Control method, electrical device, and storage medium

Abstract

A control method, an electrical device, and a storage medium (200). The control method comprises: acquiring each complete cycle of an alternating current on the basis of a zero-crossing signal, the complete cycle comprising a positive cycle and a negative cycle having opposite voltage directions; and controlling the on-off state of a switch (23) within a preset time period, the switch (23) being turned off at least once in each complete cycle.

Description

[Corrected from Rule 91, 09.07.2025] Control methods, electrical equipment and storage media Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a control method, electrical equipment, and storage medium. Background Technology

[0002] In related technologies, high-power electrical equipment using alternating current, such as drying equipment (e.g., hair dryers, tumble dryers), heating equipment, refrigeration equipment, hair styling tools, beauty equipment, and medical instruments, includes power load units capable of converting electrical energy into other forms of energy. The power load unit is typically controlled by a switch (e.g., a silicon controlled rectifier) ​​that controls its duty cycle, i.e., the ratio of the on-time to the total time. Assume the full-load power of the power load unit is P. max When the duty cycle is 100%, the output power of the power load unit is P. max For example, when a medium output power is required, the duty cycle is adjusted to 50%. In this case, the output power of the power load unit is 50%P. max This control method essentially involves high-frequency cutting off or switching on the power supply to the power load unit. When the power supply to the power load unit is cut off, the load on the power grid is 0; when the power supply to the power load unit is switched on, the load on the power grid is P. max Because electrical equipment with power load units is considered high-power equipment, high-frequency switching can cause the grid load to fluctuate between 0 and P. max The changes between them are rapid, when P max When the voltage fluctuations are large, such rapid changes can affect other devices connected to the power grid (especially optical radiation devices) or high-power electrical equipment itself, impacting the user experience.

[0003] Summary of the Invention

[0004] This application provides a control method, electrical equipment, and storage medium.

[0005] This application provides a control method for an electrical device, the electrical device including a switch and a power load unit, the switch being electrically connected to the power load unit. When the switch is on, current flows through the switch to the power load unit to power the power load unit. The control method includes: acquiring each complete cycle of the alternating current based on a zero-crossing signal, the complete cycle including a positive cycle and a negative cycle with opposite voltage directions; and controlling the on / off state of the switch within a preset time period, the switch being off at least once in each complete cycle.

[0006] Another control method provided in this application is used for an electrical device, the electrical device including at least two power load modules connected in parallel; each power load module includes a switch and a power load unit connected to each other, wherein when the switch is on, current flows through the switch to the power load unit to power the power load unit for operation. The control method includes: controlling each power load module to be in at least one of the following three operating states within a preset time, and / or controlling each power load module to switch between any two of the following three operating states: a first state, the switch remains off; a second state, the switch remains on; a third state (50%), in which each complete cycle of the AC current is obtained according to a zero-crossing signal, and the switch is off at least once in each complete cycle.

[0007] An electrical device provided in this application includes a housing, at least one power load unit, at least one switch, a zero-crossing detection circuit, and a controller. The power load unit is disposed within the housing. Each switch is electrically connected to one of the power load units. When a switch is on, current flows through the switch to the corresponding power load unit to power the unit. The zero-crossing detection circuit generates a zero-crossing signal based on the alternating current. The controller is electrically connected to at least one of the switches and executes the control method of this application. The control method includes: acquiring complete cycles of the alternating current based on the zero-crossing signal, the complete cycle including a positive cycle and a negative cycle with opposite voltage directions; and controlling the on / off state of the switch within a preset time period, wherein the switch is off at least once in each complete cycle.

[0008] Another electrical device provided in this application includes a housing, at least one power load unit, at least one switch, a zero-crossing detection circuit, and a controller. The power load unit is disposed in the housing. Each switch is electrically connected to one of the power load units. When a switch is on, current flows through the switch to the corresponding power load unit to power the power load unit. The zero-crossing detection circuit generates a zero-crossing signal based on the alternating current. The controller is electrically connected to at least one of the switches and executes the control method of this application. The control method includes: controlling each power load module to at least one of the following operating states within a preset time, and / or controlling each power load module to switch between the following two operating states: a first state where the switch remains off; a second state where the switch remains on; and a third state (50%) where each complete cycle of the alternating current is obtained based on the zero-crossing signal, and the switch is off at least once in each complete cycle.

[0009] This application provides a storage medium storing a program that, when executed by a processor, implements the control method of this application. The control method includes: acquiring complete cycles of alternating current based on a zero-crossing signal, the complete cycle including a positive cycle and a negative cycle with opposite voltage directions; and controlling the on / off state of a switch within a preset time period, wherein the switch is disconnected at least once in each complete cycle.

[0010] Another storage medium provided in this application embodiment stores a program that, when executed by a processor, implements the control method of this application embodiment. The control method includes: controlling each power load module to at least one of the following operating states within a preset time period, and / or controlling each power load module to switch between the following two operating states: a first state where the switch remains open; a second state where the switch remains on; and a third state (50%) where each complete cycle of the AC power is obtained based on a zero-crossing signal, and the switch is opened at least once in each complete cycle.

[0011] In the control method, electrical equipment, and storage medium of this application embodiment, the on / off state of a switch is controlled within a preset time. The switch is disconnected at least once in each complete cycle. Thus, in this embodiment, the frequency of the power grid load change is greater than or equal to the frequency of alternating current. At this time, the flicker frequency of the optical radiation device connected to the power grid is also greater than or equal to the frequency of alternating current. That is, the flicker frequency of the optical radiation device connected to the power grid due to the influence of the switch is greater than or equal to 50Hz or 60Hz. Since the human eye is most sensitive to flicker in the frequency range of 10Hz-30Hz, this embodiment can ensure that the flicker frequency of the optical radiation device is higher than the flicker sensitivity range of the human eye. In other words, the bright and dark flickering of the optical radiation device connected to the power grid will not affect the user, thereby improving the user experience.

[0012] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0014] Figure 1(a) is a schematic diagram of the structure of an electrical device according to some embodiments of this application;

[0015] Figure 1(b) is a structural schematic diagram of an electrical device according to some other embodiments of this application;

[0016] Figure 2 is a schematic diagram of the connection of power supply and electrical equipment in some embodiments of this application;

[0017] Figure 3 is a flowchart illustrating the control method of some embodiments of this application;

[0018] Figure 4 is a schematic diagram of the control method of some embodiments of this application;

[0019] Figure 5 is a flowchart illustrating the control method of some embodiments of this application;

[0020] Figure 6 is a schematic diagram of the control method of some embodiments of this application;

[0021] Figure 7 is a schematic diagram of the control method of some embodiments of this application;

[0022] Figure 8 is a flowchart illustrating the control method of some embodiments of this application;

[0023] Figure 9 is a flowchart illustrating the control method of some embodiments of this application;

[0024] Figure 10 is a flowchart illustrating the control method of some embodiments of this application;

[0025] Figure 11 is a schematic diagram of the connection state between the storage medium and the controller in some embodiments of this application.

[0026] Explanation of main component symbols: Drying equipment 100; Storage medium 200, program 210; Power supply 300; Housing 10; Power load module 20, Heater 21, Switch 23; Radiation source 30; Zero-crossing detection circuit 40; Controller 50; Gear selection structure 60; Stepless adjustment structure 70; Rectifier circuit 80; Voltage divider circuit 90. Detailed Implementation

[0027] The embodiments of this application will be further described below with reference to the accompanying drawings. The same or similar reference numerals in the drawings denote the same or similar elements or elements having the same or similar functions throughout. Furthermore, the embodiments of this application described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting this application.

