Internal Circulation Oil Fume Purification Unit An internal circulation oil fume purification unit is an advanced air treatment system designed to efficiently remove grease, smoke, odors, and other airborne contaminants generated during cooking processes in commercial kitchens, industrial food processing facilities, or other environments with high oil fume emissions. This system operates on a closed-loop principle, recirculating purified air back into the workspace instead of exhausting it outdoors, making it an energy-efficient and environmentally friendly solution. Key Components and Working Principle 1. Pre-Filtration Stage The unit typically begins with a mechanical filter (e.g., mesh or baffle filter) that captures large grease particles and solid residues. This stage prevents clogging of subsequent filters and enhances overall efficiency. 2. Electrostatic Precipitation (ESP) or High-Efficiency Filtration - In electrostatic systems, ionizing wires charge oil particles, which are then attracted to oppositely charged collection plates, effectively removing fine particulate matter. - Alternatively, high-efficiency particulate air (HEPA) or activated carbon filters may be used to adsorb odors and ultrafine particles. 3. UV Photocatalytic or Plasma Oxidation (Optional) Some units incorporate UV light with a titanium dioxide (TiO₂) catalyst or low-temperature plasma technology to break down volatile organic compounds (VOCs) and eliminate persistent odors through oxidation. 4. Internal Air Recirculation Unlike external exhaust systems, this unit recirculates cleaned air back into the kitchen, reducing energy loss from heating or cooling replacement air. This feature is particularly beneficial in cold climates or energy-conscious facilities. Advantages - Energy Efficiency: Eliminates the need for ductwork and external exhaust fans, lowering HVAC operational costs. - Environmental Compliance: Reduces outdoor emissions, meeting stringent air quality regulations. - Space-Saving Design: Ideal for buildings where external venting is impractical (e.g., basements or high-rise kitchens). - Low Maintenance: Automated cleaning mechanisms (e.g., self-cleaning electrostatic cells) minimize manual upkeep. Applications - Commercial kitchens (restaurants, hotels, cafeterias) - Food processing plants - Industrial frying or roasting operations Conclusion The internal circulation oil fume purification unit offers a sustainable and cost-effective alternative to traditional exhaust systems, ensuring cleaner indoor air while conserving energy. Its modular design and advanced filtration technologies make it adaptable to diverse operational needs, promoting healthier and more efficient kitchen environments.