The principle of

Is the use of air convection, negative pressure ventilation cooling principle, natural inhalation of fresh air from the installation site to the door or window, the indoor stuffy gas quickly forced out of the outdoor, any poor ventilation can improve the machine, cooling ventilation effect can reach 90%-97%. The whole machine adopts CAD/CAM design, with low investment cost, large air volume, low noise, low energy consumption, stable operation, long life, high efficiency, automatic shutters to dustproof, waterproof, beautiful and generous; Can blow air, is a modern factory cooling ventilation of high quality choice, but also ventilation. The negative pressure fan of environmental protection and energy saving will become the mainstream of ventilation and cooling equipment market. Prevent rainwater intrusion.

The material

1. Outer frame material

FRP glass fiber negative pressure fan: fiber reinforced plastic (FRP) : light, high strength, good corrosion resistance, excellent insulation material, used to manufacture insulation. Good dielectric protection at high frequencies. Microwave transmittance is good. (4) Good thermal performance. FRP thermal conductivity is low, not easy deformation, nai fire. Due to the above characteristics of FRP, the negative pressure fan made of glass fiber reinforced plastic is resistant to high temperature, acid and alkali resistance, light weight and stable, and has a longer service life

2. Transmission mode

Direct type

(1) The direct negative pressure fan blade is directly installed on the motor, reducing the power loss generated by transmission, with the power of the fan, the direct negative pressure fan air volume is about 10% larger than the belt type.

(2) Direct type without belt friction noise

(3) Motor: the motor is the heart of the negative pressure fan, and the direct motor is the aluminum shell motor with a special 12-pole dustproof and waterproof grade above IP55

(4) Air blade: the air blade of negative pressure fan is divided into aluminum alloy, stainless steel, aluminum alloy foundry, aluminum alloy die casting, nylon iron and other materials. The difference of the air blade material is determined according to the different places of use. Commonly used blades are aluminum alloy, stainless steel, aluminum alloy sand leaf.