Control method, electrical equipment and storage medium

Abstract

A control method, an electrical device and a storage medium (200), the control method comprising: acquiring each complete cycle of an alternating current according to a zero-crossing signal, the complete cycle comprising a positive cycle and a negative cycle with opposite voltage directions; and controlling the on-off state of the on-off device (23) in a preset time, wherein the on-off device (23) is switched off at least once in each complete period.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and in particular to a control method, electrical equipment, and storage medium. Background Art

[0002] In the related art, high-power electrical equipment using alternating current, such as drying equipment (such as hair dryers, dryers, etc.), heating equipment, refrigeration equipment, hair styling appliances, beauty equipment, and medical instruments, includes a power load unit that can convert electrical energy into other energy. The way to control the power load unit is usually to control the duty cycle of the power load unit through a switch (such as a thyristor) to control the duty cycle of the power load unit, that is, the ratio of the on time to the total time. Assuming that 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 medium output power is required, the duty cycle is adjusted to 50%. At this time, the output power of the power load unit is 50%P max The essence of this control method is to cut off or turn on the power supply to the power load unit at high frequency. When the power supply to the power load unit is cut off, the load of the grid is 0, and when the power supply to the power load unit is turned on, the load of the grid is P max Since electrical equipment with power load units are high-power electrical equipment, high-frequency switching will cause the grid load to fluctuate between 0 and P. max When P max When the voltage fluctuation is large, the voltage fluctuation caused by this rapid change will affect other equipment connected to the power grid (especially optical radiation equipment) or the high-power electrical equipment itself, affecting the user experience. Summary of the Invention

[0003] Embodiments of the present application provide a control method, an electrical device, and a storage medium.

[0004] An embodiment of the present application provides a control method for an electrical device, the device comprising a switch and a power load unit. The switch is electrically connected to the power load unit, and when the switch is on, current flows through the switch to the power load unit to operate the power load unit. The control method includes: obtaining each complete cycle of alternating current based on a zero-crossing signal, wherein the complete cycle includes a positive cycle and a negative cycle with opposite voltage directions; and controlling the on / off state of the switch within a preset time, wherein the switch is opened at least once during each complete cycle.

[0005] Another control method provided in an embodiment of the present application is for use in an electrical device, the electrical device comprising at least two parallel power load modules; each of the power load modules comprises 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 operate the power load unit. The control method comprises: controlling each of the power load modules to be in at least one of the following three operating states within a preset time, and / or controlling each of the power load modules to switch between any two of the following three operating states: a first state in which the switch remains off; a second state in which the switch remains on; and a third state 50% in which each complete cycle of the alternating current is obtained based on a zero-crossing signal, with the switch being off at least once during each complete cycle.

[0006] An electrical device provided in an embodiment of the present 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 arranged in the housing. Each switch is electrically connected to a power load unit. When the switch is turned on, the current flows through the switch to the corresponding power load unit for the operation of the power load unit. The zero-crossing detection circuit is used to generate a zero-crossing signal based on the alternating current. The controller is electrically connected to at least each switch, and the controller is used to execute the control method of the embodiment of the present application. The control method includes: obtaining each complete cycle of the alternating current according to 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, the switch being disconnected at least once in each complete cycle.

[0007] Another electrical device provided in an embodiment of the present 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 a power load unit. When the switch is turned on, current flows through the switch to the corresponding power load unit to operate the power load unit. The zero-crossing detection circuit is used to generate a zero-crossing signal based on the alternating current. The controller is electrically connected to at least each switch, and the controller is used to execute the control method of the embodiment of the present 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, in which the switch remains disconnected; a second state, in which the switch remains on; and a third state 50%, in which each complete cycle of the alternating current is obtained based on the zero-crossing signal, and the switch is disconnected at least once in each complete cycle.

[0008] Embodiments of the present application provide a storage medium having a program stored thereon, which, when executed by a processor, implements a control method according to embodiments of the present application. The control method comprises: obtaining each complete cycle of alternating current based on a zero-crossing signal, wherein the complete cycle includes a positive cycle and a negative cycle with opposite voltage directions; and controlling the on / off state of a switch within a preset time, wherein the switch is opened at least once during each complete cycle.

[0009] Another storage medium provided in an embodiment of the present application stores a program thereon, and when the program is executed by a processor, implements a control method in an embodiment of the present application. The control method includes: controlling each of the power load modules to at least one of the following operating states within a preset time, and / or controlling each of the power load modules to switch between the following two operating states: a first state in which the switch remains off; a second state in which the switch remains on; and a third state 50% in which the switch is disconnected at least once during each complete cycle of the alternating current obtained based on a zero-crossing signal.

[0010] In the control method, electrical equipment, and storage medium of the embodiments of the present application, the on / off state of the switch is controlled within a preset time, and the switch is disconnected at least once during each complete cycle. Thus, in this embodiment, the frequency of change of the grid load is greater than or equal to the frequency of the alternating current. At this time, the flickering frequency of the optical radiation device connected to the grid is also greater than or equal to the frequency of the alternating current. That is, the flickering frequency of the optical radiation device connected to the grid due to the influence of the switch 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 flickering frequency of the optical radiation device is higher than the flicker sensitivity range of the human eye. That is, the bright and dark flickering of the optical radiation device connected to the grid will not affect the user, thereby improving the user experience.

[0011] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0013] FIG1( a ) is a schematic diagram of the structure of an electrical device according to some embodiments of the present application;

[0014] FIG1( b ) is a schematic structural diagram of electrical equipment according to other embodiments of the present application;

[0015] Figure 2is a schematic diagram of the connection between the power supply and the electrical device in certain embodiments of the present application;

[0016] Figure 3 is a flow chart of a control method according to certain embodiments of the present application;

[0017] Figure 4 It is a schematic diagram of the principle of the control method of certain embodiments of the present application;

[0018] Figure 5 is a flow chart of a control method according to certain embodiments of the present application;

[0019] Figure 6 It is a schematic diagram of the principle of the control method of certain embodiments of the present application;

[0020] Figure 7 It is a schematic diagram of the principle of the control method of certain embodiments of the present application;

[0021] Figure 8 is a flow chart of a control method according to certain embodiments of the present application;

[0022] Figure 9 is a flow chart of a control method according to certain embodiments of the present application;

[0023] Figure 10 is a flow chart of a control method according to certain embodiments of the present application;

[0024] Figure 11 This is a schematic diagram of the connection status of the storage medium and the controller in certain embodiments of the present application.

