A fluorine-free wear-resistant super-hydrophobic coating for heat exchangers that combines excellent anti-corrosion and weather resistance properties with enhanced mechanical durability. The coating achieves super-hydrophobic performance without fluorine elements, addressing environmental concerns while maintaining superior performance characteristics. The coating's thickness can be tailored to achieve specific performance requirements, including wear resistance, corrosion protection, and condensation heat transfer efficiency. The preparation method involves modifying silicon dioxide and silicone resin surfaces to create the super-hydrophobic coating, which can be applied to heat exchangers for improved performance in various industrial applications.
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A hydrophobic coating for cold storage evaporator surfaces that prevents frost formation through a novel combination of fluorosilicone acrylic resin and hydrophobic alumina particles. The coating is prepared through a simple room-temperature cold spraying process, enabling rapid and cost-effective application. The hydrophobic alumina particles are modified with an organic fluorine-containing chain segment to prevent clumping and uneven dispersion, while the fluorosilicone acrylic resin provides mechanical strength and thermal stability. This coating achieves superior anti-frost performance compared to conventional methods, with enhanced durability and system reliability.
A heat exchanger with integrated antibacterial and deodorizing surfaces that selectively perform these functions based on operating conditions. The heat exchanger features a hydrophilic coating comprising a first transition metal oxide that reacts with moisture to form an acidic environment, while a second transition metal oxide or post-transition metal oxide catalytically degrades when exposed to air. This dual-function coating enables continuous performance of both antibacterial and deodorizing properties through dynamic surface chemistry, with the coating composition optimized for optimal performance across refrigeration and drying modes.
A self-cleaning method for air conditioning systems that prevents oil contamination on heat exchanger fins. The method involves applying a hydrophilic and oleophobic coating to the heat exchanger fins, which enables the formation of large contact areas between oil droplets and the coating surface. During the cooling cycle, the oil droplets crystallize, and during the condensation cycle, the crystals are removed from the fins through the condensed water flow. This process creates a continuous cleaning mechanism that prevents oil from accumulating on the heat exchanger fins.
A hydrophobic coating for air-conditioning radiators that prevents water droplets from forming ice on the radiator surface during heating. The coating is prepared using a modified silicone emulsion as the base film-forming material, combined with formaldehyde-teramine formaldehyde resin for cross-linking. The coating formulation balances water-repellent properties with improved thermal resistance, enabling efficient heat dissipation while maintaining air conditioner performance.
Antimicrobial hydrophilic coating for air-conditioning heat exchanger surfaces that combines durable antibacterial and antifungal properties with water resistance. The coating comprises nano-metals, oxides, and acrylic resin, with a total mass of 100 parts. The coating's antibacterial and antifungal performance is enhanced by strategically incorporating specific antibacterial agents, such as silver and zinc, in the coating formulation. The coating achieves superior performance through a synergistic effect between the metal components and the acrylic resin, maintaining its hydrophilic properties even after repeated scouring.
A heat exchanger for refrigeration systems that prevents water droplet condensation on heat transfer fins through a novel polymer coating. The coating comprises a brush-like polymer chain aggregate with controlled mobility against water droplets, which forms a stable liquid layer that suppresses water droplet adhesion and ice formation. This coating maintains its liquid state even in humid environments, ensuring optimal heat transfer efficiency. The coating can be applied to heat transfer surfaces and can be maintained through continuous replenishment of the liquid layer.
A method for reducing fouling on heat exchanger surfaces through a novel silicon oxide coating process. The coating, comprising a non-continuous film of silicon oxide, achieves superior anti-fouling properties compared to conventional coatings by minimizing surface roughness while maintaining thermal stability. The process enables the creation of coated heat exchangers with reduced fouling characteristics, particularly for complex geometries, without the need for continuous coatings or conformal coverage. The coating's unique composition and curing process enable effective adhesion to metal surfaces while maintaining mechanical integrity.
An air conditioner with a heat exchanger featuring an antifouling coating that suppresses dust adhesion through a novel combination of nanoparticles and a specially developed coating film. The coating film, which is integrated into the heat exchanger fins, enables effective dust suppression while minimizing cross-linking forces from dew condensation. This integrated approach addresses conventional issues of dust accumulation and bacterial growth in air conditioning systems.
Condenser design for air conditioning systems that enhances heat transfer efficiency through a novel coating strategy. The condenser comprises a heat exchange pipe with alternating hydrophilic and water-repellent coating layers along its length. The hydrophilic layer forms a uniform film on the inner surface, while the water-repellent layer creates a barrier against condensed water droplets. This dual-layer approach prevents the formation of water droplets that can impede heat transfer, while maintaining the condensation process. The coating pattern can be designed to optimize performance across the condenser's operating range.
Anti-fouling air source heat pump heat exchanger that prevents scaling through a unique surface treatment. The coating comprises a hydrophobic polymer layer that reduces surface energy on the spiral coil's inner surface, preventing mineral particles from adhering. A low surface energy layer enhances wear resistance. This innovative approach addresses the conventional scaling issues in air conditioning heat exchangers by targeting the underlying physical mechanisms of fouling rather than relying solely on chemical descaling methods.
