Air purifier, filter screen cleaning method of air purifier and medium

Abstract

The embodiment of the invention provides an air purifier, a filter screen cleaning method of the air purifier and a medium. The air purifier comprises a filter screen. The first scraping and sweeping device is arranged on the outer side of the filter screen and used for scraping and sweeping the outer side of the filter screen; the ultrasonic device is used for emitting ultrasonic waves to the filter screen, so that the filter screen generates ultrasonic vibration; the second scraping and sweeping device is arranged on the inner side of the filter screen and used for scraping and sweeping the inner side of the filter screen; the dust suction device is used for sucking dust falling from the filter screen; the water spraying device is used for spraying water vapor to the filter screen; and the drying device is used for drying the filter screen after the water spraying device sprays the water vapor to the filter screen. Bidirectional physical cleaning is formed through the first scraping and sweeping device on the outer side and the second scraping and sweeping device on the inner side, dust in the deep layer of the filter screen is loosened and falls off in combination with ultrasonic vibration, the cleaning efficiency is remarkably improved, drying is conducted through the drying device, microorganisms are prevented from breeding in the humid environment, meanwhile, the filtering efficiency of the filter screen is prevented from being affected, and the service life of the filter screen is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of air purifier control, and particularly to an air purifier, a method for cleaning a filter screen of an air purifier, and a storage medium. Background Art

[0002] With the increasingly serious environmental pollution problems, air purifiers have gradually become important devices in families and public places. However, most of the core components of air purifiers, the filter screens, are consumable materials and need to be frequently replaced to ensure good purification quality. However, the cost of replacing the filter screen is high and the price of the filter screen is expensive. Users may feel that the maintenance cost is too high, which affects the use experience. Or, the high frequency of replacing the filter screen may make users feel troublesome and even forget to replace it, resulting in a decline in the purification effect. In order to ensure that the air purifier purchased by users can purify the bad indoor air in time and achieve a good use experience, it is necessary to improve the existing air purifier filter screens on the market.

[0003] For the filter screens of existing air purifiers, after being used for a period of time, dust will accumulate on the filter screens. If not cleaned for a long time, it will affect the purification effect of the air purifier. Summary of the Invention

[0004] In view of the above problems, embodiments of the present invention are proposed to provide an air purifier, a method for cleaning a filter screen of an air purifier, and a storage medium that overcome the above problems or at least partially solve the above problems.

[0005] To solve the above problems, in a first aspect of embodiments of the present invention, an air purifier is provided, including: A filter screen; A first scraping device, arranged outside the filter screen, for scraping the outside of the filter screen; An ultrasonic device, for emitting ultrasonic waves to the filter screen to make the filter screen generate ultrasonic vibrations; A second scraping device, arranged inside the filter screen, for scraping the inside of the filter screen; A dust suction device, for absorbing the dust falling from the filter screen; A water spraying device, for spraying water vapor to the filter screen; A drying device, for drying the filter screen after the water spraying device sprays water vapor to the filter screen.

[0006] Optionally, the air purifier further includes a blower; The blower is used for evacuating the internal air of the air purifier after the ultrasonic device emits ultrasonic waves to the filter screen to make the filter screen generate ultrasonic vibrations, so as to form a pressure difference between the internal air of the air purifier and the external air of the air purifier.

[0007] Optionally, the air purifier further includes a rotating base and a motor; The rotating base, on which the filter screen is arranged, is used to drive the filter screen to rotate, so that the first scraping device and the second scraping device scrape different areas of the filter screen; The motor is used to drive the rotating base to rotate.

[0008] Optionally, the drying device includes a heating device and an infrared device; The heating device is used to generate heat to dry the filter screen; The infrared device is used to emit infrared waves to the filter screen to dry the filter screen.

[0009] Optionally, the first scraping device includes a rotating shaft and a brush arranged on the rotating shaft; The motor meshes with the rotating shaft and the rotating base through gears to drive the rotating base and the first scraping device to rotate.

[0010] According to the second aspect of the embodiments of the present invention, there is provided a method for cleaning a filter screen of an air purifier, which is applied to the air purifier as described in any one of the above, and the air purifier includes a filter screen, a first scraping device, an ultrasonic device, a second scraping device, a dust suction device, a water spraying device and a drying device; the method includes: After the self-cleaning function of the filter screen is turned on, the outer side of the filter screen is scraped by the first scraping device; Ultrasonic waves are emitted to the filter screen by the ultrasonic device to make the filter screen generate ultrasonic vibration; The inner side of the filter screen is scraped by the second scraping device; The dust falling from the filter screen is absorbed by the dust suction device; Water vapor is sprayed onto the filter screen by the water spraying device; After the water spraying device sprays water vapor onto the filter screen, the filter screen is dried by the drying device.

[0011] Optionally, the air purifier further includes a blower; the method further includes: After the ultrasonic device emits ultrasonic waves to the filter screen to make the filter screen generate ultrasonic vibration, the internal air of the air purifier is evacuated by the blower to form a pressure difference between the internal air of the air purifier and the external air of the air purifier.

[0012] Optionally, the air purifier further includes a rotating base; the method further includes: Drive the filter screen to rotate through the rotating base, so that the first scraping device and the second scraping device scrape different areas of the filter screen.

[0013] Optionally, the drying device includes a heating device and an infrared device; drying the filter screen through the drying device includes: Drying the filter screen by heating through the heating device; Emitting infrared waves to the filter screen through the infrared device to dry the filter screen.

