Zero crossing point calibration method, device and equipment of household appliance and readable storage medium

Abstract

The invention relates to a zero crossing point calibration method, device and equipment for household appliances and a readable storage medium, and the zero crossing point calibration method for the household appliances comprises the following steps: detecting a hardware zero crossing point moment under a first voltage, starting a first timer, and starting a second timer within a change period of an alternating current, countdown is carried out according to a preset duration corresponding to the first voltage; in the countdown process according to the preset time corresponding to the current voltage, a hardware zero crossing point moment under the second voltage is detected, a second timer is started, and countdown is carried out according to the preset duration corresponding to the second voltage; and after the preset duration is completed, triggering an interruption moment which is the calibrated current zero crossing point. According to the zero-crossing point calibration method of the household appliance, the hardware zero-crossing point is detected through a software method, the method is simple and easy to operate, and a more accurate current zero-crossing point can be obtained under the condition that hardware equipment is not added.

Description

Technical Field

[0001] The present invention relates to the field of intelligent electrical equipment, and in particular to a method, device, equipment and readable storage medium for zero-crossing calibration of household electrical appliances. Background Art

[0002] In the prior art, due to the zero-crossing signal deviation generated by the hardware itself, deviations will occur when the thyristor is triggered. That is, the thyristor is not triggered at the actual zero crossing, but lags behind the actual AC zero crossing. The triggering of the thyristor causes the AC power to be distorted and produce conducted interference. Conventional household appliances on the market will use some EMC suppression devices, such as common-mode inductors.

[0003] However, when encountering small household appliances with small structures, such as high-speed hair dryers, high-power heating devices, such as 1600W heating wire (voltage 220V), are controlled by thyristors, it is impossible to install some EMC suppression devices. At this time, it is necessary to trigger the thyristor at the true zero point so that the thyristor can be turned on at the true zero point to avoid distortion of the mains, thereby reducing conducted interference and saving hardware costs.

[0004] However, how to achieve accurate zero-crossing triggering of thyristors with almost no increase in hardware cost has become a meaningful issue that electronic engineers need to consider. Summary of the invention

[0005] Based on this, it is necessary to provide a method, device, equipment and readable storage medium for zero-crossing calibration of household appliances in response to at least one of the problems mentioned above.

[0006] In a first aspect, the present application provides a method for zero-crossing calibration of household appliances, which comprises the following steps within an alternating current change cycle:

[0007] Upon detecting a hardware zero-crossing moment under a first voltage, a first timer is started to count down for a preset time duration corresponding to the first voltage;

[0008] During the countdown for the preset time corresponding to the current voltage, a hardware zero-crossing moment under the second voltage is detected, and a second timer is started to count down for the preset time corresponding to the second voltage;

[0009] When the preset time is completed, the interruption time is triggered, and the interruption time is the calibrated current zero-crossing point.

[0010] In certain implementations of the first aspect, the preset duration is determined by the following steps:

[0011] Under a plurality of preset voltages, respectively detecting a hardware zero-crossing point and an actual zero-crossing point under each of the preset voltages;

[0012] Determining a correction duration corresponding to the preset voltage according to a time difference between the hardware zero-crossing point and the actual zero-crossing point;

[0013] Determine a correction time data table according to the correction time corresponding to the plurality of preset voltages;

[0014] The preset duration is determined according to the first voltage or the second voltage and the correction duration data table.

[0015] In combination with the first aspect and the above implementation manner, in some implementation manners of the first aspect, the step of determining the correction time length corresponding to the preset voltage includes:

[0016] Under each preset voltage, multiple tests are performed to obtain multiple sets of hardware zero-crossing points and actual zero-crossing points, and the average data of the correction time length is used as the correction time length corresponding to the preset voltage.

[0017] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, starting the first timer includes: when it is detected that the electrical signal in the hardware changes from a low level to a high level under the first voltage, starting the first timer.

[0018] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, starting the second timer includes: when it is detected that the electrical signal in the hardware changes from a low level to a high level under the second voltage, starting the second timer.

[0019] In a second aspect, the present application provides a zero-crossing calibration device for household appliances, comprising:

[0020] A first detection timing module, configured to detect a hardware zero-crossing moment under a first voltage, and start a first timer to count down for a preset time duration corresponding to the first voltage;

[0021] A second detection timing module is used to detect the hardware zero-crossing moment under the second voltage during the countdown of the preset time corresponding to the current voltage, and start the second timer to count down for the preset time corresponding to the second voltage;

[0022] The zero-crossing point determination module is used to trigger an interruption moment after the preset time period is completed, and the interruption moment is the calibrated current zero-crossing point.

