First, from the outer frame raw material differences: FRP glass fiber (glass steel), galvanized steel, plastic steel profiles;

Galvanized steel plate does not need to be introduced in detail. Many people have mastered it. Its advantage is economic and practical on ventilation and cooling equipment for the workshop.

Negative pressure fan of plastic steel profile raw materials: rarely used in the market at present;

FRP glass fiber negative pressure fan :FRP is synthetic fiber lifting plastic

FRP characteristics: (1) light texture and high toughness. (2) Corrosion resistance can be good. On air, water and general concentration of acid, alkali, salt and a variety of vacuum residuals and organic solutions are very good resistance. (3) Good electrical performance. Good cable sheathing raw material, used to produce processing conductors and insulators. High frequency can still maintain high quality dielectric positive charge. Microwave oven heating running stability high quality. (4) High quality temperature characteristics. FRP heat transfer coefficient is low, not easy to bend, because some to the workshop ventilation and cooling standards are relatively strict.

Because of the above characteristics of FRP, the negative pressure fan of FRP raw materials has high temperature resistance, corrosion resistance, light and strong quality, and longer service life;

Two, transmission system mode: the transmission system mode of negative pressure fan is divided into horse type or belt type.

From the perspective of the transmission system, the transmission system harms the air volume, noise, and maintenance of the centrifugal fan; Right away;

1. The blade of instant negative pressure fan is installed on the motor immediately to reduce the power consumption caused by transmission. For centrifugal fans with the same power, the air volume of instant negative pressure fan is about 10% larger than that of the belt type; After the belt of the negative pressure fan is loosened for a long time, the air volume of the centrifugal fan will be significantly reduced after it is loosened.

2. There is no noise caused by friction of the belt on the horse; Belt type to maintain, the general centrifugal fan belt can be used for 2 years (imported), a small amount of only by a year, especially in the air to install the negative pressure fan disassembly is also extremely difficult.

3. Motor: Motor is the cardiovascular of negative pressure fan. Belt motor general general motor (other manufacturers match special motor) and instant motor is negative pressure fan 12 extreme pollution resistance level above IP55 aluminum shell motor; The motor of the pressure fan

4. Fan blade: The fan blade of negative pressure fan is divided into aluminum profile, stainless steel plate, aluminum profile sanding process, titanium magnesium aluminum alloy aluminum alloy die casting, polyester cloth iron and raw materials. The difference of fan blade raw materials is determined according to the different sites used. The more common fan blade for aluminum profile, stainless steel plate, aluminum profile sand process blade. The fan blades of titanium magnesium aluminum alloy die casting are resistant to high temperature due to the characteristics of raw materials, relatively strong and not easy to bend and crack; Polyester cloth and iron fan leaves are used for strong oxidant places, general hot dip galvanizing plants with corrosion.

Negative pressure fan daily maintenance and solutions to common problems: no matter what commodity, the use of the whole process must be maintained and maintained, so that the service life of the product can be improved and it is difficult to cause common problems. Of course, the products of Runfeng frozen Equipment Co., Ltd. are not excepted. Although the quality of Runfeng refrigeration equipment Co., Ltd. is the representative, but good goods should also be appropriate operation steps, to love, so that the workshop ventilation and cooling can achieve good desired effect.