Electric cooking appliances, their control methods, control devices, and storage media

Abstract

This invention discloses an electric cooking appliance, its control method and control device, and a storage medium. The method includes: when the electric cooking appliance is operating at low power, if it is determined that the power supply of the electric cooking appliance is distorted, compensating for the working conduction angle of the electric cooking appliance and determining the actual operating power of the electric cooking appliance; correcting the compensated working conduction angle according to the actual operating power, so as to adjust the operating power of the electric cooking appliance according to the corrected working conduction angle. The control method of this invention, by compensating and correcting the working conduction angle of the electric cooking appliance when it is determined that the power supply of the electric cooking appliance is distorted, can prevent deviations in heating power from causing food to overflow.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and in particular to a control method for an electric cooker, a control device for an electric cooker, an electric cooker, and a computer-readable storage medium. Background Technology

[0002] Electric cooking appliances such as blenders, slow cookers, and grills mostly use a heating plate (i.e., a heating plate with a heating element). In the final cooking stage, in order to allow the flavors and nutrients of the ingredients and seasonings to be well released into the porridge or soup, making the food more fragrant, it is generally necessary to reduce the heating power and cook continuously at a low power.

[0003] Currently, low-power heating control methods include chopping, wave dropping, and power-adjusting heating (heating for a period of time within a certain cycle, then stopping for a period of time). When using wave dropping heating control, there are problems such as inaccurate heating power control and difficulty in passing harmonics. Therefore, most electric cooking appliances use chopping heating control, which has more precise heating power control.

[0004] However, chopper heating requires high-quality power supply. When the power supply fluctuates or becomes distorted, the chopper power will deviate. When the chopper power deviates, the food will boil violently and overflow onto the table, reducing the user experience. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to provide a control method for an electric cooker that compensates and corrects the operating conduction angle of the cooker when a distortion in the power supply is detected, thereby preventing deviations in heating power that could lead to food overflow.

[0006] The second objective of this invention is to provide a control device for an electric cooking appliance.

[0007] The third objective of this invention is to provide an electric cooking appliance.

[0008] The fourth objective of this invention is to provide a computer-readable storage medium.

[0009] To achieve the above objectives, a first aspect of the present invention provides a control method for an electric cooker, comprising: when the electric cooker is operating at low power, if it is determined that the power supply of the electric cooker is distorted, compensating for the working conduction angle of the electric cooker and determining the actual operating power of the electric cooker; correcting the compensated working conduction angle according to the actual operating power, so as to adjust the operating power of the electric cooker according to the corrected working conduction angle.

[0010] According to the control method of the electric cooker of the present invention, when the electric cooker is operating at low power, if it is determined that the power supply of the electric cooker is distorted, the operating conduction angle of the electric cooker is compensated, the actual operating power of the electric cooker is determined, and the compensated operating conduction angle is corrected according to the actual operating power, so as to adjust the operating power of the electric cooker according to the corrected operating conduction angle. Therefore, this method compensates and corrects the operating conduction angle of the electric cooker when it is determined that the power supply of the electric cooker is distorted, thereby preventing deviations in heating power that could lead to food overflow.

[0011] In addition, the control method of the electric cooking appliance according to the above embodiments of the present invention may also have the following additional technical features:

[0012] According to one embodiment of the present invention, determining that the power supply of an electric cooker is distorted includes: performing zero-crossing detection on the power supply to obtain a zero-crossing signal; determining the operating frequency of the power supply based on the zero-crossing signal; performing voltage detection on the power supply when the operating frequency is normal to obtain a voltage detection value; and determining whether the power supply is distorted based on the zero-crossing signal, the operating frequency, and the voltage detection value.

[0013] According to one embodiment of the present invention, determining whether the power supply is distorted based on the zero-crossing signal, the operating frequency, and the voltage detection value includes: determining the zero-crossing point time based on the zero-crossing signal, determining the detection time of the maximum voltage detection value based on the voltage detection value, and determining the time interval between the zero-crossing point time and the detection time, wherein the zero-crossing point time is before the detection time; determining that the power supply is normal when the time interval and the operating frequency satisfy a preset relationship; and determining that the power supply is distorted when the time interval and the operating frequency do not satisfy the preset relationship.

[0014] According to one embodiment of the present invention, when it is determined that the power supply is normal, the above method further includes: determining the target power of the electric cooker, determining a chopper power adjustment strategy based on the target power, and adjusting the operating power of the electric cooker according to the chopper power adjustment strategy.

