Output power control method and system suitable for electric iron

Abstract

The invention discloses an output power control method and system suitable for an electric iron, and the method comprises the steps: calculating a temperature difference value between adjacent preset temperature detection points, and obtaining a local temperature gradient; determining an initial contact area, a continuous contact area and a separation contact area; calculating a first power compensation coefficient, a second power compensation coefficient and a third power compensation coefficient; calculating initial target output power, continuous target power and separation target power; calculating an initial trigger delay angle, a continuous trigger delay angle and a separation trigger delay angle of the silicon controlled rectifier in the corresponding area according to the voltage value; generating an initial pulse signal, a continuous pulse signal and a separation pulse signal; and the silicon controlled rectifiers respectively send the initial pulse signal, the continuous pulse signal and the separation pulse signal to the initial contact area, the continuous contact area and the separation contact area. The stability of the output power of the electric iron is improved.

Description

Technical Field

[0001] This application belongs to the field of output power control of electric irons, and particularly relates to an output power control method and system suitable for electric irons. Background Art

[0002] As a commonly used household appliance, the control of the output power of an electric iron has an important impact on the ironing effect of clothes and the use safety. Traditional electric irons usually use mechanical thermostats for temperature control, which have problems such as slow response speed, low temperature control accuracy, and easy occurrence of high temperatures, easily causing burns or damage to clothes, and it is difficult to achieve intelligent power adjustment according to the characteristics of different clothing materials during use.

[0003] In related technologies, an intelligent power control method for electric irons can be realized by establishing a clothing material recognition model, combining an infrared array sensor to collect the temperature distribution data of the bottom plate in real time, and using a neural network algorithm to adaptively adjust the heating power, which not only improves the temperature control accuracy but also realizes intelligent power control for different clothes.

[0004] However, in the actual use process, due to the discontinuity of the ironing action, the contact state between the bottom plate and the clothes changes frequently, resulting in the data collected by the temperature sensor being difficult to truly reflect the actual temperature distribution of the ironing area, thus reducing the accuracy and timeliness of the electric iron power control. Summary of the Invention

[0005] This application provides an output power control method and system suitable for electric irons, which is used to solve the problem of reduced accuracy and timeliness of power control caused by the uncertainty of the contact between the bottom plate of the electric iron and the clothes, and improve the stability of the output power of the electric iron.

[0006] In a first aspect, this application provides an output power control method suitable for an electric iron, which calculates the temperature difference between adjacent preset temperature detection points according to the temperature data collected in the bottom plate of the electric iron to obtain a local temperature gradient; When the change rate of the local temperature gradient is greater than a first preset threshold, the corresponding area is determined as an initial contact area; calculate the change rate of the temperature gradient of the initial contact area, and determine a first power compensation coefficient according to a preset compensation curve and the change rate of the temperature gradient; When the change rate of the local temperature gradient is less than the first preset threshold and greater than a second preset threshold, the corresponding area is determined as a continuous contact area; calculate a second power compensation coefficient based on the temperature uniformity coefficient of the continuous contact area; When the change rate of the local temperature gradient is less than the second preset threshold, the corresponding area is determined as a disengagement contact area; determine a third power compensation coefficient according to the temperature drop rate of the disengagement contact area; Calculate the initial trigger delay angle, continuous trigger delay angle, and disengagement trigger delay angle of the thyristor in the corresponding area according to the voltage value at the input end of the electric iron, the first power compensation coefficient, the second power compensation coefficient, and the third power compensation coefficient; Generate an initial pulse signal, a continuous pulse signal, and a disengagement pulse signal corresponding one-to-one to the initial contact area, the continuous contact area, and the disengagement contact area according to the initial trigger delay angle, the continuous trigger delay angle, and the disengagement trigger delay angle, so that the thyristors in the initial contact area, the continuous contact area, and the disengagement contact area control the output powers of the initial contact area, the continuous contact area, and the disengagement contact area to be the initial target output power, the continuous target power, and the disengagement target power respectively.

[0007] By adopting the above technical solution, multiple temperature acquisition points are set on the bottom plate of the electric iron to obtain temperature data and calculate the local temperature gradient, realizing the identification of the thermal states of different areas of the bottom plate. The bottom plate area is divided into an initial contact area, a continuous contact area, and a disengagement contact area according to the change rate of the local temperature gradient, and the corresponding power compensation coefficients are calculated for different areas respectively, so that the system can adaptively adjust the output power of each area. By multiplying the compensation coefficient by the original power to obtain the target power, and then combining with the real-time voltage value to calculate the trigger delay angle, and finally generating the corresponding pulse signal to control the thyristor, the accuracy of controlling the output power of each area is improved, the electric iron maintains an appropriate heating power under different contact states, solves the problems of local overheating or insufficient temperature that may be caused by unified power control, improves the stability of the output power of the electric iron, and reduces the risk of damage to the fabric.

[0008] Combined with some embodiments of the first aspect, in some embodiments, calculate the change rate of the temperature gradient in the initial contact area, and determine the first power compensation coefficient according to the preset compensation curve and the change rate of the temperature gradient, specifically including: Calculate the temperature gradient at every two adjacent sampling moments according to the local temperature gradient in the initial contact area; Perform a difference operation on the temperature gradient to obtain the change rate of the temperature gradient; Select a matching curve segment from the preset compensation curve based on the numerical range of the change rate of the temperature gradient; Substitute the change rate of the temperature gradient into the function formula of the curve segment to calculate and obtain the first power compensation coefficient.

[0009] By adopting the above technical solution, the temperature gradient of the initial contact area is differentiated to obtain the temperature gradient change rate, and a matching preset compensation curve segment is selected based on the numerical range of the change rate. By substituting the temperature gradient change rate into the curve segment function formula, the first power compensation coefficient is calculated, enabling the system to more accurately reflect the heat exchange state between the bottom plate and the fabric at the initial contact, and adjusting the output power accordingly. By using the preset compensation curve, the system can select the most suitable compensation strategy according to different degrees of temperature changes, making the temperature adjustment in the initial contact stage more stable and controllable, and improving the temperature control accuracy of the electric iron when starting to iron.

[0010] Combined with some embodiments of the first aspect, in some embodiments, the initial trigger delay angle, continuous trigger delay angle, and disengagement trigger delay angle of the thyristor in the corresponding area are calculated according to the voltage value at the input end of the electric iron, the first power compensation coefficient, the second power compensation coefficient, and the third power compensation coefficient. Specifically, it includes: Compare the voltage value at the input end of the electric iron with the preset standard voltage value to obtain the voltage correction coefficient; Multiply the first power compensation coefficient, the second power compensation coefficient, and the third power compensation coefficient by the original power respectively to obtain the initial target output power, continuous target power, and disengagement target power corresponding to the initial contact area, continuous contact area, and disengagement contact area one by one; Multiply the voltage correction coefficient by the initial target output power, continuous target power, and disengagement target power respectively to obtain the corrected initial target output power, continuous target power, and disengagement target power; According to the corrected initial target output power, continuous target power, and disengagement target power, calculate the corresponding conduction angle in combination with the volt-ampere characteristic curve of the thyristor in the corresponding area; Convert the conduction angle into a trigger delay angle based on the zero-crossing point of the AC power supply to obtain the initial trigger delay angle, continuous trigger delay angle, and disengagement trigger delay angle.

