches a certain temperature value, it can be indicated that the cooking is completed. At this time, the heating of the pot body can be stopped to prevent problems such as food overflow and food dry burning caused by excessive heating, thereby ensuring the safety of the cooking utensil and improving the overall performance of the cooking utensil.

[0060] Further, in the design, the second temperature controller is arranged at the bottom of the pot body to detect the temperature at the bottom of the pot body. During the cooking process, the temperature at the bottom of the pot body is higher than the temperature of the food in the cooking utensil. When the second temperature controller detects that the temperature at the bottom of the pot body reaches a certain temperature value, it can be indicated that the cooking is completed. At this time, the heating of the pot body can be stopped to prevent problems such as food overflow and food dry burning caused by excessive heating, thereby further ensuring the safety of the cooking utensil and improving the overall performance of the cooking utensil.

[0061] In a possible design, the cooking utensil further comprises a switching tube, and a detection device electrically connected to the control device, for detecting the mains power passing through the cooking utensil and / or for detecting the collector voltage of the switching tube.

[0062] In the design, the cooking utensil further comprises a switching tube and a detection device, wherein the detection device is electrically connected to the control device. The detection device can detect the mains power passing through the cooking utensil and the collector voltage of the switching tube, and then feed the data detected by it to the control device, so that the control device adjusts the working mode of the switching tube to reduce the radiant energy generated by the cooking utensil during the working process, thereby avoiding the harm caused by the radiation of the cooking utensil to the human body, improving the safety of the cooking utensil, and further improving the overall performance of the cooking utensil.

[0063] In a possible design, the cooking utensil further comprises a heating device for heating the pot body; based on the first temperature detected by the first temperature controller being greater than or equal to a first preset temperature, the control device controls the heating device to stop heating the pot body; and / or based on the second temperature detected by the second temperature controller being greater than or equal to a second preset temperature, the control device controls the heating device to stop heating the pot body.

[0064] In the design, the cooking utensil further comprises a heating device for heating the pot body, and the control device controls the heating device to stop working so as to stop heating the pot body when the first temperature detected by the first temperature controller, i.e. the temperature inside the pot body, is greater than or equal to the first preset temperature. The first preset temperature is the temperature at which the food in the cooking utensil is in a micro-boiling state. In this way, the cooking utensil can quickly and accurately identify the micro-boiling state of the food in the pot body and stop working in time, thereby effectively solving the problem of liquid overflow in the pot body, ensuring the safety of the cooking utensil in use and improving the overall performance of the cooking utensil.

[0065] Further, in the design, the control device also controls the heating device to stop working so as to stop heating the pot body when the second temperature detected by the second temperature controller, i.e. the temperature at the bottom of the pot body, is greater than or equal to the second preset temperature. Since the temperature inside the pot body is lower than the temperature at the bottom of the pot body during cooking, the second preset temperature should be higher than the temperature at which the food in the cooking utensil is in a micro-boiling state, i.e. the second preset temperature is greater than the first preset temperature. In this way, the cooking utensil can quickly and accurately identify the cooking state of the food in the pot body and stop working in time, thereby effectively solving the problems of food overflow and dry burning of food in the pot body, further ensuring the safety of the cooking utensil in use and improving the overall performance of the cooking utensil.

[0066] Additional aspects and advantages of the present application will be set forth in part in the description that follows, and in part will become apparent to those having ordinary skill in the art upon examination of the following or can be learned from practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0067] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings, wherein:

[0068] Figure 1 A schematic flow chart of a control method of a cooking utensil according to an embodiment of the present application is shown;

[0069] Figure 2 A schematic block diagram of a control device of a cooking utensil according to an embodiment of the present application is shown;

[0070] Figure 3 A schematic block diagram of a control device of a cooking utensil according to an embodiment of the present application is shown;

[0071] Figure 4 A schematic block diagram of a cooking utensil according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0072] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0073] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0074] The following reference Figures 1 to 4 The present invention provides a detailed description of the control method, control device, readable storage medium, and cooking appliance provided by the present invention.

[0075] An embodiment of the first aspect of the present invention provides a method for controlling a cooking appliance.

[0076] It should be noted that the execution subject of the cooking appliance control method provided in the first aspect of the present invention can be a control device of the cooking appliance. This control device can be a functional module and / or a functional entity within the cooking appliance, and can be specifically selected according to actual usage requirements. The embodiments of the present invention do not impose specific limitations. To more clearly describe the cooking appliance control method provided in the first aspect of the present invention, the following embodiments will executor the control method using a control device as an example.

[0077] Example 1:

[0078] like Figure 1 As shown, this embodiment proposes a cooking appliance control method, wherein the cooking appliance includes a switch tube. The control method includes the following steps S102 to S10.

[0079] The cooking appliance control method proposed in this invention can be used to control high-power cooking appliances with electromagnetic heating functions, such as induction rice cookers, induction cookers, and microwave ovens. High-power cooking appliances with electromagnetic heating functions typically generate a magnetic field by passing an electric current through a coil during operation. When the magnetic force within the magnetic field passes through the bottom of an iron-containing pot, countless small eddy currents are generated, causing the pot itself to heat up rapidly, thus heating the food inside. During this heating process, the cooking appliance produces a certain amount of radiation, and the higher the power of the appliance, the stronger the radiation energy, which can pose a threat to human health. This invention reduces the radiation energy generated by the cooking appliance during operation by adjusting the working mode of the switching transistor, avoiding harm to the human body from the radiation, improving the safety of using the cooking appliance, and thus enhancing the overall performance of the cooking appliance.