[0025] Description of main component symbols:

[0026] Drying device 100; storage medium 200, program 210; power supply 300;

[0027] 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 DESCRIPTION

[0028] The following further describes the embodiments of the present application in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions. Furthermore, the embodiments of the present application described below in conjunction with the accompanying drawings are exemplary and are intended only to explain the embodiments of the present application and are not to be construed as limiting the present application.

[0029] In the related art, high-power electrical equipment using alternating current, such as drying equipment (such as hair dryers, dryers, etc.), heating equipment, refrigeration equipment, hair styling appliances, beauty equipment, and medical instruments, includes a power load unit that can convert electrical energy into other energy. The way to control the power load unit is usually to control the duty cycle of the power load unit through a switch (such as a thyristor) to control the duty cycle of the power load unit, that is, the ratio of the on time to the total time. Assuming that 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 medium output power is required, the duty cycle is adjusted to 50%. At this time, the output power of the power load unit is 50%P max The essence of this control method is to cut off or turn on the power supply to the power load unit at high frequency. When the power supply to the power load unit is cut off, the load of the grid is 0, and when the power supply to the power load unit is turned on, the load of the grid is P max Since electrical equipment with power load units are high-power electrical equipment, high-frequency switching will cause the grid load to fluctuate between 0 and P. max When P max When the voltage fluctuation is large, the voltage fluctuation caused by this rapid change will affect other devices connected to the power grid (especially light radiation devices) or high-power electrical devices themselves, affecting the user experience. In order to solve this problem, the embodiment of the present application provides a control method ( Figure 3 ), electrical equipment (shown in FIG1 ) and storage medium 200 ( Figure 11 As shown). It should be noted that in the control method of each embodiment of the present application, the electrical equipment can be any equipment with high-power components and switches, such as various drying equipment 100, heating equipment, cooling equipment, hair styling appliances, welding machines, light radiation equipment, large motors, beauty equipment, medical instruments and other high-power equipment. Among them, heating equipment refers to equipment mainly used for heating, such as electric heaters, induction cookers, electric ceramic stoves, electric water heaters, heating rods, induction stoves and other equipment; cooling equipment refers to equipment used for cooling, which often also has a high-power compression motor, such as air conditioners (heating and cooling air conditioners can also be considered heating equipment), refrigerators, freezers, etc.; hair styling equipment includes curling irons, straightening irons, hair curlers, hair dyeing machines, etc.; light radiation equipment includes high-power incandescent lamps, light boxes and light walls composed of multiple lamps, infrared lamps, ultraviolet lamps, etc. The following mainly uses the drying equipment 100 as an example for explanation. The drying equipment 100 includes but is not limited to hair dryers, dryers, etc. Its main function is to promote the evaporation of moisture from the target object, but whether the drying process actually occurs should not be used as a limitation on the drying equipment 100.

[0030] Please refer to Figure 1(a) and Figure 2The drying device 100 of the embodiment of the present application 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 arranged in the housing 10. Each switch 23 is electrically connected to a power load unit. When the switch 23 is turned on, the current flows to the corresponding power load unit through the switch 23 for the power load unit to operate. The zero-crossing detection circuit 40 is used to generate a zero-crossing signal according to 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.

[0031] Among them, the shell 10 is a structure in the drying device 100 for accommodating and protecting the functional devices of the drying device 100 (including but not limited to the heater 21, the switch 23 and the radiation source 30, etc.). The material of the shell 10 can be a metal material and / or a non-metallic material, wherein the metal material includes but is not limited to aluminum, iron, steel or aluminum alloy, etc., and the non-metallic material includes but is not limited to plastic, etc. In one example, the shell 10 can be made of a metal material and a non-metallic material, thereby making the structural strength of the shell 10 higher and reducing the possibility of collision damage to the shell 10. In another example, the shell 10 can be made of a non-metallic material, for example, the shell 10 can be made of plastic, thereby making the weight of the shell 10 lighter, which is conducive to achieving the lightweight of the drying device 100.

[0032] 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 , where the heater 21 is used to generate heat and the radiation source 30 is used to radiate light.

[0033] The heater 21 may be a resistance wire or ceramic, etc. The resistance wire may be made of materials such as nickel-chromium alloy, iron-chromium-aluminum alloy, stainless steel or titanium alloy. In certain embodiments of the present application, the heater 21 includes one; or, the heater 21 includes at least two. In the case where the heater 21 includes at least two, the at least two heaters 21 may be connected in series in sequence, or may be connected in parallel with each other, or one part may be connected in series and the other part may be connected in parallel. Specifically, whether the at least two heaters 21 are connected in series or in parallel should be determined based on the specific situation of the drying equipment 100.

[0034] 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 installation and replacement of the heater 21.

[0035] In other embodiments, each heater 21 has a different heating power. That is, when there are two heaters 21, at least two heaters 21 have different full load powers. For example, when there are three heaters 21, the full load power of one heater 21 is 1000W, and the full load power of the other two heaters 21 is 500W. In this way, when the at least two heaters 21 are operated in combination, the drying device 100 can generate a variety of output powers, thereby improving the applicability of the drying device 100 and meeting the user's usage needs.

[0036] The radiation source 30 is a structure in the drying device 100 that can radiate light of a preset frequency band. The radiation source 30 can be a structure such as a halogen lamp, an LED lamp, etc. that can generate radiation in ultraviolet, infrared, visible light, etc. frequency bands. In certain embodiments of the present application, the multiple radiation sources 30 include multiple halogen lamps and / or multiple light-emitting diodes. It should be noted that when the drying device 100 is a hair dryer, the radiation source 30 can play a certain heating and drying role. Among them, when including at least two radiation sources 30, the at least two radiation sources 30 can be connected in series in sequence, or can be connected in parallel with each other, or one part can be connected in series and the other part can be connected in parallel. Specifically, whether the at least two radiation sources 30 are connected in series or in parallel needs to be determined according to the specific situation of the drying device 100.

[0037] In some embodiments, at least one power load unit includes a heater 21 and a radiation source 30. In this case, the heater 21 and the radiation source 30 are connected in parallel. Thus, the heater 21 and the radiation source 30 each have relatively independent power supply and control circuits. In other words, in the drying apparatus 100, the heater 21 and the radiation source 30 can be independently controlled and powered. Of course, in other examples, the heater 21 and the radiation source 30 can also be connected in series.

