Full-voltage control method for two-way silicon controlled rectifier air duct and air duct

Abstract

The invention provides a full-voltage control method for a double-channel silicon controlled air duct, which is applied to a full-voltage air duct and comprises the following steps: detecting zero crossing point time of a power grid to determine output frequency of the power grid; acquiring the rated frequency of the air duct; preset time is set, and the frequency difference value between the output frequency of the power grid and the rated frequency of the air duct within the preset time is obtained; inserting a plurality of time points in a preset time period; and the frequency difference value is split, and the split frequency difference value is distributed to each time point for wave loss, so that the output frequency of the power grid is adjusted to the rated frequency of the air duct within the preset time. The frequency difference value between the output frequency of the power grid and the rated frequency of the air duct is split and distributed, so that the air duct can work normally in various different power grid environments; by monitoring and adjusting the output frequency of the power grid within the preset time period in real time, it is ensured that the air duct always works in the optimal state, and the working efficiency of the air duct is improved.

Description

Technical Field

[0001] The present application relates to a field, and in particular to a dual-circuit thyristor wind duct full-voltage control method and a wind duct. Background Art

[0002] Hair dryers are a common device, usually used for heat dissipation, ventilation, heating and other applications. In these applications, the hair dryer usually contains one or more heating wires, and the heating power of these heating wires usually needs to be controlled according to specific needs. Traditionally, the heating wire control of the hair dryer is usually achieved by adjusting the voltage. However, there are some problems with the existing hair dryer control circuit. When the voltage range is wide and the heating wire needs to be controlled at different voltages, different circuits or switches are usually required to switch the voltage. This may lead to an increase in circuit complexity and cause inconvenience in maintenance and operation.

[0003] Referring to publication number CN220962205U, a dual-circuit thyristor wind duct full voltage control circuit and a wind duct are disclosed, which are used to control the heating wire of the wind duct. Two thyristor control circuits are used to control two heating wires respectively. When a high-voltage alternating current is connected, the control chip controls one of the heating wires to heat up. When a low-voltage alternating current is connected, the control chip controls the two heating wires to heat up, thereby realizing full-voltage heating wire control. In order to prevent the heating wire from overheating, two heating wires are used to work in turn to ensure that the heating wire is not overheated. Regardless of whether the voltage of the power grid is high or low, the heating wire must output stable power. However, the power grid frequencies of different countries are different. For example, the power grid of China is 50 Hz and the power grid of the United States is 60 Hz, while the rated frequency of the wind duct is unchanged, which makes the rated frequency wind duct fluctuate when used in different power grids in different countries, resulting in the risk of equipment damage. The traditional control method can only roughly adjust the power output of the heating wire, usually by selectively discarding a certain number of waveforms based on a fixed time period to reduce the time for the current to flow through the heating wire, thereby reducing its power consumption. However, this control strategy based on wave dropping has obvious limitations, especially when precise regulation of power output is required.

[0004] Therefore, it is necessary to provide a hair dryer and a control method that can be used normally under different frequency output power supplies. Summary of the invention

[0005] In view of this, it is necessary to provide a hair dryer and a control method that can be used normally under different frequency output power supplies to solve the above problems.

[0006] The embodiment of the present application provides a dual-circuit thyristor wind tube full-voltage control method, which is applied to a full-voltage wind tube. The wind tube includes a first control circuit, a second control circuit and a control chip. The control chip is electrically connected to the first control circuit and the second control circuit. The dual-circuit thyristor wind tube full-voltage control method includes the following steps:

[0007] Detect the zero-crossing time of the power grid to determine the output frequency of the power grid;

[0008] Get the rated frequency of the fan;

[0009] Setting a preset time, and obtaining a frequency difference between the output frequency of the power grid and the rated frequency of the wind duct within the preset time;

[0010] Insert multiple time points within a preset time period;

[0011] The frequency difference is split and allocated to the wave loss at each time point, so as to adjust the output frequency of the power grid to the rated frequency of the wind tunnel within a preset time.

[0012] In at least one embodiment of the present application, the step of "splitting the frequency difference and allocating the split frequency difference to the wave loss at each time point, so as to adjust the output frequency of the power grid to the rated frequency of the wind tunnel within a preset time" also includes the steps of:

[0013] Evenly distribute the frequency difference to each time point;

[0014] According to the evenly distributed frequency difference, a frequency threshold between the output frequency of the power grid and the rated frequency of the wind tube within a preset time is preset;

[0015] Determine whether the frequency difference is equal to the frequency threshold;

[0016] If the frequency difference is not equal to the frequency threshold, the frequency difference is allocated to each time point.