[0028] In related technologies, high-power electrical equipment using alternating current, such as drying equipment (e.g., hair dryers, tumble dryers), heating equipment, refrigeration equipment, hair styling tools, beauty equipment, and medical instruments, includes power load units capable of converting electrical energy into other forms of energy. The power load unit is typically controlled by a switch (e.g., a silicon controlled rectifier) ​​that controls its duty cycle, i.e., the ratio of the on-time to the total time. Assume the full-load power of the power load unit is P. maxWhen the duty cycle is 100%, the output power of the power load unit is P. max For example, when a medium output power is required, the duty cycle is adjusted to 50%. In this case, the output power of the power load unit is 50%P. max This control method essentially involves high-frequency cutting off or switching on the power supply to the power load unit. When the power supply to the power load unit is cut off, the load on the power grid is 0; when the power supply to the power load unit is switched on, the load on the power grid is P. max Because electrical equipment with power load units is considered high-power equipment, high-frequency switching can cause the grid load to fluctuate between 0 and P. max The changes between them are rapid, when P max When the voltage fluctuations are large, such rapid changes can affect other devices connected to the power grid (especially optical radiation devices) or the high-power electrical equipment itself, impacting the user experience. To address this issue, this application provides a control method (shown in Figure 3), an electrical device (shown in Figure 1), and a storage medium 200 (shown in Figure 11). It should be noted that the control method in each embodiment of this application can utilize any device with high-power components and switches, such as various drying devices 100, heating devices, refrigeration devices, hair styling tools, welding machines, optical radiation devices, large motors, beauty equipment, medical instruments, and other high-power devices. Heating equipment refers to equipment primarily used for heating, such as electric heaters, induction cookers, ceramic cookers, electric water heaters, heating rods, and induction furnaces. Refrigeration equipment refers to equipment used for cooling, which often also has a high-power compressor motor, such as air conditioners (air conditioners with both heating and cooling functions can also be considered heating equipment), refrigerators, and freezers. Hair styling equipment includes curling irons, straighteners, perming machines, and hair dyeing machines. Light radiation equipment includes high-power incandescent lamps, light boxes / light walls composed of multiple lamps, infrared lamps, and ultraviolet lamps. The following explanation primarily uses drying equipment 100 as an example. Drying equipment 100 includes, but is not limited to, hair dryers and tumble dryers. Its main function is to promote the evaporation of moisture from the target object, but whether a drying process actually occurs should not be used as a limitation on drying equipment 100.

[0029] Referring to Figures 1(a) and 2, the drying apparatus 100 according to this embodiment includes a housing 10, at least one power load unit, at least one switch 23, a zero-crossing detection circuit 40, and a controller 50. The power load unit is disposed in the housing 10. Each switch 23 is electrically connected to a power load unit. When a switch 23 is turned on, current flows through the switch 23 to the corresponding power load unit to power the unit. The zero-crossing detection circuit 40 generates a zero-crossing signal based on the alternating current. The controller 50 is electrically connected to at least each switch 23. It should be noted that in some embodiments, the power load unit includes, but is not limited to, a heater 21, a radiation source 30, a high-power motor, a compressor (air conditioner), a magnetron (microwave oven), etc.

[0030] The housing 10 is a structure within the drying equipment 100 used to house and protect functional devices (including but not limited to the heater 21, the switch 23, and the radiation source 30). The housing 10 can be made of metallic and / or non-metallic materials, where metallic materials include, but are not limited to, aluminum, iron, steel, or aluminum alloys, and non-metallic materials include, but are not limited to, plastics. In one example, the housing 10 can be made of both metallic and non-metallic materials, thereby increasing the structural strength of the housing 10 and reducing the likelihood of impact damage. In another example, the housing 10 can be made of non-metallic materials, such as plastic, thereby reducing its weight and contributing to the portability of the drying equipment 100.

[0031] Referring to Figure 1(b), in some embodiments, at least one power load unit includes at least one heater 21 and / or at least one radiation source 30, wherein the heater 21 is used to generate heat and the radiation source 30 is used to radiate light.

[0032] The heating element 21 can be a resistance wire or ceramic, etc. The resistance wire can be made of materials such as nickel-chromium alloy, iron-chromium-aluminum alloy, stainless steel, or titanium alloy. In some embodiments of this application, the heating element 21 includes one; or, the heating element 21 includes at least two. When the heating element 21 includes at least two, the at least two heating elements 21 can be connected in series, connected in parallel, or partially connected in series and partially connected in parallel. Specifically, whether the at least two heating elements 21 are connected in series or in parallel should be determined according to the specific circumstances of the drying equipment 100.

[0033] Furthermore, in some embodiments, each heater 21 has the same heating power. That is, when there are at least two heaters 21, the full-load power of at least two heaters 21 is the same, for example, the full-load power of at least two heaters 21 is 1000W, which facilitates the installation and replacement of heaters 21.

[0034] In other embodiments, each heater 21 has a different heating power. That is, when there are two heaters 21, the full-load power of at least two heaters 21 is different. For example, when there are three heaters 21, one heater 21 has a full-load power of 1000W, and the other two heaters 21 have a full-load power of 500W. In this way, when at least two heaters 21 are combined and operated, the drying equipment 100 can generate multiple output powers, thereby improving the applicability of the drying equipment 100 and meeting the user's needs.

[0035] Radiation source 30 is a structure in drying equipment 100 capable of radiating light within a preset frequency band. Radiation source 30 can be a halogen lamp, LED lamp, or other structure capable of generating ultraviolet, infrared, or visible light radiation. In some embodiments of this application, multiple radiation sources 30 include multiple halogen lamps and / or multiple light-emitting diodes. It should be noted that when the drying equipment 100 is a blower, the radiation source 30 can provide a certain degree of heating and drying. Where at least two radiation sources 30 are included, the at least two radiation sources 30 can be connected in series, connected in parallel, or partially connected in series and partially connected in parallel. Specifically, whether the at least two radiation sources 30 are connected in series or in parallel depends on the specific circumstances of the drying equipment 100.

[0036] In some embodiments, at least one power load unit includes a heater 21 and a radiation source 30, wherein the heater 21 and the radiation source 30 are connected in parallel, so that the heater 21 and the radiation source 30 each have relatively independent power supply and control circuits. In other words, in the drying equipment 100, the heater 21 and the radiation source 30 can be controlled and powered separately. Of course, in other examples, the heater 21 and the radiation source 30 can also be connected in series.

[0037] In other embodiments, at least one power load unit includes at least two heaters 21, which may be connected in series, in parallel, or partially connected in series and partially connected in parallel. In one example, at least one power load unit also includes a radiation source 30. Wherein, when at least two heaters 21 are connected in series, the radiation source 30 may be connected in series with the at least two heaters 21; or, the radiation source 30 may be connected in parallel with the entire assembly formed by the series connection of the at least two heaters 21; where at least two heaters 21 are connected in parallel, the radiation source may be connected in parallel with the at least two heaters 21; or, the radiation source 30 may be connected in series with one of the at least two heaters 21.

[0038] In some other embodiments, at least one power load unit includes at least two radiation sources 30, which may be connected in series, in parallel, or partially connected in series and partially connected in parallel. In one example, at least one power load unit also includes a heater 21. Where the at least two radiation sources 30 are connected in series, the heater 21 may be connected in series with the at least two radiation sources 30; or, the heater 21 may be connected in parallel with the entire assembly formed by the series connection of the at least two radiation sources 30; where the at least two radiation sources 30 are connected in parallel, the radiation sources may be connected in parallel with the at least two radiation sources 30; or, the heater 21 may be connected in series with one of the at least two radiation sources 30.