[0038] In other embodiments, at least one power load unit includes at least two heaters 21, and the at least two heaters 21 can be connected in series, in parallel, or partially in series and partially in parallel. In one example, at least one power load unit further includes a radiation source 30. Wherein, when the at least two heaters 21 are connected in series, the radiation source 30 can be connected in series with the at least two heaters 21; or, the radiation source 30 can be connected in parallel with the entirety formed by the at least two heaters 21 in series; when the at least two heaters 21 are connected in parallel, the radiation source can be connected in parallel with the at least two heaters 21; or, the radiation source 30 can be connected in series with one of the at least two heaters 21.

[0039] In some other embodiments, at least one power load unit includes at least two radiation sources 30. The at least two radiation sources 30 can be connected in series, in parallel, or partially in series and partially in parallel. In one example, at least one power load unit further includes a heater 21. Wherein, when the at least two radiation sources 30 are connected in series, the heater 21 can be connected in series with the at least two radiation sources 30; or, the heater 21 can be connected in parallel with the entire system formed by the at least two radiation sources 30 in series; when the at least two radiation sources 30 are connected in parallel, the radiation source can be connected in parallel with the at least two radiation sources 30; or, the heater 21 can be connected in series with one of the at least two radiation sources 30.

[0040] 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 in series, in parallel, or in a combination of series and parallel.

[0041] Exemplarily, there are two heaters 21 and two radiation sources 30. 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.

[0042] It can be understood that the number and connection method of the heaters 21 and the radiation sources 30 in the above embodiment are only exemplary. In other embodiments, the number and connection method of the heaters 21 and the radiation sources 30 may also include other forms, which are not illustrated one by one here.

[0043] For ease of explanation, in the following embodiments, when there are at least two heaters 21, at least two heaters 21 are connected in parallel. Each parallel branch includes a heater 21. Furthermore, the radiation source 30 is connected in parallel with the heater 12. Thus, the radiation source 30 and the heater 21 each have relatively independent power supply and control circuits. In other words, in the drying apparatus 100, the radiation source 30 and the heater 21 can be independently controlled and powered.

[0044] The switch 23 is a structure in the drying apparatus 100 that controls the AC power signal to be turned on or off according to a control signal. In certain embodiments of the present application, the switch 23 may be a silicon controlled rectifier (SCR) or a MOS transistor. 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 transition from a blocking state to a conducting state. In this state, current flows through the switch 23 to the corresponding heater 21, causing the 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 transition from a blocking state to a conducting state. In this state, current output by the power supply 300 can flow to the radiation source 30, causing the radiation source 30 to radiate light within a predetermined frequency band. It will be appreciated that in other embodiments, the radiation source 30 may 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.

[0045] 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 switch 23 and heater 21 together constitute the power load module 20 of the drying device 100. The power load module 20 includes at least two, and at least two power load modules 20 are connected in parallel.

[0046] It is understood that, in the present application, the current flowing to the heater 21 is alternating current. Alternating current is a current whose voltage direction changes periodically over time. Specifically, in certain embodiments of the present application, the frequency of the alternating current may be 50 Hz (Hertz) or 60 Hz.

[0047] The zero-crossing detection circuit 40 is a circuit structure in the drying device 100 for forming a zero-crossing signal according to the zero-crossing moment of the AC signal; the controller 50 is a structure in the drying device 100 for performing data processing. The controller 50 may include, but is not limited to, a microcontroller unit (MCU). In certain embodiments of the present application, when the zero-crossing detection circuit 40 forms a zero-crossing signal according to the zero-crossing moment 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 understandable that when the switch 23 includes multiple switches, the controller 50 can individually control the on-off state of a certain switch 23 to achieve individual control of multiple power load units. It should be noted that, in certain embodiments, the zero-crossing signal refers to the signal when the AC signal waveform passes through the zero point (i.e., the positive-negative switching point).

[0048] Furthermore, in some embodiments, the drying device 100 also 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 emitted by the power supply 300 and outputs a DC signal to the controller 50 to power the controller 50.

[0049] Specifically, in some embodiments, the rectifier circuit 80 can rectify the periodically varying AC signal output by the power supply 300 , thereby converting the AC signal into a DC signal, wherein the DC signal can be used to power the controller 50 .

[0050] 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.

[0051] It should be noted that the following description mainly takes the power load unit as the heater 21 as an example. The heater 21 is used to generate heat, that is, the main function of the heater 21 is to generate heat to promote the evaporation of water in the target object.

[0052] See also Figures 2 to 4 , a control method provided in an embodiment of the present application. The control method includes:

[0053] 01: Obtain each complete cycle N of the alternating current 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

[0054] 03: Control the on / off state of the switch 23 within a preset time, and the switch 23 is disconnected at least once in each complete cycle N.

[0055] The above control method can be applied to the drying device 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 turned on, current flows through the switch 23 to the heater 21 to operate the heater 21. It can be understood that the drying device 100 in this embodiment is exactly the same as the drying device 100 in the above embodiment, and a repeated description is not given here. Among them, 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 alternating current according to the zero-crossing signal, and the 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, and 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 of the two, and do not represent an absolute positive-negative relationship.

[0056] The preset time can be the entire usage time of the drying device 100, that is, the entire process from when the user turns the device on to when the user turns it off. The preset time can also be a portion of the usage time of the drying device 100, such as 50% of the usage time. The preset time can also correspond to user control of the drying device 100, for example, after adjusting the drying device 100 to a certain gear, the usage time within that gear is the preset time. The preset time can also correspond to a predetermined length of time, during which the above-mentioned control method is executed. During the use of the drying device 100, the control method is executed once or multiple times as needed, and the duration of each execution is the preset time.

[0057] Specifically, in certain embodiments, when the drying device 100 is started, the controller 50 can obtain a zero-crossing signal output by the zero-crossing detection circuit 40 and, based on the zero-crossing signal, obtain each complete cycle N of the alternating current, where the complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions. The controller 50 can also control the on / off state of the switch 23 within a preset time, with the switch 23 being disconnected at least once within each complete cycle N. That is, within the preset time, the controller 50 can control the switch 23 to be disconnected at least once within each complete cycle N.

[0058] Please combine Figure 4 In one example, the controller 50 may control the switch 23 to be disconnected once in each complete cycle N. In this case, the controller 50 may control the switch 23 to be disconnected in the positive cycle n1 and to be connected in the negative cycle n2; or the controller 50 may control the switch 23 to be disconnected in the negative cycle n2 and to be connected in the positive cycle n1. Figure 6In another example, the controller 50 may control the switch 23 to be disconnected twice in each complete cycle N. In this case, the controller 50 may control the switch 23 to be disconnected in both the positive cycle n1 and the negative cycle n2.