[0017] In at least one embodiment of the present application, the step of “evenly distributing the frequency difference to each time point” includes the steps of:

[0018] Evenly distribute multiple time points within the preset time period;

[0019] Evenly distribute the frequency difference to each time point.

[0020] In at least one embodiment of the present application, the step of "splitting the frequency difference and allocating the split frequency difference to the internal loss wave at each time point, so as to adjust the output frequency of the power grid to the rated frequency of the wind duct within a preset time" includes the steps of:

[0021] Determine whether the output frequency of the power grid after the preset time period is equal to the rated frequency of the wind duct after the preset time period;

[0022] If the relationship that the output frequency of the power grid after the preset time period is equal to the rated frequency of the wind duct after the preset time period is satisfied, the frequency difference of the current time period is determined based on the output frequency of the power grid in the current time period and the rated frequency of the wind duct.

[0023] In at least one embodiment of the present application, the step of “if the relationship that the frequency difference is not equal to the frequency threshold is satisfied, then allocating the frequency difference to each time point” includes the steps of:

[0024] Allocating the preset time periods to a first time period and a second time period that are consecutive in sequence;

[0025] Evenly distribute the difference to the first time period;

[0026] Determine the output frequency of the power grid in the first time period and the rated frequency of the wind duct in the first time period by evenly distributing the frequency difference to the first time period;

[0027] Determining whether the output frequency of the power grid in the first time period is not equal to the rated frequency of the wind duct in the first time period;

[0028] If the relationship that the output frequency of the power grid in the first time period is not equal to the rated frequency of the wind duct in the first time period is satisfied, then the first frequency total residual value of the output frequency of the power grid in the first time period is determined according to the difference between the output frequency of the power grid in the first time period and the rated frequency of the wind duct in the first time period;

[0029] The first frequency total residual value is allocated to the second time period.

[0030] In at least one embodiment of the present application, the step of “allocating the first frequency total residual value to the second time period” includes the steps of:

[0031] Inserting multiple time points into the second time period;

[0032] The first frequency total residual value is split, and the split first frequency total residual value is distributed to each time point.

[0033] In at least one embodiment of the present application, the step of "determining the output frequency of the power grid in the first time period and the rated frequency of the wind duct in the first time period by evenly allocating the frequency difference to the first time period" includes the steps of:

[0034] Determine a first frequency value of the power grid at the interval time point according to the interval time point between the first time period and the second time period;

[0035] Determine whether the first frequency value of the power grid at the interval time point is not equal to the rated frequency of the wind tube;

[0036] If the first frequency value of the power grid at the interval time point is not equal to the rated frequency of the wind duct, the first frequency residual value of the power grid is determined according to the difference between the first frequency value of the power grid at the interval time point and the rated frequency of the wind duct;

[0037] The first frequency residual value is allocated to the second time period.

[0038] In at least one embodiment of the present application, the step of "determining the output frequency of the power grid and the rated frequency of the wind duct in the first time period by evenly distributing the frequency difference to the first time period" includes the steps of:

[0039] equally splitting the first time period into a first interval segment and a second interval segment that are continuous;

[0040] Obtaining a first time point between the first interval and the second interval, and determining a second frequency value of the power grid at the first time point;

[0041] Determine whether the second frequency value of the power grid at the first time point is not equal to the rated frequency of the wind tube;

[0042] If the second frequency value of the power grid at the first time point is not equal to the rated frequency of the wind duct, then the second frequency residual value of the power grid at the first time point is determined according to the difference between the second frequency value of the power grid at the first time point and the rated frequency of the wind duct;

[0043] The second frequency residual value is allocated to the second interval, and the second frequency total residual value of the output frequency of the power grid and the rated frequency of the wind duct in the second time period is determined according to the output frequency of the power grid and the rated frequency of the wind duct in the second time period.

[0044] In at least one embodiment of the present application, the step of “assigning the frequency residual value to the second time period” further includes the steps of:

[0045] equally splitting the second time period into consecutive third interval segments and fourth interval segments;

[0046] Obtaining a second time point between the third interval and the fourth interval, and determining a third frequency value of the power grid at the second time point;

[0047] Determine whether the third frequency value of the power grid at the second time point is not equal to the rated frequency of the wind tube;

[0048] If the third frequency value of the power grid at the second time point is not equal to the rated frequency of the wind duct, then the third frequency residual value of the power grid at the second time point is determined according to the difference between the third frequency value of the power grid at the second time point and the rated frequency of the wind duct;

[0049] The third frequency residual value is allocated to the fourth interval.