[0080] Specifically, the cooking appliance control method proposed in the present application controls the switching tube to work in three working stages. The first working stage can include the following step S102:

[0081] Step S102, control the switching tube to work at a first preset pulse width for a first preset time length.

[0082] In this working stage, the control device controls the switching tube to work at a working pulse width of the first preset pulse width, and the working time length is the first preset time length. The value range of the first preset time length can be 2ms-3ms. If the first preset time length, i.e., the working time length of the first working stage, is too long, the elimination effect of the radiation energy will be reduced, the reduction amount of the radiation energy will be small, and the health will be harmed.

[0083] Further, the second working stage can include the following steps S104-S108:

[0084] Step S104, control the switching tube to work at a second preset pulse width.

[0085] Step S106, detect the collector voltage of the switching tube and determine whether the collector voltage is greater than a preset threshold.

[0086] Step S108, cyclically adjust the working pulse width of the switching tube, and control the switching tube to work at the adjusted working pulse width.

[0087] In this working stage, the control device first controls the switching tube to work at a working pulse width of the second preset pulse width, then detects the collector voltage of the switching tube, adjusts the working pulse width of the switching tube when the voltage value of the collector voltage is greater than a preset threshold, and controls the switching tube to work at the adjusted working pulse width. After that, the control device detects the collector voltage of the switching tube again, and continues to adjust the working pulse width of the switching tube when the collector voltage is greater than the preset threshold. This cycle continues until the working time length of the second working stage accumulates to the second preset time length, and the switching tube enters the next working stage.

[0088] The second preset pulse width can be 10μs-15μs, the working time length of the second working stage is the second preset time length, and the second preset time length can be 3ms-4ms. Similarly, if the second preset time length, i.e., the working time length of the second working stage, is too long, the elimination effect of the radiation energy will be reduced, the reduction amount of the radiation energy will be small, and the health will be harmed.

[0089] In addition, it should be noted that the preset threshold is a preset flip voltage of a comparator used for comparing the collector voltage of the switch tube. When the collector voltage of the switch tube is greater than the flip voltage of the comparator, the comparator flips, and at this time, an interrupt is generated. The working pulse width of the switch tube is adjusted by setting relevant programs at the interrupt. The preset threshold, i.e., the flip voltage of the comparator, can be selected according to the size of the radiation energy. The flip voltage and the radiation energy are positively correlated, i.e., the higher the flip voltage value, the greater the radiation energy. Therefore, by limiting the size of the flip voltage of the comparator and thus limiting the collector voltage, the amount of radiation energy generated by the cooking appliance during the working process can be effectively reduced. In specific embodiments, the preset threshold can have a value range of 900V-1000V.

[0090] In addition, it can be understood that the working pulse width of the switch tube and the radiation energy generated by the cooking appliance also have a positive correlation. By limiting the size of the collector voltage and adjusting the working pulse width of the switch tube through the collector voltage, the radiation energy generated by the cooking appliance during the working process can be further reduced, the health of the user is ensured, and thus the overall performance of the cooking appliance is ensured.

[0091] Further, the third working phase can include the following step S110:

[0092] In step S110, the switch tube is controlled to continue working at the first preset pulse width.

[0093] In this working phase, the working pulse width of the switch tube returns to the first preset pulse width and continues to work at the first preset pulse width until the adjustment is completed and the next adjustment process is entered.

[0094] In this embodiment, through the above three working phases, the working pulse width of the switch tube is adjusted and the size of the collector voltage of the switch tube is limited during the working process of the cooking appliance, so that the radiation energy generated by the cooking appliance during the working process can be greatly reduced, and the overall performance of the cooking appliance is improved.

[0095] Therefore, the cooking appliance control method proposed in this embodiment can effectively reduce the radiation energy generated by the cooking appliance during the working process by limiting the collector voltage of the switch tube and adjusting the working pulse of the switch tube, avoid the harm of the radiation energy generated by the cooking appliance to the human body, ensure the use safety of the user, and improve the reliability of the cooking appliance. At the same time, the radiation energy generated by the cooking appliance is reduced by the cooking appliance control method proposed in the present application, without the need to set an additional filter in the cooking appliance to absorb the radiation energy generated by the cooking appliance during the working process, thereby reducing the production cost of the cooking appliance and being conducive to the promotion and popularization of the cooking appliance.

[0096] Embodiment 2:

[0097] Further, in this embodiment, before the step S102, the control method can further include the following step S101.

[0098] In the step S101, the mains power passing through the cooking utensil is detected, and it is determined whether the mains power is at the zero-crossing point.

[0099] In this embodiment, before the step of controlling the switch tube to work at the first preset pulse width, the mains power passing through the cooking utensil is detected, and it is determined whether the mains power is at the zero-crossing point. Only when the mains power passing through the cooking utensil is at the zero-crossing point, the switch tube is controlled to work at the first preset pulse width.