[0059] Optionally, the drying device 100 may include a button. When the user presses the button, the drying device 100 starts, and the controller 50 can obtain a zero-crossing signal and obtain each complete cycle N of the alternating current according to the zero-crossing signal.

[0060] Optionally, when the AC frequency is 50 Hz, each complete cycle N is 20 ms (milliseconds), and each complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions; when the AC frequency is 60 Hz, each complete cycle N is approximately 17 ms, and each complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions.

[0061] During use, when the drying device 100 is controlled by the switch 23, it may cause rapid changes in the grid load, thereby causing voltage fluctuations. Other electrical devices on the same grid will be affected by the voltage fluctuations. Among these electrical devices, the most common and easily perceived by users are light radiating devices, such as the radiation source 30 in some embodiments of the present application, or various lamps in a room. The following description of the present application focuses primarily on light radiating devices, but it should be noted that other electrical devices may also be affected.

[0062] The light radiating device continuously emits light when in use. The incandescent lamp or halogen lamp light source directly converts electrical energy into light and can be considered as not flickering, that is, the flickering frequency is 0Hz. When the switch 23 performs an on-off process, it causes a voltage fluctuation in the power grid, and the light radiating device correspondingly undergoes a brightness change, that is, a flicker. The frequency range to which the human eye is most sensitive to flicker is 10Hz-30Hz. When the light emitted by the light radiating device has a flickering frequency of 10Hz-30Hz, the user can clearly feel the flickering of the light, causing discomfort to the user; when the flickering frequency of the light is outside the range of 10Hz-30Hz, the user can hardly feel the flickering of the light.

[0063] In various embodiments of the present application, the controller 50 controls the switch 23 to disconnect at least once within each complete cycle N within a preset time, so that the flickering frequency of the light radiating device is at least the same as the frequency of the alternating current, or greater than the frequency of the alternating current. That is, when the electrical device used by the user adopts the control method of the embodiments of the present application, even if the light of the light radiating device flickers, its flickering frequency is greater than or equal to the frequency of the alternating current (50 Hz or 60 Hz), thereby ensuring that the flickering of the light will not affect the user. When using the drying device 100 in certain embodiments of the present application, the user will not feel the flickering of the lights in the room, nor will they feel the flickering of the light emitted by the radiation source 30, thereby improving the user experience.

[0064] Furthermore, in various embodiments of the present 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, it may affect the light from other light radiating devices during use. The aforementioned control method ensures that the flickering frequency of the light from these affected light radiating devices falls outside the human eye's sensitivity range. When the drying device 100 has a radiation source 30, the aforementioned control method not only ensures that the flickering frequency of the light from these affected light radiating devices falls outside the human eye's sensitivity range, but also ensures that the flickering frequency of the radiation source 30 itself falls outside the human eye's sensitivity range. In particular, in some embodiments, the radiation source 30 is a halogen lamp. Its heating principle is that the filament heats up to an incandescent state upon powering up, directly heating the target object through thermal radiation. If the radiation source 30 exhibits low-frequency flickering, in addition to causing eye discomfort, it can also cause the filament to lose its ability to maintain a stable temperature, causing the peak of the radiation spectrum to shift, deviating from the predetermined radiation band, and ultimately affecting the heating effect on the target object. The aforementioned embodiment avoids this issue, ensuring that the radiation source 30 consistently delivers optimal heating results.

[0065] See also Figure 2 、 Figure 4 and Figure 5 In some embodiments, 03: the switch 23 is disconnected at least once in each complete cycle N, including:

[0066] 031: In each complete cycle N, the switch 23 is disconnected in the negative cycle n2.

[0067] The controller 50 is further configured to execute the control method in 031. That is, the controller 50 is further configured to: within each complete cycle N, disconnect the switch 23 within the negative cycle n2.

[0068] The start and end times of the negative cycle n2 can be determined by the zero crossing. In some embodiments of the present application, the start and end times of the negative cycle n2 in each complete cycle N are determined by detecting the zero crossing. 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 is a characteristic of the alternating current itself, controlling based on the zero crossing can ensure the accuracy of the on-off timing and duration, thereby accurately controlling the power.

[0069] In addition, combined with the above content, it can be seen that when the negative cycle n2 is disconnected within each complete cycle N, it is equivalent to each complete cycle N corresponding to a flash of light from the light radiating device. Therefore, the flashing 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.

[0070] It should be noted that there is no essential difference between the negative cycle n2 and the positive cycle n1. The terms "positive" and "negative" refer to the opposite voltage directions, and are merely used as names to distinguish them. Therefore, the essence of the above description is that within a complete cycle N of AC power, one of the two half-cycles with opposite voltages is disconnected. Therefore, the above description can also be expressed as follows: within each complete cycle N, the switch 23 is disconnected during the positive cycle n1.

[0071] If the preset time includes a non-integer multiple of the number of complete cycles N of the AC power, then when the preset time is reached and the controller 50 directly controls the on-off switch 23 to open, the voltage will change. As a result, when adjusting the operating power of the heater 21, the voltage on the grid side will experience additional fluctuations, affecting the normal operation of the equipment connected to the grid. For example, if the preset time includes one complete cycle N and one incomplete cycle N, and the incomplete cycle N includes a positive cycle n1 and 1 / 2 of a negative cycle n2, then when the preset time is reached and the controller 50 directly controls the on-off switch 23 to open, the voltage of the positive cycle n1 within two adjacent complete cycles N remains unchanged, while the voltage of the negative cycle n2 within two adjacent complete cycles N changes once. As a result, when adjusting the operating power of the heater 21, the voltage on the grid side will fluctuate, affecting the normal operation of the equipment connected to the grid. For example, the voltage fluctuation on the grid side may cause the radiation source 30 to flicker.

[0072] Therefore, in certain embodiments of the present application, the preset time includes an integer multiple of a complete cycle N of the alternating current. Thus, within each complete cycle N, when the switch 23 is disconnected within the negative cycle n2, the voltage within two adjacent complete cycles N will not change, and when the operating power of the heater 21 is adjusted, the voltage of the power grid will not fluctuate, thereby preventing voltage fluctuations from affecting other devices connected to the power grid (such as the radiation source 30, etc.), thereby ensuring the normal operation of the devices connected to the power grid, reducing the possibility of failure of the devices connected to the power grid, and extending the service life of the devices.