[0011] By adopting the above technical solution, the real-time voltage value is compared with the standard voltage value to obtain the voltage correction coefficient, which is multiplied by the target output power for correction, and then the conduction angle is calculated in combination with the volt-ampere characteristic curve of the thyristor, and finally converted into the trigger delay angle, enabling the system to timely adjust the trigger timing of the thyristor when the grid voltage fluctuates, maintaining the stability of the actual output power. The combination of the voltage correction mechanism and the thyristor characteristics improves the accuracy of achieving the target power output under different voltage conditions, improves the adaptability of the system in the actual application environment, reduces the interference of grid fluctuations on temperature control, and improves the stability of the heating performance of the electric iron.

[0012] In some embodiments in combination with some embodiments of the first aspect, after respectively sending an initial pulse signal, a continuous pulse signal, and a disengagement pulse signal to thyristors in an initial contact area, a continuous contact area, and a disengagement contact area, the method further includes: Collecting the actual conduction time during the operation of each thyristor; Dividing the thyristors in each area into a high-load area and a low-load area according to the actual conduction time of each thyristor, where the area with an actual conduction time exceeding a preset duration is the high-load area, and the area with an actual conduction time lower than the preset duration is the low-load area; Allocating the pulse signals in the high-load area to adjacent low-load areas according to a preset time ratio, where the preset time ratio is determined according to the remaining conduction time of the low-load area; During the process of allocating pulse signals, the thyristors in the high-load area and the low-load area are alternately triggered at preset time intervals.

[0013] By adopting the above technical solution, the actual conduction time of the thyristors is collected, each area is divided into a high-load area and a low-load area, part of the pulse signals in the high-load area are allocated to adjacent low-load areas according to a preset time ratio, and the thyristors in each area are controlled by an alternating trigger method, dynamically balancing the power loads of each area. The alternating trigger strategy reduces the current impact caused by simultaneous conduction by staggering the conduction moments of each area in time, reduces the stress on circuit components, improves the reliability of the system, and at the same time achieves a more uniform heat distribution.

[0014] In some embodiments in combination with some embodiments of the first aspect, allocating the pulse signals in the high-load area to adjacent low-load areas according to a preset time ratio specifically includes: Calculating the difference between the actual conduction time of the low-load area and the preset duration to obtain the available load duration; Calculating the remaining power capacity of the low-load area according to the available load duration; Allocating the pulse signals in the high-load area to adjacent low-load areas according to the ratio of the remaining power capacity.

[0015] By adopting the above technical solution, the difference between the actual conduction time and the preset duration in the low-load area is calculated to obtain the available duration, and the remaining power capacity of the low-load area is calculated based on the available duration. Then, the pulse signals in the high-load area are distributed to the adjacent low-load areas according to the ratio of the remaining power capacity, so that the system can more accurately evaluate the actual power-carrying capacity of each low-load area, and the remaining power capacity of the low-load area can be fully utilized. Since the distribution is carried out according to the ratio of the remaining power capacity, the additional power load obtained by each low-load area matches its actual carrying capacity. This dynamic and balanced power distribution method can improve the power utilization efficiency of the electric iron, reduce local overheating, extend the service life of the thyristor, and improve the overall working stability of the electric iron.

[0016] Combined with some embodiments of the first aspect, in some embodiments, during the process of pulse signal distribution, after alternately triggering the thyristors in the high-load area and the low-load area at preset time intervals, the method further includes: Detect the change in the conduction resistance of the thyristors in the high-load area and the low-load area during the alternating conduction process; When it is determined that the working state of any thyristor is abnormal based on the change in the conduction resistance, calculate the power adjustment coefficient of the thyristor based on the change in the conduction resistance; Adjust the trigger delay angle of the thyristor according to the power adjustment coefficient to keep the thyristor in an interleaved conduction state with the thyristors in the adjacent areas.

[0017] By adopting the above technical solution, the change in the conduction resistance of the thyristors in the high-load area and the low-load area during the alternating conduction process is detected. When an abnormality is found, the power adjustment coefficient is calculated based on the change in the conduction resistance. Then, by adjusting the trigger delay angle of the thyristor, the thyristor is kept in an interleaved conduction state with the thyristors in the adjacent areas, forming a closed-loop monitoring and adjustment mechanism for the working state of the thyristor. It can timely detect the abnormal working state of the thyristor and ensure that the thyristors in each area always maintain an interleaved conduction rhythm through precise power adjustment. Since the adjustment of the trigger delay angle is carried out based on the power adjustment coefficient calculated from the actual change in the conduction resistance, the adjustment amplitude and direction are accurate, which can reduce the mutual interference between adjacent thyristors, improve the power conversion efficiency of the system, and enhance the uniformity of the temperature distribution on the electric iron soleplate.

[0018] Combined with some embodiments of the first aspect, in some embodiments, when it is determined that the working state of any thyristor is abnormal based on the change in the conduction resistance, calculating the power adjustment coefficient of the thyristor based on the change in the conduction resistance specifically includes: Obtain the conduction resistance values of the thyristor in multiple consecutive conduction cycles and calculate the change rate of the conduction resistance values; When the change rate exceeds the third preset threshold, it is determined that the thyristor is in an abnormal working state; Take the ratio of the change rate to the third preset threshold as the power adjustment coefficient of the thyristor.

[0019] By adopting the above technical solution, the on-resistance values of the thyristor in multiple consecutive conduction cycles are obtained and its change rate is calculated. Taking the ratio of the change rate to the third preset threshold as the power adjustment coefficient and using the data of multiple consecutive conduction cycles as the calculation basis improves the accuracy and reliability of power adjustment. The calculation method of taking the ratio of the change rate to the preset threshold as the power adjustment coefficient makes the amplitude of power adjustment positively correlated with the degree of abnormal working state of the thyristor, thereby realizing more accurate power adjustment, reducing the energy loss in the power adjustment process, reducing the heat generation of the thyristor due to frequent adjustment, and improving the overall energy utilization efficiency of the electric iron.

[0020] In a second aspect, an output power control system applicable to an electric iron provided by an embodiment of the present application includes: one or more processors and a memory; the memory is coupled to the one or more processors, and the memory is used to store computer program code. The computer program code includes computer instructions, and the one or more processors call the computer instructions to enable the system to execute the method described in the first aspect and any possible implementation manner in the first aspect.

[0021] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, including instructions, when the above instructions run on the system, enabling the above system to execute the method described in the first aspect and any possible implementation manner in the first aspect.

[0022] In a fourth aspect, an embodiment of the present application provides a computer program product, when the computer program product runs on the system, enabling the system to execute the method described in any possible implementation manner in the first aspect.