A heat exchanger with a super-oleophobic coating on the outside of the tube that prevents grease droplets from adhering to the tube surface. The coating features a surface with a contact angle greater than 150°, creating a hydrophobic barrier that prevents oil droplets from penetrating the tube. The coating is applied to the tube's exterior surface, extending along its length, and can be integrated with the tube's finned design. This prevents fouling and ensures efficient heat transfer while maintaining the tube's structural integrity.
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A coating for air source heat pumps that prevents frost formation on the evaporator surface while maintaining efficient defrosting performance. The coating comprises a hydrophobic anti-icing material with enhanced oil repellency properties, designed to prevent frost accumulation on the heat exchanger surface. This coating provides superior defrosting capabilities compared to conventional coatings while maintaining the heat pump's efficiency and environmental benefits.
Composite material for heat exchanger fins that prevents condensation and frost through a dual-layer nano-scale coating. The coating comprises a hydrophobic primer layer and a superhydrophobic nanostructured top layer, where the nanostructured layer is created from hydrophobic nanoparticles with a particle size range of 5-300 nm. This nanostructured layer prevents water droplets from entering the gap and converting to the Cassie state, while maintaining hydrophobicity. The primer layer enhances wear resistance and adhesion without compromising frost prevention. The composite material demonstrates superior frost resistance compared to conventional superhydrophobic coatings.
A superhydrophobic coating agent, heat exchanger, and heat exchanger surface treatment method that enables continuous defrosting of heat exchangers through controlled liquid droplet formation. The coating agent forms stable, uniform droplets of liquid onto the heat exchanger surface, which then break apart and freeze into a solid, non-wetting layer. This continuous droplet formation mechanism enables the heat exchanger to maintain a stable liquid film, eliminating the need for intermittent heating and defrosting operations. The treatment method can be applied to various heat exchanger surfaces and can be integrated into existing heat exchanger designs for enhanced performance and environmental sustainability.
A heat exchanger with an antifouling coating featuring hydrophilic inorganic nanoparticles and a fluorine compound. The coating has a controlled particle size of less than 100 nm and maintains a surface roughness of 2.5 nm to 100 nm. The fluorine compound is incorporated within the coating film at concentrations of 0.1% to 10% by weight, ensuring both hydrophilicity and oil repellency. This dual-function coating provides effective antifouling properties against both dry stains and water-based contaminants, enabling self-cleaning performance without compromising the heat exchanger's performance.
A coating for outdoor air conditioning units that prevents ice formation on the wind guide ring by modifying the surface properties of the heat exchanger fins. The coating creates a hydrophobic surface that prevents water droplets from forming on the fins, thereby preventing ice accumulation and frost formation. This coating enables the outdoor unit to maintain efficient operation while preventing ice buildup, which can cause motor damage and system malfunction.
A modified wet membrane for air-conditioning external heat exchangers that enables self-cleaning and enhanced dehumidification performance. The membrane comprises a dense skin layer with a hydrophilic surface treated with a lithium salt and a porogen, which significantly increases water vapor permeability and enhances the membrane's self-cleaning capabilities through improved surface interaction with water vapor. The membrane's porogen is incorporated into the polytetrafluoroethylene (PTFE) matrix, providing controlled pore size and density, while maintaining the membrane's mechanical integrity. This innovative design enables the membrane to effectively remove airborne particulate matter and pollutants from the air stream, while maintaining its self-cleaning properties.
A water-based graphene superhydrophobic self-cleaning coating for air-conditioning heat exchangers that achieves superior performance in condensation control and corrosion protection while eliminating the need for harsh solvents. The coating, comprising a graphene-based surface layer, exhibits a water contact angle greater than 150°, enabling effective water management and protection against ice formation. The coating's wear resistance properties are demonstrated through friction tests on prepared aluminum foil surfaces, demonstrating superior durability compared to conventional coatings.
Heat exchanger for preventing dry dirt adhesion in applications requiring high-temperature heat transfer, such as air conditioning units. The heat exchanger features a nanoparticle-based antifouling coating with a unique surface morphology that controls dry dirt adhesion. The coating's surface features an arithmetic average grain size between 2.5 and 100 nanometers, creating an uneven surface that prevents dry dirt from adhering. The coating is applied to the heat exchanger surface, where it forms a durable, hydrophobic barrier that prevents dry dirt particles from accumulating. This surface morphology is achieved through a proprietary nanoparticle composition that maintains its surface irregularities within specified limits.
Hydrophilic coatings are used in HVAC systems, particularly on heat exchangers, to improve performance and longevity. These coatings are water-attracting and help manage condensation by promoting efficient drainage, reducing water carryover, diminishing the risk of mold and bacterial growth and enhancing heat transfer. They also offer corrosion protection, especially in humid or coastal environments.
In heat pumps, where the coils can act as both evaporators and condensers, the hydrophilic coating helps manage condensation in both modes. Microchannel heat exchangers have compact designs and increases the need for efficient condensate management.
Hydrophobic coatings for HVAC systems are designed to repel water, preventing it from adhering to surfaces like coils and potentially causing corrosion or reduced efficiency. These coatings create a high contact angle with water, causing droplets to bead up and roll off instead of spreading. The beading and runoff effect can lead to a self-cleaning mechanism, where water droplets carry away dust and other contaminants, keeping the coils cleaner for longer. This can lead to several benefits, including improved heat transfer, reduced corrosion, minimized repair cost and extended equipment lifespan.
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