[0073] See also Figure 2 , and combined with Figure 4 、 Figure 6 and Figure 7 , another control method provided by the embodiment of the present application. The control method includes:

[0074] 05: Control each power load module 20 to be 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: the first state ( Figure 6 As shown), the switch 23 remains disconnected; the second state ( Figure 7 As shown), the switch 23 remains on; the third state 50% ( Figure 4 As shown), each complete cycle N of the alternating current is obtained according to the zero-crossing signal, and the switch 23 is disconnected at least once in each complete cycle N.

[0075] The above control method can be applied to a drying device 100, which includes at least two power load modules 20 connected in parallel. Each power load module 20 includes an interconnected switch 23 and a heater 21. When the switch 23 is on, current flows through the switch 23 to the heater 21, thereby operating the heater 21. It will be appreciated that the drying device 100 in this embodiment is identical to the drying device 100 in the above embodiment, and a repeated description thereof will not be given here. The controller 50 is further configured to execute the control method described in 05. Specifically, the controller 50 is further configured 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: a first state in which the switch 23 remains off; a second state in which the switch 23 remains on; and a third state in which the switch 23 is disconnected at least once during each complete cycle N of the alternating current, as determined by a zero-crossing signal.

[0076] It should be noted that the specific steps of "the third state 50%, obtaining each complete cycle N of the alternating current according to the zero-crossing signal, and the switch 23 being disconnected at least once in each complete cycle N" in the control method of this embodiment are roughly the same as the specific steps of the control method of the above embodiment, and will not be repeated here.

[0077] As can be seen from the foregoing, in the first and second states, no switching occurs, thus causing no voltage fluctuations. In the third state, the frequency of the voltage fluctuations is the same as the frequency of the AC current itself, ensuring that the frequency of the light flickering caused by the light radiating device (and, in certain embodiments, the radiation source 30) is outside the sensitivity range of the human eye. Therefore, when the drying device 100 includes multiple power load modules 20, it is sufficient to ensure that each power load module 20 operates in one of the three states, or switches between two of them, to ensure that the frequency of the light flickering caused by the drying device 100 during use is outside the sensitivity range of the human eye, thus ensuring a satisfactory user experience.

[0078] Specifically, in some embodiments, the controller 50 can control the operating state of each power load module 20 to be at least one of the first state, the second state, and 50% of the third state within a preset time. It should be noted that in some embodiments, the operating states of each power load module 20 can be the same or different. For example, if there are two power load modules 20, the controller 50 can control the operating state of both power load modules 20 to be the third state within a preset time; or, within a preset time, the controller 50 can control the operating state of one power load module 20 to be the first state and the operating state of the other power load module 20 to be the third state.

[0079] 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 state, the second state, and the third state within a preset time. It should be noted that, in some embodiments, the switching method of the operating state of each power load module 20 can be the same or different. For example, in the case where there are two power load modules 20, the controller 50 can control the operating states of both power load modules 20 to switch between the first state and the third state within a preset time; or, the controller 50 can control the operating state of one power load module 20 to switch between the first state and the second state, and the operating state of another power load module 20 to switch between the first state and the third state within a preset time.

[0080] In summary, at least two power load modules 20 are arranged in parallel, and within a preset time, the controller 50 can control the operating state of each power load module 20 to be at least one of the first state, the second state, and 50% of the third state; 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 state, the second state, and the third state. Thus, the controller 50 can independently control at least two power load modules 20, so that at least two power load modules 20 can be combined to output a variety of different power, thereby making the drying device 100 suitable for different usage scenarios and usage requirements, thereby improving the user experience. In addition, the parallel arrangement of at least two power load modules 20 can also prevent a power load module 20 from affecting other power load modules 20 when a short circuit or other fault occurs, thereby improving the stability and reliability of the operation of the drying device 100.

[0081] See also Figure 2 , and combined with Figure 4 、 Figure 6 and Figure 7 In certain embodiments, when each power load module 20 operates in one of the first, second, and third states, at least two power load modules 20 jointly output a preset power; based on the different operating states of each power load module 20, the drying device 100 has multiple preset powers of varying magnitudes. As previously described, any preset power essentially corresponds to each of the multiple power load modules 20 operating in one of the first, second, and third states, resulting in a light flicker frequency outside the human eye's sensitivity range. It can also be understood that when each power load module 20 operates in one of the first, second, and third states, at least two power load modules 20 can combine to output multiple preset powers of varying magnitudes. On the one hand, this enables the drying device 100 to have multiple gears (working modes), so that the drying device 100 is suitable for different usage scenarios and usage requirements, and ensures that the light flicker frequency that may be caused by these gears is outside the sensitive range of the human eye, thereby improving the user experience; on the other hand, it can prevent a power load module 20 from affecting other power load modules 20 when a short circuit or other fault occurs, thereby improving the stability and reliability of the operation of the drying device 100; on the other hand, compared with including 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 long-term high-load operation, thereby reducing the possibility of damage to the power load module 20 and thus extending the service life of the power load module 20.

[0082] 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 an off state within 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 an on state within 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 alternating current is obtained according to the zero-crossing signal, and the complete cycle N includes a positive cycle n1 and a negative cycle n2 with opposite voltage directions; and within the preset time, the controller 50 controls the on-off state of the switch 23 corresponding to the power load module 20, and 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.

[0083] Exemplarily, when there are two power load modules 20 and the full load power of the power load units in the two power load modules 20 is 1000W, the drying device 100 may include five preset powers of different sizes according to the different operating states of the power load modules 20. Specifically, when the operating states of the two power load modules 20 are both in the first state, the preset power is 0W; when the operating state of one power load module 20 is the first state and the operating state of the other power load module 20 is the third state, the preset power is 500W; when the operating state of one power load module 20 is the first state and the operating state of the other power load module 20 is the second state, the preset power is 1000W; when the operating state of one power load module 20 is the second state and the operating state of the other power load module 20 is the third state, the preset power is 1500W; when the operating state of both power load modules 20 is the first state, the preset power is 2000W. That is, the five preset powers of the drying device 100 are 0W, 500W, 1000W, 1500W and 2000W respectively.

[0084] As can be seen from the above, in this embodiment, during the process of adjusting and selecting multiple preset powers of the drying equipment 100, other devices connected to the power grid (such as the radiation source 30, etc.) can maintain normal operation, thereby reducing the impact of voltage fluctuations on the devices connected to the power grid.