[0014] Optionally, the method further includes: Obtain a first air pressure value at the air inlet of the air purifier and a second air pressure value at the air outlet of the air purifier. If the difference between the first air pressure value and the second air pressure value is greater than a threshold difference within a continuous preset time, turn on the filter screen self-cleaning function; Or, obtain a first pollutant content at the air inlet of the air purifier and a second pollutant content at the air outlet of the air purifier. If the accumulation rate of air pollutants on the filter screen is greater than a preset threshold, turn on the filter screen self-cleaning function; the accumulation rate is determined according to the first pollutant content and the second pollutant content; Or, obtain the running duration of the air purifier when the filtering function is turned on. If the running duration is greater than a threshold duration, turn on the filter screen self-cleaning function.

[0015] According to the third aspect of the embodiments of the present invention, an air purifier is provided, including: a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the computer program is executed by the processor, the steps of a filter screen cleaning method of an air purifier as described in any one of the above are implemented.

[0016] According to the fourth aspect of the present invention, a computer-readable storage medium is provided. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, the steps of a filter screen cleaning method of an air purifier as described in any one of the above are implemented.

[0017] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects: An embodiment of the present invention provides an air purifier, a method for cleaning a filter screen of an air purifier, and a medium, including: a filter screen; a first scraping device disposed outside the filter screen for scraping the outside of the filter screen; an ultrasonic device for emitting ultrasonic waves to the filter screen to cause ultrasonic vibration of the filter screen; a second scraping device disposed inside the filter screen for scraping the inside of the filter screen; a dust suction device for sucking dust falling from the filter screen; a water spraying device for spraying water vapor onto the filter screen; and a drying device for drying the filter screen after the water spraying device sprays water vapor onto the filter screen. A two-way physical cleaning is formed by the first scraping device on the outside and the second scraping device on the inside, and the combined ultrasonic vibration loosens and removes the deep-layer dust on the filter screen, significantly improving the cleaning efficiency. The drying device is used for drying to avoid the growth of microorganisms in a humid environment, and at the same time avoid affecting the filtering efficiency of the filter screen and prolong the service life of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a structural diagram of an air purifier provided by an embodiment of the present invention; Figure 2 FIG. is a flowchart of steps of a method for cleaning a filter screen of an air purifier provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0020] For the filter screen of the existing air purifier, after being used for a period of time, dust will accumulate on the filter screen. If it is not cleaned for a long time, it will affect the purification effect of the air purifier. However, the traditional water washing method requires disassembling the filter screen, and after spraying water and drying, it is not thoroughly dried, which is easy to cause the growth of microorganisms.

[0021] One of the core concepts of the embodiment of the present invention is that a two-way physical cleaning is formed by the first scraping device on the outside and the second scraping device on the inside, and the combined ultrasonic vibration loosens and removes the deep-layer dust on the filter screen, significantly improving the cleaning efficiency. The drying device is used for drying to avoid the growth of microorganisms in a humid environment, and at the same time avoid affecting the filtering efficiency of the filter screen and prolong the service life of the filter screen.

[0022] Referring to Figure 1 , a structural diagram of an air purifier provided by an embodiment of the present invention is shown, including: Filter screen 101; The filter screen of the air purifier is its core component, which directly affects the purification effect. It mainly includes a pre-filter for filtering large particles (such as dust, hair, dandruff, etc.) to extend the service life of other filter screens; a high-efficiency particulate air filter (HEPA filter) for removing particles above 0.3 microns, such as PM2.5, pollen, mites, mold spores, etc.

[0023] Air enters through the air inlet of the air purifier. After passing through the filter screen behind the air inlet, the fresh air blows out from the air outlet after passing through the air duct. In the embodiment of the present invention, an integrated sensor is placed at each of the air inlet and the air outlet of the air purifier to collect pollutant data.

[0024] The integrated multi-spectral PM2.5 sensor (0.1 - 10μm particulate matter classification detection), VOC gas sensor array (formaldehyde, benzene series, etc.), differential pressure sensor (monitoring the pressure difference on both sides of the filter screen), and temperature and humidity sensor (environmental parameter compensation) can monitor a variety of air quality indicators in real time. The integrated sensor is connected to the control system of the air purifier, and the data is transmitted to the APP or the control panel through wireless communication technology (such as Wi-Fi or Bluetooth). Users can view the data monitored by the filter screen through the mobile APP or the control panel of the air purifier.

[0025] Pollutants are displayed in color on the display screen. The display effect of the display screen is to scroll and play the status, numerical value, and color of each pollutant. For example: currently, the content of dust PM2.5 is displayed, and different colors are displayed corresponding to the numerical value of this content. After 3 - 5 seconds, the display screen jumps to the content of formaldehyde pollutants, and the corresponding color and numerical value of formaldehyde pollutants are also displayed on the display screen, and so on. Other pollutant numerical values, colors, etc. are displayed by jumping every few seconds.

[0026] After the air purifier is turned on and working, the sensors at the air inlet and the air outlet start to detect the pollutant content before and after the air passes through the filter screen respectively. Different colors of air quality will be displayed corresponding to different detected dust contents. For example, if the detected air quality is excellent, the display screen lights up green; if the detected air quality is medium, the display screen lights up yellow; if the detected air quality is poor, the display screen lights up red.

