Control method of air treatment equipment

Abstract

The invention relates to the technical field of air conditioning, and discloses a control method of air treatment equipment. The filter screen device of the air treatment equipment comprises a filter screen body used for filtering air; the ultrasonic generator is connected with the filter screen body in a contactable manner so as to transmit vibration energy of the ultrasonic generator to the filter screen body. According to the self-cleaning filter screen device, high-frequency vibration of the ultrasonic generator is used for conducting vibration cleaning on dust attached to the filter screen body, almost no dust remains on the filter screen body, cleaning is thorough, the cleaning efficiency is high, noise is low when the ultrasonic generator works, energy consumption is low, and the use experience of a user can be effectively improved through the self-cleaning filter screen device. The vibration intensity and the vibration frequency of the ultrasonic generator are controlled according to the environment temperature and / or humidity, and the cleaning effect is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a control method for air treatment equipment. Background Art

[0002] Air conditioners and air purifiers, as air treatment equipment, are widely used in homes, hospitals, offices, and other places. However, the filters of existing air treatment equipment are easily contaminated by dust, particulate matter, and other substances during use, resulting in reduced air treatment efficiency and even poor air quality. Filter cleaning often relies on manual disassembly and cleaning or regular replacement, which is cumbersome and costly. Related technologies use reverse airflow cleaning methods, but these methods suffer from incomplete cleaning, high noise levels, and high energy consumption. Summary of the Invention

[0003] In view of this, the present invention provides a control method for air handling equipment to solve the problems of incomplete cleaning, loud noise and high energy consumption in the reverse airflow cleaning method of the filter.

[0004] In a first aspect, the present invention provides a method for controlling an air treatment device, the air treatment device comprising: controller and sensing components; The filter device includes a filter body and an ultrasonic generator contactably connected to the filter body; the ultrasonic generator and the sensor assembly are respectively connected to the controller, and the controller is adapted to receive a monitoring signal from the sensor assembly to control the switching and working state of the ultrasonic generator; The control method includes: Acquiring monitoring data of the sensor component; When the monitoring data meets the filter cleaning condition, the ultrasonic generator (2) is controlled to start vibrating and clean the filter body; Obtaining ambient temperature and / or ambient humidity; When the ambient temperature is greater than the temperature threshold or the ambient humidity is greater than the humidity threshold, the vibration intensity and / or vibration frequency of the ultrasonic generator is controlled and adjusted, and the ultrasonic generator continues to operate until the pressure difference on both sides of the filter body is less than or equal to the pressure threshold, and then the ultrasonic generator is shut down.

[0005] Beneficial Effects: The high-frequency vibrations of an ultrasonic generator vibrate and clean impurities adhering to the filter body, leaving virtually no dust or other residue on the filter, resulting in more thorough and efficient cleaning. Furthermore, the ultrasonic generator operates with low noise and energy consumption. Installing this self-cleaning filter device in air handling equipment can effectively enhance the user experience. In high-temperature environments (e.g., T > 30°C), increasing the vibration intensity maintains effective vibration energy on the filter surface, preventing cleaning failure. High temperatures increase material energy absorption, transmission path losses, impurity adhesion, and weaken the medium's auxiliary effect, significantly attenuating the effective vibration energy on the filter surface. Increasing the vibration intensity is necessary to offset the energy losses in these multiple stages, ensuring that the energy ultimately reaching the filter surface is sufficient to remove impurities and maintain cleaning effectiveness. In high-humidity environments (e.g., relative humidity > 60%), reducing the frequency avoids resonant absorption by water molecules, significantly improving sound wave penetration and cleaning efficiency.

[0006] As an optional embodiment, the controlling and adjusting the vibration intensity or vibration frequency of the ultrasonic generator includes: According to the relationship A=A base +k1·(T-30) adjusts the vibration intensity of the ultrasonic generator, where A is the target vibration intensity of the ultrasonic generator, A base is the basic vibration intensity of the ultrasonic generator, k1 is the vibration intensity adjustment coefficient, and T is the ambient temperature monitored in real time; According to the relationship f=f base -k2·(H-60) adjusts the vibration frequency of the ultrasonic generator, where f is the target vibration frequency of the ultrasonic generator, f base is the basic vibration frequency of the ultrasonic generator, k2 is the vibration frequency adjustment coefficient, and H is the ambient humidity monitored in real time.

[0007] Beneficial Effects: The ultrasonic generator's vibration intensity is adjusted using the aforementioned relationship based on its base vibration intensity and frequency, as well as real-time ambient temperature and humidity monitoring, resulting in more precise regulation. By precisely coupling environmental variables with energy output, the system overcomes the limitations of fixed-parameter operation of the ultrasonic generator, improving cleaning stability, optimizing energy consumption, and enhancing system adaptability. This upgrade from passive regulation to active optimization allows the filter cleaning device to adapt to more complex application requirements.

[0008] As an optional embodiment, after controlling and starting the ultrasonic generator, the method further includes: Obtaining feedback information from the sensor assembly to determine the dirtiness level of the filter body; According to the dirt level, the vibration intensity, vibration frequency and cleaning time of the ultrasonic generator (2) are controlled and adjusted according to a preset algorithm.

[0009] Beneficial effects: The vibration intensity, vibration frequency and cleaning time of the ultrasonic generator are adjusted according to the different dirt levels of the filter body. The targeted cleaning method avoids excessive cleaning that increases energy consumption or incomplete cleaning, thereby improving energy efficiency.

[0010] As an optional implementation, the dirt level is represented by Level, Level∈{1,2,3}; the preset algorithm includes: A=A base +x1·Level+x2·(C VOCs / C VOCs,threshold ), where A is the target vibration intensity of the ultrasonic generator, A base is the basic vibration intensity of the ultrasonic generator, x1 and x2 are vibration intensity adjustment coefficients, C VOCs To monitor VOCs concentration in real time, C VOCs,threshold is the VOCs concentration threshold; f=f base +x3·Level+x4·(C PM2.5 / C PM2.5,threshold ), where f is the target vibration frequency of the ultrasonic generator, f base is the basic vibration frequency of the ultrasonic generator, x3 and x4 are vibration frequency adjustment coefficients, C PM2.5 To monitor PM2.5 concentration in real time, C PM2.5,threshold is the PM2.5 concentration threshold; t=t base +m·Level, where t is the target cleaning time, t base is the basic cleaning time, and m is the pollution level coefficient.