[0039] In some other embodiments, at least one power load unit includes at least two heaters 21 and at least two radiation sources 30. The at least two heaters 21 can be connected in series or in parallel. The at least two radiation sources 30 can be connected in series or in parallel. The at least two heaters 21 and the at least two radiation sources 30 can be connected together in series, in parallel, or in a combination of series and parallel.

[0040] For example, both the heater 21 and the radiation source 30 include two units. In one example, the two heaters 21 are connected in parallel, and the two radiation sources 30 are also connected in parallel and in parallel with the two heaters 21. In another example, the two heaters 21 are connected in parallel, and the two radiation sources 30 are connected in series and in series with one of the two heaters 21; or the two radiation sources are connected in series and in parallel with the two heaters 21.

[0041] It is understood that the number and connection method of the heater 21 and the radiation source 30 in the above embodiments are only illustrative examples. In other embodiments, the number and connection method of the heater 21 and the radiation source 30 may also include other forms, which will not be illustrated here.

[0042] For ease of explanation, in the following embodiments, when at least two heaters 21 are included, the at least two heaters 21 are connected in parallel. Each parallel branch includes one heater 21. Furthermore, the radiation source 30 is connected in parallel with the heaters 12, so that the radiation source 30 and the heaters 21 each have relatively independent power supply and control circuits. In other words, in the drying equipment 100, the radiation source 30 and the heaters 21 can be individually controlled and powered separately.

[0043] The switch 23 is a structure in the drying equipment 100 used to control the AC power signal to be turned on or off according to a control signal. In some embodiments of this application, the switch 23 may be a silicon controlled rectifier (SCR) or a MOSFET, etc. Specifically, the switch 23 may be connected in series with the corresponding heater 21. When the switch 23 receives a control signal, the switch 23 may switch from a blocking state to a conducting state. In this case, current flows through the switch 23 to the corresponding heater 21 to generate heat. The switch 23 may be electrically connected to the corresponding radiation source 30. When the switch 23 receives a control signal, the switch 23 may switch from a blocking state to a conducting state. At this time, the current output by the power supply 300 can flow to the radiation source 30 to make the radiation source 30 radiate light of a preset frequency band. It is understood that in other embodiments, the radiation source 30 may also be directly electrically connected to the power supply 300. The current output by the power supply 300 can flow directly to the radiation source 30, so that the radiation source 30 radiates light of a preset frequency band.

[0044] In one example, the quantity relationship between the switch 23 and the heater 21 can be one-to-one, that is, one switch 23 corresponds to one heater 21. It is understood that in some embodiments, the interconnected switches 23 and heaters 21 together constitute the power load module 20 of the drying equipment 100. The power load module 20 includes at least two modules, and at least two power load modules 20 are connected in parallel.

[0045] It is understood that in this application, the current flowing to the heater 21 is alternating current (AC). Alternating current is a type of current whose voltage direction changes periodically with time. Specifically, in some embodiments of this application, the frequency of the AC current can be 50 Hz or 60 Hz.

[0046] The zero-crossing detection circuit 40 is a circuit structure in the drying equipment 100 used to generate a zero-crossing signal based on the zero-crossing time of the AC signal; the controller 50 is a structure in the drying equipment 100 used for data processing. The controller 50 may include, but is not limited to, a microcontroller unit (MCU). In some embodiments of this application, when the zero-crossing detection circuit 40 generates a zero-crossing signal based on the zero-crossing time of the AC signal, the zero-crossing detection circuit 40 can send the zero-crossing signal to the controller 50. The controller 50 can generate a control signal synchronized with the AC signal based on the zero-crossing signal and transmit the control signal to the switch 23 to control the operation of the switch 23. It is understood that when there are multiple switches 23, the controller 50 can individually control the on / off state of a single switch 23 to achieve individual control of multiple power load units. It should be noted that in some embodiments, the zero-crossing signal refers to the signal when the AC signal waveform passes through zero (i.e., the positive-to-negative transition point).

[0047] Furthermore, in some embodiments, the drying equipment 100 further includes a rectifier circuit 80, which is connected between the controller 50 and the power supply 300. The rectifier circuit 80 receives the AC signal from the power supply 300 and outputs a DC signal to the controller 50 to power the controller 50.

[0048] Specifically, in some embodiments, the rectifier circuit 80 can rectify the periodically changing AC signal output by the power supply 300, thereby converting the AC signal into a DC signal, which can be used to power the controller 50.

[0049] Furthermore, in some embodiments, a voltage divider circuit 90 may be connected between the rectifier circuit 80 and the controller 50. The voltage divider circuit 90 can divide the DC signal output by the rectifier circuit 80, thereby outputting the divided DC signal to the controller 50 to supply power to the controller 50.

[0050] It should be noted that the following description mainly uses the power load unit as the heating element 21 as an example. The heating element 21 is used to generate heat. That is, the main function of the heating element 21 is to generate heat to promote the evaporation of moisture from the target object.

[0051] Please refer to Figures 2 to 4, which illustrate a control method provided in this application. The control method includes:

[0052] 01: Obtain each complete cycle N of the AC current based on the zero-crossing signal. Each complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions; and

[0053] 03: Control the on / off state of the switch 23 within a preset time period, and the switch 23 shall be disconnected at least once in each complete cycle N.

[0054] The above control method can be applied to drying equipment 100, which includes a switch 23 and a heater 21. The switch 23 is electrically connected to the heater 21. When the switch 23 is on, current flows through the switch 23 to the heater 21 to power the heater 21. It is understood that the drying equipment 100 in this embodiment is exactly the same as the drying equipment 100 in the above embodiments, and will not be described again here. The controller 50 is also used to execute the control methods in 01 and 03. That is, the controller 50 is also used to: obtain each complete cycle N of the AC current according to the zero-crossing signal, where each complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions; and control the on / off state of the switch 23 within a preset time, wherein the switch 23 is disconnected at least once in each complete cycle N. It should be noted that the positive cycle n1 and the negative cycle n2 only refer to the opposite voltage directions, not an absolute positive-negative relationship.

[0055] The preset time can be the complete usage time of the drying equipment 100, that is, the entire process from the user turning it on to the user turning it off. The preset time can also be a portion of the usage time of the drying equipment 100, such as 50% of the usage time. The preset time can also correspond to the user's control of the drying equipment 100; for example, after adjusting to a certain setting, the usage time within that setting is the preset time. The preset time can also correspond to a defined time length within which the aforementioned control method is executed. During the use of the drying equipment 100, the control method is executed once or multiple times as needed, and the duration of each execution is the preset time.

[0056] Specifically, in some embodiments, when the drying equipment 100 is started, the controller 50 can acquire the zero-crossing signal output by the zero-crossing detection circuit 40, and acquire each complete cycle N of the AC current based on the zero-crossing signal. The complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions. Within a preset time, the controller 50 controls the on / off state of the switch 23, ensuring that the switch 23 is disconnected at least once within each complete cycle N. That is, within the preset time, the controller 50 can control the switch 23 to disconnect at least once within each complete cycle N.

[0057] Referring to Figure 4, in one example, the controller 50 can control the circuit breaker 23 to open once within each complete cycle N. In this case, the controller 50 can control the circuit breaker 23 to open within the positive cycle n1 and close within the negative cycle n2; or, the controller 50 can control the circuit breaker 23 to open within the negative cycle n2 and close within the positive cycle n1. Referring to Figure 6, in another example, the controller 50 can control the circuit breaker 23 to open twice within each complete cycle N. In this case, the controller 50 can control the circuit breaker 23 to open within both the positive cycle n1 and the negative cycle n2.