[0050] An embodiment of the present application provides a wind duct, including any of the above-described dual-circuit thyristor wind duct full-voltage control methods.

[0051] The above-mentioned dual-channel thyristor full-voltage control method for wind ducts ensures that the wind duct can work normally in various different power grid environments by splitting and distributing the frequency difference between the output frequency of the power grid and the rated frequency of the wind duct; by real-time monitoring and adjusting the output frequency of the power grid within a preset time period, it ensures that the wind duct always works in the best condition, thereby improving the working efficiency of the wind duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of a dual-circuit thyristor wind tube full-voltage control method in an embodiment of the present application.

[0053] Figure 2 It is a schematic diagram of another embodiment of a dual-circuit thyristor wind cylinder full-voltage control method in the embodiment of the present application. DETAILED DESCRIPTION

[0054] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0055] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0056] The embodiment of the present application provides a dual-circuit thyristor wind tube full-voltage control method, which is applied to a full-voltage wind tube. The wind tube includes a first control circuit, a second control circuit and a control chip. The control chip is electrically connected to the first control circuit and the second control circuit. The dual-circuit thyristor wind tube full-voltage control method includes the following steps:

[0057] Detect the zero-crossing time of the power grid to determine the output frequency of the power grid;

[0058] Get the rated frequency of the fan;

[0059] Setting a preset time, and obtaining a frequency difference between the output frequency of the power grid and the rated frequency of the wind duct within the preset time;

[0060] Insert multiple time points within a preset time period;

[0061] The frequency difference is split and allocated to the wave loss at each time point, so as to adjust the output frequency of the power grid to the rated frequency of the wind tunnel within a preset time.

[0062] The above-mentioned dual-channel thyristor full-voltage control method for wind ducts ensures that the wind duct can work normally in various different power grid environments by splitting and distributing the frequency difference between the output frequency of the power grid and the rated frequency of the wind duct; by real-time monitoring and adjusting the output frequency of the power grid within a preset time period, it ensures that the wind duct always works in the best condition, thereby improving the working efficiency of the wind duct.

[0063] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0064] according to Figure 1-Figure 2 In an embodiment of the present application, a dual-circuit thyristor wind duct full-voltage control method is provided, which is applied to a full-voltage wind duct. The wind duct includes a first control circuit, a second control circuit and a control chip, and the control chip is electrically connected to the first control circuit and the second control circuit.

[0065] Specifically, the embodiment of the present application is applicable to full-voltage air ducts, the first control circuit is provided with a first thyristor and a first heating wire, the second control circuit is provided with a second thyristor and a second heating wire, the two heating wires are controlled by two thyristor control circuits respectively, when high-voltage alternating current is connected, the control chip controls one of the heating wires to heat, when low-voltage alternating current is connected, the control chip controls the two heating wires to heat, thereby realizing full-voltage heating wire control. By adjusting different grid frequencies in different regions, full-voltage air ducts can be used normally under different grid frequencies.

[0066] The dual-circuit thyristor wind tube full voltage control method comprises the following steps, wherein:

[0067] Step S100: Detect the zero-crossing time of the power grid to determine the output frequency of the power grid.

[0068] Specifically, the grid frequencies in different regions of the world are also different. The control chip can accurately determine the current grid output frequency by detecting the zero-crossing time of the grid, thereby providing accurate basic data for subsequent frequency adjustments.

[0069] Step S200: obtaining the rated frequency of the air duct.

[0070] Step S300, setting a preset time, and obtaining a frequency difference between the output frequency of the power grid and the rated frequency of the wind duct within the preset time.

[0071] Specifically, the preset time can be determined according to the output frequency of the power grid, and can usually be set as a multiple of one or more power grid cycles. The difference between the output frequency of the power grid and the rated frequency of the wind duct in the preset time period is calculated to obtain the frequency difference between the output frequency of the power grid and the rated frequency of the wind duct.

[0072] Step S400: insert multiple time points within a preset time period.

[0073] Specifically, by inserting multiple time points, frequency adjustment can be performed on a finer time scale, thereby improving the accuracy and stability of the adjustment.

[0074] Step S500, split the frequency difference, and distribute the split frequency difference to the wave loss at each time point, so as to adjust the output frequency of the power grid to the rated frequency of the wind tunnel within a preset time.

[0075] Specifically, the frequency difference is divided into multiple small parts, and these small parts are allocated to each time point, and the frequency is adjusted by dropping waves, thereby avoiding sudden and large frequency changes and improving the stability and security of the system.