[0023] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. The present application provides a method for controlling the output power of an electric iron. By setting multiple temperature acquisition points on the bottom plate of the electric iron to obtain temperature data and calculating the local temperature gradient, the thermal state of different regions of the bottom plate can be identified. The bottom plate area is divided into an initial contact area, a continuous contact area, and a disengagement contact area according to the change rate of the local temperature gradient, and the corresponding power compensation coefficients are calculated for different regions respectively, enabling the system to adaptively adjust the output power of each region. By multiplying the compensation coefficient by the original power to obtain the target power, and then calculating the trigger delay angle in combination with the real-time voltage value, a corresponding pulse signal is finally generated to control the thyristor, improving the accuracy of controlling the output power of each region, keeping the electric iron at an appropriate heating power under different contact states, solving the problems of local overheating or insufficient temperature that may be caused by unified power control, improving the stability of the output power of the electric iron, and reducing the risk of damage to the fabric.

[0024] 2. The present application provides a method for controlling the output power of an electric iron. The actual conduction time of the thyristor is collected, each region is divided into a high-load region and a low-load region, and part of the pulse signals in the high-load region are allocated to the adjacent low-load region according to a preset time ratio. At the same time, the thyristors in each region are controlled by an alternating trigger method, dynamically balancing the power loads of each region. The alternating trigger strategy staggers the conduction moments of each region in time, reducing the current impact caused by simultaneous conduction, reducing the stress on circuit components, improving the reliability of the system, and at the same time achieving a more uniform heat distribution.

[0025] 3. The present application provides a method for controlling the output power of an electric iron. The change in the conduction resistance of the thyristors in the high-load region and the low-load region during the alternating conduction process is detected. When an abnormality is found, the power adjustment coefficient is calculated based on the change in the conduction resistance, and then the trigger delay angle of the thyristor is adjusted to maintain the staggered conduction state of the thyristor with the thyristors in the adjacent regions, forming a closed-loop monitoring and adjustment mechanism for the working state of the thyristor. It can timely detect the abnormal working state of the thyristor and ensure that the thyristors in each region always maintain the working rhythm of staggered conduction through precise power adjustment. Since the adjustment of the trigger delay angle is based on the power adjustment coefficient calculated from the actual change in the conduction resistance, the adjustment amplitude and direction are both accurate, which can reduce the mutual interference between adjacent thyristors, improve the power conversion efficiency of the system, and enhance the uniformity of the temperature distribution on the bottom plate of the electric iron. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a flowchart of a method for controlling the output power of an electric iron according to an embodiment of the present application.

[0027] Figure 2It is another flowchart of a method for controlling the output power of an electric iron according to an embodiment of the present application.

[0028] Figure 3 It is a schematic structural diagram of an entity device of a system for controlling the output power of an electric iron according to an embodiment of the present application. Detailed implementation manners

[0029] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of the present application, the singular forms "a", "an", "the", "above-mentioned", "the foregoing", "this" are also intended to include the plural forms, unless clearly indicated otherwise in the context. It should also be understood that the term "and / or" used in the present application refers to any or all possible combinations including one or more of the listed items.

[0030] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as implying or suggesting relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] Next, an embodiment is used in combination with Figure 1 to describe a method for controlling the output power of an electric iron according to an embodiment of the present application: Please refer to Figure 1 which is a flowchart of a method for controlling the output power of an electric iron according to an embodiment of the present application.

[0032] S101. Calculate the temperature difference between adjacent preset temperature detection points based on the temperature data collected in the bottom plate of the electric iron to obtain a local temperature gradient; In this step, the system collects temperature data at a number of preset temperature collection points on the bottom plate of the electric iron. The number and distribution of the preset temperature collection points can be determined according to factors such as the size, shape, and temperature distribution characteristics of the bottom plate of the electric iron to ensure that the temperature distribution of the bottom plate can be comprehensively and accurately reflected. The preset detection period refers to the time interval for each collection of temperature data, which can be set according to the usage requirements and temperature change characteristics of the electric iron and is not limited here. The calculation of the temperature gradient can adopt the two-point method, that is, select two adjacent temperature collection points, divide their temperature difference by the distance between the two points to obtain the temperature gradient in this direction. For the temperature gradients in different directions, they can be calculated separately or synthesized to obtain a comprehensive temperature gradient vector.

[0033] When the system calculates the temperature gradient, it needs to determine the connection direction and distance between adjacent points according to the distribution positions of the preset temperature acquisition points. For a regularly distributed acquisition point array, a fixed formula can be directly used for calculation; for irregularly distributed acquisition points, mathematical methods such as coordinate transformation are required to map them onto a regular grid or coordinate system before calculation. At the same time, in order to improve the calculation accuracy and efficiency, the system can partition and group the temperature acquisition points according to the shape characteristics of the electric iron soleplate, and adopt different calculation methods and parameters.

[0034] The system can collect temperature data by installing temperature sensors at the preset temperature acquisition points. The temperature sensors can select common temperature measurement components such as thermocouples and thermal resistors, and through a reasonable installation method, firmly fix them at the preset positions on the surface or inside of the soleplate. At the same time, the system also needs to be equipped with a signal conditioning circuit and a data acquisition module that match the temperature sensors to realize processing such as amplification, filtering, and A / D conversion of the temperature signal, and transmit the digitized temperature data to the controller for subsequent analysis and calculation.

[0035] In practical applications, the temperature sensors may be interfered by the external environment, such as electromagnetic interference and mechanical vibration, resulting in deviation or distortion of the collected temperature data. In order to improve the reliability and accuracy of temperature acquisition, the system can set anti-interference measures such as shielding and isolation in the signal conditioning circuit, and perform filtering, calibration, etc. on the collected temperature data through software algorithms to eliminate or reduce the influence of various interference factors.

[0036] It should be noted that steps S102 - S104 are parallel steps, and there is no time or logical sequence among these three steps. They can be executed sequentially or simultaneously, and no limitation is made here.

[0037] S102. When the change rate of the local temperature gradient is greater than the first preset threshold, determine the corresponding area as the initial contact area; calculate the change rate of the temperature gradient in the initial contact area, and determine the first power compensation coefficient according to the preset compensation curve and the change rate of the temperature gradient; When the change rate of the local temperature gradient is greater than the first preset threshold, the system determines the corresponding area as the initial contact area. Then the system calculates the change rate of the temperature gradient in the initial contact area, and determines the first power compensation coefficient according to the preset compensation curve and the change rate of the temperature gradient. Specifically: the system calculates the temperature gradient between every two adjacent sampling moments according to the local temperature gradient in the initial contact area; performs a difference operation on the temperature gradient to obtain the change rate of the temperature gradient; selects a matching curve segment from the preset compensation curve based on the numerical range of the change rate of the temperature gradient; substitutes the change rate of the temperature gradient into the function formula of the curve segment to calculate and obtain the first power compensation coefficient.

[0038] In this step, the system first determines whether each area on the iron soleplate belongs to the initial contact area according to the change rate of the local temperature gradient. When the change rate of the temperature gradient in a certain area exceeds the preset first threshold, it indicates that the area has made initial contact with the clothing, and heat begins to transfer from the soleplate to the clothing, resulting in a large change in the temperature distribution in this area. The magnitude of the first preset threshold can be determined according to parameters such as the rated power of the iron and the soleplate material, which should be sensitive enough to detect the initial contact and avoid misjudging normal temperature fluctuations as contact.