[0027] The air purifier needs to trigger the self-cleaning mechanism to turn on the self-cleaning function. It is judged whether to trigger the self-cleaning mechanism through the data collected by the integrated sensor. Obtain the air pressure value at the air inlet of the air purifier and the air pressure value at the air outlet of the air purifier. If the difference between the air pressure value before passing through the filter screen and the air pressure value after passing through the filter screen is greater than the threshold difference within a continuous preset time, the self-cleaning mechanism is triggered. For example: the difference between the air pressure value before passing through the filter screen and the air pressure value after passing through the filter screen is greater than 150 Pa continuously for 5 minutes.

[0028] Alternatively, obtain the first pollutant content at the air inlet of the air purifier and the second pollutant content at the air outlet of the air purifier. If the accumulation rate of air pollutants on the filter mesh is greater than the preset threshold, trigger the self-cleaning mechanism; the pollutant accumulation rate is the speed at which air pollutants accumulate inside the device or on the filter mesh during the operation of the air purifier. The accumulation rate is calculated from the first pollutant content, the second pollutant content, and the preset duration. The air pressure value and pollutant content at the air outlet of the air purifier are collected by sensors after the air at the air inlet of the air purifier passes through the filter mesh.

[0029] Alternatively, obtain the operating duration of the air purifier when the filtration function is turned on. If the operating duration is greater than the threshold duration, trigger the self-cleaning mechanism. For example, the air purifier has been operating with the filtration function turned on for more than 72 hours.

[0030] When the air purifier triggers one of the above mechanisms, it will control the air purifier to stop the filtration function and simultaneously activate the self-cleaning function of the filter mesh. The first scraping device 102 is arranged outside the filter mesh and is used to scrape the outside of the filter mesh. The first scraping device refers to the automatic cleaning mechanism in the air purifier for cleaning the filter mesh, mainly including a brush. By mechanically scraping, brushing, or vibrating the brush, large particle pollutants (such as dust and hair) accumulated on the surface of the filter mesh are removed, reducing filter mesh blockage and improving air permeability and purification efficiency. The brush is rotated by a motor to sweep away the dust on the filter mesh.

[0031] After the self-cleaning function of the filter mesh of the air purifier is activated, the first scraping device arranged outside the filter mesh scrapes the outside of the filter mesh up and down. The principle of the downward scraping movement is that it has 4 sections, and the brush positions of each section are not in the same position. When rotating, the first section of the brush is first rotated and exposed. After brushing a certain angle, the first section of the brush retracts and the second section of the brush is exposed, and so on to achieve the scraping movement up and down. The dust and bacteria attached to the surface of the filter mesh are scraped off by the brush.

[0032] In this embodiment, the first scraping device is an automatic cleaning mechanism in the air purification equipment, arranged outside the filter mesh, and is used to periodically or real-time scrape off large particle pollutants such as dust, hair, and pollen attached to the surface of the filter mesh to maintain the air permeability and purification efficiency of the filter mesh. The device mainly consists of a scraping component (such as a scraper or a brush) and a transmission mechanism, and is fixed on the outer frame of the filter mesh. Its position design needs to ensure that the scraping range covers the entire effective filtration area of the filter mesh to avoid cleaning dead corners.

[0033] It can be activated after the self-cleaning function of the filter mesh of the air purifier is turned on, and the motor drives the scraper or the bristles to move up and down along the surface of the filter mesh to physically peel off the attached pollutants.

[0034] An ultrasonic device 103 is used to emit ultrasonic waves to the filter screen, so that the filter screen generates ultrasonic vibrations. An ultrasonic device is a module that uses high-frequency sound waves (usually exceeding 20 kHz) for cleaning, humidifying, or sterilizing, and can be integrated into air purifiers, humidifiers, or independent cleaning devices. Its core principle is to convert electrical energy into mechanical vibrations through a piezoelectric transducer, thereby generating high-frequency ultrasonic energy to achieve various functions. It can include a piezoelectric ceramic ultrasonic generator, etc.

[0035] Cleaning and dust removal by ultrasonic waves is to loosen and shed dust and particulate matter on the surface of the filter screen through high-frequency vibrations, reducing blockages. It is applicable to the primary filter screen of air purifiers or electrostatic dust collection devices, and can clean in a non-contact manner to avoid physical wear.

[0036] Ultrasonic dust removal generates a low-frequency standing wave field, and the periodic vibration of the sound wave causes a small displacement on the surface of the filter screen. The dust particles attached to the filter screen become loose due to inertia (with a large mass and unable to fully follow the vibration of the filter screen), and then switch to high-frequency vibration (such as 80 - 150 kHz). The high-frequency sound wave causes smaller dust particles (micrometer level) to resonate and further detach from the surface of the filter screen. When the wavelength of the ultrasonic wave is too long or too short, it will damage the fiber structure of the filter screen. Therefore, the wavelength generated by the ultrasonic device needs to be controlled within a certain range.

[0037] In the embodiment of the present invention, the ultrasonic device is one of the core self-cleaning modules of the air purifier. It generates high-frequency mechanical vibrations through a piezoelectric ceramic ultrasonic generator. The device mainly consists of a high-frequency signal generator, a piezoelectric transducer array, and a vibration conduction mechanism. The piezoelectric ceramic ultrasonic generator is arranged near the air inlet sensor of the air purifier.