[0100] It can be understood that the mains power is the power frequency alternating current, and the mains power voltage standard in China is 220V, and the frequency is 50Hz, and the alternating frequency is 20ms. In the alternating process of the mains power, the point of positive and negative alternation of the mains power is the zero-crossing point, and at this time, the mains power value is 0. The mains power is a sine wave with a period of 20ms, and once every half cycle, that is, 10ms, the zero-crossing point is experienced. Once the mains power is at the zero-crossing point, the working mode of the switch tube in the cooking utensil is adjusted by the above method to reduce the radiant energy generated by the cooking utensil in the working process. That is, in the cooking utensil control method proposed in this embodiment, the adjustment of the working mode of the switch tube is periodic, and the adjustment period is half of the mains power alternating period, that is, the working mode of the switch tube is adjusted once every 10ms until the cooking is finished.

[0101] In addition, the adjustment period of the working mode of the switch tube is 10ms, and the first preset time length and the second preset time length are both part of the adjustment period. Therefore, in order to achieve better radiation energy elimination effect, the values of the first preset time length and the second preset time length should not be too long, otherwise the radiation energy elimination effect will be reduced.

[0102] Embodiment 3:

[0103] Further, in this embodiment, after the step S102, the control method can further include the following steps S103a and S103b.

[0104] In the step S103a, the timing component of the cooking utensil is controlled to start timing.

[0105] In the step S103b, when the first timing length of the timing component is equal to the first preset time length, the timing component is controlled to stop timing.

[0106] In this embodiment, when the control switch tube starts to work at the first preset pulse width, the control device controls the timing assembly of the cooking utensil to start timing, and when the timing time of the timing assembly, i.e., the first timing duration, reaches the first preset duration, the timing of the timing assembly is stopped. That is, the timing assembly of the cooking utensil is used to time the working duration of the first working stage, and after the timing is completed, the control switch tube enters the next working stage, i.e., the second working stage. In this way, the working duration of the control switch tube is controlled by the timing assembly, and the working mode of the control switch tube is adjusted in time, thereby ensuring the accuracy of the control switch tube working duration control, improving the accuracy of the control switch tube operation control, and better achieving the purpose of reducing the radiant energy generated by the cooking utensil, avoiding the threat of radiant energy to human health, and improving the overall performance of the cooking utensil.

[0107] Embodiment 4:

[0108] On the basis of embodiment 1, further, in this embodiment, the step S108 can specifically include the following steps S108a to S108d.

[0109] Step S108a, detecting the collector voltage of the control switch tube.

[0110] Step S108b, in the case where the collector voltage is greater than the preset threshold, reducing the second preset pulse width by a preset pulse width value.

[0111] Step S108c, controlling the control switch tube to work at the adjusted second preset pulse width for a third preset duration.

[0112] In this embodiment, in the second working stage, before adjusting the working pulse width, i.e., the second preset pulse width, of the control switch tube, the collector voltage of the control switch tube is first detected and compared with the preset threshold, and in the case where the preset threshold is less than the detected collector voltage, the value of the second preset pulse width is reduced by a preset pulse width, and the new second preset pulse width is used as the adjusted working pulse width. That is, in the case where the preset threshold is less than the collector voltage, the working pulse width, i.e., the second preset pulse width, of the control switch tube is adjusted according to the rule of "second preset pulse width = second preset pulse width - preset pulse width value". The value of the second preset pulse width can be 10 μs to 15 μs, and in order to increase the number of adjustments to improve the accuracy of the working pulse width adjustment, the value of the preset pulse width should be significantly smaller than the value of the second preset pulse width, and in a specific embodiment, the value of the preset pulse width can be 1 μs to 2 μs. Further, the second preset duration can be 3 ms-4 ms, and in order to increase the number of adjustments to improve the accuracy of the working pulse width adjustment, the value of the third preset duration should also be significantly smaller than the value of the second preset duration.

[0113] Step S108d, return to step S108a until the preset threshold is greater than the collector voltage.

[0114] In this embodiment, further, after the adjustment of the working pulse width of the switch tube, i.e., the second preset pulse width, the control device continues to detect the collector voltage of the switch tube and compare it with the preset threshold. If the preset threshold is still less than the detected collector voltage, the value of the second preset pulse width is further reduced by the preset pulse width, and the adjusted new second preset pulse width is used as the working pulse width of the switch tube, and the switch tube is controlled to work at the current working pulse width for a third preset time length. This cycle continues until the preset threshold is greater than the voltage value of the detected collector voltage, and the detection of the collector voltage of the switch tube is stopped. In this way, by continuous detection and adjustment, the working pulse width of the switch tube in the cooking appliance is limited, the working pulse width of the switch tube is reduced, and the radiant energy generated by the cooking appliance during work can be effectively reduced, the personal safety of the user is ensured, and the overall performance of the cooking appliance is improved.

[0115] Embodiment 5:

[0116] Based on embodiment 1, further, in this embodiment, after step S104, the control method can further include steps S105a and S105b.

[0117] Step S105a, control the timing assembly to start timing again.

[0118] Step S105b, in the case where the second timing length of the timing assembly is equal to the second preset time length, control the timing assembly to stop timing and stop detecting the collector voltage.

[0119] In this embodiment, while controlling the switch tube to start working at the working pulse width of the second preset pulse width, the timing assembly of the cooking appliance is controlled to start timing again. When the timing time of the timing assembly, i.e., the second timing length, reaches the second preset time length, the timing assembly is controlled to stop timing and stop detecting the collector voltage. That is, the working time length of the second working stage is timed by the timing assembly of the cooking appliance, and after timing, the switch tube enters the next working stage, i.e., the third working stage. In this way, the working time length of the second working stage of the switch tube is controlled by the timing assembly, and the working mode of the switch tube is adjusted in time, ensuring the accuracy of the working time length control of the switch tube, and improving the accuracy of the working control of the switch tube, which can better achieve the purpose of reducing the radiant energy generated by the cooking appliance, avoid the threat of radiant energy to human health, and improve the overall performance of the cooking appliance.