[0011] Beneficial effects: The vibration intensity, vibration frequency and cleaning time of the ultrasonic generator can be adaptively adjusted according to the environment (air quality, ambient temperature and humidity) and the dirt level of the filter body, which can be accurately matched to achieve effective cleaning while saving energy and improving the user experience.

[0012] As an optional implementation manner, when the monitoring data meets the filter cleaning condition, the method includes: The pressure difference between the two sides of the filter body is greater than the pressure threshold; and / or The light transmittance value of the filter body is lower than the preset light transmittance value.

[0013] Beneficial Effects: The pressure threshold is the pressure differential corresponding to the degree of contamination at which the filter requires cleaning. When the pressure differential across the filter exceeds the pressure threshold and / or the filter's light transmittance falls below a preset transmittance value, it indicates the need for filter cleaning. Using the pressure differential to determine filter cleanliness provides rapid judgment and feedback, enabling quick control. Using light transmittance to characterize filter cleanliness also allows for direct judgment.

[0014] As an optional embodiment, the filter body includes: The cylindrical filter screen is provided with the ultrasonic generator on the inner side of the cylindrical filter screen.

[0015] Beneficial Effects: Cylindrical filters offer a larger filtration area within the same space than traditional sheet filters or filter bags, improving filtration efficiency. Due to their large filtration area, when processing the same flow rate, the fluid passes through the filter at a relatively slow rate, resulting in minimal pressure loss. This ensures a low and stable pressure differential, allowing the fluid to maintain good fluidity during filtration, reducing the impact on overall system pressure and facilitating stable system operation. Cylindrical filters are typically compact, small, and lightweight, requiring no additional cages or other complex mounting structures. They are also easy to replace. They are also more compatible with ultrasonic generators, effectively removing accumulated impurities from the filter. When an ultrasonic generator is placed inside a cylindrical filter, its vibration energy is applied directly to the inner surface of the filter (the side that contacts the clean media after filtration) without passing through the outer filter medium (which may contain a large amount of impurities, high viscosity, or corrosiveness). This results in less energy loss and more concentrated vibration intensity. Even if stubborn impurities (such as sticky materials or fine particle scale) adhere to the outer surface of the filter, the high-frequency vibrations from the inner surface can be efficiently transmitted through the filter body to the outer surface, quickly removing the impurities and achieving more effective anti-clogging and cleaning effects. When the ultrasonic generator is placed inside the cylindrical filter, it continuously vibrates the inner surface at high frequency, preventing even small impurities that have passed through the filter from adhering and accumulating inside. This ensures that the inner surface of the filter remains clean, preventing secondary contamination at the source and ensuring stable filtration accuracy. If the ultrasonic generator is placed outside the cylindrical filter, its vibrations may directly disrupt the flow field of the outer filter medium (e.g., disrupting the flow velocity distribution and causing unfiltered impurities to spread excessively outside), thereby affecting filtration efficiency (e.g., uneven flow velocity leading to rapid accumulation of impurities in certain areas). When the filter is installed on the inside, the vibration of the ultrasonic generator mainly acts on the filter body and the clean medium on the inside (which has been filtered and has a very low impurity content), and has little interference with the flow field of the main fluid to be filtered on the outside of the filter. It can keep the medium passing through the filter body smoothly, reduce local pressure fluctuations or decreased filtration efficiency caused by flow field disturbances, and ensure the stable operation of the entire filtration system.

[0016] As an optional embodiment, the ultrasonic generator includes: The annular oscillating portion is distributed at intervals along the axial direction of the cylindrical filter.

[0017] Beneficial Effects: The ultrasonic generator employs multiple circular oscillating sections spaced axially along the cylindrical filter, creating a three-dimensional vibration field that eliminates blind spots and blind areas. Each circular oscillating section covers one circumference of the cylindrical filter. The axial superposition of the vibration energy from these multiple rings creates a 360-degree, three-dimensional vibration field within the filter. This not only ensures uniform vibration along the circumference of the cylindrical filter, but also ensures that the vibration energy is fully applied to different axial locations, ensuring consistent vibration at the top, middle, and bottom. This three-dimensional vibration field specifically addresses the problem of axial buildup at the ends of the cylindrical filter. The superimposed vibrations of the circular oscillating sections simultaneously remove sticky impurities from both ends, preventing hidden blockage caused by localized buildup (i.e., appearing clean on the surface but actually partially clogged at both ends, affecting overall flow). In actual use, contamination of the filter is often uneven, influenced by the fluid inlet direction, gravity, and flow velocity distribution. Impurity levels can vary significantly across different areas of the filter. For example, the bottom may experience more particle accumulation due to gravity, while areas near the inlet may experience a higher concentration of impurities due to the higher flow rate. Multiple ring oscillators are independently controllable, with adjustable power and frequency for each, enabling targeted adjustments based on the level of contamination in each filter zone. This zoned control allows the power of the ring oscillator to be increased when contaminants are concentrated in the annular region at the bottom of the cylindrical filter, while the top region maintains a lower power level. This allows for precise cleaning of heavily polluted areas while avoiding energy waste and strain caused by global high-power vibration, achieving intelligent adaptive energy conservation. When multiple ring oscillators are in operation, the ultrasonic vibration waves from adjacent rings interfere with each other on the filter surface. This means that at overlapping wave crests, the localized vibration intensity is significantly enhanced, producing a more intense cavitation effect. The microfluidics formed by the vibrations in the troughs push against each other, forming annular microjets along the filter surface. This interference-generated microjets actively flush the tiny pores on the filter surface. To address the common problem of pore blockage in cylindrical filters, the microjets penetrate the pores along a circular direction, dislodging trapped impurities rather than simply removing surface impurities, significantly improving filter cleaning efficiency. The inner side of a cylindrical filter is an arc-shaped surface. A single rigid oscillating part or a non-annular design has a limited contact area with the filter, which can easily lead to stress concentration at the contact point. Long-term use may cause cracks in the filter or aperture deformation. The curvature of the annular oscillating part matches the inner curved surface of the filter. With multiple rings distributed axially, vibration energy is transmitted to the cylindrical filter through the entire annular contact surface, resulting in more uniform force. This flexible surface-contact vibration prevents damage to the filter from localized excessive vibration while more efficiently converting vibration energy into vibration of the filter itself (rather than wasting it in rigid collisions). When the clean medium flows inside the filter, the vibration of the multiple annular oscillating parts drives the inner fluid to form a spiral rotational flow along the axial direction. This is because each ring vibration generates radial thrust, which, when superimposed, forms a spiral trajectory.This spiral flow can significantly enhance the self-cleaning ability of the clean media inside. That is, the impurities removed by ultrasound will quickly move to the outlets at both ends of the filter along with the spiral flow, thus preventing the impurities from being suspended inside the filter and then reattaching. This reduces the circulating contamination of impurities in the system and indirectly improves the overall filtration efficiency.