[0058] Optionally, the drying device 100 may include a button, which starts when the user presses the button, and the controller 50 is able to acquire a zero-crossing signal and acquire each complete cycle N of the AC current based on the zero-crossing signal.

[0059] Optionally, when the AC frequency is 50Hz, each complete cycle N is 20ms, and each complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions; when the AC frequency is 60Hz, each complete cycle N is approximately 17ms, and each complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions.

[0060] During the use of the drying equipment 100, when controlled by the on / off switch 23, rapid changes in the power grid load may occur, leading to voltage fluctuations. Other electrical devices within the same power grid will be affected by these voltage fluctuations. Among these devices, the most common and easily perceived by users are light radiation devices, such as the radiation source 30 in some embodiments of this application, or various indoor lighting fixtures. The following description of this application mainly focuses on light radiation devices, but it should be noted that other electrical devices may also be affected.

[0061] The light radiation device continuously emits light during use. Incandescent or halogen lamps directly convert electrical energy into light and can be considered flicker-free, with a flicker frequency of 0Hz. When the switch 23 switches on and off, it causes a voltage fluctuation in the power grid, resulting in a corresponding change in brightness in the light radiation device—that is, a flicker. The human eye is most sensitive to flicker in the 10Hz-30Hz frequency range. When the flicker frequency of the light emitted by the device is within this range, the user can clearly perceive the flicker, causing discomfort. When the flicker frequency is outside this range, the user is unlikely to perceive it.

[0062] In several embodiments of this application, the controller 50 controls the switch 23 to disconnect at least once within each complete cycle N of a preset time period, thereby ensuring that the flicker frequency of the light radiation device is at least the same as, or greater than, the frequency of the alternating current. That is, when the electrical equipment used by the user employs the control method of this application, even if the light radiation device flickers, its flicker frequency is greater than or equal to the frequency of the alternating current (50Hz or 60Hz), thus ensuring that the flickering light does not affect the user. When using the drying device 100 in some embodiments of this application, the user will not feel the flickering of the room lights or the flickering of the light emitted by the radiation source 30, thereby improving the user experience.

[0063] Furthermore, in different embodiments of this application, the drying device 100 is not limited to having a radiation source 30. When the drying device 100 does not have a radiation source 30, its use may still affect the light emitted by other light radiation devices. The above-described control method ensures that the flicker frequency of the light emitted by the affected light radiation devices is outside the sensitive range of the human eye. When the drying device 100 has a radiation source 30, the above-described control method not only ensures that the flicker frequency of the light emitted by other light radiation devices is outside the sensitive range of the human eye, but also ensures that the flicker frequency of the radiation source 30 itself is outside the sensitive range of the human eye. In particular, in some embodiments, the radiation source 30 is a halogen lamp, whose heating principle is that the filament heats up after being energized and enters an incandescent state, directly heating the target object through thermal radiation. If the radiation source 30 flickers at a low frequency, in addition to causing discomfort to the human eye, it will also cause the filament to be unable to maintain a stable temperature, causing changes in the peak of the radiation spectrum, resulting in a deviation from the preset radiation band, and ultimately affecting the heating effect on the target object. By adopting the above-described embodiments, this situation can be avoided, ensuring that the radiation source 30 always has a better heating effect.

[0064] Please refer to Figures 2, 4, and 5. In some embodiments, 03: the switch 23 disconnects at least once in each complete cycle N, including:

[0065] 031: Within each complete cycle N, the switch 23 is disconnected within the negative cycle n2.

[0066] The controller 50 is also used to execute the control method in 031. That is, the controller 50 is also used to: disconnect the switch 23 in the negative cycle n2 within each complete cycle N.

[0067] The start and end times of the negative cycle n2 can be determined by the zero-crossing point. In some embodiments of this application, the start and end times of the negative cycle n2 within each complete cycle N are determined by detecting the zero-crossing point. The switch 23 is disconnected at the beginning of the negative cycle n2 and turned on at the end of the negative cycle n2. Since the zero-crossing point is an inherent characteristic of alternating current, control based on the zero-crossing point can ensure the accuracy of the on / off timing and duration, thereby precisely controlling the power.

[0068] Furthermore, as can be seen from the foregoing, when the negative cycle n2 is disconnected within each complete cycle N, it is equivalent to each complete cycle N corresponding to one flicker of the light from the optical radiation device. Therefore, the flicker frequency is the same as the frequency of the alternating current itself, that is, 50Hz or 60Hz, which is outside the sensitive range of the human eye.

[0069] It should be noted that there is no essential difference between the negative period n2 and the positive period n1; positive and negative simply refer to the opposite voltage directions. Therefore, the essence of the above is that within a complete alternating current cycle N, for two half-cycles with opposite voltages, one of them is disconnected. Thus, the above can also be expressed as: within each complete cycle N, the circuit breaker 23 is disconnected during the positive period n1.

[0070] If the preset time period includes a non-integer multiple of a complete AC cycle N, the voltage will change when the preset time is reached and the controller 50 directly controls the switch 23 to open. Therefore, when adjusting the operating power of the heater 21, the voltage on the grid side will fluctuate, affecting the normal operation of equipment connected to the grid. For example, if the preset time period includes one complete cycle N and one incomplete cycle N, where the incomplete cycle N includes a positive cycle n1 and half a negative cycle n2, then when the preset time is reached and the controller 50 directly controls the switch 23 to open, the voltage of the positive cycle n1 within two adjacent complete cycles N will not change, while the voltage of the negative cycle n2 within two adjacent complete cycles N will change once. Thus, when adjusting the operating power of the heater 21, the voltage on the grid side will fluctuate, affecting the normal operation of equipment connected to the grid. For example, voltage fluctuations on the grid side will cause the radiation source 30 to flicker.

[0071] Therefore, in some embodiments of this application, the preset time includes an integer multiple of the complete AC cycle N. Thus, when the switch 23 is open during the negative cycle n2 within each complete cycle N, the voltage will not change between two adjacent complete cycles N. Furthermore, when adjusting the operating power of the heater 21, the grid voltage will not fluctuate. This prevents voltage fluctuations from affecting other devices connected to the grid (e.g., radiation source 30), thereby ensuring the normal operation of devices connected to the grid, reducing the possibility of equipment failure, and extending the service life of the equipment.

[0072] Please refer to Figure 2, and in conjunction with Figures 4, 6, and 7, for another control method provided by an embodiment of this application. The control method includes:

[0073] 05: Within a preset time, control each power load module 20 to be in at least one of the following three operating states, and / or control each power load module 20 to switch between any two of the following three operating states: First state (as shown in Figure 6), the switch 23 remains open; Second state (as shown in Figure 7), the switch 23 remains on; Third state 50% (as shown in Figure 4), based on the zero-crossing signal, obtain each complete cycle N of the AC power, and the switch 23 is opened at least once in each complete cycle N.

[0074] The above control method can be applied to a drying device 100, which includes at least two parallel power load modules 20. Each power load module 20 includes a switch 23 and a heater 21 connected to each other. When the switch 23 is on, current flows through the switch 23 to the heater 21 to power the heater 21. It is understood that the drying device 100 in this embodiment is exactly the same as the drying device 100 in the above embodiments, and will not be described again here. The controller 50 is also used to execute the control method in 05. That is, the controller 50 is also used to: control each power load module 20 to be in at least one of the following three operating states within a preset time, and / or control each power load module 20 to switch between any two of the following three operating states: first state, the switch 23 remains off; second state, the switch 23 remains on; third state, the complete cycle N of the AC power is obtained according to the zero-crossing signal, and the switch 23 is off at least once in each complete cycle N.