[0015] According to one embodiment of the present invention, when it is determined that the power supply is distorted, compensation is made for the working conduction angle of the electric cooker, including: determining a quarter cycle of the power supply according to the working frequency; when the time interval is greater than a quarter cycle, compensating for the working conduction angle by shifting it backward according to a preset time step; when the time interval is less than a quarter cycle, compensating for the working conduction angle by shifting it forward according to a preset time step.

[0016] According to one embodiment of the present invention, after the working conduction angle is compensated by shifting backward according to a preset time step, the compensated working conduction angle is corrected according to the actual operating power, including: determining the target power of the electric cooker; when the target power is greater than the difference between the actual operating power and a preset power threshold, but less than the sum of the actual operating power and the preset power threshold, keeping the compensated working conduction angle unchanged; when the target power is less than or equal to the difference between the actual operating power and the preset power threshold, or when the target power is greater than or equal to the sum of the actual operating power and the preset power threshold, shifting the compensated working conduction angle backward again according to a preset time step, until the target power is greater than the difference between the actual operating power and the preset power threshold, but less than the sum of the actual operating power and the preset power threshold.

[0017] According to another embodiment of the present invention, after the working conduction angle is forward-compensated according to a preset time step, the compensated working conduction angle is corrected according to the actual operating power, including: determining the target power of the electric cooker; when the target power is greater than the difference between the actual operating power and a preset power threshold, but less than the sum of the actual operating power and the preset power threshold, keeping the compensated working conduction angle unchanged; when the target power is less than or equal to the difference between the actual operating power and the preset power threshold, or when the target power is greater than or equal to the sum of the actual operating power and the preset power threshold, the compensated working conduction angle is forward-compensated again according to a preset time step, until the target power is greater than the difference between the actual operating power and the preset power threshold, but less than the sum of the actual operating power and the preset power threshold.

[0018] According to one embodiment of the present invention, determining the actual operating power of an electric cooker includes: acquiring the operating current and effective operating voltage of the electric cooker; and determining the actual operating power based on the operating current and effective operating voltage.

[0019] To achieve the above objectives, a second aspect of the present invention provides a control device for an electric cooker, comprising: a compensation module for compensating the operating conduction angle of the electric cooker when the electric cooker is operating at low power and if it is determined that the power supply of the electric cooker is distorted; a determination module for determining the actual operating power of the electric cooker; and a control module for correcting the compensated operating conduction angle according to the actual operating power, so as to adjust the operating power of the electric cooker according to the corrected operating conduction angle.

[0020] According to the control device of the electric cooker of the present invention, when the electric cooker is operating at low power, if it is determined that the power supply of the electric cooker is distorted, the compensation module compensates for the working conduction angle of the electric cooker. The determination module determines the actual operating power of the electric cooker, and the control module corrects the compensated working conduction angle according to the actual operating power, so as to adjust the operating power of the electric cooker according to the corrected working conduction angle. Therefore, when the power supply of the electric cooker is determined to be distorted, the device compensates for and corrects the working conduction angle of the electric cooker, thereby preventing deviations in heating power that could lead to food overflow.

[0021] To achieve the above objectives, a third aspect of the present invention provides an electric cooking appliance, including a heating plate with a heating element, and further including: a memory, a processor, and a control program for the electric cooking appliance stored in the memory and executable on the processor. When the processor executes the control program for the electric cooking appliance, it implements the above-described control method for the electric cooking appliance.

[0022] According to an embodiment of the present invention, by executing the above-described control method for an electric cooker, it is possible to prevent deviations in heating power that could lead to food spillage.

[0023] To achieve the above objectives, a fourth aspect of the present invention provides a computer-readable storage medium storing a control program for an electric cooker, which, when executed by a processor, implements the above-described control method for the electric cooker.

[0024] The computer-readable storage medium of this invention, by executing the control method of the electric cooker described above, can prevent cooking ingredients from overflowing due to deviations in heating power.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] Figure 1 A flowchart of a control method for a cooker according to an embodiment of the present invention;

[0027] Figure 2 This is a block diagram of the control circuit module of a cooker according to an embodiment of the present invention;

[0028] Figure 3 A flowchart illustrating a control method for an electric cooker according to a specific example of the present invention;

[0029] Figure 4 This is a block diagram of the control device of an electric cooking appliance according to an embodiment of the present invention;

[0030] Figure 5This is a block diagram of an electric cooking appliance according to an embodiment of the present invention. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] The following description, with reference to the accompanying drawings, outlines an embodiment of the present invention, including a control method for an electric cooker, a control device for an electric cooker, an electric cooker, and a computer-readable storage medium.