[0038] When performing ultrasonic vibration dust removal, a standing wave field is generated through the piezoelectric ceramic ultrasonic generator, and the generated ultrasonic energy is accurately conducted to the filter screen structure, causing inertial separation of the attached particles. The ultrasonic generator emits 30 s of low-frequency vibration, aiming to loosen the dust particles attached to the filter screen that are not easily sucked off by the vacuum cleaner through low-frequency vibration and separate them from the filter screen. Subsequently, through continuous high-frequency resonance, the dust and particles are vibrated to peel off the deeply embedded particulate pollutants from the filter screen.

[0039] This non-contact cleaning method can not only effectively remove the particles that are not easily scraped and cleaned, but also avoid damage to the filter screen structure caused by physical scraping. Vibration conduction can ensure that the ultrasonic energy is evenly distributed across the entire working surface of the filter screen, eliminating cleaning dead spots and extending the service life of the filter screen. This cleaning method is particularly suitable for the maintenance of precision filter materials such as HEPA composite filters, significantly reducing the frequency of consumable replacement while ensuring the purification efficiency.

[0040] The second scraping device 104 is disposed inside the filter screen and is used to scrape the inside of the filter screen; The second scraping device refers to an automatic cleaning mechanism in an air purifier for cleaning the filter screen, mainly including a brush and a robotic arm. By means of mechanical scraping, brushing or vibrating of the brush, large particle pollutants accumulated inside the filter screen are removed.

[0041] After the first scraping device scrapes off the dust on the surface of the primary filter screen, more or less large particle dust, dust, hair and other dust will remain attached to the surface of the filter screen. At this time, the system will continuously perform in-depth cleaning of the filter screen. The robotic arm is located inside the filter screen and is also provided with a brush for scraping. By scraping the inside of the filter screen, the dust, particulate matter, etc. attached to the inside are separated from the filter screen.

[0042] For example: for in-depth cleaning of the internal HEPA filter fiber layer, the robotic arm can extend to the groove part inside the HEPA filter screen to scrape the dust and small particle pollutants attached deep inside in all directions. Without the scraping of the robotic arm, the dust inside the HEPA filter screen will precipitate after a certain period of time and will be attached to the inside of the HEPA filter screen and is not easily adsorbed out, resulting in poor cleaning efficiency.

[0043] In the embodiment of the present invention, the second scraping device is a key internal cleaning component of the air purifier. It adopts a mechanical structure design of a robotic arm and is fixedly installed inside the filter screen (forming an internal and external collaborative cleaning system with the first scraping device). When performing the scraping operation, the robotic arm drives the brush to perform an up-and-down scraping movement inside the filter screen, which can effectively remove the deep pollutants adsorbed inside the filter screen. This cleaning method is particularly suitable for the maintenance of the inner layer of a multi-layer composite filter screen, solving the technical bottleneck that traditional purifiers can only clean the outer surface of the filter screen.

[0044] The dust suction device 105 is used to absorb the dust falling from the filter screen; The dust suction device is an efficient dust collection module of the air purifier, and adopts a multi-stage negative pressure dust suction technology to realize intelligent filter screen cleaning. This device consists of a vacuum cleaner and a detachable dust collection box. When working, it generates strong suction force, and thoroughly removes the pollutants peeled off by the scraping device through an optimally designed dust suction air duct, ensuring that more than 90% of the falling dust can be quickly captured.

[0045] When the dust suction device works, it forms a synergistic effect with the scraping system: when the first scraping device and the second scraping device complete the dust scraping operation, the dust suction device immediately starts to establish the maximum negative pressure, and sucks the dust falling off the filter screen surface into the dust collection bin through the shortest path. The specially designed anti-backflow structure can prevent secondary dust raising, and the detachable dust collection box is convenient for users to clean.

[0046] After the first scraping device scrapes off the dust and bacteria adhering to the surface of the filter screen with a brush, the vacuum cleaner of the dust suction device sucks the dust and bacteria into the dust collection box to complete the initial cleaning of the filter screen. The robotic arm in the second scraping device drives the brush to scrape the inner side of the filter screen, comprehensively scraping the dust and small particle pollutants adhering to the deep part of the inner side of the filter screen, and adsorbing the scraped pollutants out through the vacuum cleaner of the dust suction device to achieve the cleaning purpose.

[0047] Pollutants such as dust and particulate matter adsorbed by the dust suction device are all adsorbed into the dust collection box. The dust collection box is provided with a monitoring mechanism. The placement method of the dust collection box is upside down, that is, the box cover is downward, and the box cover and the box body are sealed by rubber coating. Under the action of gravity, the dust sucked into the dust collection box accumulates downward. When the accumulated dust exceeds a certain height of the dust collection box, the display screen will prompt the user to clean the dust collection box.

[0048] In the embodiment of the present invention, the dust suction device is the core dust collection component of the air purifier, and adopts the high-efficiency negative pressure dust suction technology to specifically collect and store various particulate pollutants shed during the filter screen cleaning process. This device can generate a strong suction force of up to 18 KPa, and can quickly capture dust, pollen and other particulate matters peeled off from the surface of the filter screen. When working in coordination with the ultrasonic vibration device and the scraping device, this dust suction device can achieve a collection efficiency of more than 95% of the shed pollutants, effectively preventing secondary pollution.