[0018] As an optional embodiment, the filter device further includes: The filter frame is provided with the filter body mounted on the filter frame, and the ultrasonic generator is embedded in the filter frame.

[0019] Beneficial Effects: The ultrasonic generator is embedded within the filter frame, eliminating the formation of a vibration attenuation zone at the edge where impurities accumulate, potentially forming a barrier to accumulating. When the ultrasonic generator is embedded within the filter frame, the frame itself acts as a vibration conductor, evenly transmitting the vibration energy throughout the entire filter, including the edges, completely eliminating blind spots during cleaning. This prevents secondary contamination caused by edge buildup. Because filters typically use flexible filter material, ultrasonic vibrations at frequencies close to their natural frequency can easily cause resonance, potentially causing tearing or pore deformation at high frequencies. The filter frame, being a rigid structure, has a natural frequency much higher than that of the filter body. Therefore, when the ultrasonic generator is embedded within the frame, it constrains the vibration frequency of the filter body. The ultrasonic generator's vibrations are filtered out by the frame, removing any potential resonance-causing noise before being transmitted to the filter body. This maintains a stable, non-resonant vibration state, extending the filter's service life. In addition, the filter frame provides a physical barrier for the generator, preventing the ultrasonic generator from directly contacting the filtered medium. It is less susceptible to failure due to corrosion, impact, or high-temperature aging, and can adapt to harsh environments. If the ultrasonic generator and filter are misaligned during installation, uneven vibration will result; if the frame and filter are loosely assembled, the vibration transmission efficiency will be weakened. To ensure that the filtration and cleaning effects are not affected, repeated debugging by professionals is required. However, with the integrated filter body, filter frame, and ultrasonic generator, there is no need to individually debug the alignment of the components, and even non-professionals can quickly complete the installation or replacement. When the filter frame vibrates, it causes flow field disturbances, enhancing the efficiency of impurity removal. When the frame embedded with the ultrasonic generator vibrates, it simultaneously causes the surrounding fluid to form a disturbed flow field. The high-frequency vibration of the filter frame generates tiny vortices on both the filtered and clean sides of the filter body. These vortices can quickly carry away the stripped impurities toward the discharge port, preventing impurity retention.

[0020] As an optional embodiment, the sensing component includes: A first sensor group is provided at the filter body and is suitable for monitoring the dirtiness of the filter body; The second sensor group is arranged at the air outlet of the air treatment equipment and is suitable for monitoring air quality.

[0021] Beneficial effects: The first sensor group monitors the dirtiness of the filter body as a basis for determining whether the filter body needs to be cleaned; the second sensor group monitors the air quality, which can serve as a basis for adjusting the working parameters of the ultrasonic generator, thereby accurately controlling the self-cleaning process of the filter device and improving control accuracy.

[0022] As an optional implementation manner, the first sensing group includes: A photoelectric sensor for monitoring the light transmittance of the filter body; and / or The pressure sensor is used to monitor the pressure difference between the two sides of the filter body.

[0023] Beneficial effects: The transmittance test can directly reflect the cleanliness status of every part of the filter body through the penetrability of light. Even if there is a tiny accumulation of impurities in a local area, it can be accurately identified. The transmittance monitoring method can accurately locate the position and degree of blockage, avoiding filtration failure caused by local blockage; the cleanliness of the filter body is reflected by the pressure difference on both sides of the filter body, and the feedback is fast. It can also be deeply associated with dynamic response and system energy consumption, becoming a core indicator with multiple functions such as real-time monitoring, risk warning, and energy-saving optimization. It is especially reliable in extreme working conditions and complex systems.

[0024] As an optional implementation manner, the second sensing group includes: Pollutant monitoring sensors, used to monitor the concentration of pollutants in the air; Humidity sensor, used to monitor ambient humidity; Temperature sensor, used to monitor ambient temperature.

[0025] Beneficial effects: Ambient temperature and humidity can significantly affect cleaning efficiency. By monitoring temperature and humidity in real time, cleaning parameters can be adjusted dynamically. For example, in the summer when temperatures are high and humidity is high, the ultrasonic cleaning time can be automatically shortened to avoid over-cleaning or under-cleaning due to fixed parameters. Combined with the monitoring of ambient temperature and humidity, vibration cleaning is upgraded from simple impurity desorption to full-chain pollution control. This is especially effective in reducing the rebound of allergens after cleaning during the allergy season, making it more user-friendly for patients with asthma and rhinitis. Moreover, through the precise matching of environment, pollutants, and cleaning parameters, the air purifier can maintain efficient filtration in complex scenarios (such as kitchens, bathrooms, and pet rooms) while avoiding the problem of the filter becoming a source of pollution due to incomplete cleaning.

