Range hood self-cleaning method and device and electronic equipment

Abstract

The invention relates to a range hood self-cleaning method and device and electronic equipment. The method comprises the following steps: acquiring open-loop rotating speed information, vibration angular speed information, vibration coefficient, motor starting duration information and open-loop voltage amplitude information corresponding to a main motor of the range hood; determining open-loop voltage direction information according to the open-loop rotating speed information, the vibration angular speed information, the vibration coefficient and the motor starting duration information; and controlling an impeller of the range hood to vibrate and rotate based on the open-loop voltage direction information and the open-loop voltage amplitude information. According to the technical scheme provided by the invention, vibration generated by the permanent magnet synchronous motor is utilized, so that the self-cleaning physical cleaning strength of the worm gear structure of the range hood is improved, and a better cleaning effect can be achieved.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to a self-cleaning method, device and electronic equipment for a range hood. Background Technology

[0002] Currently, self-cleaning range hoods on the market use high-temperature steam nozzles and high-pressure water nozzles, relying solely on steam and water jets to clean stains. However, due to the limited size of the water pump in the range hood, the actual spray force is insufficient, resulting in poor cleaning effectiveness. Similarly, heat-melt cleaning range hoods rely on heating the casing to melt grease, but the grease cools down rapidly as the impeller rotates, also proving ineffective. Summary of the Invention

[0003] This application provides a self-cleaning method, apparatus, and electronic device for range hoods, aiming to at least address how to improve the self-cleaning power of the worm gear structure in range hoods in related technologies. The technical solution of this application is as follows:

[0004] According to a first aspect of the embodiments of this application, a self-cleaning method for a range hood is provided, comprising:

[0005] The open-loop rotational speed, vibration angular velocity, vibration coefficient, motor start-up time, and open-loop voltage amplitude information of the main motor of the range hood are obtained; the vibration coefficient is used to adjust the vibration amplitude of the main motor; the main motor is a permanent magnet synchronous motor.

[0006] Based on the open-loop rotational speed information, the vibration angular velocity information, the vibration coefficient, and the motor start-up duration information, the open-loop voltage direction information is determined;

[0007] Based on the open-loop voltage direction information and the open-loop voltage amplitude information, the impeller of the range hood is controlled to vibrate and rotate.

[0008] In one possible implementation, the method further includes:

[0009] High-temperature steam or high-pressure water jets are injected into the impeller.

[0010] In one possible implementation, determining the open-loop voltage direction information based on the open-loop rotational speed information, the vibration angular velocity information, the vibration coefficient, and the motor start-up duration information includes:

[0011] Based on the open-loop speed information and the motor start-up duration information, the first voltage direction information is obtained;

[0012] Based on the vibration angular velocity information and the motor start-up duration information, the sinusoidal information of the rotation angle is obtained;

[0013] Based on the sinusoidal information and the vibration coefficient, the second voltage direction information is obtained;

[0014] Based on the first voltage direction information and the second voltage direction information, the open-loop voltage direction information is obtained.

[0015] In one possible implementation, obtaining the sinusoidal information of the rotation angle based on the vibration angular velocity information and the motor start-up duration information includes:

[0016] Multiply the vibration angular velocity information by the motor start-up duration information to obtain the rotation angle information;

[0017] The sine value of the rotation angle information is taken to obtain the sine information of the rotation angle.

[0018] In one possible implementation, controlling the impeller of the range hood to vibrate and rotate based on the open-loop voltage direction information and the open-loop voltage amplitude information includes:

[0019] Based on the open-loop voltage direction information and the open-loop voltage amplitude information, the vibration information and rotation information of the impeller to be cleaned in the range hood are determined.

[0020] The impeller is controlled to vibrate and rotate based on the vibration information and the rotation information.

[0021] In one possible implementation, after the step of controlling the impeller to vibrate and rotate based on the vibration information and the rotation information, the method further includes:

[0022] Obtain the vibration timing duration;

[0023] If the vibration timing duration is greater than or equal to a first preset duration, the impeller is controlled to reverse at high speed until the high-speed reversal duration is greater than or equal to a second preset duration.