[0039] For the part determined to be the initial contact area, the system needs to further calculate its temperature gradient change rate as the basis for determining the power compensation coefficient. The temperature gradient change rate can be obtained by calculating the difference of the temperature gradients in several consecutive sampling periods, which reflects the severity of the temperature distribution change in the initial contact stage. According to the magnitude of the temperature gradient change rate, the system can select the corresponding power compensation coefficient from the preset compensation curve to adjust the heating power of this area to adapt to the influence of factors such as clothing material and thickness, ensuring the consistency of the ironing effect.

[0040] In actual use, when different types and states of clothing come into contact with the iron soleplate, their heat absorption characteristics may vary greatly, resulting in different temperature change laws in the initial contact area. To further improve the pertinence and effectiveness of power compensation, the system can establish a clothing characteristic database, which includes the physical parameters of different types of clothing, the temperature change curve under standard conditions, the mapping relationship between clothing materials and compensation curves, and the heat conduction characteristic parameters under different humidity conditions; collect the sensing data of the sensor array on the iron soleplate, and the sensing data includes temperature data, humidity data and pressure data; calculate the material characteristic value according to the sensing data, and match the material characteristic value with the standard characteristic value in the clothing characteristic database to obtain the type and state of the current clothing; retrieve the benchmark curve with the highest matching degree from the preset compensation curve library based on the type and state of the clothing; calculate the deviation coefficient between the current working state and the standard state, and correct the benchmark curve according to the deviation coefficient to obtain the corrected compensation curve; calculate the power compensation coefficient according to the corrected compensation curve; adjust the output power of the iron based on the power compensation coefficient.

[0041] S103. When the change rate of the local temperature gradient is less than the first preset threshold and greater than the second preset threshold, the corresponding area is determined as the continuous contact area; calculate the second power compensation coefficient based on the temperature uniformity coefficient of the continuous contact area; In this step, the system further judges and classifies the change rate of the local temperature gradient. When the change rate drops below the first preset threshold but remains higher than the second preset threshold, it indicates that the soleplate of the electric iron and the clothing have entered a stable continuous contact state, the heat conduction process tends to be balanced, and the change in temperature distribution gradually slows down. The second preset threshold can be set according to factors such as the rated power of the electric iron and the clothing material. It should maintain an appropriate interval with the first threshold to accurately distinguish different contact stages, and at the same time avoid being too sensitive and causing frequent power adjustments.

[0042] For the part determined to be the continuous contact area, the system needs to calculate the uniformity coefficient of its temperature distribution as the basis for adjusting power compensation. The temperature uniformity coefficient can be measured by the standard deviation or variance of the temperatures at each sampling point in this area, which reflects the degree of heat diffusion and homogenization on the soleplate. The smaller the uniformity coefficient, the more consistent the temperature distribution in this area, and the corresponding power compensation coefficient should also be reduced accordingly to maintain temperature stability. The system can quickly calculate the value of the second power compensation coefficient according to the pre-set correspondence between the uniformity coefficient and the compensation coefficient.

[0043] During the actual ironing process, the temperature distribution in the continuous contact area may be affected by local features such as clothing wrinkles and stitches, showing uneven or abnormal change trends. In response to this situation, the system can collect the temperature data of the soleplate of the electric iron; divide the soleplate into several sub-areas and calculate the temperature uniformity coefficient of each sub-area; identify the characteristic areas on the soleplate according to the temperature uniformity coefficient, and the characteristic areas include wrinkle areas and stitch areas; classify the characteristics of each sub-area, and divide the sub-areas with the same or similar characteristics into the same characteristic category; calculate the compensation coefficient of each characteristic category, and determine the sub-area weight according to the temperature distribution characteristics of the sub-area in the corresponding characteristic category; calculate the overall control parameter based on the compensation coefficient and the sub-area weight; adjust the output power of the electric iron according to the overall control parameter.

[0044] S104. When the change rate of the local temperature gradient is less than the second preset threshold, the corresponding area is determined as the disengagement contact area; determine the third power compensation coefficient according to the temperature drop rate of the disengagement contact area; In this step, the system identifies the area where the soleplate of the electric iron is disengaged from the clothing by judging the change rate of the local temperature gradient. When the change rate is lower than the second preset threshold, it indicates that this area has completely disengaged from the clothing, and there is no longer heat transfer occurring, and the temperature begins to show an obvious downward trend.

[0045] For the part determined to be the disengagement area, the system needs to calculate its temperature drop rate, which serves as the basis for determining the third power compensation coefficient. The temperature drop rate can be obtained by performing differential calculations on the temperature data within several consecutive sampling periods, reflecting the speed of temperature decay after disengagement. The greater the temperature drop rate, the faster the heat dissipation in this area, and the corresponding power compensation coefficient should be increased accordingly to quickly restore the bottom plate temperature to the initial state and prepare for the next contact. The system can select appropriate compensation coefficient values from the preset rate - coefficient curve according to parameters such as the area and position of the disengagement area.

[0046] In practical applications, the heat dissipation characteristics of the electric iron bottom plate may be affected by external conditions such as ambient temperature and humidity, resulting in fluctuations or anomalies in the temperature drop rate of the disengagement area. In response to this situation, the system can collect the temperature data of the electric iron bottom plate and environmental parameters, where the environmental parameters include ambient temperature and ambient humidity; identify the disengagement area on the bottom plate and calculate the temperature drop rate of the disengagement area; establish a standard curve of the temperature drop rate based on the environmental parameters; calculate the deviation between the actual temperature drop rate and the standard curve to obtain the environmental impact coefficient; correct the rate - coefficient curve based on the environmental impact coefficient to obtain the compensation coefficient; adjust the heating power of the disengagement area according to the compensation coefficient; monitor the temperature change of the disengagement area, and when the temperature is lower than the preset safety threshold, turn off the heating circuit of this area.

[0047] S105. Calculate the initial trigger delay angle, continuous trigger delay angle, and disengagement trigger delay angle of the thyristor in the corresponding area according to the voltage value at the input end of the electric iron, the first power compensation coefficient, the second power compensation coefficient, and the third power compensation coefficient; The system calculates the initial trigger delay angle, continuous trigger delay angle, and disengagement trigger delay angle of the thyristor in the corresponding area according to the voltage value at the input end of the electric iron, the first power compensation coefficient, the second power compensation coefficient, and the third power compensation coefficient. First, the system collects the voltage value at the input end of the electric iron in real - time; then, based on the three power compensation coefficients calculated previously, the system adjusts the power of different areas of the electric iron bottom plate to obtain the target output power suitable for each contact stage. The system first obtains the original power value of the electric iron as the reference power, and then multiplies the three compensation coefficients by the reference power respectively to calculate the target power values corresponding to the initial contact area, continuous contact area, and disengagement area, which serve as the basis for subsequent power control.

[0048] When calculating the target power, the system needs to fully consider the limitations of technical parameters such as the rated power of the electric iron and the supply voltage to ensure that the calculated power value is within a safe and reliable range. At the same time, since the power compensation coefficient itself is a value less than 1, multiplying it by the reference power can moderately adjust the heating effect in different regions on the basis of maintaining the original power level, neither causing the situation of excessive power damaging the clothes or the electric iron nor affecting the ironing effect due to too small power.