[0033] In one embodiment of the present invention, the electric cooking appliance can be a stew pot, a blender, a cooking machine, a grill, or other appliance that uses a heating plate (i.e., a heating plate equipped with a heating element).

[0034] Figure 1 This is a flowchart of a control method for an electric cooker according to an embodiment of the present invention.

[0035] like Figure 1 As shown, the control method of the electric cooking appliance in this embodiment of the invention may include the following steps:

[0036] S1, when the electric cooker is operating at low power, if it is determined that the power supply to the electric cooker is distorted, the operating conduction angle of the electric cooker is compensated, and the actual operating power of the electric cooker is determined. Here, low power generally refers to the low power used during the simmering stage of the cooking process.

[0037] S2, the compensated working conduction angle is corrected according to the actual operating power, so as to adjust the operating power of the electric cooker according to the corrected working conduction angle.

[0038] Specifically, when an electric cooker is cooking according to a set cooking program, it needs to use low power heating in the final simmering stage to make the food more fragrant and improve the user experience. When the electric cooker is operating at low power, it is necessary to detect whether the power supply of the electric cooker is distorted in real time. For example, the actual voltage value of the power supply over a period of time can be compared with the standard voltage value. If the actual voltage value is different from the standard voltage value, it is determined that the power supply is distorted; otherwise, it is determined that the power supply is not distorted. Alternatively, the actual current of the power supply over a period of time can be compared with the standard current. If the actual current is different from the standard current, it is determined that the power supply is distorted; otherwise, it is determined that the power supply is not distorted.

[0039] When it is determined that the power supply of the electric cooking appliance is distorted, the working conduction angle of the electric cooking appliance is first compensated. For example, the working conduction angle can be moved forward or backward. Specifically, it can be determined whether to move the working conduction angle forward or backward based on the time interval between the zero crossing time and the actual zero crossing time. The specific method for determining whether to move the working conduction angle forward or backward will be described in detail in the following embodiments, and will not be described in detail here.

[0040] After compensating for the operating conduction angle of the electric cooking appliance, the actual operating power of the appliance is obtained and compared with the set operating power. If the power difference is within the set range, the appliance operates according to the current operating conduction angle (i.e., the compensated operating conduction angle). If the power difference exceeds the set range, the compensated operating conduction angle is corrected again until the power difference is within the set range. The correction method involves shifting the operating conduction angle to the left or right.

[0041] Therefore, the electric cooker can detect power supply distortion in real time when operating at low power. If power supply distortion is detected, the cooker can compensate for the working conduction angle of the cooker. After compensating for the working conduction angle, the cooker can determine whether the compensated working conduction angle needs to be corrected again based on the actual operating power of the cooker. This ensures that the heating power of the cooker does not deviate and prevents food from overflowing due to heating power deviation.

[0042] The specific workflow of the control method of the present invention is described in detail below.

[0043] According to one embodiment of the present invention, determining that the power supply of an electric cooker is distorted includes: performing zero-crossing detection on the power supply to obtain a zero-crossing signal; determining the operating frequency of the power supply based on the zero-crossing signal; performing voltage detection on the power supply when the operating frequency is normal to obtain a voltage detection value; and determining whether the power supply is distorted based on the zero-crossing signal, the operating frequency, and the voltage detection value.

[0044] Furthermore, according to one embodiment of the present invention, determining whether the power supply is distorted based on the zero-crossing signal, the operating frequency, and the voltage detection value includes: determining the zero-crossing point time based on the zero-crossing signal, determining the detection time of the maximum voltage detection value based on the voltage detection value, and determining the time interval between the zero-crossing point time and the detection time, wherein the zero-crossing point time is before the detection time; determining that the power supply is normal when the time interval and the operating frequency satisfy a preset relationship; and determining that the power supply is distorted when the time interval and the operating frequency do not satisfy the preset relationship.