[0024] In one possible implementation, after the step of controlling the impeller to reverse at high speed when the vibration timing duration is greater than or equal to a first preset duration, until the high-speed reversal duration is greater than or equal to a second preset duration, the method further includes:

[0025] The number of repetitions of vibration and rotation of the range hood was obtained;

[0026] If the number of repetitions is less than the preset number of repetitions, then return to obtain the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up time information, and open-loop voltage amplitude information of the main motor of the range hood, and increase the number of repetitions until the number of repetitions is greater than or equal to the preset number of repetitions.

[0027] According to a second aspect of the embodiments of this application, a self-cleaning device for a range hood is provided, comprising: a control system, a permanent magnet synchronous motor, and an impeller; the control system is connected to the permanent magnet synchronous motor; the permanent magnet synchronous motor is located inside the range hood; and the impeller is located around the permanent magnet synchronous motor.

[0028] The control system is used to acquire the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up time information, and open-loop voltage amplitude information of the permanent magnet synchronous motor; it is also used to determine the open-loop voltage direction information based on the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up time information, and open-loop voltage amplitude information; and it is used to control the impeller of the range hood to vibrate and rotate based on the open-loop voltage direction information and the open-loop voltage amplitude information.

[0029] In one possible implementation, the device further includes a volute housing located outside the impeller and the permanent magnet synchronous motor;

[0030] The volute is used to cause the impeller to reverse at high speed under the control of the control system.

[0031] According to a third aspect of the embodiments of this application, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute the instructions to implement the method as described in any one of the first aspects above.

[0032] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:

[0033] Based on the open-loop rotational speed, vibration angular velocity, vibration coefficient, and motor start-up time, the open-loop voltage direction is determined. Using the calculated open-loop voltage direction and amplitude, the impeller of the range hood is controlled to vibrate and rotate. This impeller vibration effectively enhances the physical cleaning power of the range hood's self-cleaning function.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0036] Figure 1 This is a flowchart illustrating a self-cleaning method for a range hood according to an exemplary embodiment.

[0037] Figure 2 This is a schematic diagram illustrating directional information of a self-cleaning method for a range hood according to an exemplary embodiment.

[0038] Figure 3 This is a flowchart illustrating an open-loop voltage direction information calculation method for a self-cleaning method for a range hood according to an exemplary embodiment.

[0039] Figure 4 This is a schematic diagram of the open-loop angle changing over time in a self-cleaning method for a range hood according to an exemplary embodiment. Figure 1 .

[0040] Figure 5 This is a schematic diagram of the open-loop angle changing over time in a self-cleaning method for a range hood according to an exemplary embodiment. Figure 2 .

[0041] Figure 6 This is an overall flowchart illustrating a self-cleaning method for a range hood according to an exemplary embodiment.

[0042] Figure 7 This is a structural diagram of a self-cleaning device for a range hood according to an exemplary embodiment.

[0043] Figure 8 This is a block diagram of an electronic device for a self-cleaning method for a range hood, illustrated according to an exemplary embodiment. Figure 1 .

[0044] Figure 9 This is a block diagram of an electronic device for a self-cleaning method for a range hood, illustrated according to an exemplary embodiment. Figure 2 . Detailed Implementation

[0045] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0047] The term "exemplary" as used herein means "serving as an example, embodiment, or illustration." Any embodiment illustrated herein as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. The term "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more of a plurality, for example, including at least one of A, B, and C, which can represent including any one or more elements selected from the set consisting of A, B, and C.

[0048] The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0049] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed description. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0050] It should be noted that the following diagram illustrates one possible sequence of steps, and it is not strictly required to follow this order. Some steps can be performed in parallel without interdependence. The user information (including but not limited to user device information, user personal information, user behavior information, etc.) and data (including but not limited to data used for display, training data, etc.) involved in this disclosure are all information and data authorized by the user or fully authorized by all parties.