[0120] Embodiment 6:

[0121] Further based on the embodiment 1, in this embodiment, the cooking utensil further comprises a heating device for heating the pot body, and the control method further comprises the following steps S112 and S114.

[0122] Step S112, detecting the temperature of the pot body.

[0123] Step S114, in the case that the temperature of the pot body is greater than or equal to the preset temperature, controlling the heating device to stop heating the pot body.

[0124] In this embodiment, the control method further comprises detecting the temperature of the pot body, and in the case that the temperature of the pot body reaches the preset temperature, controlling the heating device to stop heating the pot body, and the cooking is finished. The preset temperature is a temperature that can represent the completion of cooking, and can be set according to the actual cooking situation.

[0125] In this embodiment, on the one hand, the temperature inside the pot body can be detected, and in the cooking process, the temperature inside the pot body can represent the temperature of the food in the cooking utensil. When the temperature inside the pot body reaches a certain value, it can be indicated that the cooking is completed. At this time, the above-mentioned preset temperature can be set as the temperature of the food in the cooking utensil under the condition of micro-boiling. Once the temperature inside the pot body reaches the preset temperature, the cooking utensil is controlled to change its working parameters in time, so as to control the heating device to stop heating the pot body. In this way, the cooking utensil can quickly and accurately identify the micro-boiling state of the food in the pot body, and stop working in time, so as to effectively solve the problem of liquid overflow in the pot body, ensure the safety of the use of the cooking utensil, and improve the overall performance of the cooking utensil.

[0126] In this embodiment, on the other hand, the temperature of the bottom of the pot body can also be detected, and in the cooking process, the temperature of the bottom of the pot body is usually higher than the temperature of the food in the cooking utensil. When the temperature of the bottom of the pot body reaches a certain value, it can be indicated that the cooking is completed. At this time, since the temperature of the bottom of the pot body is higher than the temperature of the food in the cooking utensil, the above-mentioned preset temperature should be higher than the temperature of the food in the cooking utensil under the condition of micro-boiling. Once the temperature of the bottom of the pot body reaches the preset temperature, the cooking utensil is controlled to change its working parameters in time, so as to control the heating device to stop heating the pot body. In this way, the cooking utensil can quickly and accurately identify the cooking state of the food in the pot body, and stop working in time, so as to effectively solve the problems of food overflow and dry burning of food in the pot body, further ensure the safety of the use of the cooking utensil, and improve the overall performance of the cooking utensil.

[0127] The embodiment of the second aspect of the application proposes a cooking utensil control device 200.

[0128] Embodiment 7:

[0129] As shown in Figure 2 The embodiment provides a cooking utensil control device 200, wherein the cooking utensil comprises a switching tube, and the control device comprises:

[0130] a processing unit 202, configured to control the switching tube to work at a first preset working pulse width for a first preset time length.

[0131] The processing unit 202 is further configured to control the switching tube to work at a second preset working pulse width.

[0132] Further, the processing unit 202 is further configured to detect a voltage value at a collector of the switching tube, and in a case where the voltage value at the collector is greater than a preset threshold value, cyclically adjust a working pulse width of the switching tube, and control the switching tube to work at a new working pulse width after the adjustment.

[0133] Further, the processing unit 202 is further configured to control the switching tube to continue to work at the first preset working pulse width until the adjustment is completed.

[0134] The cooking utensil control device 200 provided by the embodiment can be used for controlling a high-power cooking utensil with an electromagnetic heating function, such as an electromagnetic electric rice cooker, an electromagnetic stove, a microwave oven and the like. In a working process of the high-power cooking utensil with the electromagnetic heating function, a magnetic field is generated by a current passing through a coil, when a magnetic force in the magnetic field passes through a bottom of a pot containing iron, a large number of small eddy currents are generated, so that the pot itself can be heated at a high speed, and then food in the pot is heated. In the above heating process, the cooking utensil generates a certain radiation, and the greater the power of the cooking utensil, the stronger the radiation energy generated by the cooking utensil, which can cause a certain threat to the health of a human body. The cooking utensil control device 200 provided by the embodiment adjusts a working mode of a switching tube in the cooking utensil to reduce the radiation energy generated by the cooking utensil in the working process, avoids the harm caused by the radiation of the cooking utensil to the human body, improves the use safety of the cooking utensil, and further improves the overall performance of the cooking utensil.

[0135] Specifically, the cooking utensil control device 200 provided by the embodiment comprises the processing unit 202, and the switching tube in the cooking utensil is controlled to work in three working stages through the processing unit 202. The first working stage is that the processing unit 202 controls the switching tube to work at a first preset working pulse width, and the working time length of the first working stage is a first preset time length. In the working stage, the first preset time length can be 2ms-3ms, if the first preset time length, that is, the working time length of the first working stage, is too long, the elimination effect of the radiation energy is reduced, and the reduction amount of the radiation energy is small, which is harmful to the health of the human body.