[0045] Specifically, combined Figure 2As shown, AC power is input via the live and neutral wires after passing through the EMC filter circuit. When the electric cooker is powered on by the switching power supply and operates at low power, the zero-crossing detection circuit can detect zero crossings of the power supply to obtain a zero-crossing signal. In an AC circuit, the moment when the voltage waveform transitions from the positive half-axis to the negative half-axis (or from the negative half-axis to the positive half-axis) and crosses zero is called zero-crossing detection. The electrical signal output when the voltage waveform crosses zero is called the zero-crossing signal. The operating frequency of the power supply can be determined based on the zero-crossing signal. For example, the time interval between two adjacent zero-crossing signals may be 10ms. Since AC power is generally a sinusoidal waveform, the voltage or current waveform of AC power starts from zero, gradually rises to a peak, then falls back to zero, reaches its negative maximum value, and then returns to zero. One cycle is 360 degrees, with the positive half-cycle occupying 180 degrees and the negative half-cycle occupying 180 degrees. Therefore, it can be determined that one cycle of alternating current is 20ms, or 0.02s. The MCU (Microcontroller Unit) processing unit can calculate the operating frequency of the power supply as 50Hz based on the formula for calculating the cycle and frequency.

[0046] When the operating frequency of the electric cooker is confirmed to be normal, the voltage can be collected at each moment of the positive half-cycle of an AC sine wave using a voltage detection circuit to obtain voltage detection values. The detection time of the maximum voltage value is then determined to establish the time interval between the zero-crossing point and the detection time. Based on a preset relationship between this time interval and the operating frequency, it can be determined whether the power supply is distorted. Since the zero-crossing point does not change (i.e., the operating frequency is fixed), the time interval between the detection time of the maximum voltage value and the zero-crossing point can be used to determine whether the power supply is distorted. The zero-crossing point is determined by the zero-crossing signal; that is, the point where the AC current is zero is the zero-crossing point.

[0047] For example, if the power supply operates at a frequency of 50Hz, the voltage detection circuit samples the voltage at fixed time intervals (e.g., 0.5ms). The voltage sampled at the first moment is taken as the maximum voltage detection value. If the voltage sampled at the second moment is greater than the voltage sampled at the first moment, the voltage sampled at the second moment is taken as the maximum voltage detection value; otherwise, the voltage sampled at the first moment is still taken as the maximum voltage detection value. Voltage sampling is performed sequentially at the third, fourth, and Nth (N≥1) moments, selecting the maximum voltage detection value and determining the corresponding detection moment. The MCU processing unit calculates the time interval between the detection moment and the zero-crossing point, where the zero-crossing point precedes the detection moment. If the time interval is exactly equal to one-quarter of the power supply's operating frequency, the power supply is normal; if the time interval is not equal to one-quarter of the power supply's operating frequency, the power supply is distorted. Therefore, the operating conduction angle of the electric cooker needs to be compensated to compensate for the influence of power supply distortion.

[0048] According to one embodiment of the present invention, when it is determined that the power supply is normal, the above method further includes: determining the target power of the electric cooker, determining a chopper power adjustment strategy based on the target power, and adjusting the operating power of the electric cooker according to the chopper power adjustment strategy.

[0049] In other words, when the power supply is normal, the target power P of the electric cooker is determined. Based on the target power P, a chopper power adjustment strategy is determined, and the operating power of the electric cooker is adjusted according to the chopper power adjustment strategy. For example, if the electric cooker is an electric slow cooker, when the power supply is normal, the target power of the slow cooker is determined, and a chopper power adjustment strategy is determined based on the target power P. Chopper power adjustment is a relatively common power adjustment technology, which adjusts the operating power of the slow cooker by changing the duty cycle, continuously simmering at a low power to make the food more fragrant and flavorful.

[0050] According to one embodiment of the present invention, when a power supply distortion is determined, compensation is made for the operating conduction angle of the electric cooker, including: determining a quarter-cycle of the power supply based on the operating frequency; when the time interval is greater than a quarter-cycle, shifting the operating conduction angle backward according to a preset time step; and when the time interval is less than a quarter-cycle, shifting the operating conduction angle forward according to a preset time step. The preset time step can be calibrated according to actual conditions; for example, the preset time step can be 0.5 ms.

[0051] Specifically, when the power supply is distorted, the time corresponding to the maximum voltage detection value may be before or after the time corresponding to the maximum voltage detection value when the power supply is normal. When the time corresponding to the maximum voltage detection value may be before the time corresponding to the maximum voltage detection value when the power supply is normal, it indicates that the operating conduction angle needs to be moved forward; when the time corresponding to the maximum voltage detection value may be after the time corresponding to the maximum voltage detection value when the power supply is normal, it indicates that the operating conduction angle needs to be moved backward.