[0026] As an optional embodiment, the air treatment equipment further includes: The dust collecting device is arranged below the filter device and collects dust shaken off the filter body.

[0027] Beneficial effect: A dust collection device is provided to promptly collect dust and other impurities shaken off the filter body during ultrasonic cleaning to avoid secondary contamination.

[0028] As an optional embodiment, the filter body is detachably mounted on the air handling equipment.

[0029] Beneficial effects: The filter body is detachable and can be removed from the air handling equipment. The filter body can be taken out separately and connected to an ultrasonic cleaning fluid for better cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic top view of the structure of a filter device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the connection structure between a filter body and an ultrasonic generator of a filter device according to an embodiment of the present invention; Figure 3 This is a structural diagram of an air treatment device according to an embodiment of the present invention; Figure 4 A control flow diagram of a control method for air treatment equipment according to an embodiment of the present invention; Figure 5 A diagram showing the working principle of a control device for an air treatment device according to an embodiment of the present invention; Figure 6 This is a working principle diagram of a data acquisition module of an air treatment device according to an embodiment of the present invention; Figure 7 This is a working principle diagram of the processing judgment module of the air treatment equipment according to an embodiment of the present invention; Figure 8 A working principle diagram of a control execution module of an air treatment device according to an embodiment of the present invention; Figure 9 This is a working principle diagram of a feedback recording module of another air treatment device according to an embodiment of the present invention.

[0032] Description of reference numerals: 1. Filter body; 11. Outer layer; 12. Middle layer; 13. Inner layer; 2. Ultrasonic generator; 21. Ring oscillation unit; 3. Filter frame; 4. Controller; 51. Second sensor group; 52. First sensor group; 6. Dust collection device; 7. The sensor is full of dust. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of the invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention depending on the specific circumstances.

[0036] In view of this, the present invention is proposed.

[0037] The following combination Figures 1 to 9 , describing embodiments of the present invention.

[0038] According to an embodiment of the present invention, on the one hand, Figure 1 and Figure 2 As shown, a filter device is provided, comprising: Filter body 1, used for air filtering; The ultrasonic generator 2 is contactably connected to the filter body 1 so as to transmit the vibration energy of the ultrasonic generator 2 to the filter body 1 .

[0039] The high-frequency vibration of the ultrasonic generator 2 is used to vibrate and clean the impurities attached to the filter body 1. There will be almost no dust or other residues on the filter body 1, and the cleaning is more thorough and efficient. In addition, the ultrasonic generator 2 makes less noise and consumes less energy when working. The air treatment equipment is equipped with this self-cleaning filter device to effectively improve the user experience.

[0040] In some embodiments, the filter body 1 includes: The ultrasonic generator 2 is arranged on the inner side of the cylindrical filter screen.

[0041] Cylindrical filters offer a larger filtration area within the same space than traditional sheet filters or filter bags, improving filtration efficiency. Due to their large filtration area, fluid flows through the filter at a relatively slow rate, minimizing pressure loss when handling the same flow rate. This ensures a low and stable pressure differential, maintaining good fluidity during filtration and minimizing the impact on overall system pressure, contributing to stable system operation. Cylindrical filters are typically compact, small, and lightweight, requiring no additional cages or other complex mounting structures. They are also easy to replace. They are also a better match for ultrasonic generators 2, effectively removing accumulated impurities from the filter. When ultrasonic generator 2 is positioned inside the cylindrical filter, its vibration energy can directly impact the inner surface of the filter (the side in contact with the clean filtered medium) without passing through the outer filtered medium (which may contain a large amount of impurities, high viscosity, or be corrosive). This results in less energy loss and more concentrated vibration intensity. Even if stubborn impurities (such as sticky matter or fine particle scale) adhere to the outer surface of the filter, the high-frequency vibrations from the inner surface can be efficiently transmitted through the filter body 1 to the outer surface, quickly removing the impurities and achieving more effective anti-clogging and cleaning effects. When ultrasonic generator 2 is positioned inside the cylindrical filter, it continuously vibrates the inner surface at high frequency, preventing small impurities that have passed through the filter from adhering and accumulating inside. This ensures that the inner surface of the filter remains clean, prevents secondary contamination at the source, and ensures stable filtration accuracy. If ultrasonic generator 2 is mounted outside the cylindrical filter, its vibrations may directly interfere with the flow field of the outer filtered medium (e.g., disrupting the flow velocity distribution and causing unfiltered impurities to spread excessively outside), thereby affecting filtration efficiency (e.g., uneven flow velocity leading to rapid localized impurity accumulation). When the inner side is installed, the vibration of the ultrasonic generator 2 mainly acts on the filter body 1 and the clean medium inside (which has been filtered and has a very low impurity content), and has little interference with the flow field of the main fluid to be filtered outside the filter. It can keep the medium passing through the filter body 1 smoothly, reduce local pressure fluctuations or decreased filtration efficiency caused by flow field disturbances, and ensure the stable operation of the entire filtration system.

[0042] In some embodiments, the ultrasonic generator 2 comprises: The annular oscillating portion 21 is distributed at intervals along the axial direction of the cylindrical filter.