[0076] Furthermore, wave dropping reduces the output power by selectively dropping part or all of the cycles of the grid voltage waveform. When the output power of the grid needs to be reduced, some complete waveform cycles can be dropped within a specific time period, and only the remaining waveform cycles are retained. The wave dropping cycle is the frequency difference between the output frequency of the grid and the rated frequency of the wind tube within a preset time.

[0077] In summary, the wind duct is started, and the control chip in the wind duct starts working. The control chip determines the output frequency of the current power grid (for example, the output frequency of the power grid is 50Hz) by detecting the zero-crossing time of the power grid. The rated frequency of the wind duct is obtained from the design parameters of the wind duct. A preset time period (for example, 5 seconds) is set according to the output frequency of the power grid. Within the preset time period, the output frequency of the power grid is continuously monitored and compared with the rated frequency of the wind duct, and the frequency difference between the output frequency of the power grid and the rated frequency of the wind duct within the preset time is calculated. Multiple time points are inserted within the preset time period (for example, 10 time points are inserted per second), and each time point corresponds to a waveform cycle. The frequency difference is split into multiple small parts, and these small parts are allocated to each time point. By dropping waves, a certain proportion of waveform cycles are discarded at each time point until the required frequency adjustment amount is reached. Within the preset time period, the output frequency of the power grid is gradually approached to the rated frequency of the wind duct by gradually adjusting the frequency at each time point. By splitting the frequency difference and allocating the wave dropping cycle, the output power of the wind duct can be accurately controlled, the adaptability and stability of the equipment can be improved, and the interference of the power grid can be reduced.

[0078] In a specific embodiment, step S500, splitting the frequency difference and allocating the split frequency difference to the wave loss at each time point, so as to adjust the output frequency of the power grid to the rated frequency of the wind tunnel within a preset time, further includes the steps of:

[0079] Step S510: Evenly distribute the frequency difference to each time point.

[0080] Specifically, the frequency difference is evenly divided, and the evenly divided frequency difference is allocated to each time point in a preset time period.

[0081] Step S520: preset a frequency threshold between the output frequency of the power grid and the rated frequency of the wind tunnel within a preset time according to the evenly distributed frequency difference.

[0082] Specifically, the frequency threshold can be obtained according to the evenly distributed frequency difference, so as to determine whether the frequency difference between the output frequency of the power grid and the rated frequency of the wind duct can be evenly distributed within a preset time period.

[0083] Step S530: determine whether the frequency difference is equal to the frequency threshold.

[0084] Step S540: If the frequency difference is not equal to the frequency threshold, the frequency difference is allocated to each time point.

[0085] Specifically, according to the actual frequency difference, the frequency difference is flexibly allocated to each time point to perform the wave dropping operation.

[0086] In summary, within the preset time period, the frequency difference between the power grid output frequency and the rated frequency of the wind duct is calculated. The preset frequency threshold is used as the upper limit of the frequency difference. If the calculated frequency difference is equal to the preset frequency threshold, the frequency difference is evenly distributed to each time point for wave dropping operation. For example, if the frequency difference is 2Hz and there are 10 time points, a frequency difference of 0.2Hz is allocated to each time point for adjustment. If the calculated frequency difference is not equal to the preset frequency threshold, the frequency difference is flexibly allocated to each time point for wave dropping operation according to the actual frequency difference. For example, if the frequency difference is 3Hz and there are 10 time points, different frequency differences can be allocated to each time point according to the specific situation. Within the preset time period, the output frequency of the power grid is monitored and adjusted in real time to ensure that it gradually approaches the rated frequency of the wind duct. After the preset time period ends, the output frequency of the power grid is detected again. If the rated frequency of the wind duct is reached, the current state is maintained; otherwise, the adjustment continues.

[0087] In a specific embodiment, step S510 of “evenly distributing the frequency difference to each time point” includes the following steps:

[0088] Step S11, evenly distribute multiple time points within a preset time period.

[0089] Specifically, by evenly allocating multiple time points to a preset time period, it is ensured that the output frequency adjustment of the power grid within the preset time period is evenly performed.

[0090] Step S12: Evenly distribute the frequency difference to each time point.

[0091] Specifically, the frequency difference is processed uniformly, and the processed frequency difference is evenly distributed to each time point, so as to avoid large-scale frequency adjustment at a certain moment, reduce the instantaneous impact on the equipment, and improve the stability and life of the equipment.