[0085] In some embodiments, the drying device 100 has multiple operating modes, each operating mode corresponding to a preset power.

[0086] Specifically, in some embodiments, the multiple operating modes may have different design objectives, and the multiple operating modes may correspond to different preset power levels. For example, using the drying device 100 as a hair dryer, the drying device 100 may have five predetermined operating modes based on the hair drying speed: cold air, medium-low heat, medium heat, medium-high heat, and high heat. Alternatively, five predetermined operating modes may be preset based on the drying time: low speed, medium-low speed, medium speed, medium-high speed, and high speed. After turning on the drying device 100, the user may select a different operating mode based on their specific needs. It is understood that 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, the low speed, medium-low speed, medium speed, medium-high speed, and high speed may correspond to 0W, 500W, 1000W, 1500W, and 2000W, respectively.

[0087] Furthermore, referring to Figure 1 , in some embodiments, the drying device 100 further includes a gear selection mechanism 60 , which is disposed on the housing 10 and is configured to select one of multiple operating modes in response to user operation. It should be noted that in some embodiments, the gear selection mechanism 60 may include, but is not limited to, a knob, a button, a sliding switch, a touch screen, etc. When the drying device 100 is powered on, the user can operate the gear selection mechanism 60 to adjust the operating mode.

[0088] During the blow-drying process, shorter drying times indicate faster hair dehydration, making hair more susceptible to excessive dehydration and high-temperature damage. Based on different hair qualities and usage habits, different users tend to choose different drying times when using the drying device 100 to dry their hair. For example, users with short hair or those with less sensitive hair texture tend to dry quickly to save time and choose the operating mode with the shortest drying time. Users with medium-to-long hair or those with more sensitive hair texture tend to dry slowly and choose the operating mode with a longer drying time.

[0089] In some of the aforementioned embodiments, the drying device 100 provides multiple preset operating modes corresponding to different blowing speeds for different users to choose from. In other embodiments, users can continuously adjust the blowing speed based on their specific needs. This can further optimize the user experience, meet more personalized user needs, and enhance the user experience.

[0090] Furthermore, in some embodiments, the drying device 100 further includes a stepless adjustment structure 70, which is configured to respond to a user's stepless adjustment to select a target power. It should be noted that in some embodiments, the target power may be greater than or equal to a minimum preset power and less than or equal to a maximum 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, the target power may be greater than or equal to 0 and less than or equal to 2000W.

[0091] Optionally, the stepless adjustment structure 70 includes a knob disposed on the housing 10 and responsive to user rotation; and / or, the stepless adjustment structure 70 includes a touchscreen disposed on the housing 10 and responsive to user touch. When the drying device 100 is powered on, the user can operate the knob and / or touchscreen to adjust the operating mode. In some embodiments (not shown), the drying device 100 can also be connected to an external smart terminal, allowing the user to operate the drying device 100 and adjust the operating mode through the smart terminal.

[0092] See also Figure 2 and Figure 8 In some embodiments, the control method further comprises:

[0093] 061: Determine the working mode selected by the user;

[0094] 063: Control the operating status of each power load module 20 to achieve the corresponding preset power.

[0095] The controller 50 is further configured to execute the control methods in steps 061 and 063. That is, the controller 50 is further configured 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.

[0096] Specifically, in some embodiments, the controller 50 can determine the operating mode selected by the user 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 heaters 21 in the two power load modules 20 is 1000W, if it is determined that the operating mode selected by the user is the medium speed gear, the controller 50 can control the operating state of one power load module 20 to be the first state and the operating state of the other power load module 20 to be the second state to achieve the corresponding preset power (1000W).

[0097] See also Figure 2 and Figure 9 In some embodiments, the control method further comprises:

[0098] 071: Determine the target power selected by the user in a stepless adjustment mode;

[0099] 073: Obtain two preset powers closest to the target power and record them as the first preset power and the second preset power;

[0100] 075: Control the operating status of each power load module 20, first output the first preset power within the first time, and then output the second preset power within the second time, wherein the sum of the durations of the first time and the second time 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.

[0101] The controller 50 is further configured to execute the control methods in 071, 073, and 075. Specifically, the controller 50 is further configured to: determine a target power selected by a user in a stepless adjustment manner; obtain two preset powers closest to the target power and record them as a first preset power and a second preset power; and control the operating state of each power load module 20 to first output the first preset power within a first time period and then output the second preset power within a second time period, wherein the sum of the durations of the first and second times is equal to the duration of the preset time period, 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 time period is equal to the product of the preset time and the target power.

[0102] Specifically, in certain 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 powers closest to the target power, and control the operating state of each power load module 20, first outputting the first preset power within the first time, and then outputting the second preset power within the second time, 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 sum of the durations of the first time and the second time equals the duration of the preset time, thereby obtaining the values of the first time and the second time. In this way, the total output power of the drying device 100 within the preset time is equal to the target power, thereby approximately achieving stepless adjustment, allowing the drying device 100 to output any power, thereby effectively meeting the user's usage needs and improving the user experience. In combination with the above content, it can be seen that after the user selects any power by steplessly adjusting the drying device 100, during the operation of the drying device 100, each power load module 20 is essentially still operating or switching at the aforementioned preset power. In this way, under the premise that the drying device 100 can output any target power as needed, it still has the aforementioned technical effect of "the light flicker frequency is outside the sensitive range of the human eye", and the relevant content will not be repeated.

[0103] 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 process of the drying device 100 is different from any preset power. If the user selects the target power of the drying device 100 in a stepless adjustment manner and it is exactly the same as a preset power, there is no need to perform the steps regarding the first preset power and the second preset power in the previous or subsequent texts, and 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 heater 21 in both power load modules 20 is 1000W, the five preset powers of the drying device 100 are 0W, 500W, 1000W, 1500W, and 2000W. In this case, if the target power selected by the user in the stepless adjustment mode determined by the controller 50 is 1250W, then the two preset powers closest to the target power are 1000W and 1500W. In this way, the controller 50 can control the operating state of each power load module 20 to output 1000W in the first time and then output 1500W in the second time. The sum of the first and second time durations equals the preset time duration, and the value of the first and second time can be obtained by calculating first time * 1000 + second time * 1500 = T * 1250. 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.