[0136] Further, the second working stage is that the processing unit 202 controls the switch tube to work at a second preset pulse width; then, the voltage value at the collector of the switch tube is detected, and in the case that the voltage value at the collector is greater than a preset threshold value, the working pulse width of the switch tube is adjusted, and the switch tube is controlled to work at a new working pulse width; then, the voltage value at the collector of the switch tube is detected again, and in the case that the preset threshold value is still less than the voltage value at the collector, the working pulse width of the switch tube is continuously adjusted, and the cycle is repeated until the working time length of the second working stage accumulatively reaches a second preset time length, and the switch tube enters the next working stage. The second preset pulse width can be 10-15 μs, the working time length of the second working stage is the second preset time length, and the second preset time length can be 3-4 ms. Similarly, if the second preset time length, i.e., the working time length of the second working stage, is too long, the elimination effect of the radiation energy will be reduced, so that the reduction amount of the radiation energy is small, and the health of the human body is harmed.

[0137] In addition, it should be noted that the preset threshold value is the flip voltage of the comparator preset for comparing the voltage at the collector of the switch tube. When the voltage value at the collector of the switch tube is greater than the flip voltage of the comparator, the comparator will flip, at which time an interrupt will be generated. The working pulse width of the switch tube is adjusted by setting relevant programs at the interrupt. The preset threshold value, i.e., the flip voltage of the comparator, can be selected according to the size of the radiation energy. The flip voltage and the radiation energy are positively correlated, i.e., the higher the flip voltage value, the greater the radiation energy. Therefore, by limiting the size of the flip voltage of the comparator and then controlling the collector voltage of the switch tube, the amount of the radiation energy generated by the cooking appliance during the working process can be effectively reduced. Specifically, the preset threshold value can be 900-1000 V. In addition, the working pulse width of the switch tube and the radiation energy generated by the cooking appliance are also positively correlated. By limiting the size of the collector voltage and adjusting the working pulse width of the switch tube through the collector voltage, the radiation energy generated by the cooking appliance during the working process can be further reduced, the health of the human body is ensured, and the overall performance of the cooking appliance is ensured.

[0138] Further, the third working stage is that the processing unit 202 controls the switch tube to continue to work at the first preset pulse width. In this working stage, the working pulse width of the switch tube returns to the first preset pulse width, and the switch tube continues to work at the current working pulse width until the adjustment is completed and the next adjustment process is entered.

[0139] Through the above three working stages, in the working process of the cooking utensil, the working pulse of the switching tube is adjusted and the voltage value at the collector of the switching tube is limited by the processing unit 202, which can greatly reduce the radiation energy generated by the cooking utensil in the working process, and improve the overall performance of the cooking utensil.

[0140] Therefore, the cooking utensil control device 200 proposed in the embodiment can effectively reduce the radiation energy generated by the cooking utensil in the working process by limiting the voltage value at the collector of the switching tube and adjusting the working pulse of the switching tube, avoiding the harm of the radiation energy generated by the cooking utensil to human health, ensuring the use safety of the user, and improving the reliability of the cooking utensil. At the same time, the cooking utensil control device 200 proposed in the embodiment is used to reduce the radiation energy generated by the cooking utensil, without the need to set an additional filter in the cooking utensil to absorb the radiation energy generated by the cooking utensil in the working process, reducing the production cost of the cooking utensil, and being conducive to the promotion and popularization of the cooking utensil.

[0141] In this embodiment, further, the processing unit 202 can also be used to control the timing component of the cooking utensil to start timing, and control the timing component to stop timing when the first timing duration of the timing component is equal to the first preset duration.

[0142] In this embodiment, while the processing unit 202 controls the switching tube to start working at the first preset pulse width, the processing unit 202 also controls the timing component of the cooking utensil to time the working duration of the first working stage, and controls the switching tube to enter the next working stage, i.e. the second working stage, after timing. In this way, the working duration of the switching tube is timed by the timing component, and the switching tube is controlled to adjust the working mode in time, ensuring the accuracy of the working duration control of the switching tube, and improving the accuracy of the working of the switching tube, which can better achieve the purpose of reducing the radiation energy generated by the cooking utensil, avoid the threat of the radiation energy to human health, and improve the overall performance of the cooking utensil.

[0143] Further, in this embodiment, when the processing unit 202 controls the switch tube to start working at the working pulse width of the second preset pulse width, the processing unit 202 also controls the timing assembly of the cooking appliance to start timing again. When the timing time of the timing assembly, i.e., the second timing length, reaches the second preset length, the processing unit 202 controls the timing assembly to stop timing and stop detecting the voltage value at the collector. That is, the processing unit 202 times the working length of the second working stage by the timing assembly of the cooking appliance, and after timing ends, controls the switch tube to enter the next working stage, i.e., the third working stage. In this way, the working length of the switch tube is controlled by the timing assembly, and then the working mode of the switch tube is adjusted in time, thereby ensuring the accuracy of the control of the working length of the switch tube, improving the accuracy of the control and adjustment of the working mode of the switch tube, and better achieving the purpose of reducing the radiant energy generated by the cooking appliance, avoiding the threat of radiant energy to human health, and improving the overall performance of the cooking appliance.

[0144] Embodiment 8:

[0145] On the basis of embodiment 7, further, in this embodiment, the processing unit 202 can also be used to detect the mains power of the cooking appliance and determine whether the mains power is in the zero-crossing state. Based on the mains power being in the zero-crossing state, the processing unit 202 controls the switch tube to start working at the working pulse width of the first preset pulse width.

[0146] In this embodiment, before the step of controlling the switch tube to work at the working pulse width of the first preset pulse width by the processing unit 202, the mains power of the cooking appliance is detected, and it is determined whether the mains power is in the zero-crossing state. Only when the mains power of the cooking appliance is in the zero-crossing state, the processing unit 202 controls the switch tube to start working at the working pulse width of the first preset pulse width.