[0049] Then, compare the voltage value at the input end of the electric iron with the preset standard voltage value to obtain the voltage correction coefficient; multiply the first power compensation coefficient, the second power compensation coefficient, and the third power compensation coefficient by the original power respectively to obtain the initial target output power, the continuous target power, and the disengagement target power corresponding to the initial contact area, the continuous contact area, and the disengagement contact area one by one; multiply the voltage correction coefficient by the initial target output power, the continuous target power, and the disengagement target power respectively to obtain the corrected initial target output power, the continuous target power, and the disengagement target power; calculate the corresponding conduction angles according to the corrected initial target output power, the continuous target power, and the disengagement target power in combination with the volt-ampere characteristic curve of the thyristor in the corresponding area; convert the conduction angles into trigger delay angles based on the zero-crossing point of the AC power supply to obtain the initial trigger delay angle, the continuous trigger delay angle, and the disengagement trigger delay angle.

[0050] The system monitors and collects the voltage value at the input end of the electric iron in real time as the basis for calculating the trigger delay angle. The magnitude of the input voltage directly affects the conduction characteristics of the thyristor and the power adjustment range. Therefore, it is necessary to select a suitable voltage sensor and equip it with a corresponding signal conditioning circuit to ensure the accuracy and real-time nature of the collected voltage data.

[0051] The system compares the collected voltage value with the standard voltage value and calculates the voltage deviation coefficient. This coefficient reflects the degree of difference between the actual input voltage and the rated voltage and can be used to correct the target output power so that it can adapt to the influence of voltage fluctuations. The system multiplies the voltage deviation coefficient by the initial target output power, the continuous target power, and the disengagement target power respectively to obtain the corrected target power values for each area.

[0052] The system calculates the conduction angles of the thyristors corresponding to each area according to the corrected target power values in combination with the volt-ampere characteristic curve of the thyristor. The magnitude of the conduction angle determines the conduction time length of the thyristor, thereby affecting the power-on time and power output of the heating circuit. The system can use the look-up table method or the mathematical fitting method to quickly find the corresponding conduction angle value from the pre-stored characteristic curve according to the target power value.

[0053] The system converts the calculated conduction angle into a trigger delay angle based on the zero-crossing point of the AC power supply. There is a definite mathematical relationship between the delay angle and the conduction angle, which can be converted through corresponding formulas or algorithms. The value of the trigger delay angle represents the delay time of the starting moment of the thyristor conduction relative to the zero position of the AC power supply. The system assigns the converted delay angle value to the initial contact area, the continuous contact area, and the disengagement contact area as the timing parameters for controlling the thyristor.

[0054] It should be noted that the action of real-time collecting the voltage value at the input end of the electric iron in this step can be carried out before step S105, that is, this action is an action with an independent timing sequence, and its execution timing only needs to meet the requirement of collecting before the voltage value is needed, and it is not limited here.

[0055] S106. Generate an initial pulse signal, a continuous pulse signal, and a disengagement pulse signal corresponding to the initial contact area, the continuous contact area, and the disengagement contact area respectively according to the initial trigger delay angle, the continuous trigger delay angle, and the disengagement trigger delay angle, so that the thyristors in the initial contact area, the continuous contact area, and the disengagement contact area control the output powers in the initial contact area, the continuous contact area, and the disengagement contact area to be the initial target output power, the continuous target power, and the disengagement target power respectively.

[0056] In this step, the system generates corresponding control pulse signals according to the trigger delay angles of each area calculated previously as the timing instructions for driving the thyristor to conduct. The system needs to determine the starting moment and the duration of each pulse signal according to the initial trigger delay angle, the continuous trigger delay angle, and the disengagement trigger delay angle. The starting moment of the pulse signal corresponds to the time point represented by the delay angle, and the duration is related to the conduction time of the thyristor. The system can use a hardware timer or a software timing algorithm to accurately control the timing parameters of the pulse signal.

[0057] The system generates control signals corresponding to the initial contact area, the continuous contact area, and the disengagement contact area according to the timing parameters of the pulse signal. The control signal usually adopts the form of a rectangular wave, with a high level representing conduction and a low level representing cut-off. The system can use the output interface of a microcontroller or a programmable logic device to generate the required rectangular wave signal and output it to the control terminals of the thyristors in each area respectively.

[0058] In the process of generating the control signal, the system needs to strictly follow the timing requirements of the thyristor conduction to ensure that in each AC half-cycle, a trigger pulse is sent to the thyristor only at the specified moment, avoiding multiple triggers or missed triggers. At the same time, in order to improve the control accuracy and stability, the system can adopt a dedicated thyristor drive chip or module with built-in functions such as zero-crossing detection and delay triggering to simplify the design and implementation of the control circuit.

[0059] Then the system applies the previously generated control pulse signals to the control terminals of the thyristors in each area respectively, to achieve precise adjustment and dynamic control of the heating power of the electric iron. The system needs to determine the positions and connection relationships of the thyristors in each area according to the physical structure and wiring method of the electric iron soleplate. Usually, each area is provided with an independent thyristor and heating circuit, and the temperature of this area is adjusted by controlling the conduction time and current magnitude of the thyristor. The system can use methods such as printed circuit boards or terminal blocks to reliably transmit the control pulse signals to the control terminals of each thyristor.

[0060] After the system applies a control signal to the thyristor, the thyristor starts to conduct according to the specified timing and duty cycle, allowing current to flow through the heating resistor, converting electrical energy into heat energy, and heating the corresponding area of the electric iron soleplate. The length and frequency of the thyristor conduction determine the heating power of this area, corresponding to the target output power calculated by the system.

[0061] In the above embodiment, through a series of technical means such as temperature acquisition, contact state judgment, staged power compensation, and thyristor power adjustment, precise control and dynamic optimization of the heating power of the electric iron are achieved, enabling the electric iron to maintain an appropriate heating power under different contact states, solving the problems of local overheating or insufficient temperature that may be caused by unified power control, improving the stability of the output power of the electric iron, and reducing the risk of damage to the fabric.

[0062] Through the control method of the above embodiment, precise control of the output power of different areas of the electric iron soleplate can be achieved. However, in the actual application process, due to the non-uniformity of the clothing material and thickness and the change of ironing pressure, the thyristors in some areas may be in a high-load working state for a long time, while the utilization rate of the thyristors in other areas is relatively low. In order to further optimize the power distribution efficiency of the electric iron and extend the service life of the thyristors, the following is combined with Figure 2 , to describe another output power control method applicable to the electric iron in the embodiment of the present application: Please refer to Figure 2 , which is another process schematic diagram of an output power control method applicable to the electric iron in the embodiment of the present application.

[0063] S201. Collect the actual conduction time during the operation of each thyristor; In this step, the system collects and records the conduction time of thyristors in each area of the electric iron soleplate during actual operation. The conduction time of the thyristor reflects the heating power and load level of that area, and is an important basis for evaluating the power distribution efficiency and the working state of the thyristor. The system can set a dedicated timer or counter in the control circuit of the thyristor to monitor the conduction state of the thyristor in real time, and after each conduction cycle ends, save the accumulated conduction time data to the memory for subsequent analysis and processing.