[0092] In summary, the wind duct is started, the control chip starts working, and the current output frequency of the power grid and the rated frequency of the wind duct are obtained through the detection circuit. Within the preset time period, the frequency difference between the output frequency of the power grid and the rated frequency of the wind duct is calculated. A reasonable frequency threshold is preset as the upper limit of the frequency difference. If the calculated frequency difference is equal to the preset frequency threshold, multiple time points are evenly distributed within the preset time period. For example, if the preset time period is 1 second, 1 second can be divided into 10 equally spaced time points, and each time point is 100 milliseconds apart. The frequency difference is evenly distributed to each time point for wave dropping operation. For example, if the frequency difference is 2Hz and there are 10 time points, a frequency difference of 0.2Hz is allocated to each time point for adjustment. After the preset time period ends, the output frequency of the power grid is detected again. If the rated frequency of the wind duct is reached, the current state is maintained; otherwise, the adjustment continues.

[0093] In a specific embodiment, step S500 "splitting the frequency difference and allocating the split frequency difference to the wave loss at each time point, so as to adjust the output frequency of the power grid to the rated frequency of the wind tunnel within a preset time" includes the steps of:

[0094] Step S600: Determine whether the output frequency of the power grid after the preset time period ends is equal to the rated frequency of the wind duct after the preset time period ends.

[0095] Specifically, it is determined whether the output frequency of the power grid is adjusted to reach the rated frequency of the wind duct within a preset time period.

[0096] Step S700: If the output frequency of the power grid after the preset time period is equal to the rated frequency of the wind duct after the preset time period, the frequency difference of the current time period is determined according to the output frequency of the power grid in the current time period and the rated frequency of the wind duct.

[0097] Specifically, when the output frequency of the power grid is adjusted to be equal to the rated frequency of the wind duct within a preset time period, the system still continues to monitor and adjust the change of the power grid frequency within the next preset time period in real time.

[0098] To summarize, within the preset time period, the output frequency of the power grid is monitored and adjusted in real time to ensure that it gradually approaches the rated frequency of the wind duct. After the preset time period ends, determine whether the output frequency of the power grid is equal to the rated frequency of the wind duct. If the relationship that the output frequency of the power grid after the preset time period ends is equal to the rated frequency of the wind duct after the preset time period ends is satisfied, then determine whether there is a frequency difference in the current time period based on the output frequency of the power grid in the current time period and the rated frequency of the wind duct. Continue to adjust or maintain the current state based on the frequency difference in the current time period. If adjustment needs to continue, repeat steps S400-S500; if adjustment is not required, maintain the current state.

[0099] In a specific embodiment, S540 “if the frequency difference is not equal to the frequency threshold, assigning the frequency difference to each time point” includes the steps of:

[0100] Step S541: Allocate the preset time period to a first time period and a second time period that are consecutive in sequence.

[0101] Specifically, dividing the entire preset time period into two consecutive time periods helps to gradually adjust the frequency of the power grid and avoid system instability caused by excessive one-time adjustment. By processing in stages, the frequency adjustment process can be controlled more accurately, improving the reliability and stability of the system.

[0102] Step S542: Evenly distribute the difference to the first time period.

[0103] Specifically, in the first time period, the calculated frequency difference is evenly distributed to each time point to perform the wave dropping operation.

[0104] Step S543, determining the output frequency of the power grid in the first time period and the rated frequency of the wind duct in the first time period according to evenly distributing the frequency difference to the first time period;

[0105] Specifically, it is ensured that within the first time period, the system can track the effect of the output frequency adjustment of the power grid in real time and make dynamic adjustments according to the frequency changes.

[0106] Step S544: determine whether the output frequency of the power grid in the first time period is not equal to the rated frequency of the wind duct in the first time period.

[0107] Step S545: If the output frequency of the power grid in the first time period is not equal to the rated frequency of the wind duct in the first time period, determine the first frequency total residual value of the output frequency of the power grid in the first time period based on the difference between the output frequency of the power grid in the first time period and the rated frequency of the wind duct in the first time period.

[0108] Specifically, in the first time period, the difference between the output frequency of the power grid and the rated frequency of the wind duct is accurately calculated, that is, the first frequency total residual value of the output frequency of the power grid in the first time period.

[0109] Step S546: Allocate the first frequency total residual value to the second time period.

[0110] Specifically, the difference between the output frequency of the power grid and the rated frequency of the wind duct in the first time period is allocated to the second time period for wave dropping operation, and the output frequency of the power grid is continuously adjusted. By extending the adjustment time, it is ensured that the output frequency of the power grid can gradually approach the rated frequency of the wind duct.