[0075] It should be noted that the specific steps of the control method in this embodiment, namely "in the third state of 50%, the complete cycles N of the AC power are obtained according to the zero-crossing signal, and the switch 23 is disconnected at least once in each complete cycle N", are roughly the same as the specific steps of the control method in the above embodiment, and will not be described again here.

[0076] As described above, no switching occurs in the first and second states, thus preventing voltage fluctuations. In the third state, the frequency of the voltage fluctuation is the same as the frequency of the alternating current itself, ensuring that the flickering frequency caused by the light radiation device (and, in some embodiments, the radiation source 30) remains outside the range sensitive to human vision. Therefore, when the drying device 100 has multiple power load modules 20, ensuring that each power load module 20 operates in one of the three states, or switches between two, guarantees that the flickering frequency caused by the drying device 100 during use remains outside the range sensitive to human vision, thus ensuring a superior user experience.

[0077] Specifically, in some embodiments, the controller 50 can control the operating state of each power load module 20 to be at least 50% of the first state, second state, and third state within a preset time. It should be noted that in some embodiments, the operating states of each power load module 20 may be the same or different. For example, when there are two power load modules 20, the controller 50 can control both power load modules 20 to operate in the third state within the preset time; or, within the preset time, the controller 50 can control one power load module 20 to operate in the first state and the other power load module 20 to operate in the third state.

[0078] In other embodiments, the controller 50 can control the operating state of each power load module 20 to switch between any two of the first, second, and third states within a preset time. It should be noted that in some embodiments, the switching methods for the operating states of each power load module 20 may be the same or different. For example, when there are two power load modules 20, the controller 50 can control both power load modules 20 to switch between the first and third states within a preset time; or, within a preset time, the controller 50 can control one power load module 20 to switch between the first and second states, and the other power load module 20 to switch between the first and third states.

[0079] In summary, at least two power load modules 20 are connected in parallel, and within a preset time, the controller 50 can control the operating state of each power load module 20 to at least one of the first, second, and third states at 50%; and / or, within a preset time, the controller 50 can control the operating state of each power load module 20 to switch between any two of the first, second, and third states. Therefore, the controller 50 can independently control at least two power load modules 20, enabling the at least two power load modules 20 to combine and output various different power outputs. This allows the drying equipment 100 to be suitable for different usage scenarios and needs, improving the user experience. Furthermore, the parallel connection of at least two power load modules 20 can prevent a short circuit or other fault in one power load module 20 from affecting other power load modules 20, thereby improving the stability and reliability of the drying equipment 100.

[0080] Referring to Figure 2, and in conjunction with Figures 4, 6, and 7, in some embodiments, when each power load module 20 operates in one of the first, second, or third states, at least two power load modules 20 jointly output a preset power. Depending on the different operating states of each power load module 20, the drying device 100 has multiple preset power values ​​of varying magnitudes. As mentioned earlier, for any given preset power value, it essentially corresponds to each of the multiple power load modules 20 operating in one of the first, second, or third states, resulting in a light flicker frequency outside the sensitive range of the human eye. It can also be understood that when each power load module 20 operates in one of the first, second, or third states, at least two power load modules 20 can combine to output multiple preset power values ​​of varying magnitudes. This allows the drying equipment 100 to have multiple speed settings (working modes), making it suitable for different usage scenarios and needs, and ensuring that the light flicker frequency that may be caused by these speed settings is outside the sensitive range of the human eye, thereby improving the user experience. On the other hand, it can prevent the short circuit or other faults of one power load module 20 from affecting other power load modules 20, thereby improving the stability and reliability of the drying equipment 100. Furthermore, compared to having only one power load module 20, the setting of at least two power load modules 20 can prevent a single power load module 20 from being damaged due to prolonged high-load operation, thereby reducing the possibility of damage to the power load module 20 and extending its service life.

[0081] Specifically, in some embodiments, the power load module 20 operates in a first state, that is, the controller 50 controls the switch 23 to remain in the open state for a preset time, at which time the output power of the power load module 20 is 0; the power load module 20 operates in a second state, that is, the controller 50 controls the switch 23 to remain in the closed state for a preset time, at which time the output power of the power load module 20 is the full load power of the power load unit; the power load module 20 operates in a third state, that is, each complete cycle N of the AC power is obtained according to the zero-crossing signal, the complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions; and the controller 50 controls the on / off state of the switch 23 corresponding to the power load module 20 for a preset time, the switch 23 is disconnected at least once in each complete cycle N, at which time the output power of the power load module 20 is 50% of the full load power of the power load unit.

[0082] For example, when the power load module 20 includes two modules, and the full-load power of the power load units in both power load modules 20 is 1000W, the drying equipment 100 may include five different preset power values ​​depending on the different operating states of the power load modules 20. Specifically, when both power load modules 20 are in the first operating state, the preset power is 0W; when one power load module 20 is in the first operating state and the other power load module 20 is in the third operating state, the preset power is 500W; when one power load module 20 is in the first operating state and the other power load module 20 is in the second operating state, the preset power is 1000W; when one power load module 20 is in the second operating state and the other power load module 20 is in the third operating state, the preset power is 1500W; and when both power load modules 20 are in the first operating state, the preset power is 2000W. That is, the five preset power values ​​of the drying equipment 100 are 0W, 500W, 1000W, 1500W and 2000W respectively.

[0083] As can be seen from the above, in this embodiment, during the process of adjusting multiple preset power settings of the drying equipment 100, other equipment connected to the power grid (such as radiation source 30) can maintain normal operation, thereby reducing the impact of voltage fluctuations on the equipment connected to the power grid.

[0084] In some embodiments, the drying equipment 100 has multiple operating modes, each corresponding to a preset power.

[0085] Specifically, in some implementations, multiple operating modes may have different design purposes, and each operating mode corresponds to a different preset power. For example, taking a hair dryer as an example, the drying device 100 may have five defined operating modes based on drying speed: cool air, medium-low heat, medium heat, medium-high heat, and high heat; or it may have five defined operating modes based on drying time: low speed, medium-low speed, medium speed, medium-high speed, and high speed. After the user turns on the drying device 100, the user can select different operating modes according to specific usage needs. It is understood that when the power load module 20 includes two modules, and the full-load power of the heater 21 in both power load modules 20 is 1000W, the low speed, medium-low speed, medium speed, medium-high speed, and high speed modes can correspond to 0W, 500W, 1000W, 1500W, and 2000W respectively.

[0086] Furthermore, referring to Figure 1, in some embodiments, the drying equipment 100 further includes a gear selection structure 60, which is disposed in the housing 10 and used to select one of multiple operating modes in response to user operation. It should be noted that in some embodiments, the gear selection structure 60 may include, but is not limited to, a knob, button, slide switch, touch screen, etc. When the drying equipment 100 is started, the user can operate the gear selection structure 60 to adjust the operating mode.

[0087] In general, shorter drying times during blow-drying indicate faster hair moisture loss, making it more susceptible to excessive water loss and high-temperature damage. Based on different hair types and usage habits, different users tend to choose different drying times when using a hair dryer. For example, users with short hair or less sensitive hair tend to dry quickly to save time, opting for the shortest drying time. Conversely, users with medium to long hair or highly sensitive hair tend to dry more slowly, choosing a longer drying time.

[0088] In some of the aforementioned embodiments, the drying device 100 provides multiple preset operating modes corresponding to different blow-drying speeds for different users to select. In other embodiments, users can continuously adjust the blow-drying speed according to specific usage needs. This further optimizes the user experience, meets more personalized user needs, and enhances the user experience.