[0051] Figure 1 This is a flowchart illustrating a self-cleaning method for a range hood according to an exemplary embodiment. Figure 1 As shown, it may include the following steps.

[0052] In step S101, the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up time information, and open-loop voltage amplitude information of the main motor of the range hood are obtained.

[0053] In this embodiment, the main motor of the range hood can be a permanent magnet synchronous motor (PMSM). PMSMs can perform precise vector control, and only when the main motor can be vector controlled can it start oscillating in a controllable manner. The open-loop speed and vibration angular velocity information of the main motor can be preset. The open-loop speed information can be 1 rad / s, and the vibration angular velocity information can be 100 rad / s; this application does not limit these settings. The vibration coefficient is used to adjust the vibration amplitude of the main motor. The larger the vibration coefficient, the greater the motor vibration amplitude; however, an excessively large coefficient can cause the motor to become uncontrollable, making the vibration chaotic and random. Therefore, a suitable vibration coefficient must be selected based on actual conditions to allow the motor to vibrate with maximum instantaneous acceleration while preventing it from becoming uncontrollable. The vibration coefficient can be 0.025; this application does not limit this setting. The motor start-up time information can be the time it takes for the PMSM to drive the impeller for one self-cleaning cycle. The open-loop voltage amplitude information can also be preset.

[0054] In one possible implementation, the open-loop speed information, vibration angular velocity information, vibration coefficient information, motor start-up time information, and open-loop voltage amplitude information can be obtained from a database.

[0055] In one possible implementation, before obtaining the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up time information, and open-loop voltage amplitude information of the main motor of the range hood, the user can first activate the self-cleaning start command of the range hood through the LED (Light Emitting Diode) screen on the control system, or by using a mobile APP (Application).

[0056] In step S103, the open-loop voltage direction information is determined based on the open-loop rotational speed information, vibration angular velocity information, vibration coefficient, and motor start-up duration information.

[0057] In the embodiments of this specification, the open-loop voltage direction information can be based on Figure 2 The directional information diagram shown is used for determination. The open-loop voltage vector of the motor during the self-cleaning process can be defined. The open-loop voltage is always applied at the open-loop angle, and its amplitude is An open-loop rotational speed ω1 can be defined for a self-cleaning process. ω1 is a relatively low rotational speed, when the voltage vector... When rotating at a speed of ω1, the impeller can be driven to rotate synchronously. The vibration angular velocity information ω2 and the amplitude coefficient k can be defined. The vibration angular velocity information ω2 and the amplitude coefficient k together determine the frequency and amplitude of the impeller vibration during the self-cleaning process. The following formula can be used to calculate the open-loop voltage direction information:

[0058] θ1=ω1×t+k×sin(ω2×t)

[0059] For specific information on determining the open-loop voltage direction, please refer to... Figure 3 The step S103 may include:

[0060] S201, based on the open-loop speed information and the motor start-up duration information, the first voltage direction information is obtained.

[0061] In this embodiment, the open-loop speed information can be the open-loop rotational speed of the motor. Multiplying the open-loop speed information by the motor start-up duration information yields the first voltage direction information.

[0062] S203, based on the vibration angular velocity information and the motor start-up time information, obtains the sinusoidal information of the rotation angle.

[0063] In this embodiment, the vibration angular velocity information is multiplied by the motor start-up duration information to obtain the rotation angle information; the rotation angle information is then sined to obtain the sine of the rotation angle. The rotation angle information can represent the vibration frequency of the motor's open-loop rotation.

[0064] S205, based on the sinusoidal information and vibration coefficient, obtains the second voltage direction information.

[0065] In this embodiment, the sinusoidal information can be the sinusoidal information of the rotation angle. The vibration coefficient can be preset and can be used to adjust the amplitude of the motor vibration. Multiplying the sinusoidal information of the rotation angle by the vibration coefficient yields the second voltage direction information.

[0066] S207, based on the first voltage direction information and the second voltage direction information, obtain the open-loop voltage direction information.

[0067] In this illustrative embodiment, the first voltage direction information and the second voltage direction information are added together to obtain the open-loop voltage direction information, and the open-loop voltage is always applied at the open-loop angle.