[0043] The ultrasonic generator 2, by providing multiple annular oscillating sections 21 spaced axially along the cylindrical filter, creates a three-dimensional vibration field, eliminating blind spots and blind areas. Each annular oscillating section 21 covers one circumferential surface of the cylindrical filter. The axial superposition of the vibration energy from these multiple annular sections creates a 360-degree, three-dimensional vibration field within the filter. This not only ensures uniform circumferential vibration of the cylindrical filter, but also allows the vibration energy to be fully applied to different axial locations of the cylindrical filter, ensuring consistent vibration at the top, middle, and bottom. This three-dimensional vibration field specifically addresses the problem of deposits easily forming at the axial ends of the cylindrical filter. The superimposed vibrations of the annular oscillating sections 21 simultaneously remove viscous impurities from both ends of the filter, avoiding hidden blockages caused by localized accumulation (i.e., appearing clean on the surface, but actually partially clogged at both ends, affecting overall flow). During actual use, the contamination of the filter is often uneven due to the influence of the fluid inlet direction, gravity, and flow rate distribution. The amount of impurity adhesion in different areas inside the filter varies greatly. For example, the bottom may deposit more particles due to gravity, and the area near the inlet may be more densely impacted by impurities due to the fast flow rate. The multiple ring oscillating parts 21 can be independently controlled. For example, the power and frequency of each ring oscillating part 21 can be adjusted, and can be adjusted according to the degree of pollution in each area of ​​the filter. This partitioned controllable method can increase the power of the bottom ring oscillating part 21 when there are more impurities in the annular area at the bottom of the cylindrical filter, while the top area maintains low power operation. This can not only accurately remove heavily polluted areas, but also avoid energy waste and excessive fatigue of the filter caused by high-power vibration in the entire area, achieving an intelligent adaptive energy-saving effect. When multiple ring oscillating parts 21 are working, the ultrasonic vibration waves of adjacent rings will form interference on the surface of the filter. That is, at the overlapping peaks, the local vibration intensity is significantly enhanced, which can produce a more intense cavitation effect. The micro-flow fields formed by the vibration in the trough area push each other to form annular micro-jets along the surface of the filter. The microjets generated by this interference can actively flush the tiny pores on the filter surface. For the common problem of pore blockage in cylindrical filters, the microjets penetrate the pores in a circular direction, removing tiny impurities trapped within, rather than simply stripping away surface impurities. This significantly improves filter cleaning performance. The inner surface of a cylindrical filter is an arc-shaped surface. A single rigid oscillating portion or a non-annular design has a limited contact area with the filter, which can easily lead to stress concentration at the contact point. Long-term use can cause cracks or pore deformation in the filter. The curvature of the annular oscillating portion 21 matches the inner curved surface of the filter. With multiple rings distributed axially, vibration energy is transmitted to the cylindrical filter through the entire annular contact surface, resulting in more uniform force distribution. This flexible surface-contact vibration prevents damage to the filter due to localized excessive vibration and more efficiently converts vibration energy into vibration within the filter (rather than wasting it in rigid collisions). When the clean medium inside the filter flows, the vibration of the multiple annular oscillating parts 21 will drive the inner fluid to form a spiral rotating flow along the axial direction. This is because each annular vibration generates a radial thrust, which forms a spiral trajectory after superposition.This spiral flow can significantly enhance the self-cleaning ability of the clean media inside. That is, the impurities removed by ultrasound will quickly move to the outlets at both ends of the filter along with the spiral flow, thus preventing the impurities from being suspended inside the filter and then reattaching. This reduces the circulating contamination of impurities in the system and indirectly improves the overall filtration efficiency.

[0044] In some embodiments, the filter device further comprises: The filter frame 3 , the filter body 1 is installed on the filter frame 3 , and the ultrasonic generator 2 is embedded in the filter frame 3 .

[0045] The ultrasonic generator 2 is embedded within the filter frame 3, eliminating the formation of a vibration damping zone at the edge where the filter body 1 and the filter frame 3 meet, where impurities could accumulate. When the ultrasonic generator 2 is embedded within the filter frame 3, the filter frame 3 itself acts as a vibration conductor, evenly transmitting the vibration energy throughout the filter, including the edges, completely eliminating blind spots during cleaning. This prevents secondary contamination caused by edge buildup. Because filters typically use flexible filter media, ultrasonic vibrations at frequencies close to their natural frequency can easily cause resonance. This can lead to tearing or pore deformation at high frequencies. However, the filter frame 3, being a rigid structure, has a natural frequency much higher than that of the filter body 1. Therefore, when the ultrasonic generator 2 is embedded within the filter frame 3, it constrains the vibration frequency of the filter body 1. The vibrations of the ultrasonic generator 2 are filtered out by the filter frame 3, removing any potential resonance-causing noise before being transmitted to the filter body 1. This ensures that the filter body 1 maintains a stable, non-resonant vibration state, extending its service life. In addition, the filter frame 3 provides a physical barrier for the ultrasonic generator 2, preventing direct contact with the filtered medium. This prevents the ultrasonic generator 2 from failing due to corrosion, impact, or high-temperature aging, making it adaptable to harsh environments. Misalignment between the ultrasonic generator 2 and the filter during installation can lead to uneven vibration. Loose assembly of the filter frame 3 and the filter can weaken the efficiency of vibration transmission. To ensure effective filtration and cleaning, repeated adjustments by professionals are required. However, the integrated design of the filter body 1, filter frame 3, and ultrasonic generator 2 eliminates the need for separate component alignment adjustments, allowing non-professionals to quickly complete installation or replacement. The vibration of the filter frame 3 disrupts the flow field, enhancing impurity removal efficiency. The vibration of the filter frame 3, embedded with the ultrasonic generator 2, simultaneously disrupts the surrounding fluid flow. The high-frequency vibration of the filter frame 3 generates tiny vortices on both the filtered and clean sides of the filter body 1. These vortices can quickly carry removed impurities toward the discharge port, preventing them from being trapped.

[0046] According to an embodiment of the present invention, on the other hand, Figure 3 As shown, an air treatment device is also provided, comprising: Controller 4; Sensing components; The filter device, the ultrasonic generator 2 and the sensor assembly are respectively connected to the controller 4. The controller 4 is suitable for receiving the monitoring signal of the sensor assembly to control the switch and working state of the ultrasonic generator 2.

[0047] Since the air handling equipment includes the filter device of the present invention, it has the same technical effect as the filter device, and will not be described in detail here.

[0048] In some embodiments, the sensing assembly includes: The first sensor group 52 is provided at the filter body 1 and is suitable for monitoring the dirtiness of the filter body 1; The second sensor group 51 is arranged at the air outlet of the air handling equipment and is suitable for monitoring air quality.