[0049] The water spraying device 106 is used to spray water vapor onto the filter screen; The water spraying device is an important auxiliary cleaning module, which adopts the intelligent control multi-mode water vapor spraying technology and is specifically used for the deep cleaning and maintenance of the filter screen. It mainly includes a nozzle and a water tank. There are a total of 2 water sprayers, which are arranged on the left and right sides of the heating element in the drying device. When spraying water mist, the 360° coverage of the filter screen can be achieved through the rotation of the rotating base.

[0050] After the first scraping device scrapes the filter screen, the ultrasonic device removes dust, and the second scraping device scrapes the filter screen, the filter screen is subjected to water spraying and cleaning treatment. The system includes an intelligent atomizing spraying module, which contains an array of ultrasonic atomizing nozzles. When the water spraying device operates, the nozzle can spray water mist with a droplet diameter of 5-20 μm. The droplet diameter of the nozzle can be adjusted to make the filter screen cleaning cleaner and more efficient, and eliminate static electricity and balance humidity.

[0051] In an embodiment of the present invention, the water spraying device is a filter cleaning module of an air purifier, which uses intelligent atomization technology to evenly spray nano-scale water vapor particles on the surface of the filter. The device consists of a precision water pump, an ultrasonic atomizer, and a porous spraying array. When working, it can convert purified water into ultra-fine water mist and perform three-dimensional spraying on the filter through nozzles. When the water spraying device is started, the generated water mist can effectively soften the caked dust on the filter fiber, making stubborn pollutants easier to be removed by the subsequent scraping device, effectively improving the cleaning efficiency.

[0052] A drying device 107, configured to dry the filter after the water spraying device sprays water vapor on the filter.

[0053] The drying device is a key auxiliary module of the air purifier, which uses intelligent temperature control drying technology to quickly dry the cleaned filter. The device consists of a heating element and an infrared component. The drying device does not use high-temperature drying when heating and drying, and the drying temperature is about between 40 and 50 °C, which is a temperature that will not damage the antibacterial coating of the filter, and at the same time, the drying effect can be achieved.

[0054] After the filter is sprayed with water, the drying device accelerates the filter to emit light and heat, and irradiates the rotating filter in all directions to accelerate the drying of the filter.

[0055] In an embodiment of the present invention, the drying device is an intelligent drying module of the air purifier, which is used to efficiently dry the wet filter after the water spraying device completes the filter cleaning. The device uses constant temperature heating technology to intelligently adjust the working temperature, avoid local overheating and damage to the filter material, and is also equipped with an automatic rotation function of the filter support, which improves the drying efficiency and greatly improves the filter cleaning effect.

[0056] The air purifier further includes a fan; the fan is configured to evacuate the internal air of the air purifier after the ultrasonic device 103 emits ultrasonic waves to the filter 101 to cause the filter to generate ultrasonic vibrations, so as to form a pressure difference between the internal air of the air purifier and the external air of the air purifier.

[0057] The fan is the core power component of the air purifier, which is driven by a high-efficiency brushless DC motor, provides stable and controllable air flow power for the self-cleaning function of the entire filter, and provides negative pressure suction for the dust collection device. The fan is arranged on the top of the air purifier.

[0058] When the filter screen is ultrasonically vibrated by an ultrasonic device to remove large particles, dust and other pollutants by vibration from the surface of the filter screen, and then negative pressure treatment is carried out by a blower, the differential pressure formed between the inside and the outside of the air purifier adsorbs the dust separated from the filter screen and sucks it into the dust collection box. The internal air is subjected to negative pressure treatment, aiming to create an internal and external differential pressure. Due to the principle of gas flow, air will automatically flow from a place with high pressure to a place with low pressure. With this negative pressure environment, using a dust collector to suck it into the dust collection box can ensure cleaner cleaning and higher cleaning efficiency. If only the blower is used for adsorption, there will also be a situation where the corners cannot be sucked up, resulting in poor cleaning effect.

[0059] At the same time, when the drying device dries the filter screen, a negative pressure field is formed by the blower for vacuum negative pressure adsorption. A negative pressure field is formed on the back of the filter screen, which can accelerate the migration of moisture. The moisture formed by the water spraying device is in a fluid state, and the negative pressure field unfolds the moisture, facilitating subsequent drying steps and making the water droplets dry more thoroughly.

[0060] In the embodiment of the present invention, the air purifier further includes a blower assembly. The blower is driven by a brushless DC motor and has an intelligent speed regulation function. When the ultrasonic device is started and applies high-frequency vibration to the filter screen, the blower synchronously enters the high-speed operation mode, forming a stable negative pressure environment inside the air purifier, creating a significant pressure difference between the inside and the outside of the air purifier. This pressure difference has two functions: on the one hand, it accelerates the separation of the pollutants shaken off the filter screen surface by ultrasonic waves, and on the other hand, it promotes the rapid passage of fresh external air through the filter screen, forming an effective self-cleaning air flow cycle.

[0061] During the ultrasonic cleaning process, the blower and the ultrasonic device work together. Through precisely controlled air flow organization, it ensures that the shed pollutants are efficiently directed to the dust collection device, avoiding secondary pollution and achieving efficient cleaning.

[0062] The air purifier further includes a rotating base and a motor; The rotating base is an intelligent azimuth adjustment module of the air purifier, driven by a high-precision stepper motor, and can realize continuous rotation or preset angle positioning of the filter screen of the air purifier. The rotating base is linked with the self-cleaning function of the filter screen during operation and drives the filter screen to rotate continuously to achieve the cleaning of the filter screen.