[0068] In one possible implementation, open-loop speed information, vibration angular velocity information, vibration coefficient, and motor start-up time information can be obtained from a database. The obtained open-loop speed information, vibration angular velocity information, vibration coefficient, and motor start-up time information can be transmitted to the control system, which can calculate the open-loop voltage direction information according to a pre-set program.

[0069] In one possible implementation, the calculation of the open-loop voltage direction information can be performed by an open-loop control system. In an open-loop control system, the input signal is unaffected by the output signal. When controlling the motor to vibrate, the open-loop control system does not care about the precise position of the motor rotor; it only needs to ensure that the motor rotor vibrates.

[0070] In step S105, the impeller of the range hood is controlled to vibrate and rotate based on the open-loop voltage direction information and the open-loop voltage amplitude information.

[0071] In this illustrative embodiment, the open-loop voltage direction information can represent the open-loop angle, and the open-loop voltage amplitude information can represent the magnitude of the open-loop voltage. Based on the open-loop voltage direction information and the open-loop voltage amplitude information, the impeller of the range hood vibrates and rotates; macroscopically, the impeller appears to rotate slowly while simultaneously vibrating rapidly. For example... Figure 4 It is a curve showing the change in the direction of the open-loop voltage over time when the impeller of the range hood vibrates and rotates, such as... Figure 4 The horizontal axis is labeled s (second), representing time; the vertical axis is labeled r (rad), representing the direction of the open-loop voltage. Figure 5 This is a curve showing the change in the direction of the open-loop voltage over time under macroscopic conditions when the impeller of a range hood vibrates and rotates, such as... Figure 4 The horizontal axis is labeled s (second), representing time; the vertical axis is labeled r (rad), representing the direction of the open-loop voltage. According to the curve, the impeller vibrated at a small amplitude and high frequency while rotating.

[0072] In one possible implementation, the open-loop voltage amplitude information can be pre-set by the user, and the control system obtains the open-loop voltage amplitude information from a database that stores the open-loop voltage amplitude information.

[0073] In one possible implementation, the vibration and rotation information of the impeller to be cleaned in the range hood are determined based on the open-loop voltage direction information and the open-loop voltage amplitude information; the impeller is then controlled to vibrate and rotate based on the vibration and rotation information.

[0074] In one possible implementation, the control system controls the permanent magnet synchronous motor to vibrate and rotate based on the open-loop voltage direction information and the open-loop voltage amplitude information; there can be a motor rotor between the permanent magnet synchronous motor and the impeller, and the permanent magnet synchronous motor can drive the impeller to vibrate and rotate by the motor rotor.

[0075] In one possible implementation, high-temperature steam or high-pressure water jets can be injected into the impeller before it vibrates and rotates. Alternatively, high-temperature steam or high-pressure water jets can be injected into the impeller simultaneously with its vibration and rotation.

[0076] In one possible implementation, timing can be started when the impeller of the range hood begins to vibrate and rotate, and the vibration duration can be recorded. If the vibration duration is greater than or equal to a first preset duration, the impeller is controlled to reverse at high speed until the high-speed reverse duration is greater than or equal to a second preset duration. After a period of self-cleaning through high temperature and vibration or self-cleaning through water spray and vibration, the dirt can be softened and loosened. A further period of high-speed rotation causes the dirt to be thrown out by centrifugal force and detached from the impeller. When the impeller reverses, due to the design of the centrifugal fan casing, the airflow is significantly reduced because the impeller's rotation direction is opposite to the airflow direction, resulting in less kinetic energy gained by the air and a smaller load on the motor. Therefore, with the same motor input power, a higher rotation speed is achieved in reverse. Higher rotation speeds result in greater centrifugal force and better cleaning effect.

[0077] In one possible implementation, if the high-speed reversal duration is greater than or equal to the second preset duration, the number of repetitions of the range hood's vibration and rotation is obtained; if the number of repetitions is less than the preset number of repetitions, the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up duration information, and open-loop voltage amplitude information of the range hood's main motor are obtained, and the number of repetitions is increased until the number of repetitions is greater than or equal to the preset number of repetitions.

