Nanofiber Based Air Filtration in HVAC Systems

A nanofiber air filter material with enhanced filtration efficiency and resistance, achieved through a novel preparation method that integrates non-woven fabric, nanofiber filter layer, and support layer. The material combines a non-woven substrate with a nanofiber filter layer and a support layer, then combines them through ultrasonic welding. This approach enables the creation of ultra-efficient air filters with high porosity and controlled pore size, while maintaining the structural integrity of the non-woven substrate. The nanofiber filter layer is prepared using silk technology, which enables precise control over the fiber structure and porosity. The combination of these components results in a filter material with significantly improved filtration efficiency compared to conventional materials.

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Air filtration device for HVAC systems with improved indoor air quality and reduced energy consumption through the use of a specialized electrostatic precipitator air filter. The filter captures ultrafine particles, allergens, and airborne pollutants that conventional filters may miss. The electrostatic precipitator filter has a rigid frame, filter media restrained, and high-efficiency media to enhance filtration efficiency and reduce maintenance needs compared to traditional filters.

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Biodegradable filter media for HVAC applications that can be fully composted after use. The filter consists of biodegradable base media and a biodegradable nanofiber layer made by electrospinning. The nanofiber layer is formed from biodegradable polymers like PCL, PLA, and PHA. The filter has a filtration efficiency of at least MERV 11. The biodegradable components allow the filter to break down in composting environments, reducing waste compared to conventional HVAC filters with non-biodegradable parts.

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Air filter material with enhanced electrostatic properties for maintaining filtration efficiency even at reduced static forces. The material comprises a support layer and nanoweb layer, where the support layer is fabricated through differential pressure calendaring and the nanoweb layer is produced through melt blowing of thermoplastic polymer raw materials. The nanoweb layer provides high surface area and electrostatic charge density, while the support layer enhances filter stability under reduced electrostatic conditions.

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A non-woven air conditioner filter screen with enhanced filtering performance through nanofiber technology. The screen features a nanofiber layer with a unique antibacterial coating, allowing it to effectively capture airborne contaminants while maintaining high airflow efficiency. The nanofiber layer's high surface area-to-mass ratio enables superior filtration capabilities, particularly against bacteria and viruses, while the antibacterial coating prevents the growth of microorganisms. This design enables improved air quality control in air-conditioning systems.

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Nanofiber filter that combines VOC removal and pathogen elimination capabilities through a unique metal-doped nano-absorbent structure. The filter comprises a base layer of polymer non-woven membrane and a nanofiber layer containing hydrophobic synthetic polymer with metal-doped nano-active absorbing particles. The metal ions in the particles activate against VOCs and pathogens, while maintaining air flow. The filter is manufactured using an electrospinning process, with the metal-doped nano-absorbent particles achieving a weight concentration of 0.2-5% of the organic solvent.

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A nanofiber air filter medium with enhanced adsorption performance, featuring a composite nanofiber filtration layer that combines multiple nanometer composite nanofiber layers. The medium comprises a support material and a composite nanofiber filtration layer, where the composite nanofiber layers are deposited and stacked on the support material surface. The nanometer composite nanofiber layers comprise first nano-powder composite nanofiber, second nano-powder composite nanofiber, and third nano-powder composite nanofiber. The composite nanofiber filtration layer achieves superior adsorption performance, including formaldehyde adsorption efficiency greater than 95%, 0.3 μm powder dust filtration efficiency greater than 90% at a 5.3 cm/sec flow rate, and pressure loss less than 7 mmH2O.

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A nanofiber filter that achieves both high dust collection efficiency and low differential pressure characteristics. The filter comprises nanofibers with pores formed through entangled nanofiber yarns, where the pores are created by the sacrificial particles incorporated into the fiber yarn during spinning. These particles selectively etch and form pores in the fiber yarn, allowing the filter to achieve high dust collection efficiency while maintaining low differential pressure. The sacrificial particles are incorporated into the yarn during the spinning process, and the filter is then treated with an etching solution to selectively remove them, creating the desired pore structure.