[0111] In summary, the wind duct is started, the control chip starts working, and the output frequency of the current power grid and the rated frequency of the wind duct are obtained through the detection circuit. Within the preset time period, the frequency difference between the output frequency of the power grid and the rated frequency of the wind duct is calculated. A reasonable frequency threshold is preset as the upper limit of the frequency difference. If the calculated frequency difference is not equal to the preset frequency threshold, step S540 is entered. The preset time period is divided into a first time period and a second time period that are consecutive in sequence. In the first time period, the frequency difference is evenly distributed to each time point for wave loss operation. According to the evenly distributed frequency difference, the output frequency of the power grid and the rated frequency of the wind duct in the first time period are monitored and determined in real time. After the first time period ends, it is determined whether the output frequency of the power grid is equal to the rated frequency of the wind duct. If the output frequency of the power grid is not equal to the rated frequency of the wind duct, that is, after the first time period ends, there is still a difference between the output frequency of the power grid and the rated frequency of the wind duct, the first frequency total residual value of the output frequency of the power grid in the first time period is calculated. The first frequency total residual value is distributed to the second time period for wave loss operation. Repeat the above step S544 until the output frequency of the power grid reaches the rated frequency of the wind duct.

[0112] In a specific embodiment, step S546 “allocating the first frequency total residual value to the second time period” includes the steps of:

[0113] Step S60: insert multiple time points into the second time period.

[0114] Specifically, by inserting a plurality of time points in the second time period, the entire second time period can be divided into smaller sub-time periods, thereby more precisely controlling the frequency adjustment process.

[0115] Step S61: split the first frequency total residual value, and distribute the split first frequency total residual value to each time point.

[0116] Specifically, the remaining first frequency total residual value in the first time period is split into multiple parts, and each part is allocated to each time point for wave dropping operation. Splitting the first frequency total residual value and allocating it to each time point can avoid large-scale frequency adjustment at a certain time point in the second time period, thereby reducing the instantaneous impact on the power grid and equipment. This allocation method helps to maintain the stability and continuity of the system and ensure a smooth frequency adjustment process.

[0117] In a specific embodiment, step S542 "evenly distribute the difference to the first time period" includes the steps of:

[0118] Step S20: Determine a first frequency value of the power grid at the interval time point according to the interval time point between the first time period and the second time period.

[0119] Specifically, the interval time point is the last time point of the first time period and the starting time point of the second time period, that is, the interval time point is the dividing point between the first time period and the second time period.

[0120] Step S21, determining whether the first frequency value of the power grid at the interval time point is not equal to the rated frequency of the wind duct.

[0121] Specifically, by judging the output frequency of the power grid at the interval time point, it is timely discovered whether there is a deviation between the output frequency of the power grid at the interval time point and the rated frequency of the wind duct.

[0122] Step S22: if the first frequency value of the power grid at the interval time point is not equal to the rated frequency of the wind duct, determine the first frequency residual value of the power grid according to the difference between the first frequency value of the power grid at the interval time point and the rated frequency of the wind duct.

[0123] Specifically, the difference between the output frequency of the power grid and the rated frequency of the wind duct at the interval time point is calculated, that is, the first frequency residual value at the interval time point. The first frequency residual value is the difference generated by the frequency difference after the first time period ends in the preset time period.

[0124] Step S23: Allocate the first frequency residual value to the second time period.

[0125] Specifically, the first frequency residual value at the interval time point is allocated to the second time period, and the difference of the previous time period is allocated to the next time period, thereby extending the adjustment time to ensure that the grid frequency can gradually approach the rated frequency of the wind duct.

[0126] In a specific embodiment, step S543, "determining the output frequency of the power grid and the rated frequency of the wind duct in the first time period according to evenly distributing the frequency difference to the first time period" includes the steps of:

[0127] Step S30: equally split the first time period into continuous first interval segments and second interval segments.

[0128] Step S31, obtaining a first time point between a first interval and a second interval, and determining a second frequency value of the power grid at the first time point.

[0129] Specifically, the first time point is a middle time point between the first interval segment and the second interval segment, and the second frequency value of the power grid at this time point is measured and confirmed.

[0130] Step S32: determine whether the second frequency value of the power grid at the first time point is not equal to the rated frequency of the wind duct.

[0131] Specifically, by performing frequency judgment after allocating the difference on the first interval segment, it can be discovered in time whether there is a deviation in the grid frequency at the first moment. If there is a deviation, that is, the grid output frequency of the previous stage is not equal to the rated frequency of the wind duct, resulting in a frequency difference in the previous stage. After allocating the frequency difference of the previous stage to the next stage, the situation where the grid output frequency is equal to the rated frequency of the wind duct is still not met.

[0132] Step S33: if the second frequency value of the power grid at the first time point is not equal to the rated frequency of the wind duct, determine the second frequency residual value of the power grid at the first time point according to the difference between the second frequency value of the power grid at the first time point and the rated frequency of the wind duct.