[0089] Furthermore, in some embodiments, the drying device 100 also includes a stepless adjustment structure 70, which is used to respond to the user's stepless adjustment of the selected target power. It should be noted that in some embodiments, the target power may be greater than or equal to the minimum preset power and less than or equal to the maximum preset power. For example, if the power load module 20 includes two modules, and the full-load power of the heater 21 in both power load modules 20 is 1000W, the target power is greater than or equal to 0 and less than or equal to 2000W.

[0090] Optionally, the stepless adjustment structure 70 includes a knob disposed in the housing 10, responding to user rotation; and / or, the stepless adjustment structure 70 includes a touchscreen disposed in the housing 10, responding to user touch. When the drying equipment 100 is started, the user can operate the knob and / or the touchscreen to adjust the operating mode. In some embodiments not shown, the drying equipment 100 can also be connected to an external smart terminal, allowing the user to operate the drying equipment 100 and adjust the operating mode via the smart terminal.

[0091] Please refer to Figures 2 and 8. In some embodiments, the control method further includes:

[0092] 061: Determine the working mode selected by the user;

[0093] 063: Control the operating status of each power load module 20 to achieve the corresponding preset power.

[0094] The controller 50 is also used to execute the control methods in 061 and 063. That is, the controller 50 is also used to: determine the operating mode selected by the user; and control the operating state of each power load module 20 to achieve the corresponding preset power.

[0095] Specifically, in some embodiments, the controller 50 can determine the user-selected operating mode through the gear selection structure 60 and / or the stepless adjustment structure 70, and control the operating state of the power load module 20 according to the operating mode to achieve the corresponding preset power. For example, when there are two power load modules 20, and the full-load power of the heater 21 in both power load modules 20 is 1000W, if it is determined that the user-selected operating mode is medium speed, the controller 50 can control the operating state of one power load module 20 to the first state and the operating state of the other power load module 20 to the second state to achieve the corresponding preset power (1000W).

[0096] Please refer to Figures 2 and 9. In some embodiments, the control method further includes:

[0097] 071: Determine the target power selected by the user using the stepless adjustment method;

[0098] 073: Obtain the two preset powers that are closest to the target power and record them as the first preset power and the second preset power;

[0099] 075: Control the operating status of each power load module 20, first output the first preset power in the first time period, and then output the second preset power in the second time period. The sum of the duration of the first time and the second time period is equal to the duration of the preset time, and the sum of the product of the first time and the first preset power and the product of the second time and the second preset duration is equal to the product of the preset time and the target power.

[0100] The controller 50 is also used to execute the control methods in 071, 073, and 075. That is, the controller 50 is also used to: determine the target power selected by the user in a stepless adjustment mode; acquire the two preset power closest to the target power and record them as the first preset power and the second preset power; control the operating state of each power load module 20, first outputting the first preset power in a first time period, and then outputting the second preset power in a second time period, wherein the sum of the duration of the first time period and the second time period is equal to the duration of the preset time, and the sum of the product of the first time period and the first preset power and the product of the second time period and the second preset duration is equal to the product of the preset time and the target power.

[0101] Specifically, in some embodiments, the controller 50 can determine the target power selected by the user in a stepless adjustment manner through the stepless adjustment structure 70, obtain the two preset power values ​​closest to the target power, and control the operating state of each power load module 20. First, it outputs the first preset power within a first time period, and then outputs the second preset power within a second time period, so that the sum of the product of the first time and the first preset power, and the product of the second time and the second preset duration, equals the product of the preset time and the target power. The values ​​of the first time and the second time can be obtained by combining the sum of the durations of the first time and the second time with the duration of the preset time. This allows the total output power of the drying equipment 100 within the preset time period to be the target power, thereby approximately achieving stepless adjustment. This enables the drying equipment 100 to output any power, effectively meeting the user's needs and improving the user experience. Based on the foregoing, it can be seen that after the user selects any power for the drying equipment 100 through stepless adjustment, during the operation of the drying equipment 100, each power load module 20 essentially still operates or switches within the aforementioned preset power. Thus, under the premise that the drying equipment 100 can output any target power as needed, it still has the aforementioned technical effect of "the light flicker frequency being outside the sensitive range of the human eye". The relevant content will not be repeated.

[0102] It is easy to understand that the above content corresponds to the situation where the target power selected by the user during the stepless adjustment of the drying equipment 100 is different from any preset power. If the user selects the target power of the drying equipment 100 in the stepless adjustment method and it happens to be the same as a preset power, then there is no need to perform the steps about the first preset power and the second preset power mentioned above or below; the output can be directly based on the preset power. For example, if there are two power load modules 20, and the full-load power of the heaters 21 in both power load modules 20 is 1000W, then the five different preset power values ​​of the drying equipment 100 are 0W, 500W, 1000W, 1500W, and 2000W. In this case, if the controller 50 determines that the target power selected by the user in the stepless adjustment method is 1250W, then the two preset power values ​​closest to the target power are 1000W and 1500W. Thus, the controller 50 can control the operating state of each power load module 20, outputting 1000W in the first time period and then 1500W in the second time period. The sum of the durations of the first and second times equals the duration of the preset time, i.e., first time * 1000 + second time * 1500 = T * 1250, which gives the values ​​of the first and second times. One solution in this example is: the first time equals the second time, meaning that within the preset time, 1000w is output for 50% of the preset time duration; and 1500w is output for the other 50% of the preset time duration.

[0103] In some embodiments, the controller 50 can individually control the operating state of each power load module 20, first outputting a first preset power within a first time period, and then outputting a second preset power within a second time period, so that the sum of the product of the first time and the first preset power and the product of the second time and the second preset duration is equal to the product of the preset time and the target power. Specifically, the controller 50 can control at least one power load module 20 to output the first preset power within a first time period, and control at least another power load module 20 to output the second preset power within a second time period, thereby achieving the sum of the product of the first time and the first preset power and the product of the second time and the second preset duration being equal to the product of the preset time and the target power. For example, if the power load module 20 includes two modules, and the full-load power of the heater 21 in both power load modules 20 is 1000W, and the target power is 750W, the controller 50 obtains two preset powers closest to the target power: 500W and 1000W. In this case, the controller 50 can control one power load module 20 to output 500W in the first time period, at which time the operating state of this power load module 20 is the third state; then, it controls the other power load module 20 to output 1000W in the second time period, at which time the operating state of this power load module 20 is the second state. Thus, the sum of the product of the first time and the first preset power and the product of the second time and the second preset duration is equal to the product of the preset time and the target power, that is, the drying equipment 100 outputs the target power within the preset time T.

[0104] It should be noted that, in one example, when the controller 50 individually controls the operating state of each power load module 20 to ensure that the sum of the product of the first time and the first preset power, and the product of the second time and the second preset duration, equals the product of the preset time and the target power, the operating states of each power load module 20 are identical. In other words, all power load modules 20 operate in the same state during the first time period, and all power load modules 20 operate in the same state during the second time period. For example, during the first time period, the controller 50 controls all power load modules 20 to operate in the third state.

[0105] In another example, when the controller 50 individually controls the operating state of each power load module 20 to achieve a sum where the product of a first time and a first preset power and the product of a second time and a second preset duration equals the product of a preset time and a target power, the operating states of each power load module 20 will be different. For example, if the controller 50 controls at least one power load module 20 to operate in the second state, then the controller 50 will also control at least another power load module 20 to operate in the third state.