[0023] In some implementations of the second aspect, the preset duration is determined by the following steps:

[0024] Under a plurality of preset voltages, respectively detecting a hardware zero-crossing point and an actual zero-crossing point under each of the preset voltages;

[0025] Determining a correction duration corresponding to the preset voltage according to a time difference between the hardware zero-crossing point and the actual zero-crossing point;

[0026] Determine a correction time data table according to the correction time corresponding to the plurality of preset voltages;

[0027] The preset duration is determined according to the first voltage or the second voltage and the correction duration data table.

[0028] In the third aspect, the present application provides a zero-crossing calibration device for household appliances, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the zero-crossing calibration method for household appliances as described in any one of the first aspects of the present application are implemented.

[0029] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the zero-crossing calibration method for household appliances as described in any one of the first aspects of the present application.

[0030] The technical solution provided in the embodiments of the present invention brings the following beneficial technical effects:

[0031] The zero-crossing point calibration method for household appliances provided by the present invention detects the hardware zero-crossing point by a software method, starts a timer when the hardware zero-crossing point occurs, and calibrates the current zero-crossing point of the household appliance at a certain working voltage according to a preset time length determined by empirical data. The method is simple and easy to operate, and can obtain a more accurate current zero-crossing point without adding hardware equipment.

[0032] Additional aspects and advantages of the present application will be given in subsequent parts and will be understood in detail from the subsequent description or learned through specific implementations of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a flowchart of a method for zero-crossing calibration of household electrical appliances in one embodiment of the present invention;

[0034] Figure 2 A schematic diagram of a flow chart of a method for determining a preset duration in one embodiment of the present invention;

[0035] Figure 3 A schematic diagram of the corresponding relationship between different voltages and preset time lengths in one embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the relationship between a timer and a hardware zero-crossing time in an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of the structural framework of a zero-crossing calibration device for household electrical appliances in one embodiment of the present invention;

[0038] Figure 6 Schematic diagram of the structural framework of a zero-crossing calibration system for household appliances in one embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Possible embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein by the drawings. The embodiments described with reference to the drawings are exemplary and are used to make the understanding of the disclosure of the present invention more thorough and comprehensive, and cannot be interpreted as limiting the present invention. In addition, if the detailed description of the known technology is non-essential technology for the features of the present invention shown, these technical details may be omitted.

[0040] It will be understood by those skilled in the relevant art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with those in the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0041] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that the term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0042] The technical solution of the present invention and how the technical solution solves the above-mentioned technical problems are described in detail below with specific embodiments.

[0043] The embodiment of the first aspect of the present application provides a zero-crossing calibration method for household appliances. In an alternating current change cycle, such as Figure 1 As shown, the following steps are included:

[0044] S100: Detect the hardware zero-crossing moment under the first voltage, start the first timer, and count down with a preset time length corresponding to the first voltage. As described above, because household appliances have a relatively complex electrical component structure, zero-crossing signal deviation will occur, which will cause the thyristor to be triggered not at the actual zero-crossing moment, but to lag behind the actual AC zero-crossing point. Failure to trigger the switch of the thyristor at the actual zero-crossing moment will cause the AC power distortion to produce conducted interference. Detect the hardware zero-crossing point of the household appliance under the actual first voltage. The hardware zero-crossing point is an inaccurate zero-crossing point obtained by the internal detection device or detection circuit of the household appliance. At this time, quickly trigger the timer, that is, the first timer, through the countdown of the first timer, and perform subsequent actions at the end of the countdown to find the real zero-crossing point.

[0045] S200: In the process of counting down with the preset time corresponding to the current voltage, the hardware zero-crossing point under the second voltage is detected, and the second timer is started to count down with the preset duration corresponding to the second voltage. In an alternating current change cycle, if the hardware zero-crossing point under the first voltage is detected, and at this moment it happens to be the starting zero-crossing point of the sine wave, then when the second zero-crossing point is detected, the preset duration corresponding to the first voltage has not yet counted down, which will obviously affect the calibration to obtain the true zero-crossing point corresponding to the second zero-crossing point. Therefore, the second timer is introduced and is started when the hardware zero-crossing point under the second voltage is detected. The first timer and the second timer work alternately and independently without interfering with each other, ensuring that the zero-crossing point is calibrated in each alternating current change cycle. The first voltage and the second voltage described here are to reflect the actual use environment of household appliances as much as possible. The mains power changes at different times. Of course, in some cases, the first voltage and the second voltage can be equal in value.