[0078] Figure 6 This is a general flowchart illustrating a self-cleaning method for a range hood according to an exemplary embodiment. (Refer to...) Figure 6This describes the specific process of the range hood's self-cleaning method. After the self-cleaning process begins, either the high-temperature steam nozzle or the high-pressure water nozzle is activated. If it's a high-temperature steam nozzle, high-temperature steam is sprayed onto the impeller; if it's a high-pressure water nozzle, high-pressure water is sprayed onto the impeller. Subsequently, the control system controls the permanent magnet synchronous motor to start impeller vibration and low-speed rotation. The system checks whether the impeller vibration and low-speed rotation duration has reached the first preset duration. If not, the impeller vibration and low-speed rotation continue. If yes, the motor drives the impeller in high-speed reverse rotation, which, since it does no work on the air, can reach maximum speed. The system then checks whether the high-speed reverse rotation duration has reached the second preset duration. If not, the motor drives the impeller in high-speed reverse rotation. If yes, the system checks whether the number of repetitions of vibration and rotation has reached the preset number of repetitions. If not, the number of repetitions is incremented, and the high-temperature steam nozzle and high-pressure water nozzle are activated. If yes, the self-cleaning process ends, completing one self-cleaning cycle for the range hood.

[0079] Figure 7 This is a structural diagram illustrating a self-cleaning device for a range hood according to an exemplary embodiment. (Refer to...) Figure 7 The device may include: a control system 01, a permanent magnet synchronous motor 02, and an impeller 03; the control system 01 is connected to the permanent magnet synchronous motor 02; the permanent magnet synchronous motor 02 is located inside the range hood; the impeller 03 is located around the permanent magnet synchronous motor 02; the control system 01 is used to acquire the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up time information, and open-loop voltage amplitude information corresponding to the permanent magnet synchronous motor 02; it is also used to determine the open-loop voltage direction information based on the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up time information, and open-loop voltage amplitude information; and it is used to control the impeller 03 of the range hood to vibrate and rotate based on the open-loop voltage direction information and the open-loop voltage amplitude information.

[0080] In one possible implementation, the device further includes a volute 04; the volute 04 is located outside the impeller 03 and the permanent magnet synchronous motor 02; the volute 04 is used to reverse the impeller 03 at high speed under the control of the control system 01.

[0081] In one possible implementation, the device further includes a nozzle 05 located on top of the impeller 03 for spraying high-temperature steam or high-pressure water onto the impeller 03.

[0082] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0083] Figure 8 This is a block diagram illustrating an electronic device for a self-cleaning method for a range hood according to an exemplary embodiment. The electronic device may be a terminal, and its internal structure diagram may be as follows: Figure 8 As shown, the electronic device includes a processor, memory, network interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface is used to communicate with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for self-cleaning a range hood. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the device's casing, or an external keyboard, touchpad, or mouse.

[0084] Those skilled in the art will understand that Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the electronic device to which the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0085] Figure 9 This is a block diagram illustrating an electronic device for a self-cleaning method for a range hood according to an exemplary embodiment. The electronic device may be a server, and its internal structure diagram may be as follows: Figure 9 As shown, the electronic device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface is used to communicate with external terminals via a network connection. When the computer program is executed by the processor, it implements a method for self-cleaning a range hood.

[0086] Those skilled in the art will understand that Figure 9 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the electronic device to which the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0087] In an exemplary embodiment, an electronic device is also provided, including: a processor; and a memory for storing processor-executable instructions; wherein the processor is configured to execute the instructions to implement the range hood self-cleaning method as described in the embodiments of this application.

[0088] In an exemplary embodiment, a computer-readable storage medium is also provided, which, when executed by a processor of an electronic device, enables the electronic device to perform the range hood self-cleaning method of this application embodiment. The computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, or optical data storage device, etc.

[0089] In an exemplary embodiment, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to perform the self-cleaning method for a range hood as described in the embodiments of this application.