[0147] It can be understood that the mains power is the power frequency alternating current, and the mains voltage standard in China is 220V and alternates at a frequency of 50Hz. In the alternating process of the mains power, the point of positive and negative alternation of the mains power is the zero-crossing point, and at this time, the mains power value is 0. The mains power is a sinusoidal waveform with a period of 20ms. Every 10ms, it will experience a zero-crossing point. Once the mains power is in the zero-crossing point, the working mode of the switch tube in the cooking appliance is adjusted by the above method to reduce the radiant energy generated by the cooking appliance in the working process. That is, the adjustment of the working mode of the switch tube by the cooking appliance control device 200 proposed in this embodiment is periodic, and the period is half of the mains power alternating period, i.e., the working mode of the switch tube is adjusted once every 10ms until the cooking ends.

[0148] In addition, the adjustment period of the working mode of the switch tube is 10 ms, and the first preset time length and the second preset time length are both partial time lengths of the adjustment period. Therefore, in order to achieve a better radiation energy elimination effect, the values of the first preset time length and the second preset time length should not be too long.

[0149] Embodiment 9:

[0150] On the basis of Embodiment 7, in this embodiment, the processing unit 202 can further be configured to: detect the voltage value at the collector of the switch tube; in a case where the preset threshold value is less than the voltage value at the collector, decrease the value of the second preset pulse width by a preset pulse width value; control the switch tube to work at the adjusted new second preset pulse width for a third preset time length; and return to the step of detecting the voltage value at the collector of the switch tube until the preset threshold value is greater than the voltage value at the collector.

[0151] In this embodiment, in the second working phase, before the processing unit 202 adjusts the working pulse width of the switch tube, i.e., the second preset pulse width, the voltage value at the collector of the switch tube is first detected and compared with the preset threshold value. In a case where the preset threshold value is less than the detected voltage value at the collector, the value of the second preset pulse width is decreased by a preset pulse width value, and the adjusted working pulse width is taken as a new second preset pulse width. The switch tube is controlled to work at the new second preset pulse width for a third preset time length. That is, in a case where the preset threshold value is less than the voltage value at the collector, the working pulse width of the switch tube, i.e., the second preset pulse width, is adjusted according to the rule of “second preset pulse width = second preset pulse width - preset pulse width value”. The value range of the second preset pulse width can be 10 μs to 15 μs. In order to increase the number of adjustments and improve the accuracy of the working pulse width adjustment, the value of the preset pulse width value should be significantly smaller than the value of the second preset pulse width. Specifically, the value range of the preset pulse width value can be 1 μs to 2 μs. Further, in order to increase the number of adjustments and improve the accuracy of the working pulse width adjustment, the value of the third preset time length should also be significantly smaller than the value of the second preset time length.

[0152] Further, after adjusting the working pulse width of the switch tube, i.e., the second preset pulse width, the processing unit 202 continues to detect the voltage value at the collector of the switch tube and compare it with the preset threshold value. If the preset threshold value is still less than the detected voltage value at the collector, the value of the second preset pulse width is continuously reduced by a preset pulse width value, and the adjusted working pulse width is taken as a new second preset pulse width again, and the switch tube is controlled to work at the new second preset pulse width. This cycle is repeated to realize the cyclic adjustment of the working pulse width of the switch tube in the second working stage until the preset threshold value is greater than the detected voltage value at the collector, and the detection of the voltage value at the collector of the switch tube is stopped. In this way, by continuous detection and adjustment of the processing unit 202, the working pulse width of the switch tube is limited, and the working pulse width of the switch tube is reduced, thereby effectively reducing the radiant energy generated by the cooking appliance during work, ensuring the personal safety of the user, and improving the overall performance of the cooking appliance.

[0153] Embodiment 10:

[0154] On the basis of Embodiment 7, further, in this embodiment, the cooking appliance further comprises a heating device for heating the pot in the cooking appliance. On this basis, the processing unit 202 can further detect the temperature of the pot, and when it is detected that the temperature of the pot reaches a preset temperature, the heating device is controlled to stop heating the pot, and this cooking is ended. The preset temperature is a temperature that can represent the completion of cooking, which can be set according to the actual cooking situation.

[0155] On the one hand, the processing unit 202 can detect the temperature inside the pot. During cooking, the temperature inside the pot can represent the temperature of the food in the cooking appliance. When the temperature inside the pot reaches a certain value, it can be indicated that this cooking is completed. At this time, the above-mentioned preset temperature can be set as the temperature at which the food in the cooking appliance is in a micro-boiling state. Once the temperature inside the pot reaches the preset temperature, the cooking appliance is controlled to change its working parameters in time, so as to control the heating device to stop heating the pot. In this way, the cooking appliance can quickly and accurately identify the micro-boiling state of the food in the pot and stop working in time, thereby effectively solving the problem of liquid overflow inside the pot, ensuring the safety of the cooking appliance, and improving the overall performance of the cooking appliance.