[0052] For example, even if the power supply is distorted, the zero-crossing time will not change. Therefore, the operating frequency of the power supply can be determined based on the zero-crossing time. Timing begins when the first zero-crossing is detected. After detecting multiple zero-crossings, dividing the total time by the number of zero-crossings yields the time interval between two adjacent zero-crossings. This time interval is half a cycle, thus determining the total cycle time. Based on the relationship between cycle and frequency, the operating frequency can be determined. Taking a zero-crossing of 0ms as an example, the operating frequency of the power supply can be calculated to be 50Hz. When the power supply is not distorted, the voltage detection value is maximum at 5ms. When distortion occurs, the voltage detection value may be maximum before or after 5ms. The time difference between the zero-crossing point and the moment corresponding to the detected maximum voltage value is recorded as the time interval. When the time interval is greater than 5ms (one-quarter of a cycle), it means that the maximum voltage detection value is after 5ms. If the chopper heating continues to be activated with the normal zero-crossing delay, the heating power will be too high, resulting in the food boiling violently and overflowing onto the table. In this case, the working conduction angle can be shifted forward to compensate according to the preset time step (e.g., 0.5ms). When the time interval is less than 5ms (one-quarter of a cycle), it means that the maximum voltage detection value is before 5ms. If the chopper heating continues to be activated with the normal zero-crossing delay, the heating power will be too low, resulting in the food not being cooked enough and lacking a fragrant aroma. In this case, the working conduction angle can be shifted backward to compensate according to the preset time step (e.g., 0.5ms).

[0053] It should be noted that, taking the zero-crossing point being after the detection time of the maximum voltage as an example, when the time interval is greater than a quarter of a cycle, the working conduction angle is forward-shifted according to the preset time step for compensation; when the time interval is less than a quarter of a cycle, the working conduction angle is backward-shifted according to the preset time step for compensation.

[0054] According to one embodiment of the present invention, determining the actual operating power of an electric cooker includes: acquiring the operating current and effective operating voltage of the electric cooker; and determining the actual operating power based on the operating current and effective operating voltage.

[0055] Specifically, when the electric cooker is powered on, the operating current I passing through the electric cooker is obtained through the current detection circuit, and the effective operating voltage U of the electric cooker is obtained through the voltage detection circuit. The actual operating power P' of the electric cooker is determined based on the product of the operating current I and the effective operating voltage U.

[0056] According to one embodiment of the present invention, after compensating for the working conduction angle by shifting it backward according to a preset time step, the compensated working conduction angle is corrected according to the actual operating power, including: determining the target power of the electric cooker; when the target power is greater than the difference between the actual operating power and a preset power threshold, but less than the sum of the actual operating power and the preset power threshold, keeping the compensated working conduction angle unchanged; when the target power is less than or equal to the difference between the actual operating power and the preset power threshold, or when the target power is greater than or equal to the sum of the actual operating power and the preset power threshold, shifting the compensated working conduction angle backward again according to a preset time step, until the target power is greater than the difference between the actual operating power and the preset power threshold, but less than the sum of the actual operating power and the preset power threshold. The preset power threshold can be determined according to the actual situation.

[0057] Specifically, when power supply distortion occurs, after compensating for the working conduction angle by shifting it backward according to a preset time step, the compensated working conduction angle still needs to be corrected based on the actual operating power. First, determine the target power (set power) P of the electric cooker. Then, determine whether to correct the working conduction angle based on the relationship between the target power P, the actual operating power P', and the preset power threshold δ. When P'-δ < P < P'+δ, the difference between the target power and the actual power is small, and no further correction of the working conduction angle is needed; that is, the compensated working conduction angle remains unchanged. When P ≤ P'-δ or P ≥ P'+δ, the difference between the target power and the actual power is large, and the compensated working conduction angle needs to be shifted backward again according to the preset time step until P'-δ < P < P'+δ is satisfied. After shifting the working conduction angle backward, adjust the operating power of the electric cooker according to the corrected working conduction angle to ensure the normal operation of the electric cooker.

[0058] According to another embodiment of the present invention, after the working conduction angle is forward-compensated according to a preset time step, the compensated working conduction angle is corrected according to the actual operating power, including: determining the target power of the electric cooker; when the target power is greater than the difference between the actual operating power and a preset power threshold, but less than the sum of the actual operating power and the preset power threshold, keeping the compensated working conduction angle unchanged; when the target power is less than or equal to the difference between the actual operating power and the preset power threshold, or when the target power is greater than or equal to the sum of the actual operating power and the preset power threshold, the compensated working conduction angle is forward-compensated again according to a preset time step, until the target power is greater than the difference between the actual operating power and the preset power threshold, but less than the sum of the actual operating power and the preset power threshold.