[0106] In other embodiments, the controller 50 can control the overall operating state of each power load module 20, first outputting a first preset power within a first time period, and then outputting a second preset power within a second time period, so that the sum of the product of the first time and the first preset power and the product of the second time and the second preset duration is equal to the product of the preset time and the target power. Specifically, the controller 50 can control each power load module 20 to jointly output the first preset power within a first time period, and control each power load module 20 to jointly output the second preset power within a second time period, thereby achieving the sum of the product of the first time and the first preset power and the product of the second time and the second preset duration being equal to the product of the preset time and the target power. For example, if the power load module 20 includes two modules, and the full-load power of the heater 21 in both power load modules 20 is 1000W, and the target power is 1250W, the controller 50 obtains two preset powers closest to the target power: 1000W and 1500W. In this case, the controller 50 can control the two power load modules 20 to output 1000W together in the first time period. At this time, the operating state of both power load modules 20 can be the third state, or one power load module 20 can be in the first state and the other power load module 20 can be in the second state. Then, the controller 50 can control each power load module 20 to output 1500W together in the second time period. At this time, one power load module 20 can be in the second state and the other power load module 20 can be in the third state. This ensures that the sum of the product of the first time and the first preset power, and the product of the second time and the second preset duration, equals the product of the preset time and the target power, i.e., the drying equipment 100 outputs the target power within the preset time period.

[0107] In summary, since the preset power output by each power load module 20 switches from the first preset power to the second preset power within a preset time, the power output in the first time and the second time are not the same. If the preset time is too long, users will easily perceive the temperature change; if the preset time is too short, the voltage will change too many times per minute, affecting the normal operation of other devices connected to the power grid (such as radiation source 30).

[0108] Therefore, in some embodiments of this application, taking an AC frequency of 50Hz as an example, the preset time can be 2.5 seconds (containing 125 complete cycles N), with the preset time cycling 24 times per minute. As can be seen from the above, within the preset time, the voltage fluctuations that may occur during the operation of the drying equipment 100 will not cause the light flicker frequency of the light radiation equipment to be within the range sensitive to the human eye, ensuring the normal operation of the radiation source 30 and other equipment connected to the power grid; on the other hand, it can reduce the possibility of users perceiving temperature changes and improve the user experience.

[0109] Please refer to Figures 2 and 9. In some other embodiments, the control method further includes:

[0110] 081: Determine the target power selected by the user using stepless adjustment;

[0111] 083: Control at least one power load module 20 to continuously output within a preset time period, and record its output power as the first output power;

[0112] 085: Control at least one other power load module 20 to continuously output within a first time period within a preset time period, and record its output power as the second output power. The duration of the first time period is less than the duration of the preset time period, and the sum of the product of the preset time period and the first output power period and the product of the first time period and the second output power period is equal to the product of the preset time period and the target power.

[0113] The controller 50 is also used to execute the control methods in 081, 083, and 085. That is, the controller 50 is also used to: determine the target power selected by the user in a stepless adjustment mode; control at least one power load module 20 to continuously output within a preset time, and record its output power as the first output power; control at least another power load module 20 to continuously output within a first time within a preset time, and record its output power as the second output power, wherein the duration of the first time is less than the duration of the preset time, and the sum of the product of the preset time and the first output power and the product of the first time and the second output power is equal to the product of the preset time and the target power.

[0114] Specifically, in some embodiments, the controller 50 can determine the target power selected by the user in a stepless adjustment manner through the stepless adjustment structure 70, and control at least one power load module 20 to continuously output power within a preset time, with its output power recorded as the first output power. Within the preset time, at least another power load module 20 is controlled to continuously output power within the first time period, with its output power recorded as the second output power. This ensures that the sum of the product of the preset time and the first output power, and the product of the first time and the second output power, equals the product of the preset time and the target power. In this embodiment, at least one power load module 20 maintains continuous output throughout the preset time, undertaking the first output power portion of the target power. The second output power is output by at least another power load module within the first time period, thereby achieving the target power. Alternatively, the preset time period can be understood as including two phases: at least two power load modules 20 operate simultaneously within the first time period, and only one power load module 20 operates within the (preset time - first time) period. This allows the drying equipment 100 to output the target power within a preset time, meaning that the drying equipment 100 can achieve stepless adjustment and output any power, thereby effectively meeting the user's needs and improving the user experience.

[0115] In some embodiments, the controller 50 can control each power load module 20 to operate in the same operating state. For example, the controller 50 can control each power load module 20 to operate in a third state. That is, the controller 50 controls at least one power load module 20 to continuously output in the third state for a preset time, and controls at least another power load module 20 to continuously output in the third state for a first time for a preset time. This enables stepless adjustment of the drying equipment 100. Furthermore, since the output power of each power load module 20 is the same, the power distribution is more uniform, preventing excessive voltage fluctuations.

[0116] In other embodiments, the controller 50 can control each power load module 20 to operate in different operating states. For example, the controller 50 can control at least one power load module 20 to continuously operate in one of a first state, a second state, and a third state, and control at least another power load module 20 to continuously operate in the other of the first, second, and third states; or, control at least another power load module 20 to arbitrarily switch between any two of the first, second, and third states. That is, the controller 50 controls at least one power load module 20 to continuously output in one of the first, second, and third states for a preset time, controls at least another power load module 20 to continuously operate in the other of the first, second, and third states for a first time for a preset time; or, controls at least another power load module 20 to arbitrarily switch between any two of the first, second, and third states for a first time for output for a preset time. Therefore, at least one other power load module 20 can adjust the total output power so that the total output power of each power load module 20 reaches the target power, thereby realizing stepless adjustment of the drying equipment 100.

[0117] For example, the controller 50 can control at least one power load module 20 to continuously output in a second state within a preset time period, and control at least another power load module 20 to output in a first state, a third state, or any two of the first state, second state, and third state within a first time period within a preset time period.

[0118] Please refer to Figure 2, and in conjunction with Figures 4, 6, and 7, in some embodiments, the control method further includes:

[0119] 09: Within a unit of time, the power load module 20 is in the first state for the first 50% of the time, and switches between the second state and the third state for the next 50% of the time. The preset time is an integer multiple of the unit of time.

[0120] The controller 50 is also used to execute the control method in 09. That is, the controller 50 is also used to: in the first 50% of the time within a unit duration, the power load module 20 is in the first state, and in the second 50% of the time, the power load module 20 switches between the second state and the third state, with the preset time being an integer multiple of the unit duration.

[0121] In particular, since the output power of the power load module 20 differs significantly between the second and third operating states, if the power load module 20 operates in the third state for a longer period of time, the average output power of the power load module 20 will decrease, that is, the heat generated by the heater 21 will decrease, and the air temperature of the drying equipment 100 will drop. If the operating state of the power load module 20 switches between the second and third states at a lower frequency (i.e., the number of times the second and third states are switched is less), the output power of the power load module 20 will vary greatly between the maximum power and the lower power, causing the air temperature to rise and fall rapidly in a short period of time, and the air temperature curve will show sawtooth fluctuations, which will make the user perceive the air temperature change and affect the user experience.

[0122] In some embodiments of this application, the controller 50 controls the power load module 20 to be in the first state for the first 50% of the time per unit time, and switches between the second state and the third state for the second 50% of the time. This can prevent the operating state of the power load module 20 from switching between the second state and the third state too infrequently, avoid the problem of air temperature drop and sawtooth fluctuations in the air temperature curve, and thus improve the user experience.

[0123] For example, the unit duration can be 5 seconds. Specifically, the controller 50 can control the power load module 20 to be in a first state for the first 2.5 seconds, and then switch between a second state and a third state for the next 2.5 seconds. Wherein, after the controller 50 determines the target power selected by the user in a stepless adjustment manner, the controller 50 can determine the switching frequency of the power load module 20 between the second and third states in the next 2.5 seconds of each unit duration based on the target power, and control the power load module 20 to operate continuously with the unit duration as the basic cycle unit.