[0133] Specifically, the difference between the grid frequency and the rated frequency of the wind duct at the first time point is calculated, that is, the second frequency residual value. By calculating the second frequency residual value, the difference between the grid frequency and the rated frequency of the wind duct in the first time period can be clearly determined. This provides a basis for frequency adjustment in the second time period, ensuring the accuracy and effectiveness of the adjustment.

[0134] Step S34, allocating the second frequency residual value to the second interval, and determining the second frequency total residual value of the output frequency of the grid and the rated frequency of the wind duct in the second time period according to the difference between the output frequency of the grid and the rated frequency of the wind duct in the second time period.

[0135] Specifically, the calculated second frequency residual value is distributed to the second interval to perform the wave dropping operation, and the second frequency total residual value is determined according to the difference between the output frequency of the power grid and the rated frequency of the wind duct in the second time period.

[0136] In a specific embodiment, step S546 "allocating the frequency residual value to the second time period" further includes the steps of:

[0137] Step S62: equally divide the second time period into consecutive third interval segments and fourth interval segments.

[0138] Specifically, the second time period is equally divided into continuous third interval segments and fourth interval segments, so as to finely control the frequency adjustment process.

[0139] Step S63: Acquire a second time point between the third interval and the fourth interval, and determine a third frequency value of the power grid at the second time point.

[0140] Specifically, the second time point is the end time point of the third interval and the start time point of the fourth interval. The output frequency of the power grid at the second time point is determined as the third frequency value of the power grid. The third frequency value of the power grid is the difference left when the output frequency of the power grid fails to be equal to the rated frequency of the wind duct in the third interval.

[0141] Step S64, determine whether the third frequency value of the power grid at the second time point is not equal to the rated frequency of the wind duct; by performing frequency judgment at the second time point, the deviation of the power grid frequency at the second time point can be discovered in time.

[0142] Step S65: if the third frequency value of the power grid at the second time point is not equal to the rated frequency of the wind duct, determine the third frequency residual value of the power grid at the second time point according to the difference between the third frequency value of the power grid at the second time point and the rated frequency of the wind duct;

[0143] Specifically, the difference between the grid frequency and the rated frequency of the wind duct at the second time point is calculated, that is, the third frequency residual value. The difference between the grid frequency and the rated frequency of the wind duct at the second time point and in the third interval can be clearly determined by the calculated third frequency residual value.

[0144] Step S66, allocating the third frequency residual value to the fourth interval.

[0145] Specifically, the calculated third frequency residual value is distributed to each time point in the fourth interval for wave dropping operation, that is, the waveform period of the third frequency residual value is split, and the split waveform period of the third frequency residual value is distributed to the fourth interval.

[0146] In a specific embodiment, a wind duct includes any of the above-described dual-circuit thyristor wind duct full-voltage control methods.

[0147] Specifically, in the embodiments of the present application, any one of the above-mentioned methods is applied to the wind duct. By adopting this control method, the wind duct can operate stably and efficiently in various power grid environments, ensuring its normal operation under different voltage conditions, thereby improving the adaptability and reliability of the wind duct.

[0148] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A dual-circuit thyristor air duct full voltage control method, applied to a full voltage air duct, the air duct comprises a first control circuit, a second control circuit and a control chip, the control chip is electrically connected to the first control circuit and the second control circuit, characterized in that: The dual-circuit thyristor wind tube full voltage control method comprises the following steps: Detect the zero-crossing time of the power grid to determine the output frequency of the power grid; Get the rated frequency of the fan; Setting a preset time, and obtaining a frequency difference between the output frequency of the power grid and the rated frequency of the wind duct within the preset time; Insert multiple time points within a preset time period; The frequency difference is split and allocated to the wave loss at each time point, so as to adjust the output frequency of the power grid to the rated frequency of the wind tunnel within a preset time.

2. A dual-circuit thyristor wind tube full voltage control method according to claim 1, characterized in that: The step of "splitting the frequency difference and allocating the split frequency difference to the wave loss at each time point, so as to adjust the output frequency of the power grid to the rated frequency of the wind duct within a preset time" also includes the steps of: Evenly distribute the frequency difference to each time point; According to the evenly distributed frequency difference, a frequency threshold between the output frequency of the power grid and the rated frequency of the wind tube within a preset time is preset; Determine whether the frequency difference is equal to the frequency threshold; If the frequency difference is not equal to the frequency threshold, the frequency difference is allocated to each time point.

