Analysis of the advantages and characteristics of cross-flow fans

Cross-flow fan, also known as part of the ventilator, is a fan commonly used in industrial and mining enterprises, An is different from the general fan it's motor and air blades are in a cylinder, the shape is a cylinder, used for part of the ventilation, the device is convenient, ventilation and ventilation effect is obvious, safe, can borrow the wind cylinder wind to the designated area.

Cross-flow fan is characterized by fluid flow through the fan impeller twice, the fluid along the radial inflow and then along the radial outflow, intake and exhaust direction is in the same plane, the gas discharged along the direction of the fan width spread evenly. Because of its simple structure, small size, high dynamic pressure coefficient and reach a longer interval, widely used in laser instruments, air conditioning, air curtain equipment, dryers, hairdryers, home appliances and grain combine harvester.

Let's briefly talk about the general knowledge of cross-flow fans.

Cross-flow fan is also called cross-flow fan on the market, the characteristics of the inlet and outlet air constitute a 90 ° right angle. Cross-flow fan from the following points to learn.

1. Impeller: the impeller of the cross-flow fan is relatively long barrel-shaped fan blade, so that the design of large air inlet and outlet, so that it is in the same air volume, greatly reducing the noise.

2. Do double-sided dynamic balancing: the above impeller is long barrel-shaped, is processed through the hardware, not inevitably can be balanced to do a very standardized, so our company is after 100 percent on the dynamic balancing machine to correct the balance of the norms to reach. The market is not that can turn on the good! That is part of the people, we recognize that a well-balanced cooling fan can extend its life. So no matter how many labor hours value we keep balanced.

3. The impeller, is through the engineer repeatedly through the software simulation of wind volume, wind pressure, noise, and then hit the board test. Not a simple design drawings open molds can be, are designed by craftsmanship, completely avoiding "unequal spacing, unequal angle, different heart". That is, let it cut the wind of each fan blade noise, so that the overall operation of the wind noise is consistent, if the presentation of "unequal spacing, unequal angle, different heart" presents a murmur, so that the noise of the whole.

4. The important thing is the motor, it is the heart of the fan. Since it is the heart that is too important to do cross-flow fan our motor load margin to leave 60% of the space. Why leave such a large space? Because we do not know the customer with the environment and air duct design, if the design of the air duct affects a lot of wind resistance, this time the motor began to greatly increase the load, so our company is to do a series of tests, so that the maximum load, the motor utilization rate of 58%, there is still 42% of the space, so that it is safe. If the motor power does not work then the motor announced a buzzing sound, that the whole cross-flow fan noise, and motor temperature rise short life. AC fan

Cross-flow fans have a wide range of applications, air purifiers, air curtains, cold wine coolers, fireplaces, coolers, solariums, subways, harvesters and other equipment are used.