[0063] The motor is the core driving unit of the air purifier, adopting high-efficiency and energy-saving brushless DC technology, providing accurate and reliable power output for the rotating base.

[0064] The rotating base, on which the filter screen is arranged, is used to drive the filter screen to rotate, so that the first scraping device 102 and the second scraping device 104 scrape different areas of the filter screen; In the embodiment of the present invention, the rotating base adopts an intelligent rotation design, and its core function is to drive the filter screen installed on the base to perform a precisely controllable rotational motion. The base is built-in with a high-precision servo drive system, which can rotate the filter screen to a preset angle. During the cleaning process of the filter screen, the rotating base performs intermittent step rotation according to a preset program, so that the first scraping device and the second scraping device can successively clean all areas of the filter screen in an all-round manner. This sub-region progressive cleaning method can ensure that the surface of the filter screen is covered without dead angles, and the cleaning efficiency is improved compared with the traditional fixed design.

[0065] The rotating base adopts a modular structure design, and is configured with a quick locking mechanism on the upper part, which can complete the installation or disassembly of the filter screen within 3 seconds. When working in cooperation with the ultrasonic device, it can also enhance the cleaning effect through micro-amplitude vibration at a specific frequency, which is the main auxiliary function of the self-cleaning function of the filter screen for air purification.

[0066] At the same time, when drying the filter screen, the motor drives the rotating base to rotate, driving the filter screen to perform centrifugal dehydration and throwing off the water droplets on the surface of the filter screen.

[0067] The motor is used to drive the rotation of the rotating base.

[0068] In the embodiment of the present invention, as the core driving component of the rotating base, the motor adopts advanced servo control technology to achieve precise motion control of the filter screen rotation system. The motor is a three-phase brushless DC motor, driving the rotating base to perform continuous rotary motion. The repeat positioning accuracy that the motor can achieve ensures that the first scraping device and the second scraping device can accurately align with each area of the filter screen to be cleaned.

[0069] In the cleaning work mode of the filter screen, the motor drives the rotating base to move intermittently, rotating 30° and pausing for 10 seconds each time for the scraping device to operate. This ensures uniform cleaning of the filter screen and significantly improves the cleaning efficiency of the filter screen of the air purifier.

[0070] The drying device 107 includes a heating device and an infrared device; The heating device adopts advanced composite heating technology and is the core heating module of the drying device. The heating device is composed of a heating element. The heating device is arranged on the rotating base, and the heating element is designed to be relatively high, with a height equal to the height of the entire filter screen and located on the rotating base. The heating element is designed to be relatively high in order to irradiate the entire filter screen and improve the drying efficiency.

[0071] The infrared device is the core radiation heating module of the drying device, and uses the third-generation semiconductor heating technology to achieve precise penetration drying. This device is composed of an infrared emission unit, which can quickly evaporate the deep moisture of the filter screen. The infrared device is arranged near the heating device on the outer side of the filter screen and operates in a pulsed manner using mid-infrared radiation (heating for 3s / interval for 1s), aiming to avoid damage to the filter screen caused by local overheating.

[0072] The heating device is used for heating to dry the filter screen. In the embodiment of the present invention, the heating device adopts multi-modal intelligent heating technology and is the core functional module to ensure the efficient drying of the filter screen. This device is composed of heating elements, which accelerate the emission of light and heat to the filter screen through surrounding auxiliary heating, and irradiate the rotating filter screen in all directions to accelerate the drying of the filter screen. The heating elements do not use high-temperature drying when heating and drying. The drying temperature is approximately between 40 and 50 °C, which is a temperature that will not damage the antibacterial coating of the filter screen, accelerating the evaporation of moisture to achieve the drying effect, which can not only improve the drying efficiency but also avoid thermal damage to the filter screen material. Through the linkage control with the rotating base, three-dimensional drying of the filter screen in all directions can also be achieved, improving the drying efficiency of the filter screen.

[0073] The infrared device is used to emit infrared waves to the filter screen to dry the filter screen.

[0074] In the embodiment of the present invention, the infrared device adopts advanced directional radiation heating technology and is one of the core components of the filter screen drying system. This device is composed of an infrared emission unit, which can emit mid-infrared rays with a wavelength of 5-20 μm, penetrate deep into the filter screen to achieve molecular resonance heating, and can intelligently adjust the optimal radiation wavelength according to the filter screen material. Through the pulsed radiation technology (heating for 3s / interval for 1s), it can not only ensure the heating efficiency but also avoid local overheating damage to the filter material. Compared with the single heating method, it can shorten the drying time, and the drying effect on the filter screen is significantly better than the traditional hot air drying method.

[0075] An additional drying step, such as the infrared device drying the filter screen, is to completely dry the water droplets, because directly drying the water droplets easily forms water stains, which has a greater impact on the surface appearance of the filter screen and affects the user experience. This step aims to eliminate the water stains formed by the residual water droplets that have not been dried in time.

[0076] The first scraping device 102 includes a rotating shaft and a brush provided on the rotating shaft. The first scraping device adopts a rotating brush sweeping structure design and is mainly composed of a rotating shaft and a highly efficient cleaning brush. The rotating shaft of the first scraping device has 4 sections, and the brush positions of each section are not in the same position. When rotating, the first section of the brush is first rotated out. After brushing a certain angle, when the first section of the brush goes in, the second section of the brush is exposed, and so on to achieve scraping in the up and down positions. Thus, the up and down scraping of the filter screen can be realized.