[0049] The first sensor group 52 is used to monitor the dirtiness of the filter body 1 as a basis for determining whether the filter body 1 needs to be cleaned; the second sensor group 51 is used to monitor the air quality, which can serve as a basis for adjusting the working parameters of the ultrasonic generator 2, thereby accurately controlling the self-cleaning process of the filter device and improving the control accuracy.

[0050] In some embodiments, the first sensor group 52 includes: A photoelectric sensor for monitoring the light transmittance of the filter body 1; and / or The pressure sensor is used to monitor the pressure difference on both sides of the filter body 1.

[0051] The transmittance test can directly reflect the cleanliness status of every part of the filter body 1 through the penetrability of light. Even if there is a tiny accumulation of impurities in a local area, it can be accurately identified. The transmittance monitoring method can accurately locate the position and degree of blockage to avoid filtration failure caused by local blockage; the cleanliness of the filter body 1 is reflected by the pressure difference on both sides of the filter body 1. The feedback is fast, and it can be deeply associated with dynamic response and system energy consumption, becoming a core indicator with multiple functions such as real-time monitoring, risk warning, and energy-saving optimization. It is especially reliable in extreme working conditions and complex systems.

[0052] In some embodiments, the second sensor group 51 includes: Pollutant monitoring sensors, used to monitor the concentration of pollutants in the air; Humidity sensor, used to monitor ambient humidity; Temperature sensor, used to monitor ambient temperature.

[0053] Ambient temperature and humidity can significantly affect cleaning efficiency. By monitoring temperature and humidity in real time, cleaning parameters can be adjusted dynamically. For example, in the summer when temperatures are high and humidity is high, the ultrasonic cleaning time can be automatically shortened to avoid over-cleaning or under-cleaning due to fixed parameters. Combined with the monitoring of ambient temperature and humidity, vibration cleaning is upgraded from simple impurity desorption to full-chain pollution control. This is especially effective in reducing the rebound of allergens after cleaning during the allergy season, making it more friendly to patients with asthma and rhinitis. Moreover, through the precise matching of environment, pollutants, and cleaning parameters, the air purifier can maintain efficient filtration in complex scenarios (such as kitchens, bathrooms, and pet rooms) while avoiding the problem of the filter becoming a source of pollution due to incomplete cleaning.

[0054] In some embodiments, the air handling device further comprises: The dust collecting device 6 is disposed below the filter device to collect dust shaken off the filter body 1 .

[0055] A dust collecting device 6 is provided to promptly collect dust and other impurities shaken off the filter body 1 during ultrasonic cleaning to avoid secondary contamination.

[0056] In some embodiments, the filter body 1 is detachably mounted on the air handling equipment.

[0057] The detachable installation method of the filter body 1 can also remove the filter device from the air handling equipment, so that the filter body 1 can be taken out separately and connected to an electric ultrasonic cleaning machine for use together with an ultrasonic cleaning liquid for better cleaning effect.

[0058] According to an embodiment of the present invention, on the other hand, Figure 4 As shown, a control method for air handling equipment is also provided, comprising: Acquire monitoring data from sensor components; When the monitoring data meets the filter cleaning conditions, the ultrasonic generator 2 is controlled to start vibrating and cleaning the filter body 1.

[0059] When the filter body 1 has reached a dirty state that requires cleaning, the ultrasonic generator 2 is promptly started to vibrate and clean the filter body 1, thereby achieving automatic cleaning. The control logic is simple and easy to implement.

[0060] In some embodiments, when the monitoring data meets the filter cleaning conditions, it includes: The pressure difference between the two sides of the filter body 1 is greater than the pressure threshold; and / or The light transmittance value of the filter body 1 is lower than the preset light transmittance value.

[0061] The pressure threshold is the pressure differential corresponding to the degree of contamination at which filter body 1 requires cleaning. When the pressure differential across filter body 1 exceeds the pressure threshold, cleaning is necessary. Using pressure differential to determine filter body cleanliness provides rapid judgment and feedback, enabling quick control. Light transmittance is also used to directly characterize filter body cleanliness.

[0062] In some embodiments, after starting the ultrasonic generator 2, the method further includes: Obtaining ambient temperature and / or ambient humidity; When the ambient temperature is greater than the temperature threshold or the ambient humidity is greater than the humidity threshold, the vibration intensity and / or vibration frequency of the ultrasonic generator 2 is controlled and adjusted, and the ultrasonic generator 2 continues to run until the pressure difference on both sides of the filter body 1 is less than or equal to the pressure threshold, and then the ultrasonic generator 2 is shut down.

[0063] In high-temperature environments (e.g., T > 30°C), vibration intensity must be increased to maintain effective vibration energy on the filter surface and avoid cleaning failure. At high temperatures, material energy absorption increases, transmission path losses increase, impurity adhesion strengthens, and the medium's auxiliary effect weakens, resulting in a significant attenuation of the effective vibration energy on the filter body 1. Vibration intensity must be increased to offset energy losses in multiple stages, ensuring that the energy ultimately acting on the filter surface is sufficient to remove impurities and maintain cleaning effectiveness. In high-humidity environments (e.g., relative humidity H > 60%), reducing the frequency can avoid resonant absorption by water molecules, significantly improving sound wave penetration and cleaning efficiency.

[0064] In some embodiments, controlling and adjusting the vibration intensity or vibration frequency of the ultrasonic generator 2 includes: According to the relationship A=A base +k1·(T-30) adjusts the vibration intensity of the ultrasonic generator 2, where A is the target vibration intensity of the ultrasonic generator 2, A base is the basic vibration intensity of the ultrasonic generator 2, k1 is the vibration intensity adjustment coefficient, and T is the real-time monitored ambient temperature; According to the relationship f=f base -k2·(H-60) adjusts the vibration frequency of the ultrasonic generator 2, where f is the target vibration frequency of the ultrasonic generator 2, f base is the basic vibration frequency of the ultrasonic generator 2, k2 is the vibration frequency adjustment coefficient, and H is the ambient humidity monitored in real time.