[0156] On the other hand, the processing unit 202 can also detect the temperature of the bottom of the pot. During cooking, the temperature of the bottom of the pot will be higher than the temperature of the food in the cooking appliance. When the temperature of the bottom of the pot reaches a certain value, it indicates that the cooking is complete. At this time, since the temperature of the bottom of the pot is higher than the temperature of the food in the cooking appliance, the preset temperature should be higher than the temperature of the food in the cooking appliance when it is in a simmering state. Once the temperature of the bottom of the pot reaches the preset temperature, the cooking appliance is controlled to change its own operating parameters in time, thereby controlling the heating device to stop heating the pot. In this way, the cooking appliance can quickly and accurately identify the cooking state of the food in the pot and stop working in time, thereby effectively solving the problems of food overflowing and dry burning inside the pot, further ensuring the safety of using the cooking appliance and improving the overall performance of the cooking appliance.

[0157] A third aspect of the present invention provides a cooking appliance control device 300.

[0158] Example 11:

[0159] like Figure 3 As shown, this embodiment proposes a cooking appliance control device 300, which includes: a memory 302 storing instructions or programs; and a processor 304. When the processor 304 executes the program or instructions stored in the memory 302, it can implement the steps of the cooking appliance control method as defined in any embodiment of the first aspect of the present invention. Therefore, the cooking appliance control device 300 proposed in this embodiment has all the beneficial effects of the cooking appliance control method as defined in any embodiment of the first aspect of the present invention, which will not be described in detail here.

[0160] In specific embodiments, the memory may include a large-capacity storage device for data or instructions. For example, and not limitingly, the memory may include a hard disk drive (HDD), a floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory may include removable or non-removable (or fixed) media. Where appropriate, the memory may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, the memory is a non-volatile solid-state memory. In a particular embodiment, the memory includes read-only memory (ROM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0161] The processor can include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or can be configured as one or more integrated circuits that implement embodiments of the present application.

[0162] Embodiments of the fourth aspect of the present application provide a readable storage medium.

[0163] Embodiment 12:

[0164] The embodiment provides a readable storage medium, and the readable storage medium stores a program or instructions. The program or instructions, when executed by a processor, can implement the steps of the control method of the cooking appliance as defined in any one of the embodiments of the first aspect of the present application. Therefore, the readable storage medium provided in the embodiment has all the beneficial effects of the control method of the cooking appliance as defined in any one of the embodiments of the first aspect of the present application, and will not be described in detail herein.

[0165] In specific embodiments, the readable storage medium can include any medium capable of storing or transmitting information. Examples of the readable storage medium include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, and the like. The code segment can be downloaded via a computer network such as the Internet, an intranet, or the like.

[0166] Embodiments of the fifth aspect of the present application provide a cooking appliance 400.

[0167] Embodiment 13:

[0168] As shown in Figure 4 The embodiment provides a cooking appliance 400, which includes the cooking appliance control device 300 as defined in the embodiments of the third aspect of the present application, and the readable storage medium as defined in the embodiments of the fourth aspect of the present application. Therefore, the cooking appliance 400 provided in the embodiment has all the beneficial effects of the cooking appliance control device 300 as defined in the embodiments of the third aspect of the present application and the readable storage medium as defined in the embodiments of the fourth aspect of the present application, and will not be described in detail herein.

[0169] Embodiment 14:

[0170] On the basis of embodiment 13, further, in this embodiment, the cooking appliance 400 further includes a pot body, a cover body, a first temperature controller, and a second temperature controller.

[0171] The first temperature controller is arranged on the cover to detect the temperature inside the pot. During the cooking process, the temperature inside the pot can represent the temperature of the food in the cooking appliance. When the first temperature controller detects that the temperature inside the pot reaches a certain temperature value, it indicates that the cooking is completed. At this time, the heating of the pot can be stopped to prevent over-heating, food overflow, dry burning and other problems, thereby ensuring the safety of the cooking appliance 400 and improving the overall performance of the cooking appliance 400.

[0172] Further, in this embodiment, the second temperature controller is arranged at the bottom of the pot to detect the temperature at the bottom of the pot. During the cooking process, the temperature at the bottom of the pot is higher than the temperature of the food in the cooking appliance. When the second temperature controller detects that the temperature at the bottom of the pot reaches a certain temperature value, it indicates that the cooking is completed. At this time, the heating of the pot can be stopped to prevent over-heating, food overflow, dry burning and other problems, thereby further ensuring the safety of the cooking appliance 400 and improving the overall performance of the cooking appliance 400.

[0173] In this embodiment, further, the cooking appliance 400 further comprises a switching tube and a detection device, wherein the detection device is electrically connected to the control device. The detection device can detect the voltage value of the mains power passing through the cooking appliance 400 and the collector of the switching tube, and then feed the detected data to the control device, so that the control device adjusts the working mode of the switching tube to reduce the radiation energy generated by the cooking appliance 400 during operation, thereby avoiding the harm caused by the radiation of the cooking appliance 400 to the human body, improving the safety of the cooking appliance 400, and further improving the overall performance of the cooking appliance 400.

[0174] In this embodiment, further, the cooking appliance 400 further comprises a heating device for heating the pot of the cooking appliance 400.

[0175] In this embodiment, when the first temperature detected by the first temperature controller, i.e., the temperature inside the pot, is greater than or equal to the first preset temperature, the control device controls the heating device to stop working, so that the pot is no longer heated. The first preset temperature is the temperature at which the food in the cooking appliance 400 is in a micro-boiling state. In this way, the cooking appliance 400 can quickly and accurately identify the micro-boiling state of the food in the pot and stop working in time, thereby effectively solving the problem of liquid overflow in the pot, ensuring the safety of the cooking appliance 400 and improving the overall performance of the cooking appliance 400.

