Ventilator Definition A ventilator is a type of air conditioning device that uses a motor to rotate fan blades, creating airflow to exchange indoor and outdoor air. It is also commonly referred to as a ventilation fan. The main purpose of ventilation is to remove stale or polluted air from a room while regulating temperature, humidity, and overall comfort. Ventilators are widely used in both residential and commercial settings to ensure proper air circulation and improve indoor air quality. History of Development The concept of ventilation fans began gaining traction in the late 1950s when Japan started mass-producing them. Initially, these devices were only capable of exhausting air in one direction, hence they were called exhaust fans. In 1964, a new design known as the shutter-type ventilation fan was introduced. In China, Guangdong Province’s Jiangmen City-based home appliance company produced its first 200mm open exhaust fan in 1974. By 1976, Shenyang’s exhaust fan plant began manufacturing 300mm metal shutter-type exhaust fans, and by 1979, they had developed a two-way shutter-type ventilation fan, marking significant progress in the industry. Working Principle There are three primary types of ventilation systems: exhaust, suction, and combined. In an exhaust system, fresh air enters through natural vents, while the fan expels the stale air. In a suction system, the fan draws in fresh air and releases the dirty air through natural exhaust points. A combined system uses the fan for both intake and exhaust, making it more efficient. These fans work by rotating blades to create airflow, facilitating the exchange of indoor and outdoor air. Proper ventilation helps maintain a comfortable and healthy living environment. When determining the required ventilation, different spaces may need varying amounts of air exchange. The amount of fresh air needed per person or per square meter is referred to as the required ventilation rate. The number of times the air is completely replaced in an hour is known as the air change rate (see table for reference). Structure of a Ventilation Fan The most common type of ventilator is the louvered model, which typically consists of a motor, fan blades, a frame, panel, shutters, and a special pull switch. The motor is usually a single-phase capacitor-run asynchronous motor, while smaller models under 150mm may use shaded-pole motors. Fan blades are generally made from lightweight and durable materials like ABS or AS plastic. The frame is often constructed using stamped and welded sheet steel, though some models use plastic injection molding. Panels are typically made via plastic injection, and shutters are formed from sheet steel or tinplate. Ventilation fans come in various sizes based on the diameter of the fan blade, including 100mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, and 500mm. Each size is suited for different applications depending on the space and airflow requirements. Recommended Promotions: Ceiling Mall's top-selling product: Integrated ceiling ventilation series Gree ultra-quiet powerful ventilation fan special offer: 188 yuan per unit NOYOK shaped NH30-03 kitchen exhaust fan: 154 yuan per unit Xinfei integrated ceiling Liuye ventilation fan special deal: 128 yuan per unit NOYOK integrated ceiling ventilation fan special price: 128 yuan per unit Gree ultra-quiet aluminum frame ventilation fan promotion: 188 yuan per unit Integrated ceiling, electrical aisles, ceiling windows, electrical switches, blinds, kitchen ceiling, shutter doors China leading manufacturers and suppliers of Desktop Boiling Sterilizer,Desktop Boiling Water Sterilizer, and we are specialize in Boiling Water Sterilizer,Boiling Instruments For Sterilization, etc. Desktop Boiling Sterilizer,Desktop Boiling Water Sterilizer,Boiling Water Sterilizer,Boiling Instruments For Sterilization Zenith Lab (Jiangsu) Co.,Ltd , https://www.zenithlabo.com