[0065] Based on the ultrasonic generator's base vibration intensity and frequency, as well as the real-time monitoring of ambient temperature and humidity, the aforementioned relationship is used to adjust the ultrasonic generator's vibration intensity, enabling more precise regulation. By precisely coupling environmental variables with energy output, the limitations of the ultrasonic generator's fixed parameters are overcome, improving cleaning stability, optimizing energy consumption, and enhancing system adaptability. This upgrade from passive regulation to active optimization allows the filter cleaning device to adapt to more complex application requirements.

[0066] In some embodiments, after controlling and starting the ultrasonic generator 2, the method further includes: Obtaining feedback information from the sensor component to determine the dirtiness level of the filter body 1; According to the dirt level, the vibration intensity, vibration frequency and cleaning time of the ultrasonic generator 2 are controlled and adjusted according to the preset algorithm.

[0067] The vibration intensity, vibration frequency and cleaning time of the ultrasonic generator 2 are matched and adjusted according to the different dirt levels of the filter body 1. The targeted cleaning method avoids excessive cleaning that increases energy consumption or incomplete cleaning, thereby improving energy efficiency.

[0068] In some embodiments, the dirt level is represented by Level, Level∈{1,2,3}; the preset algorithm includes: A=A base +x1·Level+x2·(C VOCs / C VOCs,threshold ), where A is the target vibration intensity of the ultrasonic generator 2, A base is the basic vibration intensity of ultrasonic generator 2, x1 and x2 are vibration intensity adjustment coefficients, C VOCs To monitor VOCs concentration in real time, C VOCs,threshold is the VOCs concentration threshold; f=f base +x3·Level+x4·(C PM2.5 / C PM2.5,threshold ), where f is the target vibration frequency of the ultrasonic generator 2, f base is the basic vibration frequency of ultrasonic generator 2, x3 and x4 are vibration frequency adjustment coefficients, C PM2.5 To monitor PM2.5 concentration in real time, C PM2.5,threshold is the PM2.5 concentration threshold; t=t base +m·Level, where t is the target cleaning time, t base is the basic cleaning time, and m is the pollution level coefficient. In one embodiment, t base =10s, m=2s.

[0069] The vibration intensity, vibration frequency and cleaning time of the ultrasonic generator 2 can be adaptively adjusted according to the environment (air quality, ambient temperature and humidity) and the dirt level of the filter body 1, which can be accurately matched to achieve effective cleaning while saving energy and improving the user experience.

[0070] It should be noted that the contamination levels of the filter body 1 include light contamination, moderate contamination, and heavy contamination. In one embodiment, the pressure difference across the filter (filter resistance) ΔR∈[50,100]Pa for light contamination; the filter resistance ΔR∈[100,150]Pa for moderate contamination; and the filter resistance ΔR>150Pa for heavy contamination.

[0071] Figure 5 The working principle of the control device of air handling equipment is given. Figure 6-Figure 9 The working principles of the data acquisition module, processing and judgment module, control execution module and feedback recording module of the air handling equipment are given.

[0072] A specific embodiment of the present invention provides an intelligent air purifier based on ultrasonic vibration, comprising a housing, a filter device, an ultrasonic generator 2, a sensor assembly, and a controller 4. The ultrasonic generator 2 is integrated within the filter frame 3 and generates high-frequency mechanical vibrations (frequency 20-40 kHz, amplitude 5-15 μm) through piezoelectric ceramics. These vibrations directly act on the fiber layer of the filter body 1, detaching attached pollutants. The sensor assembly is used to detect the degree of contamination and air quality within the filter, and includes, but is not limited to, a volatile organic compound (VOC) sensor, a PM2.5 (particulate matter) sensor, a temperature sensor, and a humidity sensor. Volatile organic compounds (VOCs) are important precursors to the formation of secondary pollutants such as fine particulate matter (PM2.5) and ozone. The filter body 1 is a cylindrical filter, comprising an outer layer 11, a middle layer 12, and an inner layer 13. The ultrasonic generator 2 is disposed within the inner layer 13.

[0073] Specifically, the filter body of the filter device adopts a three-layer composite design, with an outer layer of PP cotton (weight 80g / m 2 ) pre-filter large particles, the middle electret melt-blown layer (fiber diameter 0.5μm) adsorbs PM2.5, and the inner layer is loaded with 6 groups of annular ultrasonic generators (diameter 25mm, power 8W / group).

[0074] Controller 4 detects data from the sensor component (such as PM2.5 ≥ 75μg / m 3 or a 30% drop in transmittance), dynamically adjust the start and stop frequencies of the ultrasonic generator 2, and adjust the cleaning cycle (adjustable from 5 to 120 minutes) based on the pollution accumulation curve fitted by historical data to optimize the cleaning effect and energy consumption.

[0075] The frequency range of the ultrasonic generator 2 is 20kHz to 40kHz, and the vibration intensity can be adjusted according to the material of the filter body 1 and the type of pollutant to ensure the cleaning effect while avoiding damage to the filter.

[0076] The sensing component includes a filter pollution detection module and an air quality detection module. The filter pollution detection module determines the degree of pollution by measuring the resistance or pressure difference of the filter. The air quality detection module evaluates the air quality by detecting indicators such as PM2.5, PM10, and VOCs.

[0077] The controller 4 uses a microprocessor or a single chip computer to analyze the sensor data through a preset algorithm and dynamically adjust the working mode of the ultrasonic generator 2, including the adjustment of the cleaning frequency, vibration intensity and duration.

[0078] The air purifier also has a user interface that displays air quality data and filter status, and supports users to manually start or adjust the cleaning mode.