[0176] Furthermore, in this embodiment, if the second temperature detected by the second thermostat, i.e., the temperature at the bottom of the pot, is greater than or equal to the second preset temperature, the control device will also control the heating device to stop working, so that it no longer heats the pot. Since the temperature inside the pot is lower than the temperature at the bottom during cooking, the second preset temperature should be higher than the temperature at which the food in the cooking appliance 400 is in a simmering state; that is, the second preset temperature is greater than the first preset temperature. In this way, the cooking appliance 400 can quickly and accurately identify the cooking state of the food inside the pot and stop working in time, thereby effectively solving the problems of food overflowing and dry burning inside the pot, further ensuring the safety of using the cooking appliance 400 and improving the overall performance of the cooking appliance 400.

[0177] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0178] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0179] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for controlling a cooking utensil, characterized in that, The cooking appliance includes a switch tube, and the control method includes: The switching transistor is controlled to operate under a first preset pulse width; After the first preset duration, the switching transistor is controlled to operate under the second preset pulse width; The collector voltage of the switching transistor is detected. Based on the collector voltage being greater than a preset threshold, the operating pulse width of the switching transistor is cyclically adjusted, and the switching transistor is controlled to operate under the adjusted operating pulse width. After the second preset duration, the switching transistor is controlled to continue working under the first preset pulse width; The step of cyclically adjusting the operating pulse width of the switching transistor and controlling the switching transistor to operate under the adjusted operating pulse width specifically includes: Detect the collector voltage of the switching transistor; Based on the fact that the collector voltage is greater than the preset threshold, the second preset pulse width is reduced by a preset pulse width value as the adjusted working pulse width, and the value of the preset pulse width value is less than the value of the second preset pulse width. The switching transistor is controlled to operate for a third preset duration under the adjusted working pulse width; Return to the step of detecting the collector voltage of the switching transistor until the collector voltage is less than the preset threshold.

2. The control method for cooking appliances according to claim 1, characterized in that, Before controlling the switching transistor to operate at a first preset pulse width, the method further includes: The mains power supply through the cooking appliance is detected, and it is confirmed that the mains power supply is in a zero-crossing state.

3. The control method for cooking appliances according to claim 1 or 2, characterized in that, After controlling the switching transistor to operate under a first preset pulse width, the method further includes: The timing component of the cooking appliance is controlled to start timing; Based on the fact that the first timing duration of the timing component is equal to the first preset duration, the timing component is controlled to stop timing.

4. The control method for cooking appliances according to claim 3, characterized in that, After controlling the switching transistor to operate under the second preset pulse width, the method further includes: Control the timing component to start timing again; Based on the fact that the second timing duration of the timing component is equal to the second preset duration, the timing component is controlled to stop timing and the detection of the collector voltage is stopped.

5. A control device for a cooking utensil, characterized in that, The cooking appliance includes a switch tube, and the control device includes: The processing unit is used to control the switching transistor to operate for a first preset duration under a first preset pulse width; The processing unit is also used to control the switching transistor to work under a second preset pulse width after the first preset duration, and to detect the collector voltage of the switching transistor when the working duration is less than the second preset duration, and to cyclically adjust the working pulse width of the switching transistor based on the collector voltage being greater than a preset threshold, and to control the switching transistor to work under the adjusted working pulse width. The processing unit is also used to control the switching transistor to continue working under the first preset pulse width after the second preset time. The processing unit is further specifically used for: Detect the collector voltage of the switching transistor; Based on the fact that the collector voltage is greater than the preset threshold, the second preset pulse width is reduced by a preset pulse width value as the adjusted working pulse width, and the value of the preset pulse width value is less than the value of the second preset pulse width. The switching transistor is controlled to operate for a third preset duration under the adjusted working pulse width; Return to the step of detecting the collector voltage of the switching transistor until the collector voltage is less than the preset threshold.

6. The control device for a cooking appliance according to claim 5, characterized in that, The processing unit is also used for: The mains power supply through the cooking appliance is detected, and it is confirmed that the mains power supply is in a zero-crossing state.

7. A control device for a cooking utensil, characterized in that, The control device includes: Memory, which stores instructions or programs; A processor, which, when executing the program or instructions stored in the memory, implements the steps of the control method for a cooking appliance as described in any one of claims 1 to 4.

8. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the control method for a cooking appliance as described in any one of claims 1 to 4.

9. A cooking utensil, characterized in that, include: The control device for the cooking appliance as described in claim 7; The readable storage medium as described in claim 8.

10. The cooking utensil according to claim 9, characterized in that, The cooking appliance also includes: Cover; Pot body; A first temperature controller is located on the lid and is used to detect the temperature inside the pot. A second temperature controller is located on the pot body and is used to detect the temperature at the bottom of the pot body.

11. The cooking utensil according to claim 10, characterized in that, The cooking appliance also includes: Switching transistor; A detection device, electrically connected to the control device, is used to detect the mains power passing through the cooking appliance and / or to detect the collector voltage of the switching transistor.

12. The cooking utensil according to claim 11, characterized in that, The cooking appliance also includes: A heating device for heating the pot body; Based on the first temperature detected by the first temperature controller being greater than or equal to a first preset temperature, the control device controls the heating device to stop heating the pot body; and / or Based on the second temperature detected by the second thermostat being greater than or equal to the second preset temperature, the control device controls the heating device to stop heating the pot body.

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