Foshan Lan Yu ventilation equipment specializing in the development and production, including evaporative air conditioners, portable air conditioners, vacuum blower, curtain walls, including a variety of ventilation equipment and so on ... the use of evaporative cooling suction fan principle, the general air outdoors through When wet curtain, absorbs heat by evaporation of water, which led to the cooling air, become cool air, so that the indoor temperature is an effective cooling, a further feature of the wet curtain ventilation cooling system according to the cooling process was filtered outdoor air dust emissions, increasing intake oxygen content of the air inside the plant imported more fresh, better operating environment for air quality. Principle of negative pressure suction fan ventilation exhaust air outside the indoor unit pressure drop, indoor air thinned to form a negative pressure zone, air flows into the interior due to barometric pressure compensation. In practical applications, industrial plants, centralized suction fan mounted on the side of the plant, factory air intake located on the other side, the air intake by mouth suction fan convection hair. In this process, near the suction fan to keep doors and windows closed, forcing air from the air intake flow into the workshop, the workshop flows discharged from the suction fan shop. Negative pressure ventilation fan thorough, efficient ventilation rate of 99%. Fan Features: 1. frame and shutters are made of galvanized steel mold manufacturing. 2. Disposable blades stamping, forging gas using screw fastening, the computer precision balance calibration. 3. Low noise, high winds, smooth and reliable operation. 4. blinds fittings manufactured using high strength steel materials, closed tight, long service life. 5. Motor 380V / 220V is optional. 6. Fans of the series is the most important feature of air volume, low noise, good looks, smooth operation, easy maintenance, low price; this product is available in humid, corrosive gases under normal use in harsh environments, is widely used in flower garden greenhouse ventilation ventilated livestock ventilation and cooling, textile workshops and other cool places.