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Washable HVAC filter media comprising a nanofiber layer disposed between a pre-filter layer comprising meltblown fibers and a nonwoven layer. The media achieves initial filtration efficiency of at least MERV 11 as measured according to the ASHRAE 52.2 standard. The media comprises a pre-filter layer with a basis weight of 20 to 40 gsm, a nonwoven layer with a basis weight of 20 to 40 gsm, and a nanofiber layer with a filtration efficiency of at least MERV 9, MERV 10, MERV 11, MERV 12, MERV 13, MERV 14, MERV 15, MERV 16, or MERV 17.

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A filter medium and composite filter comprising the same material that maintains high filtration efficiency even after prolonged use. The medium comprises electrostatically treated fibers that adsorb dust particles, with the treatment process maintaining electrostatic force. The medium is combined with a nanofiber web that accumulates on one surface, forming a composite filter. The nanofiber web has a specific pore size and density, while the medium maintains its electrostatic properties. This combination enables long-term performance without compromising filtration efficiency, making it suitable for industrial applications where filter media life is critical.

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A nanofiber filter material that significantly improves air filtration efficiency while maintaining lower resistance compared to conventional ultra-fine glass fiber filters. The material achieves this through a novel nanofiber structure that combines the high surface area of nanofibers with controlled slip effects during airflow. This unique nanofiber architecture enables effective dust capture while maintaining optimal gas flow characteristics, thereby reducing energy consumption and noise in air filtration systems. The material's performance surpasses that of ultra-fine glass fiber filters in terms of filtration efficiency and resistance, while maintaining a comparable dust holding capacity.

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A high-performance air filter comprising woven fabric and nanofiber filaments. The filter structure incorporates the fine fiber material of the present invention, which is formed on the filter substrate and adheres to the filter substrate. This unique nanofiber material provides enhanced filtration capabilities through its unique surface properties.

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Air filter, mask, and air purifier that utilize advanced filter technologies beyond conventional melt-blown materials. The filter comprises a filter layer comprising a porous matrix of nanofibers with diameters ranging from 10 to 1000 nm, combined with a functional layer comprising a nanostructured material that enhances both filtration and adsorption properties. This dual-layer architecture enables the filter to maintain optimal performance across a wide range of operating conditions, including high temperatures and humidity, while maintaining its functional integrity.

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Air conditioner with integrated dust removal and humidity management. The system features a nano-filter assembly in the control zone, where air is filtered as it enters the room. The assembly includes multiple nanofibers that capture microscopic dust particles, while also incorporating a humidity management system to maintain optimal indoor conditions. The system integrates with conventional air conditioning components, with the nano-filter assembly positioned between the filter and supply blower. The assembly includes a cleaning mechanism that utilizes water to maintain the nanofibers, ensuring continuous dust capture.

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Nanofiber sheet assemblies that combine mechanical durability with gas permeability. The assemblies feature nanofibers with precisely controlled bundle spacing and diameter, achieved through controlled shrinkage of the non-fixed nanofiber sheet during exposure to water and organic solvent droplets. This controlled shrinkage enables the formation of uniform nanofiber bundles with consistent gap sizes, enabling gas filtration while maintaining mechanical integrity. The assemblies exhibit superior gas permeability compared to conventional nanofiber sheets, with high gas transmission rates and minimal particle retention.

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A nanofiber filter for automotive air conditioning systems that combines high filtration efficiency with improved stability and resistance. The filter comprises a nanofiber membrane comprising a substrate support layer, nanofiber layer, and non-woven protective layer, where the nanofiber layer has an average diameter between 50-300 nm and thickness less than 50 um. The nanofiber membrane is prepared through electrospinning using a solvent system that enables controlled fiber diameter and thickness. The nanofiber membrane is then integrated into a support structure, creating a stable and durable filter element.

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Air filter with a cellulose nanofiber-based adsorbent that can be regenerated at lower temperatures compared to traditional silica gel-based filters. The filter comprises cellulose nanofibers with modified hydroxyl groups that enable desorption of water molecules at temperatures below 100°C. The cellulose nanofibers are produced through freeze-drying of cellulose nanofiber dispersion, resulting in a material with high surface area and adsorption capacity. The filter structure features a partitioned airflow system with cellulose nanofiber-filled channels, allowing efficient gas exchange while maintaining structural integrity.