[0046] S300: After the preset time is completed, the interruption time is triggered, and the interruption time is the current zero crossing point after calibration. The preset time is obtained by querying the data table, and the generation of the data table is described in detail later.

[0047] Home appliances are powered directly or indirectly by the mains, which is a typical alternating current. In a cycle, the alternating current has three zero-crossing points, of which the third zero-crossing point is the first zero-crossing point of the next cycle. For the mainstream zero-crossing detection circuit on the market, as the voltage decreases, the pulse width becomes wider, and the zero-crossing point also shifts accordingly. Therefore, the zero-crossing point detected by the hardware itself is not accurate, and usually lags behind the true zero-crossing point. Only by finding this "true zero-crossing point" can the circuit of home appliances be better controlled to make them run safely and smoothly.

[0048] Specifically, in some implementations of the first aspect of the embodiment, the preset duration described in S100 to S300 is determined by the following steps:

[0049] S101: Under several preset voltages, the hardware zero-crossing point and the actual zero-crossing point under each preset voltage are detected respectively. In the manufacturer of household electrical appliances, this work is carried out in the design and adjustment link of the equipment to determine the correction time data table suitable for the household electrical appliances. Within the working voltage range of the household electrical appliances, multiple tests are carried out at a certain voltage interval, and the hardware zero-crossing point and the actual zero-crossing point of the household electrical appliances under each preset voltage are obtained through auxiliary detection equipment, and the corresponding time is recorded. For example, from 110v to 313v, 204 sets of data will be obtained if the test is performed every 1v.

[0050] S102: Determine the correction time corresponding to the preset voltage according to the time difference between the hardware zero-crossing point and the actual zero-crossing point. Accordingly, the time difference is the zero-crossing correction time of the home appliance under the preset voltage, and the first timer or the second timer counts down according to the correction time.

[0051] S103: Determine a correction time data table based on the correction time corresponding to a plurality of preset voltages. Figure 3 As shown, the correction time is made corresponding to the preset voltage to create a correction time data table. For example, the 204 sets of data mentioned above include these data in the correction time data table.

[0052] S104: Determine the preset duration according to the first voltage or the second voltage and the correction duration data table. In application, according to the first voltage, find the corresponding voltage data in the correction duration data table, and then find the correction duration data corresponding to the voltage data, that is, the preset duration corresponding to the first voltage or the preset duration corresponding to the second voltage.

[0053] Further, in combination with the embodiment of the first aspect and the above-mentioned implementation, in other implementations of the embodiment of the first aspect, the step of determining the correction duration corresponding to the preset voltage in S102 specifically includes: at each preset voltage, multiple tests are performed to obtain multiple groups of hardware zero crossings and actual zero crossings, and the average data of the correction duration is used as the correction duration corresponding to the preset voltage. In order to obtain the most accurate correction duration as possible, multiple measurements can be performed to perform data processing to obtain a more accurate data table. In addition, the data interval of the preset voltage can be further refined to obtain more and more sufficient data.

[0054] Optionally, in combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, starting the first timer includes: when it is detected that an electrical signal in the hardware changes from a low level to a high level under a first voltage, starting the first timer.

[0055] Optionally, in combination with the first aspect and the above-mentioned implementations, in some implementations of the first aspect, starting the second timer includes: when it is detected that the electrical signal in the hardware changes from a high level to a low level under the second voltage, starting the second timer.

[0056] Each hardware zero crossing needs to be reloaded to obtain the next accurate software zero crossing time, that is, the calibrated zero crossing time, refer to Figure 4 At point a, the hardware zero crossing is detected, and TIM1 countdown is triggered. For example, the countdown duration is 10 milliseconds. Ideally, when TIM1 countdown is completed and reaches zero, it reaches point b, just reaching the second hardware zero crossing. But in fact, it is not. TIM1 is still counting down and has not reached zero. The home appliance has reached the second hardware zero crossing. Only when TIM1 completes the countdown, the interrupt is triggered and the precise zero crossing moment is reached. Therefore, at point a, the first countdown (for example, 10 milliseconds) is loaded to TIM1, and TIM1 is automatically decremented to 0 to generate an interrupt, that is, point b is the real zero crossing point. At point c, TIM2 is loaded with 10 milliseconds, and TIM2 is automatically decremented to 0 to generate an interrupt, that is, point e is the second real zero crossing point in a cycle. In the process, TIM1 is continuously decremented at point d. This cycle is repeated and the first timer and the second timer do not interfere with each other. According to the hardware zero crossing moment, combined with the real-time voltage and loading duration data, the software zero crossing moment, that is, the real current zero crossing point, is determined.