[0077] The motor meshes with the rotating shaft and the rotating base through gears to drive the rotation of the rotating base and the first scraping device 102.

[0078] When the self-cleaning function of the filter screen is turned on, the motor meshes the first scraping device and the rotating chassis through gears, and realizes different rotational speed controls according to different transmission ratios. The rotating base rotates slowly, and the first scraping device at the edge scrapes up and down at a certain speed.

[0079] In the embodiment of the present invention, the motor realizes power distribution through a precision gear transmission system, and adopts a double-output shaft design to simultaneously drive the coordinated movement of the rotating base and the first scraping device. The power is distributed to the rotating shaft of the first scraping device by a synchronous belt drive, and different rotational speed controls are realized according to different transmission ratios. When the rotating base rotates, the scraping device correspondingly completes the self-cleaning action of rotation. The speed ratio between the two strictly maintains a certain optimized relationship, which can effectively improve the cleaning efficiency of the filter screen.

[0080] The embodiment of the present invention provides an air purifier, including: a filter screen; a first scraping device arranged outside the filter screen for scraping the outside of the filter screen; an ultrasonic device for emitting ultrasonic waves to the filter screen to cause ultrasonic vibration of the filter screen; a second scraping device arranged inside the filter screen for scraping the inside of the filter screen; a dust suction device for sucking the dust falling from the filter screen; a water spraying device for spraying water vapor onto the filter screen; and a drying device for drying the filter screen after the water spraying device sprays water vapor onto the filter screen. Through the two-way physical cleaning formed by the first scraping device on the outside and the second scraping device on the inside, combined with the ultrasonic vibration to loosen and shed the deep-layer dust of the filter screen, the cleaning efficiency is significantly improved. The drying device is used for drying to avoid the growth of microorganisms in a humid environment, and at the same time avoid affecting the filtering efficiency of the filter screen and prolong the service life of the filter screen.

[0081] It should be noted that for the embodiments of the present invention, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the embodiments of the present invention are not limited by the described action sequence, because according to the embodiments of the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential for the embodiments of the present invention.

[0082] Refer to Figure 2 , which shows a step flow chart of a filter screen cleaning method provided by an embodiment of the present invention, applied to the air purifier as described in any one of the above. The air purifier includes a filter screen, a first scraping device, an ultrasonic device, a second scraping device, a dust suction device, a water spraying device, and a drying device; the method includes: Step 201, after enabling the self-cleaning function of the filter screen, use the first scraping device to scrape the outer side of the filter screen; Step 202, emit ultrasonic waves to the filter screen through the ultrasonic device to cause ultrasonic vibration of the filter screen; Step 203, use the second scraping device to scrape the inner side of the filter screen; Step 204, use the dust suction device to absorb the dust falling from the filter screen; Step 205, spray water vapor to the filter screen through the water spraying device; Step 206, after the water spraying device sprays water vapor to the filter screen, dry the filter screen through the drying device.

[0083] In some embodiments, the air purifier further includes a fan; the method further includes: After the ultrasonic device emits ultrasonic waves to the filter screen to cause ultrasonic vibration of the filter screen, evacuate the internal air of the air purifier through the fan to form a pressure difference between the internal air and the external air of the air purifier.

[0084] In some embodiments, the air purifier further includes a rotating base; the method further includes: Drive the filter screen to rotate through the rotating base so that the first scraping device and the second scraping device scrape different areas of the filter screen.

[0085] In some embodiments, the drying device includes a heating device and an infrared device; the step of drying the filter screen through the drying device includes: Dry the filter screen by heating through the heating device; Emit infrared waves to the filter screen through the infrared device to dry the filter screen.

[0086] In some embodiments, the method further includes: Obtain a first air pressure value at the air inlet of the air purifier and a second air pressure value at the air outlet of the air purifier. If the difference between the first air pressure value and the second air pressure value is greater than a threshold difference within a continuous preset time, then enable the self-cleaning function of the filter screen; Or, obtain a first pollutant content at the air inlet of the air purifier and a second pollutant content at the air outlet of the air purifier. If the accumulation rate of air pollutants on the filter screen is greater than a preset threshold, then enable the self-cleaning function of the filter screen; the accumulation rate is determined according to the first pollutant content and the second pollutant content; Alternatively, obtain the operation duration of the air purifier when the filtering function is turned on. If the operation duration is greater than the threshold duration, turn on the self-cleaning function of the filter screen.

[0087] An embodiment of the present invention provides a method for cleaning a filter screen of an air purifier, including: after turning on the self-cleaning function of the filter screen, use the first scraping device to scrape the outer side of the filter screen; emit ultrasonic waves to the filter screen through the ultrasonic device to make the filter screen generate ultrasonic vibrations; use the second scraping device to scrape the inner side of the filter screen; use the dust suction device to absorb the dust falling from the filter screen; spray water vapor to the filter screen through the water spraying device; after the water spraying device sprays water vapor to the filter screen, dry the filter screen through the drying device. A two-way physical cleaning is formed by the first scraping device on the outer side and the second scraping device on the inner side, and the combined ultrasonic vibration loosens and removes the deep-layer dust on the filter screen, significantly improving the cleaning efficiency. The drying device is used for drying to avoid the growth of microorganisms in a humid environment, and at the same time avoid affecting the filtering efficiency of the filter screen and prolong the service life of the filter screen.