3. A dual-circuit thyristor wind tube full voltage control method according to claim 2, characterized in that: The step of "evenly distributing the frequency difference to each time point" includes the steps of: Evenly distribute multiple time points within the preset time period; Evenly distribute the frequency difference to each time point.

4. A dual-circuit thyristor wind tube full voltage control method according to claim 1, characterized in that: The step of "splitting the frequency difference and allocating the split frequency difference to the internal wave loss at each time point, so as to adjust the output frequency of the power grid to the rated frequency of the wind duct within a preset time" includes the steps of: Determine whether the output frequency of the power grid after the preset time period is equal to the rated frequency of the wind duct after the preset time period; If the relationship that the output frequency of the power grid after the preset time period is equal to the rated frequency of the wind duct after the preset time period is satisfied, the frequency difference of the current time period is determined according to the output frequency of the power grid in the current time period and the rated frequency of the wind duct.

5. A dual-circuit thyristor wind tube full voltage control method according to claim 2, characterized in that: The step of "if the frequency difference is not equal to the frequency threshold, assigning the frequency difference to each time point" includes the steps of: Allocating the preset time periods to a first time period and a second time period that are consecutive in sequence; Evenly distribute the difference to the first time period; Determine the output frequency of the power grid in the first time period and the rated frequency of the wind duct in the first time period by evenly distributing the frequency difference to the first time period; Determining whether the output frequency of the power grid in the first time period is not equal to the rated frequency of the wind duct in the first time period; If the relationship that the output frequency of the power grid in the first time period is not equal to the rated frequency of the wind duct in the first time period is satisfied, then the first frequency total residual value of the output frequency of the power grid in the first time period is determined according to the difference between the output frequency of the power grid in the first time period and the rated frequency of the wind duct in the first time period; The first frequency total residual value is allocated to the second time period.

6. A dual-circuit thyristor wind tube full voltage control method according to claim 5, characterized in that: The step of "distributing the first frequency total residual value to the second time period" comprises the steps of: Inserting multiple time points into the second time period; The first frequency total residual value is split, and the split first frequency total residual value is distributed to each time point.

7. A dual-circuit thyristor wind tube full voltage control method according to claim 5, characterized in that: The step of "determining the output frequency of the power grid in the first time period and the rated frequency of the wind duct in the first time period by evenly distributing the frequency difference to the first time period" includes the steps of: Determine a first frequency value of the power grid at the interval time point according to the interval time point between the first time period and the second time period; Determine whether the first frequency value of the power grid at the interval time point is not equal to the rated frequency of the wind tube; If the first frequency value of the power grid at the interval time point is not equal to the rated frequency of the wind duct, the first frequency residual value of the power grid is determined according to the difference between the first frequency value of the power grid at the interval time point and the rated frequency of the wind duct; The first frequency residual value is allocated to the second time period.

8. A dual-circuit thyristor wind tube full voltage control method according to claim 5, characterized in that: The step of "determining the output frequency of the power grid and the rated frequency of the wind duct in the first time period by evenly distributing the frequency difference to the first time period" includes the steps of: equally splitting the first time period into a first interval segment and a second interval segment that are continuous; Obtaining a first time point between the first interval and the second interval, and determining a second frequency value of the power grid at the first time point; Determine whether the second frequency value of the power grid at the first time point is not equal to the rated frequency of the wind tube; If the second frequency value of the power grid at the first time point is not equal to the rated frequency of the wind duct, then the second frequency residual value of the power grid at the first time point is determined according to the difference between the second frequency value of the power grid at the first time point and the rated frequency of the wind duct; The second frequency residual value is allocated to the second interval, and the second frequency total residual value of the output frequency of the power grid and the rated frequency of the wind duct in the second time period is determined according to the output frequency of the power grid and the rated frequency of the wind duct in the second time period.

9. A dual-circuit thyristor wind tube full voltage control method according to claim 5, characterized in that: The step of "allocating the frequency residual value to the second time period" also includes the steps of: equally splitting the second time period into consecutive third interval segments and fourth interval segments; Obtaining a second time point between the third interval and the fourth interval, and determining a third frequency value of the power grid at the second time point; Determine whether the third frequency value of the power grid at the second time point is not equal to the rated frequency of the wind tube; If the third frequency value of the power grid at the second time point is not equal to the rated frequency of the wind duct, then the third frequency residual value of the power grid at the second time point is determined according to the difference between the third frequency value of the power grid at the second time point and the rated frequency of the wind duct; The third frequency residual value is allocated to the fourth interval.

10. A hair dryer, characterized in that: When the wind tube is in operation, the dual-circuit thyristor wind tube full-voltage control method as described in any one of claims 1-9 is executed.

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