[0079] Placing a dust box below the filter allows dust that falls off the filter to fall into the dust box, preventing it from falling on other parts of the air purifier and affecting its normal operation. At the same time, an infrared dust sensor serving as a dust full sensor 7 is provided in the dust box. The infrared dust sensor is arranged on both sides of the inner wall of the dust box. The sensor can determine the dust content in the dust box. When the dust content reaches a certain level, the sensor signal is transmitted to the control system, which issues a cleaning signal to remind the user to clean the dust in the dust box in time.

[0080] This embodiment achieves efficient cleaning of the filter through ultrasonic vibration, effectively removes particulate matter and pollutants on the filter surface, and improves purification efficiency; by real-time monitoring of the filter pollution level and air quality, the cleaning frequency is dynamically adjusted to avoid energy waste caused by excessive cleaning; through intelligent cleaning, the service life of the filter is extended, the frequency of filter replacement is reduced, and the cost of use is reduced; in addition, the filter device of the present invention has a compact structure, is easy to integrate, and is suitable for various types of air purifiers.

[0081] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by this application.

Claims

1. A control method for air handling equipment, characterized in that: The air treatment equipment includes: Controller (4) and sensor components; A filter device comprises a filter body (1) and an ultrasonic generator (2) contactably connected to the filter body (1); the ultrasonic generator (2) and the sensor assembly are respectively connected to the controller (4), and the controller (4) is suitable for receiving a monitoring signal from the sensor assembly to control the switch and working state of the ultrasonic generator (2); The control method includes: Acquiring monitoring data of the sensor component; When the monitoring data satisfies the filter cleaning condition, the ultrasonic generator (2) is controlled to start vibrating and clean the filter body (1); Obtaining ambient temperature and / or ambient humidity; When the ambient temperature is greater than a temperature threshold or the ambient humidity is greater than a humidity threshold, the vibration intensity and / or vibration frequency of the ultrasonic generator (2) is controlled and adjusted, and the ultrasonic generator (2) is continuously operated until the pressure difference between the two sides of the filter body (1) is less than or equal to a pressure threshold, and then the ultrasonic generator (2) is shut down.

2. The control method according to claim 1, characterized in that: The control adjusts the vibration intensity or vibration frequency of the ultrasonic generator (2), including: According to the relationship A=A base +k1·(T-30) adjusts the vibration intensity of the ultrasonic generator (2), where A is the target vibration intensity of the ultrasonic generator (2), A base is the basic vibration intensity of the ultrasonic generator (2), k1 is the vibration intensity adjustment coefficient, and T is the ambient temperature monitored in real time; According to the relationship f=f base -k2·(H-60) adjusts the vibration frequency of the ultrasonic generator (2), wherein f is the target vibration frequency of the ultrasonic generator (2), f base is the basic vibration frequency of the ultrasonic generator (2), k2 is the vibration frequency adjustment coefficient, and H is the ambient humidity monitored in real time.

3. The control method according to claim 1, wherein: After controlling and starting the ultrasonic generator (2), the method further includes: Obtaining feedback information from the sensor assembly to determine the dirtiness level of the filter body (1); According to the dirt level, the vibration intensity, vibration frequency and cleaning time of the ultrasonic generator (2) are controlled and adjusted according to a preset algorithm.

4. The control method according to claim 3, characterized in that: The dirt level is represented by Level, Level∈{1,2,3}; the preset algorithm includes: A=A base +x1·Level+x2·(C VOCs / C VOCs,threshold ), where A is the target vibration intensity of the ultrasonic generator (2), A base is the basic vibration intensity of the ultrasonic generator (2), x1 and x2 are vibration intensity adjustment coefficients, C VOCs To monitor VOCs concentration in real time, C VOCs,threshold is the VOCs concentration threshold; f=f base +x3·Level+x4·(C PM2.5 / C PM2.5,threshold ), where f is the target vibration frequency of the ultrasonic generator (2), f base is the basic vibration frequency of the ultrasonic generator (2), x3 and x4 are the vibration frequency adjustment coefficients, C PM2.5 To monitor PM2.5 concentration in real time, C PM2.5,threshold is the PM2.5 concentration threshold; t=t base +m·Level, where t is the target cleaning time, t base is the basic cleaning time, and m is the pollution level coefficient.

5. The control method according to claim 1, characterized in that: When the monitoring data meets the filter cleaning condition, it includes: The pressure difference between the two sides of the filter body (1) is greater than a pressure threshold; and / or The light transmittance value of the filter body (1) is lower than a preset light transmittance value.

6. The control method according to claim 1, characterized in that: The filter body (1) comprises: The ultrasonic generator (2) is arranged on the inner side of the cylindrical filter screen.

7. The control method according to claim 6, characterized in that: The ultrasonic generator (2) comprises: A ring oscillating portion (21), wherein a plurality of the ring oscillating portions (21) are distributed at intervals along the axial direction of the cylindrical filter screen.

8. The control method according to claim 1, characterized in that: The filter device also includes: A filter frame (3), the filter body (1) is mounted on the filter frame (3), and the ultrasonic generator (2) is embedded in the filter frame (3).

9. The control method according to claim 1, characterized in that: The sensing component includes: A first sensor group (52) is provided at the filter body (1) and is suitable for monitoring the dirtiness of the filter body (1); The second sensor group (51) is arranged at the air outlet of the air treatment equipment and is suitable for monitoring air quality.

10. The control method according to claim 9, characterized in that: The first sensing group (52) includes: A photoelectric sensor for monitoring the light transmittance of the filter body (1); and / or A pressure sensor is used to monitor the pressure difference between the two sides of the filter body (1).

11. The control method according to claim 9 or 10, characterized in that: The second sensing group (51) comprises: Pollutant monitoring sensors, used to monitor the concentration of pollutants in the air; Humidity sensor, used to monitor ambient humidity; Temperature sensor, used to monitor ambient temperature.

12. The control method according to claim 1, characterized in that: The air treatment equipment further comprises: A dust collecting device (6) is arranged below the filter device and collects dust shaken off the filter body (1).

13. The control method according to claim 1, characterized in that: The filter body (1) is detachably mounted on the air handling equipment.

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