[0088] For the method embodiment, since it is basically similar to the embodiment of the present invention, the description is relatively simple. For related parts, refer to the partial description of the method embodiment.

[0089] An embodiment of the present invention further provides an air purifier, including: a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the computer program is executed by the processor, it implements each process of the above-mentioned embodiment of the method for cleaning a filter screen of an air purifier, and can achieve the same technical effects. To avoid repetition, it will not be described here again.

[0090] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements each process of the above-mentioned embodiment of the method for cleaning a filter screen of an air purifier, and can achieve the same technical effects. To avoid repetition, it will not be described here again.

[0091] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0092] Those skilled in the art should understand that the embodiments of the present invention can be provided as methods, apparatuses, or computer program products. Therefore, the embodiments of the present invention can take the form of all-hardware embodiments, all-software embodiments, or embodiments combining software and hardware aspects. Moreover, the embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) that contain computer-usable program code.

[0093] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing terminal devices to generate a machine, such that the instructions executed by the processors of the computer or other programmable data processing terminal devices generate means for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0094] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0095] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, such that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable terminal device provide steps for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0096] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0097] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or terminal device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0098] The above has introduced in detail an air purifier and a method for cleaning the filter of an air purifier provided by the present invention. Specific examples are used in this text to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An air purifier, characterized in that, Comprising: Filter screen; A first scraping device, disposed outside the filter screen, for scraping the outside of the filter screen; An ultrasonic device, for emitting ultrasonic waves to the filter screen to cause the filter screen to generate ultrasonic vibrations; A second scraping device, disposed inside the filter screen, for scraping the inside of the filter screen; A dust suction device, for sucking the dust falling from the filter screen; A water spraying device, for spraying water vapor to the filter screen; A drying device, for drying the filter screen after the water spraying device sprays water vapor to the filter screen; A blower, for evacuating the internal air of the air purifier after the ultrasonic device emits ultrasonic waves to the filter screen to cause the filter screen to generate ultrasonic vibrations, so as to form a pressure difference between the internal air of the air purifier and the external air of the air purifier.

2. The air purifier according to claim 1, characterized in that, The air purifier further includes a rotating base and a motor; The rotating base, on which the filter screen is disposed, for driving the filter screen to rotate, so that the first scraping device and the second scraping device scrape different areas of the filter screen; The motor, for driving the rotating base to rotate.

3. The air purifier according to claim 1, characterized in that, The drying device includes a heating device and an infrared device; The heating device, for generating heat to dry the filter screen; The infrared device, for emitting infrared waves to the filter screen to dry the filter screen.

4. The air purifier according to claim 2, characterized in that, The first scraping device includes a rotating shaft and a brush disposed on the rotating shaft; The motor meshes with the rotating shaft and the rotating base through gears to drive the rotating base and the first scraping device to rotate.

5. A method for cleaning the filter of an air purifier, characterized in that, Applied to the air purifier according to any one of claims 1-4, the air purifier includes a filter screen, a first scraping device, an ultrasonic device, a second scraping device, a dust suction device, a water spraying device, a drying device and a blower; the method includes: After the self-cleaning function of the filter screen is turned on, scrape the outside of the filter screen through the first scraping device; Emit ultrasonic waves to the filter screen through the ultrasonic device to cause the filter screen to generate ultrasonic vibrations; Scrape the inside of the filter screen through the second scraping device; Absorb the dust falling from the filter screen through the dust suction device; Spray water vapor to the filter screen through the water spraying device; After the water spraying device sprays water vapor to the filter screen, dry the filter screen through the drying device; After the ultrasonic device emits ultrasonic waves to the filter screen to cause the filter screen to generate ultrasonic vibrations, evacuate the internal air of the air purifier through the blower, so as to form a pressure difference between the internal air of the air purifier and the external air of the air purifier.

6. The method for cleaning the filter of an air purifier according to claim 5, characterized in that, The air purifier further includes a rotating base; the method further includes: Drive the filter screen to rotate through the rotating base, so that the first scraping device and the second scraping device scrape different areas of the filter screen.

7. The method for cleaning the filter of an air purifier according to claim 5, characterized in that, The drying device includes a heating device and an infrared device; the drying the filter screen through the drying device includes: Generate heat through the heating device to dry the filter screen; An infrared wave is emitted to the filter through the infrared device to dry the filter.

8. The method for cleaning the filter of an air purifier according to claim 5, characterized in that, The method further includes: Obtaining a first air pressure value at the air inlet of the air purifier and a second air pressure value at the air outlet of the air purifier. If the difference between the first air pressure value and the second air pressure value is greater than a threshold difference within a continuous preset time, the filter self-cleaning function is turned on; Or, obtaining a first pollutant content at the air inlet of the air purifier and a second pollutant content at the air outlet of the air purifier. If the accumulation rate of air pollutants on the filter is greater than a preset threshold, the filter self-cleaning function is turned on; the accumulation rate is determined according to the first pollutant content and the second pollutant content; Or, obtaining the running duration of the air purifier when the filtering function is turned on. If the running duration is greater than a threshold duration, the filter self-cleaning function is turned on.

9. An air purifier, characterized in that, Comprising: A processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the computer program is executed by the processor, the steps of a method for cleaning a filter of an air purifier according to any one of claims 5-8 are implemented.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, the steps of a method for cleaning a filter of an air purifier according to any one of claims 5-8 are implemented.

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