[0059] Specifically, when power supply distortion occurs, after compensating for the working conduction angle by shifting it forward according to a preset time step, the compensated working conduction angle still needs to be corrected based on the actual operating power. First, determine the target power (set power) P of the electric cooker. Then, determine whether to correct the working conduction angle based on the relationship between the target power P, the actual operating power P', and the preset power threshold δ. When P'-δ < P < P'+δ, the difference between the target power and the actual power is small, and no further correction of the working conduction angle is needed; that is, the compensated working conduction angle remains unchanged. When P ≤ P'-δ or P ≥ P'+δ, the difference between the target power and the actual power is large, and the compensated working conduction angle needs to be shifted forward again according to the preset time step until P'-δ < P < P'+δ is satisfied. After shifting the working conduction angle forward, adjust the operating power of the electric cooker according to the corrected working conduction angle to ensure the normal operation of the electric cooker.

[0060] As a concrete example, such as Figure 3 As shown, the control method of the electric cooking appliance of the present invention may include the following steps:

[0061] S201, the electric cooker is powered on and working.

[0062] S202, acquire zero-crossing signal.

[0063] S203 determines the zero-crossing time based on the zero-crossing signal and determines the operating frequency of the power supply based on the zero-crossing time.

[0064] S204, acquire the voltage detection value and determine the detection time of the maximum voltage detection value.

[0065] S205, determine the time interval based on the zero-crossing time and the detection time.

[0066] S206, determine whether the time interval and the working frequency meet the preset relationship. If yes, proceed to step S208; if no, proceed to step S207.

[0067] S207, power supply distortion, compensation for the working conduction angle of the electric cooker.

[0068] S208, the power supply is normal, and it is heating normally using chopper.

[0069] S209, obtain the target power P and actual operating power P' of the electric cooking appliance.

[0070] S210, determine whether P'-δ < P < P'+δ is true. If yes, proceed to step S212; otherwise, proceed to step S211. Where δ represents the preset power threshold.

[0071] S211, continue adjusting the working conduction angle, and return to step S210.

[0072] S212, keep the compensated working conduction angle unchanged.

[0073] S213, adjusts the operating power of the electric cooker according to the working conduction angle.

[0074] In summary, according to the control method of the electric cooker according to embodiments of the present invention, when the electric cooker is operating at low power, if it is determined that the power supply of the electric cooker is distorted, the operating conduction angle of the electric cooker is compensated, the actual operating power of the electric cooker is determined, and the compensated operating conduction angle is corrected according to the actual operating power, so as to adjust the operating power of the electric cooker according to the corrected operating conduction angle. Therefore, this method compensates and corrects the operating conduction angle of the electric cooker when it is determined that the power supply of the electric cooker is distorted, thereby preventing deviations in heating power that could lead to food overflow.

[0075] Corresponding to the above embodiments, the present invention also proposes a cooking mode recognition device for a multifunctional cooking platform.

[0076] like Figure 4 As shown, the control device 100 of the electric cooking appliance in this embodiment of the invention may include: a compensation module 110, a determination module 120, and a control module 130.

[0077] The control module 110 compensates for power distortion in the electric cooker when it is operating at low power. The determination module 120 determines the actual operating power of the electric cooker. The control module 130 corrects the compensated power angle based on the actual operating power, so as to adjust the operating power of the electric cooker according to the corrected power angle.

[0078] According to one embodiment of the present invention, the compensation module 110 is further configured to: perform zero-crossing detection on the power supply to obtain a zero-crossing signal; determine the operating frequency of the power supply based on the zero-crossing signal; perform voltage detection on the power supply when the operating frequency is normal to obtain a voltage detection value; and determine whether the power supply is distorted based on the zero-crossing signal, the operating frequency, and the voltage detection value.

[0079] According to one embodiment of the present invention, the compensation module 110 determines whether the power supply is distorted based on the zero-crossing signal, the operating frequency, and the voltage detection value. Specifically, it is used to: determine the zero-crossing time based on the zero-crossing signal, determine the detection time of the maximum voltage detection value based on the voltage detection value, and determine the time interval between the zero-crossing time and the detection time, wherein the zero-crossing time is before the detection time; when the time interval and the operating frequency satisfy a preset relationship, it is determined that the power supply is normal; when the time interval and the operating frequency do not satisfy the preset relationship, it is determined that the power supply is distorted.

[0080] According to an embodiment of the present invention, when it is determined that the power supply is normal, the control module 130 is further configured to: determine the target power of the electric cooker, determine the chopper power adjustment strategy according to the target power, and adjust the operating power of the electric cooker according to the chopper power adjustment strategy.