[0090] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0091] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0092] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A self-cleaning method for a range hood, characterized in that, include: The open-loop rotational speed, vibration angular velocity, vibration coefficient, motor start-up time, and open-loop voltage amplitude information of the main motor of the range hood are obtained; the vibration coefficient is used to adjust the vibration amplitude of the main motor; the main motor is a permanent magnet synchronous motor. Based on the open-loop rotational speed information, the vibration angular velocity information, the vibration coefficient, and the motor start-up duration information, the open-loop voltage direction information is determined; Based on the open-loop voltage direction information and the open-loop voltage amplitude information, the impeller of the range hood is controlled to vibrate and rotate.

2. The method according to claim 1, characterized in that, The method further includes: High-temperature steam or high-pressure water jets are injected into the impeller.

3. The method according to claim 1, characterized in that, The step of determining the open-loop voltage direction information based on the open-loop rotational speed information, the vibration angular velocity information, the vibration coefficient, and the motor start-up duration information includes: Based on the open-loop speed information and the motor start-up duration information, the first voltage direction information is obtained; Based on the vibration angular velocity information and the motor start-up duration information, the sinusoidal information of the rotation angle is obtained; Based on the sinusoidal information and the vibration coefficient, the second voltage direction information is obtained; Based on the first voltage direction information and the second voltage direction information, the open-loop voltage direction information is obtained.

4. The method according to claim 3, characterized in that, The step of obtaining the sinusoidal information of the rotation angle based on the vibration angular velocity information and the motor start-up duration information includes: Multiply the vibration angular velocity information by the motor start-up duration information to obtain the rotation angle information; The sine value of the rotation angle information is taken to obtain the sine information of the rotation angle.

5. The method according to claim 1, characterized in that, The step of controlling the impeller of the range hood to vibrate and rotate based on the open-loop voltage direction information and the open-loop voltage amplitude information includes: Based on the open-loop voltage direction information and the open-loop voltage amplitude information, the vibration information and rotation information of the impeller to be cleaned in the range hood are determined. The impeller is controlled to vibrate and rotate based on the vibration information and the rotation information.

6. The method according to claim 5, characterized in that, After the step of controlling the impeller to vibrate and rotate based on the vibration information and the rotation information, the method further includes: Obtain the vibration timing duration; If the vibration timing duration is greater than or equal to a first preset duration, the impeller is controlled to reverse at high speed until the high-speed reversal duration is greater than or equal to a second preset duration.

7. The method according to claim 6, characterized in that, After the step of controlling the impeller to reverse at high speed when the vibration timing duration is greater than or equal to a first preset duration, until the high-speed reverse duration is greater than or equal to a second preset duration, the method further includes: The number of repetitions of vibration and rotation of the range hood was obtained; If the number of repetitions is less than the preset number of repetitions, then return to obtain the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up time information, and open-loop voltage amplitude information of the main motor of the range hood, and increase the number of repetitions until the number of repetitions is greater than or equal to the preset number of repetitions.

8. A self-cleaning device for a range hood, characterized in that, The device includes a control system, a permanent magnet synchronous motor, and an impeller; the control system is connected to the permanent magnet synchronous motor; the permanent magnet synchronous motor is located inside the range hood; the impeller is located around the permanent magnet synchronous motor; The control system is used to acquire the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up time information, and open-loop voltage amplitude information of the permanent magnet synchronous motor; it is also used to determine the open-loop voltage direction information based on the open-loop speed information, vibration angular velocity information, vibration coefficient, motor start-up time information, and open-loop voltage amplitude information. And for controlling the impeller of the range hood to vibrate and rotate based on the open-loop voltage direction information and the open-loop voltage amplitude information.

9. The apparatus according to claim 8, characterized in that, The device also includes a volute housing; the volute housing is located outside the impeller and the permanent magnet synchronous motor; The volute is used to cause the impeller to reverse at high speed under the control of the control system.

10. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the self-cleaning method for a range hood as described in any one of claims 1 to 7.

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