[0057] The present application provides a second aspect of a zero-crossing calibration device 10 for household appliances, such as Figure 5 As shown, it includes a first detection timing module 11, a second detection timing module 12 and a zero-crossing point determination module 13.

[0058] The first detection timing module 11 is used to detect the hardware zero-crossing moment under the first voltage, start the first timer, and count down for a preset time period corresponding to the first voltage.

[0059] The second detection timing module 12 is used to detect the hardware zero-crossing moment of the second voltage during the countdown of the preset time corresponding to the current voltage, and start the second timer to count down for the preset time corresponding to the second voltage.

[0060] The zero-crossing point determination module 13 is used to trigger an interruption moment after a preset time period is completed. The interruption moment is the calibrated current zero-crossing point.

[0061] Specifically, in certain implementations of the second aspect, in the first detection timing module 11, the second detection timing module 12 and the zero-crossing point determination module 13, the preset duration is determined by the following steps: under several preset voltages, the hardware zero-crossing point and the actual zero-crossing point under each preset voltage are detected respectively; according to the time difference corresponding to the hardware zero-crossing point and the actual zero-crossing point, the correction duration corresponding to the preset voltage is determined; according to the correction duration corresponding to several preset voltages, a correction duration data table is determined; according to the first voltage or the second voltage, and the correction duration data table, the preset duration is determined.

[0062] Optionally, the step of determining a correction time corresponding to a preset voltage includes:

[0063] Under each preset voltage, multiple tests are performed to obtain multiple sets of hardware zero-crossing points and actual zero-crossing points, and the average data of the correction time is used as the correction time corresponding to the preset voltage.

[0064] Optionally, the first detection timing module 11 starts the first timer, including: when it is detected that the electrical signal in the hardware changes from a low level to a high level under the first voltage, starting the first timer.

[0065] Optionally, the second detection timing module 12 starts the second timer, including: when it is detected that the electrical signal in the hardware changes from a low level to a high level under the second voltage, starting the second timer.

[0066] Based on the same technical concept (invention part), the present invention provides a zero-crossing calibration device for household appliances, comprising:

[0067] processor;

[0068] A memory electrically connected to the processor;

[0069] At least one program is stored in the memory and configured to be executed by the processor, and the at least one program is configured to: implement the steps of the zero-crossing calibration method for household appliances as described in any one of the first aspects of the present invention.

[0070] Those skilled in the art will appreciate that the zero-crossing calibration device for household appliances provided in the embodiments of the present invention can be specially designed and manufactured for the desired purpose, or can also include known devices in general-purpose computers. These devices have computer programs stored therein, which are selectively activated or reconstructed. Such computer programs can be stored in a device (e.g., computer) readable medium or in any type of medium suitable for storing electronic instructions and coupled to a bus respectively.

[0071] Compared with the prior art, the present invention has the following beneficial technical effects:

[0072] The zero-crossing calibration device for household appliances provided by the present invention detects the hardware zero-crossing point by a software method, starts a timer when the hardware zero-crossing point occurs, and calibrates the current zero-crossing point of the household appliance at a certain working voltage according to a preset time length determined by empirical data. The method is simple and easy to operate, and can obtain a more accurate current zero-crossing point without adding hardware equipment.

[0073] In an optional embodiment, the present invention provides a zero-crossing calibration device for household appliances, such as Figure 6 As shown, Figure 6 The zero-crossing calibration device 1000 for household appliances shown in the figure comprises: a processor 1001 and a memory 1003. The processor 1001 and the memory 1003 are electrically connected, for example, via a bus 1002.

[0074] Processor 1001 may be a CPU (Central Processing Unit), a general-purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. Processor 1001 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0075] The bus 1002 may include a path to transmit information between the above components. The bus 1002 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 1002 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0076] The memory 1003 can be a ROM (Read-Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (random access memory) or other types of dynamic storage devices that can store information and instructions, or an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read-Only Memory) or other optical disk storage, optical disk storage (including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to these.

[0077] Optionally, the zero-crossing calibration device 1000 of the household appliance may further include a transceiver 1004. The transceiver 1004 may be used for receiving and sending signals. The transceiver 1004 may allow the zero-crossing calibration device 1000 of the household appliance to communicate wirelessly or wired with other devices to exchange data. It should be noted that in actual applications, the transceiver 1004 is not limited to one.