[0124] Please refer to Figures 2 and 11. This application also provides a storage medium 200 on which a program 210 is stored. When the program 210 is executed by one or more controllers 50, it implements the control method of any of the embodiments described above.

[0125] For example, when program 210 is executed by controller 50, the following control method is implemented:

[0126] 01: Obtain each complete cycle N of the AC current based on the zero-crossing signal. Each complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions; and

[0127] 03: Control the on / off state of the switch 23 within a preset time period, ensuring that the switch 23 is disconnected at least once within each complete cycle N. For example, referring to Figures 4, 6, and 7, when program 210 is executed by controller 50, the following control method is implemented:

[0128] 05: Within a preset time, control each power load module 20 to be in at least one of the following three operating states, and / or control each power load module 20 to switch between any two of the following three operating states: First state, the switch 23 remains open; Second state, the switch 23 remains on; Third state 50%, based on the zero-crossing signal, obtain each complete cycle N of the AC power, and the switch 23 is opened at least once in each complete cycle N.

[0129] For example, when program 210 is executed by controller 50, it can also implement the control methods in 031, 061, 063, 071, 073, 075, 081, 083, 085, and 09.

[0130] It should be noted that the explanations of the control methods and electrical equipment in the foregoing embodiments also apply to the storage medium 200 in the embodiments of this application, and will not be elaborated here.

[0131] In the storage medium 200 of this application, the on / off state of the switch 23 is controlled within a preset time. The switch 23 is disconnected at least once in each complete cycle N. Thus, in this embodiment, the frequency of the change in the power grid load is greater than or equal to the frequency of the alternating current. At this time, the flicker frequency of the optical radiation device connected to the power grid (and the radiation source 30 in some embodiments) is also greater than or equal to the frequency of the alternating current. That is, the flicker frequency of the optical radiation device connected to the power grid due to the influence of the switch 23 is greater than or equal to 50Hz or 60Hz. Since the frequency range in which the human eye is most sensitive to flicker is 10Hz-30Hz, this embodiment can ensure that the flicker frequency of the optical radiation device is higher than the flicker sensitivity range of the human eye. In other words, the bright and dark flicker of the optical radiation device connected to the power grid will not affect the user, thereby improving the user experience.

[0132] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0133] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0134] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, a storage medium can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples of storage media (a non-exhaustive list) include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the storage medium could be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0135] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0136] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a storage medium, and when executed, it includes one or a combination of the steps of the method embodiments. Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc.

[0137] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method for electrical equipment, characterized in that, The electrical equipment includes a switch and a power load unit. The switch is electrically connected to the power load unit. When the switch is on, current flows through the switch to the power load unit to power the power load unit. The control method includes: The complete cycles of the alternating current are obtained based on the zero-crossing signal, wherein the complete cycle includes a positive cycle and a negative cycle with opposite voltage directions; and The on / off state of the switch is controlled within a preset time period, and the switch is disconnected at least once in each complete cycle.

2. The control method according to claim 1, characterized in that, The switch disconnects at least once in each complete cycle, including: During each complete cycle, the switch is disconnected during the negative cycle.

3. The control method according to claim 1, characterized in that, The preset time includes an integer multiple of the complete cycles of the alternating current.

4. A control method for electrical equipment, characterized in that, The electrical equipment includes at least two power load modules connected in parallel; each power load module includes an interconnected switch and a power load unit, wherein when the switch is on, current flows through the switch to the power load unit to power the power load unit; the control method includes: Within a preset time period, each power load module is controlled to operate in at least one of the following three operating states, and / or each power load module is controlled to switch between any two of the following three operating states: In the first state, the switch remains open; In the second state, the switch remains on; In the third state (50%), each complete cycle of the AC current is obtained based on the zero-crossing signal, and the switch is disconnected at least once in each complete cycle.

5. The control method according to claim 4, characterized in that, When each of the power load modules is operating in one of the first state, the second state, or the third state, at least two of the power load modules jointly output a preset power. Depending on the different operating states of each power load module, the electrical equipment has multiple preset power values ​​of different sizes.

6. The control method according to claim 5, characterized in that, The electrical equipment has multiple operating modes, each operating mode corresponding to a preset power; the control method further includes: Determine the working mode selected by the user; Control the operating state of each power load module to achieve the corresponding preset power.

7. The control method according to claim 6, characterized in that, Also includes: Determine the target power selected by the user using the stepless adjustment method; Obtain the two preset powers that are closest to the target power, and record them as the first preset power and the second preset power; Control the operating status of each power load module, first output a first preset power in a first time period, and then output a second preset power in a second time period. The sum of the duration of the first time and the second time period is equal to the duration of the preset time, and the sum of the product of the first time and the first preset power and the product of the second time and the second preset duration is equal to the product of the preset time and the target power.

8. The control method according to claim 6, characterized in that, Also includes: Determine the target power selected by the user using the stepless adjustment method; Within the preset time period, at least one of the power load modules is controlled to continuously output power, and its output power is recorded as the first output power. Within the preset time period, at least one of the power load modules is controlled to continuously output power during the first time period, and its output power is recorded. The second output power is defined as follows: the duration of the first time is less than the duration of the preset time, and the sum of the product of the preset time and the first output power and the product of the first time and the second output power is equal to the product of the preset time and the target power.

9. The control method according to claim 4, characterized in that, Also includes: Within a unit of time, the power load module is in the first state for the first 50% of the time, and the power load module switches between the second state and the third state for the next 50% of the time, and the preset time is an integer multiple of the unit of time.

10. An electrical device, characterized in that, include: case; At least one power load unit, said power load unit being disposed in the housing; At least one switch, each of the switches being electrically connected to one of the power load units, wherein when the switch is turned on, current flows through the switch to the corresponding power load unit to power the power load unit for operation; Zero-crossing detection circuit, the zero-crossing detection circuit being used to generate a zero-crossing signal based on the alternating current; and A controller, which is electrically connected to at least each of the on / off switches, is used to perform the control method according to any one of claims 1-9.

11. The electrical equipment according to claim 10, characterized in that, At least one of the power load units includes at least one heater and / or at least one radiation source, the heater being used to generate heat and the radiation source being used to radiate light.

12. The electrical equipment according to claim 10, characterized in that, In the case where the power load unit includes at least one radiation source, the plurality of radiation sources include a plurality of halogen lamps and / or a plurality of light-emitting diodes.

13. The electrical equipment according to claim 10, characterized in that, Also includes: A gear selection structure is disposed in the housing and is used to select one of multiple working modes in response to user operation; And / or, A stepless adjustment structure is provided, which is used to respond to the user's stepless adjustment to select a target power.

14. The electrical equipment according to claim 13, characterized in that, The stepless adjustment structure includes: A knob, disposed on the housing, responding to the user's rotational operation; and / or, A touchscreen, disposed on the housing, responds to the user's touch operation.

15. The electrical equipment according to claim 10, characterized in that, In the case where the power load unit includes at least one heater, each heater has the same heating power; or, each heater has a different heating power.

16. The electrical equipment according to claim 10, characterized in that, The electrical equipment also includes: A rectifier circuit is connected between the controller and the power supply. The rectifier circuit receives the AC signal from the power supply and outputs a DC signal to the controller to power the controller.

17. The electrical equipment according to claim 10, characterized in that, The electrical equipment is any one of the following: drying equipment, heating equipment, refrigeration equipment, hair styling tools, motor control equipment, and light radiation equipment.

18. A storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, it implements the control method according to any one of claims 1-9.

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