[0064] During the process of collecting the conduction time, the system needs to consider the timing characteristics of the thyristor operation and the influence of the circuit environment. Since the conduction of the thyristor is determined by the trigger pulse signal at the control terminal, when the system records the conduction time, it needs to be strictly synchronized with the timing of the pulse signal to avoid missing or mis-counting. At the same time, since the thyristor will generate certain electromagnetic interference during operation, which may affect the accuracy and stability of the timing circuit, the system also needs to take necessary anti-interference measures, such as shielding and filtering, to ensure the reliability of the conduction time data.

[0065] S202. Divide the thyristors in each area into high-load areas and low-load areas according to the actual conduction time of each thyristor; The system divides the thyristors in each area into high-load areas and low-load areas according to the actual conduction time of each thyristor. The area where the actual conduction time exceeds the preset duration is the high-load area, and the area where the actual conduction time is lower than the preset duration is the low-load area.

[0066] In this step, the system divides and evaluates the load levels of each area of the electric iron soleplate according to the actual conduction time data of the thyristors collected in the previous step. By setting a reasonable time threshold, the system can identify the area where the conduction time exceeds the threshold as the high-load area, and the area where the conduction time is lower than the threshold as the low-load area. This division of the load level reflects the differences in power consumption and heating intensity of each area during actual operation, and provides a decision-making basis for subsequent power optimization and balanced control.

[0067] When determining the load level threshold, the system can comprehensively consider factors such as the rated power of the electric iron, the conduction characteristics of the thyristor, the clothing material and thickness. Usually, the threshold can be set as a certain proportion of the maximum conduction time of the thyristor, such as 80% or 90%. When the actual conduction time of a certain area continuously exceeds this proportion, it can be determined that this area is in a high-load state, and there may be risks of overheating or power waste. When the conduction time is much lower than this proportion, it indicates that the load level of this area is low, and the heating effect may be insufficient, and power compensation needs to be appropriately increased.

[0068] In the process of load level division, the system can also consider the dynamic change characteristics of the thyristor conduction time. Since the material, thickness, and ironing area of the clothing may change at any time, the load levels of each area will fluctuate accordingly. To adapt to this dynamic change, the system can adopt algorithms such as sliding window or weighted average to dynamically update the conduction time statistical values of each area and adjust the load level in real time based on the latest data to ensure the timeliness and accuracy of the division results.

[0069] S203. Allocate the pulse signals in the high-load area to adjacent low-load areas according to a preset time ratio. The system allocates the pulse signals in the high-load area to adjacent low-load areas according to a preset time ratio, specifically: calculate the difference between the actual conduction time of the low-load area and the preset duration to obtain the available load duration; calculate the remaining power capacity of the low-load area according to the available load duration; allocate the pulse signals in the high-load area to adjacent low-load areas according to the ratio of the remaining power capacity.

[0070] In this step, the system optimizes and balances the power distribution of the ironing board according to the high-load area and low-load area obtained by the previous step. Specifically, the system allocates some pulse signals in the high-load area to adjacent low-load areas according to a certain time ratio to relieve the working pressure of the thyristor in the high-load area, improve the heating effect in the low-load area at the same time, and achieve the power balance and optimization of the entire board.

[0071] When determining the allocation ratio of the pulse signals, the system needs to comprehensively consider factors such as the actual conduction time of the high-load area and low-load area, the current capacity of the thyristor, and the heat conduction characteristics. Usually, the allocation ratio can be set as the ratio of the available load duration of the low-load area to the excess part of the high-load area. The system first calculates the difference between the actual conduction time of the low-load area and the preset threshold to obtain the additional conduction duration it can bear. Then, the system converts this available load duration into the corresponding power capacity as the upper limit of the pulse signals that the low-load area can receive. Finally, the system divides the corresponding time slices from the pulse signals in the high-load area according to a certain ratio and allocates them to the low-load area to achieve dynamic power balance.

[0072] In the process of pulse signal allocation, the system can also consider the working characteristics of the thyristor and circuit constraints. Since the thyristor is a non-linear device, its conduction resistance and current capacity will change with the change of temperature and current. Therefore, when performing power distribution, it is necessary to appropriately adjust the amplitude and frequency of the pulse signals to ensure that the thyristor operates within a safe and stable range.

[0073] S204. During the process of pulse signal distribution, thyristors in the high-load area and the low-load area are alternately triggered at preset time intervals; In this step, while the system distributes pulse signals, it also needs to alternately trigger the thyristors in the high-load area and the low-load area to maintain the balance and stability of the temperature distribution on the soleplate of the electric iron. Specifically, the system sets a fixed time interval, such as dozens of milliseconds or hundreds of milliseconds. Within each interval, the thyristors in the high-load area and the low-load area are triggered successively, so that they are in an interleaved conduction state, avoiding problems such as long-term power concentration or excessive temperature.

[0074] When determining the time interval for alternate triggering, the system needs to comprehensively consider factors such as the conduction characteristics of the thyristor, the power supply frequency, and the temperature response time. Generally, the length of the time interval should match the conduction cycle of the thyristor, ensuring that each thyristor can complete at least one complete conduction process within an interval, while avoiding too long an interval resulting in temperature fluctuations or power waste. At the same time, to ensure the real-time and stability of control, the system also needs to accurately time and synchronize the time interval, and technologies such as high-precision timers or phase-locked loops can be used to ensure that the corresponding control signals can be accurately triggered at the start moment of each interval.

[0075] During the process of alternate triggering, the system also needs to monitor and feedback the conduction states of the thyristors in the high-load area and the low-load area in real time. Since in actual operation, the parameters of the thyristor may drift or malfunction, resulting in abnormal conduction time or current, the system needs to immediately collect signals such as the voltage and current of the thyristor after each trigger and compare them with the normal values to detect and diagnose potential problems in a timely manner. Once an abnormality is found in a certain thyristor, the system can quickly switch to a standby thyristor or adjust its trigger parameters to ensure the normal operation and safety performance of the electric iron.

[0076] S205. Detect the change in the conduction resistance of the thyristors in the high-load area and the low-load area during the alternate conduction process; In this step, the system detects and analyzes the change in the conduction resistance in real time during the alternate conduction of the thyristors in the high-load area and the low-load area. The conduction resistance is an important parameter reflecting the working state of the thyristor, and its size directly affects the conduction ability, power consumption, and heat generation characteristics of the thyristor. By monitoring the change trend of the conduction resistance, the system can timely detect the performance degradation or fault risk of the thyristor, providing a basis for subsequent fault diagnosis and performance optimization.

[0077] When performing on - resistance detection, the system can utilize the current and voltage sensors in the thyristor control circuit. During each conduction cycle, it can collect the voltage drop across the thyristor and the current value passing through it in real - time, and calculate the corresponding on - resistance according to Ohm's law. To improve the detection accuracy and reliability, the system can adopt high - speed sampling and filtering algorithms, perform multiple samplings within each AC half - cycle, and average or denoise the sampling results to eliminate the influence of interference factors such as power supply ripple and switching transients. At the same time, the system also needs to calibrate and calibrate the sensors regularly to ensure that their measurement accuracy and stability meet the requirements.