[0078] Optionally, the zero-crossing calibration device 1000 of the household appliance may further include an input unit 1005. The input unit 1005 may be used to receive input digital, character, image and / or sound information, or generate key signal input related to user settings and function control of the zero-crossing calibration device 1000 of the household appliance. The input unit 1005 may include, but is not limited to, one or more of a touch screen, a physical keyboard, a function key (such as a volume control key, a switch key, etc.), a trackball, a mouse, a joystick, a camera, a microphone, etc.

[0079] Optionally, the zero-crossing calibration device 1000 for household appliances may further include an output unit 1006. The output unit 1006 may be used to output or display information processed by the processor 1001. The output unit 1006 may include but is not limited to one or more of a display device, a speaker, a vibration device, and the like.

[0080] Although Figure 6 The zero-crossing calibration device 1000 for household appliances having various devices is shown, but it should be understood that it is not required to implement or possess all the devices shown. More or fewer devices may be implemented or possessed instead.

[0081] Optionally, the memory 1003 is used to store application code for executing the solution of the present invention, and the execution is controlled by the processor 1001. The processor 1001 is used to execute the application code stored in the memory 1003 to implement any zero-crossing calibration method for a household appliance provided in an embodiment of the present invention.

[0082] Based on the same technical concept, the fourth aspect of the present application provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the zero-crossing calibration method for household appliances as described in any one of the first aspects of the present application are implemented.

[0083] It will be appreciated by those skilled in the art that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, altered, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted. Furthermore, the steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

[0084] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0085] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0086] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A zero-crossing calibration method for household appliances, characterized in that: In an alternating current change cycle, the following steps are included: Upon detecting a hardware zero-crossing moment under a first voltage, a first timer is started to count down for a preset time duration corresponding to the first voltage; During the countdown for the preset time corresponding to the current voltage, a hardware zero-crossing moment under the second voltage is detected, and a second timer is started to count down for the preset time corresponding to the second voltage; When the preset time is completed, the interruption time is triggered, and the interruption time is the calibrated current zero-crossing point.

2. The zero-crossing calibration method for household appliances according to claim 1, characterized in that: The preset duration is determined by the following steps: Under a plurality of preset voltages, respectively detecting a hardware zero-crossing point and an actual zero-crossing point under each of the preset voltages; Determining a correction duration corresponding to the preset voltage according to a time difference between the hardware zero-crossing point and the actual zero-crossing point; Determine a correction time data table according to the correction time corresponding to the plurality of preset voltages; The preset duration is determined according to the first voltage or the second voltage and the correction duration data table.

3. The zero-crossing calibration method for household appliances according to claim 2, characterized in that: The step of determining the correction time corresponding to the preset voltage includes: Under each preset voltage, multiple tests are performed to obtain multiple sets of hardware zero-crossing points and actual zero-crossing points, and the average data of the correction time length is used as the correction time length corresponding to the preset voltage.

4. The zero-crossing calibration method for household appliances according to claim 1, characterized in that: The starting the first timer includes: when it is detected that the electrical signal in the hardware changes from a low level to a high level under the first voltage, starting the first timer.

5. The zero-crossing calibration method for household appliances according to claim 1, characterized in that: The starting the second timer includes: when it is detected that the electrical signal in the hardware changes from a low level to a high level under the second voltage, starting the second timer.

6. A zero-crossing calibration device for household appliances, characterized in that: include: A first detection timing module, configured to detect a hardware zero-crossing moment under a first voltage, and start a first timer to count down for a preset time duration corresponding to the first voltage; A second detection timing module is used to detect the hardware zero-crossing moment under the second voltage during the countdown of the preset time corresponding to the current voltage, and start a second timer to count down for a preset time corresponding to the second voltage; The zero-crossing point determination module is used to trigger an interruption moment after the preset time period is completed, and the interruption moment is the calibrated current zero-crossing point.

7. The zero-crossing calibration device for household appliances according to claim 6, characterized in that: The preset duration is determined by the following steps: Under a plurality of preset voltages, respectively detecting a hardware zero-crossing point and an actual zero-crossing point under each of the preset voltages; Determining a correction duration corresponding to the preset voltage according to a time difference between the hardware zero-crossing point and the actual zero-crossing point; Determine a correction time data table according to the correction time corresponding to the plurality of preset voltages; The preset duration is determined according to the first voltage or the second voltage and the correction duration data table.

8. A zero-crossing calibration device for household appliances, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method for zero-crossing calibration of household electrical appliances described in any one of claims 1 to 5 are implemented.

9. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the steps of the zero-crossing calibration method for household appliances described in any one of claims 1 to 5 are implemented.

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