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A nanomaterial for high-efficiency air filtration that improves the mechanical strength of nanofiber filters to prevent pore collapse. The nanomaterial is made by randomly dispersing beads with a diameter of 2-20 microns along the nanofibers as they are being spun. These beaded nanofibers are then deposited to create a randomly interwoven network with 3D pores. The beads support the nanofibers and prevent the pores from collapsing during use.

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A filter material for high-efficiency, energy-saving, environmentally friendly, and healthy air conditioners that achieves these goals through a novel combination of materials and design. The filter material comprises a matrix of nanoscale, porous carbon nanotubes and zeolites, combined with a thin layer of graphene oxide, all integrated into a single, ultra-efficient filter element. This hybrid structure enables unparalleled air filtration performance while minimizing energy consumption and environmental impact.

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Electret nanofiber filter material for HVAC systems that combines enhanced filtration performance with improved stability and cost-effectiveness. The material is prepared through a novel electrospinning process that rapidly cools and solidifies polymer-dissolved liquid mixtures at the fiber exit, creating a permanent electret structure. The process incorporates a constant-rate release system that precisely controls the cooling and solidification process, ensuring uniform charge distribution and fiber alignment. This approach eliminates the conventional issues of charge dissipation and fiber degradation associated with traditional electret preparation methods. The resulting electret nanofiber filter material exhibits superior filtration efficiency while maintaining low pressure resistance compared to conventional melt blown filter materials.

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Defogging filter for air conditioning systems that effectively removes fine particle emissions from outside air before they enter the system. The filter comprises a frame assembly with gauze mounting areas, a gauze assembly with electrospun nanofilm, and a frame assembly with side strips that sequentially connect to the gauze assembly. The gauze assembly contains a gauze material and a nanofilm coating, while the side strips provide structural support. This innovative design enables efficient removal of airborne pollutants before they pass through the filter, ensuring clean indoor air circulation and preventing indoor air pollution.

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Automotive air conditioning filter technology that achieves enhanced air quality while maintaining high filtration efficiency. The filter comprises a nano-fiber membrane integrated with a substrate support layer and a protective layer. The nano-fiber layer is specifically engineered to have an average diameter of 50 nm and a thickness of less than 50 μm, ensuring optimal filtration performance while maintaining mechanical integrity. This innovative composite structure enables superior air conditioning system performance without compromising filter longevity.

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Air conditioning filter element and vehicle air conditioner that achieve high filtration efficiency while maintaining low resistance. The filter element comprises a base layer of non-woven fabric and a melt-blow nanofiber layer, where the nanofibers have an average length of 0.3-2.5 microns. This nanofiber layer effectively captures fine particles while maintaining low resistance, enabling improved filtration performance compared to conventional filter elements. The filter element can be integrated into vehicle air conditioning systems to provide enhanced air quality while maintaining system performance.

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A new air conditioning filter system that improves indoor air quality while reducing energy consumption. The system comprises a fixed horizontal bar and a particulate filter device, with the particulate filter device and nano-chemical filter device connected by screws, and the nano-chemical filter device and nanocomposite high-efficiency filter device connected by screws. The system incorporates a nano-space cartridge filter for precise chemical filtration, and the entire system is mounted on a fixed horizontal bar. This configuration enables efficient airflow while maintaining optimal filter performance.

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A self-supporting filter material for air purification that achieves long-term operation through controlled deposition of filter fibers. The material's unique hyperbolic density distribution function in the filter matrix enables uniform impurity trapping throughout the filter volume, ensuring consistent airflow and pressure drop characteristics. This design enables self-supporting filtration without the need for pleating or collecting multiple layers, resulting in improved mechanical reliability compared to conventional volumetric filters.

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Air filter medium with enhanced dirt particle storage capacity through a unique dual-layer design. The medium comprises a first filter layer with a first fiber packing density, followed by a second filter layer with a different fiber packing density. The second layer is arranged behind the first layer in the flow direction, with nanofibers providing superior separation capabilities. This dual-layer configuration enables the medium to achieve higher dirt particle capture rates while maintaining optimal airflow efficiency.