[0078] After obtaining the real - time data of the on - resistance, the system needs to perform trend analysis and anomaly diagnosis on it. Under normal circumstances, the on - resistance of the thyristor should remain within a relatively stable range, and its change rate will not exceed the upper limit determined by the physical characteristics of the device. However, when the thyristor is in a high - temperature, high - voltage, and high - frequency working environment for a long time, its internal structure may degenerate or be damaged, resulting in a gradual increase in the on - resistance and a decrease in the current - carrying capacity. By tracking the change curve of the on - resistance, the system can detect this abnormal trend in a timely manner and, according to its severity, take corresponding control measures, such as reducing the power output in this area, increasing the speed of the cooling fan, etc., to delay the aging process of the thyristor and extend its service life.

[0079] S206. When it is determined that the working state of any thyristor is abnormal based on the change in on - resistance, calculate the power adjustment coefficient of the thyristor based on the change in on - resistance; When it is determined that the working state of any thyristor is abnormal based on the change in on - resistance, the system calculates the power adjustment coefficient of the thyristor based on the change in on - resistance. Specifically: obtain the on - resistance values of the thyristor in multiple consecutive conduction cycles, and calculate the change rate of the on - resistance values; when the change rate exceeds the third preset threshold, determine that the thyristor is in an abnormal working state; take the ratio of the change rate to the third preset threshold as the power adjustment coefficient of the thyristor.

[0080] In this step, after the system monitors an abnormal change in the on - resistance of a certain thyristor, it needs to further analyze the cause and calculate the corresponding power adjustment coefficient to achieve the protection and dynamic optimization control of the thyristor. There are usually two cases of abnormal changes in the on - resistance: one is that the on - resistance is significantly higher than the normal value, indicating that the thyristor may have signs of aging, overheating, etc.; the other is that the on - resistance is significantly lower than the normal value, indicating that the thyristor may have control errors or short - circuit problems. For these two cases, the system needs to adopt different control strategies and algorithms to adjust the working parameters of the thyristor to make it return to a safe and stable state.

[0081] When the on-resistance increases abnormally, the system needs to correspondingly reduce the on-time or on-current of the thyristor to reduce its power consumption and thermal stress. The system can compare the actual on-resistance of the thyristor with its rated value to obtain a resistance change rate, and then map this change rate to a power adjustment coefficient, which is used as a correction factor for the duty cycle or amplitude of the thyristor trigger pulse signal. When the on-resistance exceeds a certain proportion (such as 20% or 50%) of the rated value, the system uses the ratio of the change rate to the preset threshold as the adjustment coefficient, multiplies it by the original pulse signal parameters, and obtains the adjusted control instruction.

[0082] When the on-resistance decreases abnormally, the system needs to correspondingly increase the on-time or on-current of the thyristor to compensate for its control deviation and improve the heating efficiency. Similar to the above situation, the system can also compare the change rate of the on-resistance with the preset threshold to obtain a reverse power adjustment coefficient. When the on-resistance is lower than a certain proportion of the rated value, the system multiplies the reciprocal of the change rate by the original pulse signal parameters to obtain the adjusted control instruction.

[0083] S207. Adjust the trigger delay angle of the thyristor according to the power adjustment coefficient to maintain the thyristor in an interleaved conduction state with the thyristors in adjacent areas.

[0084] In this step, the system dynamically adjusts the trigger control parameters of the thyristor with abnormalities according to the power adjustment coefficient calculated in the previous step, so that while ensuring its own safety and stability, it can also maintain a reasonable power ratio and interleaved conduction timing relationship with the thyristors in adjacent areas, avoiding problems such as excessive local temperature or serious power imbalance.

[0085] Specifically, the system converts the power adjustment coefficient into a correction amount of the thyristor trigger delay angle, and precisely controls its on-time and power by adjusting the delay time of the thyristor conduction pulse signal relative to the zero point of the AC power supply. When the adjustment coefficient is greater than 1, the system correspondingly increases the trigger delay angle, delays the on-time of the thyristor, and shortens its on-time in each half-cycle, thereby reducing its power output level; when the adjustment coefficient is less than 1, the system correspondingly reduces the trigger delay angle, advances the on-time of the thyristor, and prolongs its on-time, thereby increasing its power output level. In this way, the system can continuously and smoothly adjust its power according to the actual working state and abnormality degree of the thyristor, realizing dynamic overload protection and power optimization.

[0086] In the above embodiments, by collecting the actual conduction time of the thyristor, each area is divided into a high-load area and a low-load area, and part of the pulse signals in the high-load area are allocated to the adjacent low-load area according to a preset time ratio. At the same time, the thyristors in each area are controlled by an alternating trigger method, dynamically balancing the power loads of each area. The alternating trigger strategy reduces the current impact caused by simultaneous conduction by staggering the conduction moments of each area in time, reduces the stress on circuit components, improves the reliability of the system, and at the same time achieves a more uniform heat distribution.

[0087] The following describes the system in the embodiments of the present invention application from the perspective of hardware processing. Please refer to Figure 3 , which is a schematic structural diagram of an entity device of an output power control system applicable to an electric iron provided in an embodiment of the present application.

[0088] It should be noted that Figure 3 the structure of the system shown is only an example and should not bring any limitations to the functions and usage scopes of the embodiments of the present invention.

[0089] As Figure 3 shown, the system includes a central processing unit (CPU) 301, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 302 or the program loaded from the storage section 308 into the random access memory (RAM) 303, such as executing the method in the above embodiments. In the RAM 303, various programs and data required for system operation are also stored. The CPU 301, ROM 302, and RAM 303 are connected to each other via a bus 304. An input / output (I / O) interface 305 is also connected to the bus 304.

[0090] The following components are connected to the I / O interface 305: an input section 306 including a camera, an infrared sensor, etc.; an output section 307 including a liquid crystal display (LCD) and a speaker, etc.; a storage section 308 including a hard disk, etc.; and a communication section 309 including a network interface card such as a LAN (Local Area Network) card and a modem. The communication section 309 performs communication processing via a network such as the Internet. A driver 310 is also connected to the I / O interface 305 as needed. A removable medium 311, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the driver 310 as needed so that the computer program read from it can be installed into the storage section 308 as needed.

[0091] In particular, according to an embodiment of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, an embodiment of the present invention includes a computer program product that includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through the communication section 309, and / or installed from the removable medium 311. When the computer program is executed by the central processing unit (CPU) 301, various functions defined in the present invention are executed.

[0092] It should be noted that the computer-readable medium shown in the embodiments of the present invention can be a computer-readable signal medium, a computer-readable storage medium, or any combination of the two. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium can include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, the computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In the present invention, the computer-readable signal medium can include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable computer program. Such a propagated data signal can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above.

[0093] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present invention. In this context, each block in the flowchart or block diagram may represent a module, a segment of a program, or a portion of code that contains one or more executable instructions for implementing a specified logical function. It should also be noted that, in some alternative implementations, the functions marked in the blocks may occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram or flowchart, as well as combinations of blocks in the block diagram or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0094] As another aspect, the present invention also provides a computer-readable storage medium, which may be included in the system described in the above embodiments; or it may exist separately without being assembled into the system. The above storage medium carries one or more computer programs, and when the one or more computer programs are executed by a processor of a system, the system implements the method provided in the above embodiments.