[0081] According to one embodiment of the present invention, the compensation module 110 is further configured to: determine a quarter cycle of the power supply according to the operating frequency; when the time interval is greater than a quarter cycle, perform backward compensation on the operating conduction angle according to a preset time step; when the time interval is less than a quarter cycle, perform forward compensation on the operating conduction angle according to a preset time step.

[0082] According to one embodiment of the present invention, the control module 130 is further configured to: determine the target power of the electric cooker; when the target power is greater than the difference between the actual operating power and the preset power threshold, and less than the sum of the actual operating power and the preset power threshold, keep the compensated operating conduction angle unchanged; when the target power is less than or equal to the difference between the actual operating power and the preset power threshold, or when the target power is greater than or equal to the sum of the actual operating power and the preset power threshold, perform further compensation on the compensated operating conduction angle according to a preset time step, until the target power is greater than the difference between the actual operating power and the preset power threshold, and less than the sum of the actual operating power and the preset power threshold.

[0083] According to another embodiment of the present invention, the control module 130 is further configured to: determine the target power of the electric cooker; when the target power is greater than the difference between the actual operating power and the preset power threshold, and less than the sum of the actual operating power and the preset power threshold, keep the compensated operating conduction angle unchanged; when the target power is less than or equal to the difference between the actual operating power and the preset power threshold, or when the target power is greater than or equal to the sum of the actual operating power and the preset power threshold, advance the compensated operating conduction angle again according to a preset time step until the target power is greater than the difference between the actual operating power and the preset power threshold, and less than the sum of the actual operating power and the preset power threshold.

[0084] According to one embodiment of the present invention, the determining module 120 determines the actual operating power of the electric cooker, specifically for: acquiring the operating current and effective operating voltage of the electric cooker; and determining the actual operating power based on the operating current and effective operating voltage.

[0085] It should be noted that for details not disclosed in the control device of the electric cooking appliance in this embodiment of the invention, please refer to the details disclosed in the control method of the electric cooking appliance in this embodiment of the invention, which will not be repeated here.

[0086] According to the control device of the electric cooker of the present invention, when the electric cooker is operating at low power, if it is determined that the power supply of the electric cooker is distorted, the compensation module compensates for the working conduction angle of the electric cooker. The determination module determines the actual operating power of the electric cooker, and the control module corrects the compensated working conduction angle according to the actual operating power, so as to adjust the operating power of the electric cooker according to the corrected working conduction angle. Therefore, the device can compensate and correct the working conduction angle of the electric cooker when it is determined that the power supply of the electric cooker is distorted, thereby preventing deviations in heating power that could cause food to overflow.

[0087] Corresponding to the above embodiments, the present invention also proposes an electric cooking appliance.

[0088] like Figure 5 As shown, the electric cooker 200 of the present invention includes a heating plate provided with a heating element, and may also include: a memory 210, a processor 220, and a control program of the electric cooker stored in the memory 210 and executable on the processor 220. When the processor 220 executes the control program of the electric cooker, it implements the above-mentioned control method of the electric cooker.

[0089] The electric cooker of the present invention, by executing the above-described control method for electric cookers, can prevent deviations in heating power from causing food to overflow during cooking.

[0090] Corresponding to the above embodiments, the present invention also proposes a computer-readable storage medium.

[0091] The present invention provides a computer-readable storage medium having a control program for an electric cooker stored thereon, which, when executed by a processor, implements the above-described control method for the electric cooker.

[0092] The computer-readable storage medium of this invention, by executing the control method of the electric cooker described above, can prevent cooking ingredients from overflowing due to deviations in heating power.

[0093] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0094] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0095] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the 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.

[0096] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0097] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0098] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A control method for an electric cooking appliance, characterized in that, include: When the electric cooker is operating at low power, if it is determined that the power supply of the electric cooker is distorted, the working conduction angle of the electric cooker is compensated, and the actual operating power of the electric cooker is determined. The compensated operating conduction angle is corrected based on the actual operating power so that the operating power of the electric cooker can be adjusted according to the corrected operating conduction angle. Specifically, this includes: comparing the actual operating power of the electric cooker with the set operating power; if the power difference between the two is within the set range, then the cooker operates according to the current operating conduction angle; if the power difference between the two exceeds the set range, then the compensated operating conduction angle is corrected again until the power difference between the two is within the set range.