[0104] In some embodiments, the controller 50 can independently control the operating state of each power load module 20, first outputting a first preset power within a first time, and then outputting a second preset power within a second time, 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. Specifically, the controller 50 can control at least one power load module 20 to output the first preset power within a first time, and control at least another power load module 20 to output the second preset power within a second time, 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. For example, if there are two power load modules 20, the full load power of the heaters 21 in the two power load modules 20 is 1000W, and the target power is 750W, the controller 50 obtains two preset powers closest to the target power, namely 500W and 1000W. In this case, the controller 50 can control one power load module 20 to output 500W within the first time, at which point the operating state of the power load module 20 is the third state; and then control the other power load module 20 to output 1000W within the second time, at which point the operating state of the power load module 20 is the second state. In this way, 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, that is, the drying device 100 outputs the target power within the preset time T.

[0105] It should be noted that, in one example, when the controller 50 individually controls the operating state of each power load module 20 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 operating state of each power load module 20 is the same. In other words, during the first time, the operating state of all power load modules 20 is the same, and during the second time, the operating state of all power load modules 20 is the same. For example, during the first time, the controller 50 controls the operating state of all power load modules 20 to be the third state.

[0106] In another example, when the controller 50 independently controls the operating state of each power load module 20 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 operating state of each power load module 20 is different. For example, if the controller 50 controls the operating state of at least one power load module 20 to be the second state, the controller 50 also controls the operating state of at least another power load module 20 to be the third state.

[0107] In other embodiments, the controller 50 may control the operating state of each power load module 20 as a whole, first outputting the first preset power within a first time, and then outputting the second preset power within a second time, 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. Specifically, the controller 50 may control each power load module 20 to collectively output the first preset power within the first time, and control each power load module 20 to collectively output the second preset power within the second time, 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. For example, if there are two power load modules 20, the full load power of the heaters 21 in the two power load modules 20 is 1000W, and the target power is 1250W, the controller 50 obtains two preset powers closest to the target power, namely 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. At this time, the operating states of the two power load modules 20 can be the third state, or the operating state of one power load module 20 is the first state and the operating state of the other power load module 20 is the second state; control each power load module 20 to output 1500W together in the second time. At this time, the operating state of one power load module 20 is the second state and the operating state of the other power load module 20 is the third state. In this way, 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 device 100 outputs the target power within the preset time.

[0108] In summary, since the preset power jointly output by each power load module 20 is switched from the first preset power to the second preset power within the preset time, the power output within the first time and the second time are not the same within the preset time. If the preset time is too long, the user 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 the radiation source 30).

[0109] Therefore, in certain embodiments of the present application, taking the AC frequency of 50 Hz as an example, the preset time can be 2.5 seconds (including 125 complete cycles N), and the preset time is cycled 24 times per minute. Combined with the foregoing, it can be seen that within the preset time, the voltage fluctuations that may be generated by the operation of the drying equipment 100 will not cause the light flashing frequency of the light radiation equipment to be within the sensitive range of the human eye, thereby 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 enhance the user experience.

[0110] See also Figure 2 and Figure 9 In some other embodiments, the control method further includes:

[0111] 081: Determine the target power selected by the user in a stepless adjustment mode;

[0112] 083: Control at least one power load module 20 to continuously output power within a preset time, and record the output power as a first output power;

[0113] 085: Control at least another power load module 20 to continuously output within a first time within a preset time, and its output power is recorded as a 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] The controller 50 is further configured to execute the control methods in 081, 083, and 085. That is, the controller 50 is further configured to: determine a target power selected by a user in a stepless adjustment manner; control at least one power load module 20 to continuously output power within a preset time, with its output power recorded as a first output power; and control at least another power load module 20 to continuously output power within a first time within a preset time, with its output power recorded as a 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.

[0115] Specifically, in certain embodiments, the controller 50 can determine the target power selected by the user in a stepless adjustment manner through the stepless adjustment structure 70, control at least one power load module 20 to continuously output within a preset time, and record its output power as a first output power. It can also control at least another power load module 20 to continuously output within a first time within the preset time, and record its output power as a second output power, so 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, assuming 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, thereby achieving the target power. It can also be understood that the preset time includes two stages: at least two power load modules 20 operate simultaneously within the first time, and only one power load module 20 operates within the (preset time - first time) time. In this way, the drying device 100 can output the target power within the preset time, that is, the drying device 100 can achieve stepless adjustment and can output any power, thereby effectively meeting the user's usage needs and improving the user's usage experience.

[0116] 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 the third state. That is, the controller 50 controls at least one power load module 20 to continuously output in the third state for a predetermined period of time, and controls at least another power load module 20 to continuously output in the third state for a predetermined period of time. This allows for stepless regulation of the drying apparatus 100. Furthermore, each power load module 20 has the same output power, which ensures more even power distribution and prevents excessive voltage fluctuations.

[0117] In other embodiments, the controller 50 can control each power load module 20 to operate in a different operating state. For example, the controller 50 can control at least one power load module 20 to continuously operate in one of the first state, the second state, and the third state, and control at least another power load module 20 to continuously operate in the other of the first state, the second state, and the third state; or, control at least another power load module 20 to switch arbitrarily between any two of the first state, the second state, and the third state. That is, the controller 50 controls at least one power load module 20 to continuously output in one of the first state, the second state, and the third state within a preset time, and controls at least another power load module 20 to continuously operate in the other of the first state, the second state, and the third state within a first time within a preset time; or, controls at least another power load module 20 to switch arbitrarily between any two of the first state, the second state, and the third state within a first time to output within a preset time. Thus, at least another 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 achieving stepless adjustment of the drying equipment 100.

[0118] Exemplarily, the controller 50 can control at least one power load module 20 to continuously output in the second state within a preset time, and control at least another power load module 20 to output in the first state, the third state, or any two of the first state, the second state and the third state within a preset time.

[0119] See also Figure 2 , and combined with Figure 4 、 Figure 6 and Figure 7 In some embodiments, the control method further comprises:

[0120] 09: In the unit time, the power load module 20 is in the first state during the first 50% of the time, and switches between the second state and the third state during the second 50% of the time. The preset time is an integer multiple of the unit time.

[0121] The controller 50 is further configured to execute the control method in 09. That is, the controller 50 is further configured to: within a unit time, the power load module 20 is in the first state for the first 50% of the time, and switch between the second state and the third state for the second 50% of the time, wherein the preset time is an integer multiple of the unit time.