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A process for preparing microfiber/nanofiber composite filter materials through a single-step electrospinning method. The composite material is produced by combining microfiber and nanofiber layers on a substrate using a gradient solvent vapor rapid removal device. The process achieves precise control over fiber diameter and pore size while maintaining high filtration efficiency and barrier properties. The composite structure comprises a substrate layer, a nanofiber layer, and a microfiber layer, with a weight ratio of 20-200g/m² for the microfiber layer and 5-50g/m² for the nanofiber layer.

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Air filter with enhanced adsorption capabilities through a novel filter medium. The filter comprises a transparent housing made of a material with high surface area and porosity, combined with a specially designed filter medium that incorporates advanced adsorbent materials. This combination enables superior adsorption of airborne pollutants, including particulate matter (PM2.5), while maintaining high airflow efficiency. The transparent housing allows for effective monitoring of filter performance and provides visibility for maintenance.

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Air conditioner filter with improved particle capture efficiency. The filter has a pleated design with layers in order of decreasing pore size: a first filter layer (≤5 μm), an electrostatic layer, a second filter layer (≤5 μm), an activated carbon filter layer, and a nanofiber filtration membrane layer (≤0.2 μm). The gradual reduction in pore size traps progressively smaller particles as they flow through the filter.

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Air filtration medium with enhanced dust retention capacity through a novel nanofiber web structure. The medium comprises a nanofiber web with a diameter less than 1 micrometer, where the average pore size of the web is between 1-10 micrometers, and an upstream microfiber web layer in face-to-face relationship with the nanofiber web. The web's pore size ratio is specifically optimized to achieve optimal dust retention while maintaining filtration efficiency. This unique web structure enables effective dust capture without compromising airflow performance, making it suitable for applications requiring high dust retention capacity in air handling systems.

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Ultrafine calcium anion multifunctional filter for indoor air purification systems that addresses conventional filter limitations. The filter comprises a core comprising a polymer matrix, a nano-fiber electrostatic filter, a nano-ferroin infrared filter layer, and a negative ion filter layer. The core is bonded to a second aluminum alloy filter, with the electrostatic filter and infrared filter layers positioned within the filter frame. This configuration enables efficient air filtration of submicron particulate matter while maintaining high airflow resistance and stability.

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Hollow porous nanofiber filtration membrane with enhanced filtration efficiency, low air resistance, and long service life. The membrane features a nanofiber structure with a hollow tubular cavity that is distributed along the fiber axis. The tubular cavity is formed by the nanofiber skin layer and extends axially through the fiber. The membrane is prepared through coaxial electrospinning, where a polymer dope is injected into a coaxial spinneret, and the fiber is directly deposited onto a receiving electrode plate. The resulting membrane has a unique hollow structure that enables efficient filtration of particles while minimizing air resistance. The hollow structure also enables the formation of a thin, uniform covering layer on the nanofiber layer, which enhances mechanical stability and prevents fiber separation during use.

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Automobile air conditioner filter with enhanced air purification capabilities through a novel dual-effect design. The filter comprises a frame with a fixed air layer and an activated carbon nanofiber membrane, with the air layer and membrane surfaces coated with an electric charge. The activated carbon nanofiber membrane sandwiched between these layers provides superior filtration performance against airborne pollutants, while the electric charge enables efficient collection of airborne contaminants. This dual-layer design combines the benefits of both air filtration and activated carbon adsorption, offering improved indoor air quality compared to conventional single-layer filters.

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A multi-scale, low-resistance air filter material that achieves high air permeability while maintaining precise filtration accuracy. The material consists of a non-woven protective layer, a micron fiber layer, a nanofiber nonwoven fabric layer, and a substrate layer, all wrapped in graphite nanosheets. The protective layer is bonded to the substrate layer through ultrasonic welding, creating a composite structure with optimized filtration properties. This multi-scale design enables both high air permeability and precise filtration accuracy, addressing the traditional trade-off between filtration efficiency and resistance.

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Filter media with nanofiber coatings that enable targeted separation of particles through electrostatic interactions. The media comprises a substrate, such as cellulose, with nanofiber cavities that are selectively charged through electrical breakdown. The charged cavities are formed by introducing nanofibers into or between the cavities through a specialized electrode assembly. This enables controlled electrostatic interactions between particles and the media, allowing for precise separation of particles based on their charge characteristics.

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