[0095] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application.

[0096] As used in the above embodiments, depending on the context, the term "when..." can be interpreted as "if...", or "after...", or "in response to determining...", or "in response to detecting...". Similarly, depending on the context, the phrase "when determining..." or "if detecting (the stated condition or event)" can be interpreted as "if determining...", or "in response to determining...", or "when detecting (the stated condition or event)", or "in response to detecting (the stated condition or event)".

[0097] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid-state drive), etc.

[0098] Those of ordinary skill in the art can understand that all or part of the processes in the above method embodiments can be completed by instructing relevant hardware with a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The foregoing storage medium includes: various media that can store program codes such as ROM or random access memory RAM, magnetic disks, or optical discs.

Claims

1. A method for controlling output power of an electric iron, characterized in that: include: Calculating the temperature difference between adjacent preset temperature detection points based on the collected temperature data in the soleplate of the electric iron to obtain a local temperature gradient; When the rate of change of the local temperature gradient is greater than a first preset threshold, the corresponding area is determined as an initial contact area; the rate of change of the temperature gradient of the initial contact area is calculated, and a first power compensation coefficient is determined according to a preset compensation curve and the rate of change of the temperature gradient; When the rate of change of the local temperature gradient is less than the first preset threshold and greater than the second preset threshold, the corresponding area is determined as a continuous contact area; and a second power compensation coefficient is calculated based on the temperature uniformity coefficient of the continuous contact area; When the rate of change of the local temperature gradient is less than the second preset threshold, the corresponding area is determined as a disengagement area; and a third power compensation coefficient is determined according to the temperature drop rate of the disengagement area; Calculate the initial trigger delay angle, the continuous trigger delay angle and the disengagement trigger delay angle of the thyristor in the corresponding area according to the voltage value of the input end of the electric iron, the first power compensation coefficient, the second power compensation coefficient and the third power compensation coefficient; An initial pulse signal, a continuous pulse signal and a disengagement pulse signal corresponding to the initial contact area, the continuous contact area and the disengagement contact area are generated according to the initial trigger delay angle, the continuous trigger delay angle and the disengagement trigger delay angle, so that the thyristors of the initial contact area, the continuous contact area and the disengagement contact area control the output powers of the initial contact area, the continuous contact area and the disengagement contact area to be the initial target output power, the continuous target power and the disengagement target power respectively.

2. The method according to claim 1, characterized in that The calculating the temperature gradient change rate of the initial contact area and determining the first power compensation coefficient according to a preset compensation curve and the temperature gradient change rate specifically includes: Calculating the temperature gradient at every two adjacent sampling moments according to the local temperature gradient of the initial contact area; Performing a differential operation on the temperature gradient to obtain a temperature gradient change rate; Based on the numerical range of the temperature gradient change rate, selecting a matching curve segment from a preset compensation curve; The temperature gradient change rate is substituted into the function formula of the curve segment to calculate and obtain the first power compensation coefficient.

3. The method according to claim 1, characterized in that: The calculating of the initial trigger delay angle, the continuous trigger delay angle and the disengagement trigger delay angle of the thyristor in the corresponding area according to the voltage value of the input end of the electric iron, the first power compensation coefficient, the second power compensation coefficient and the third power compensation coefficient specifically includes: Comparing the voltage value at the input end of the electric iron with a preset standard voltage value to obtain a voltage correction coefficient; Multiplying the first power compensation coefficient, the second power compensation coefficient, and the third power compensation coefficient by the original power respectively to obtain an initial target output power, a continuous target power, and a disengagement target power corresponding to the initial contact area, the continuous contact area, and the disengagement area one by one; Multiplying the voltage correction coefficient by the initial target output power, the continuous target power and the disengagement target power respectively to obtain the corrected initial target output power, the continuous target power and the disengagement target power; The corresponding conduction angle is calculated based on the corrected initial target output power, continuous target power and disengagement target power in combination with the volt-ampere characteristic curve of the thyristor in the corresponding area; The conduction angle is converted into a trigger delay angle based on the zero-crossing point of the AC power supply to obtain an initial trigger delay angle, a continuous trigger delay angle and a release trigger delay angle.

4. The method according to claim 1, characterized in that: After sending the initial pulse signal, the continuous pulse signal and the detachment pulse signal to the thyristors in the initial contact area, the continuous contact area and the detachment contact area respectively, the method further includes: Collecting the actual conduction time of each thyristor during operation; Dividing the thyristors in each region into a high-load region and a low-load region according to the actual conduction time of each thyristor, the region where the actual conduction time exceeds the preset time length is the high-load region, and the region where the actual conduction time is lower than the preset time length is the low-load region; Allocating the pulse signal of the high-load area to the adjacent low-load area according to a preset time ratio, wherein the preset time ratio is determined according to the remaining conduction time of the low-load area; During the pulse signal distribution process, the thyristors in the high load area and the low load area are triggered alternately at every preset time interval.

5. The method according to claim 4, characterized in that The step of allocating the pulse signal of the high-load area to the adjacent low-load area according to a preset time ratio specifically includes: Calculate the difference between the actual conduction time in the low-load area and the preset duration to obtain the loadable duration; Calculating the remaining power capacity of the low-load area according to the loadable duration; The pulse signal of the high load region is distributed to the adjacent low load region in proportion to the remaining power capacity.

6. The method according to claim 4, characterized in that In the process of distributing the pulse signal, after the thyristors in the high load area and the low load area are triggered alternately at every preset time interval, the method further includes: Detecting the on-resistance changes of the thyristors in the high load region and the low load region during the alternating conduction process; When it is determined according to the on-resistance change that the working state of any of the thyristors is abnormal, calculating the power regulation coefficient of the thyristor based on the on-resistance change; The trigger delay angle of the thyristor is adjusted according to the power regulation coefficient so that the thyristor and the thyristors in the adjacent area maintain an alternating conduction state.

7. The method according to claim 6, characterized in that When it is determined according to the on-resistance change that any of the thyristors has an abnormal working state, calculating the power regulation coefficient of the thyristor based on the on-resistance change specifically includes: Obtaining the on-resistance value of the thyristor in a plurality of consecutive on-cycles, and calculating the rate of change of the on-resistance value; When the change rate exceeds a third preset threshold, it is determined that the thyristor is in an abnormal working state; The ratio of the change rate to the third preset threshold is used as the power regulation coefficient of the thyristor.

8. An output power control system suitable for an electric iron, characterized in that: The system comprises: One or more processors and a memory; the memory is coupled to the one or more processors, the memory is used to store computer program code, the computer program code includes computer instructions, and the one or more processors call the computer instructions to cause the system to execute the method as described in any one of claims 1-7.

9. A computer-readable storage medium comprising instructions, characterized in that: When the instructions are executed on a system, the system is caused to execute the method according to any one of claims 1 to 7.

10. A computer program product, characterized in that When the computer program product is run on a system, the system is caused to execute the method according to any one of claims 1 to 7.

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