[0122] Among them, since the output power of the power load module 20 is greatly different when the operating state of the power load module 20 is the second state or the third state, if the power load module 20 runs for a long time in the third state, the average output power of the power load module 20 will decrease, that is, the heat generated by the heater 21 will decrease. At this time, the wind temperature of the drying equipment 100 will drop; if the operating state of the power load module 20 switches between the second state and the third state at a lower frequency (that is, the number of switching times between the second state and the third state is small), the output power of the power load module 20 will produce a large change between the maximum power and the lower power, causing the wind temperature to rise and fall rapidly in a short time, and the wind temperature curve to fluctuate in a jagged manner, which causes the user to perceive the wind temperature change, affecting the user's usage experience.

[0123] In certain embodiments of the present application, the controller 50 controls the power load module 20 to be in the first state during the first 50% of the time in the unit time, and switches the power load module 20 between the second state and the third state during the second 50% of the time. This prevents the frequency of switching the operating state of the power load module 20 between the second state and the third state from being too low, avoids the problem of wind temperature drop and sawtooth fluctuation of the wind temperature curve, and thus improves the user experience.

[0124] For example, the unit time length may be 5 seconds. Specifically, the controller 50 may control the power load module 20 to be in the first state within the first 2.5 seconds, and to switch between the second state and the third state within the last 2.5 seconds. After the controller 50 determines the target power selected by the user in a stepless adjustment manner, the controller 50 may determine the switching frequency of the power load module 20 between the second state and the third state in the last 2.5 seconds of each unit time length based on the target power, and control the power load module 20 to operate continuously with the unit time length as the basic cycle unit.

[0125] See also Figure 2 and Figure 11 The present 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, the control method of any embodiment described above is implemented.

[0126] For example, when the program 210 is executed by the controller 50, the following control method is implemented:

[0127] 01: Obtain each complete cycle N of the alternating current 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

[0128] 03: Control the on / off state of the switch 23 within a preset time, and the switch 23 is disconnected at least once in each complete cycle N.

[0129] For another example, please combine Figure 4 、 Figure 6 and Figure 7 When the program 210 is executed by the controller 50, the following control method is implemented:

[0130] 05: 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: in the first state, the switch 23 remains disconnected; in the second state, the switch 23 remains connected; in the third state 50%, each complete cycle N of the alternating current is obtained according to the zero-crossing signal, and the switch 23 is disconnected at least once in each complete cycle N.

[0131] For another example, when program 210 is executed by controller 50, the control methods in 031, 061, 063, 071, 073, 075, 081, 083, 085, and 09 can also be implemented.

[0132] It should be noted that the explanations of the control method and the electrical device in the aforementioned embodiments are also applicable to the storage medium 200 in the embodiments of the present application and will not be elaborated here.

[0133] In the storage medium 200 of the present application, the on-off state of the switch 23 is controlled within a preset time, and the switch 23 is disconnected at least once in each complete cycle N. In this way, the frequency of change of the grid load in this embodiment is greater than or equal to the frequency of the alternating current. At this time, the flickering frequency of the optical radiation device connected to the 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 flickering frequency of the optical radiation device connected to the grid due to the influence of the switch 23 is greater than or equal to 50Hz or 60Hz. Since the frequency range to which the human eye is most sensitive to flicker is 10Hz-30Hz, this embodiment can ensure that the flickering frequency of the optical radiation device is higher than the flicker sensitivity range of the human eye, that is, the bright and dark flickering of the optical radiation device connected to the grid will not affect the user, thereby improving the user experience.

[0134] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0135] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0136] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a storage medium can be any device that can contain, store, communicate, propagate, or transmit a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of storage media include the following: an electrical connection having one or more wires (electronic device), a portable computer disk cartridge (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). Furthermore, the storage medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0137] It should be understood that various parts of the present 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 a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0138] Those skilled in the art will appreciate that all or part of the steps carried out in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program can be stored in a storage medium, which, when executed, includes one of the steps of the method embodiment or a combination thereof. In addition, the functional units in the various embodiments of the present application can be integrated into a processing module, or each unit can exist physically alone, or two or more units can be integrated into one module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. The above-mentioned storage medium can be a read-only memory, a disk or an optical disk, etc.

[0139] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A control method for electrical equipment, characterized in that: The electrical device includes a switch and a power load unit, wherein the switch is electrically connected to the power load unit. When the switch is turned on, current flows through the switch to the power load unit to operate the power load unit. The control method includes: Acquire each complete cycle of the alternating current according to 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, 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 is disconnected at least once in each complete cycle, including: In each of the complete cycles, the switch is opened in the negative cycle.

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

4. A control method for electrical equipment, characterized in that: The electrical device includes 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, and when the switch is turned on, current flows through the switch to the power load unit to operate the power load unit; the control method includes: Controlling each of the power load modules to be in at least one of the following three operating states within a preset time, and / or controlling each of the power load modules to switch between any two of the following three operating states: In the first state, the switch remains disconnected; In the second state, the switch remains on; In the third state 50%, each complete cycle of the alternating current is obtained according to 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 operates in one of the first state, the second state, and the third state, at least two of the power load modules jointly output a preset power; According to different operating states of each power load module, the electrical device has a plurality of preset powers of different sizes.

6. The control method according to claim 5, characterized in that: The electrical device has multiple operating modes, each operating mode corresponds to a preset power; the control method further includes: Determining the operating mode selected by the user; The operating state of each power load module is controlled 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 in a stepless adjustment manner; Obtaining the two preset powers closest to the target power and recording them as a first preset power and a second preset power; Control the operating status of each power load module, first output the first preset power within the first time, and then output the second preset power within the second time, wherein the sum of the durations of the first time and the second time 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 in a stepless adjustment manner; Controlling at least one of the power load modules to continuously output power within the preset time, and recording the output power as a first output power; Within the preset time, at least another power load module is controlled to continuously output within a first time, and its output power is recorded as a 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.

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

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

11. The electrical device 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, wherein the heater is used to generate heat and the radiation source is used to radiate light.

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

13. The electrical device according to claim 10, characterized in that Also includes: a gear selection structure, the gear selection structure being provided on the housing and configured to select one of a plurality of operating modes in response to a user operation; and / or, The stepless adjustment structure is used to select the target power in response to the user's stepless adjustment.

14. The electrical device according to claim 13, characterized in that The stepless adjustment structure includes: a knob, the knob being disposed on the housing and responding to a rotation operation by the user; and / or, A touch screen is provided on the housing and responds to a touch operation by the user.

15. The electrical device 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 device according to claim 10, characterized in that The electrical device further comprises: The 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 device according to claim 10, characterized in that The electrical device is any one of a drying device, a heating device, a refrigeration device, a hair styling appliance, a motor control device, and a light radiation device.

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

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