2. The method according to claim 1, characterized in that, Determining that the power supply to the electric cooking appliance is distorted includes: Zero-crossing detection is performed on the power supply to obtain the zero-crossing signal; The operating frequency of the power supply is determined based on the zero-crossing signal; When the operating frequency is normal, the voltage of the power supply is detected to obtain the voltage detection value; The power supply is determined to be distorted based on the zero-crossing signal, the operating frequency, and the voltage detection value.

3. The method according to claim 2, characterized in that, Determining whether the power supply is distorted based on the zero-crossing signal, the operating frequency, and the voltage detection value includes: The zero-crossing time is determined based on the zero-crossing signal, and the detection time of the maximum voltage detection value is determined based on the voltage detection value. The time interval between the zero-crossing time and the detection time is also determined, wherein the zero-crossing time is before the detection time. When the time interval and the operating frequency satisfy a preset relationship, the power supply is determined to be normal. When the preset relationship between the time interval and the operating frequency is not satisfied, it is determined that the power supply is distorted.

4. The method according to claim 3, characterized in that, When it is determined that the power supply is normal, the method further includes: The target power of the electric cooker is determined, and a chopper power adjustment strategy is determined based on the target power, and the operating power of the electric cooker is adjusted based on the chopper power adjustment strategy.

5. The method according to claim 3, characterized in that, When it is determined that the power supply is distorted, compensation is made for the operating conduction angle of the electric cooker, including: The quarter-cycle of the power supply is determined based on the operating frequency; When the time interval is greater than one-quarter of the cycle, the working conduction angle is shifted backward to compensate according to a preset time step. When the time interval is less than a quarter of a cycle, the working conduction angle is advanced to compensate according to a preset time step.

6. The method according to claim 5, characterized in that, After compensating for the shift of the operating conduction angle according to a preset time step, the compensated operating conduction angle is corrected based on the actual operating power, including: Determine the target power of the electric cooker; When the target power is greater than the difference between the actual operating power and the preset power threshold, but less than the sum of the actual operating power and the preset power threshold, the compensated operating conduction angle remains unchanged. When the target power is less than or equal to the difference between the actual operating power and the preset power threshold, or when the target power is greater than or equal to the sum of the actual operating power and the preset power threshold, the compensated operating conduction angle is shifted back again according to a preset time step until the target power is greater than the difference between the actual operating power and the preset power threshold, and less than the sum of the actual operating power and the preset power threshold.

7. The method according to claim 5, characterized in that, After compensating for the forward shift of the operating conduction angle according to a preset time step, the compensated operating conduction angle is corrected based on the actual operating power, including: Determine the target power of the electric cooker; When the target power is greater than the difference between the actual operating power and the preset power threshold, but less than the sum of the actual operating power and the preset power threshold, the compensated operating conduction angle remains unchanged. When the target power is less than or equal to the difference between the actual operating power and the preset power threshold, or when the target power is greater than or equal to the sum of the actual operating power and the preset power threshold, the compensated operating conduction angle is moved forward again according to a preset time step until the target power is greater than the difference between the actual operating power and the preset power threshold, and less than the sum of the actual operating power and the preset power threshold.

8. The method according to any one of claims 1-7, characterized in that, Determining the actual operating power of the electric cooker includes: Obtain the operating current and effective operating voltage of the electric cooker; The actual operating power is determined based on the operating current and effective operating voltage.

9. A control device for an electric cooking appliance, characterized in that, include: The compensation module is used to compensate the operating conduction angle of the electric cooker if it is determined that the power supply of the electric cooker is distorted when the electric cooker is operating at low power. The determining module is used to determine the actual operating power of the electric cooker; The control module corrects the compensated operating conduction angle based on the actual operating power, so as to adjust the operating power of the electric cooker according to the corrected operating conduction angle. Specifically, it compares the actual operating power of the electric cooker with the set operating power. If the power difference between the two is within the set range, the cooker operates according to the current operating conduction angle. If the power difference between the two exceeds the set range, the compensated operating conduction angle is corrected again until the power difference between the two is within the set range.

10. An electric cooking appliance, comprising a heating plate equipped with a heating element, characterized in that, The device includes a memory, a processor, and a control program for an electric cooker stored in the memory and executable on the processor. When the processor executes the control program for the electric cooker, it implements the control method for the electric cooker according to any one of claims 1-8.

11. A computer-readable storage medium, characterized in that, It stores a control program for an electric cooker, which, when executed by a processor, implements the control method for an electric cooker according to any one of claims 1-8.

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