Commercial Exterior Exhaust Fans

Commercial Exterior Exhaust Fans

This commercial exterior exhaust fan is in the form of a single suction, with a total of 13 machines, 5.6~22.4. Each fan can be manufactured in a right-handed or left-handed form. The position of the fan outlet is indicated by the angle of the air outlet of the casing. The left and right fans can be divided into three angles of 0°, 90° or 180°.
Product description

Product introduction:

This commercial exterior exhaust fan is in the form of a single suction, with a total of 13 machines, 5.6~22.4. Each fan can be manufactured in a right-handed or left-handed form. The position of the fan outlet is indicated by the angle of the air outlet of the casing. The left and right fans can be divided into three angles of 0°, 90° or 180°.

Product features:

1. The commercial exterior exhaust fan is mainly composed of an impeller, a casing, an air inlet and a driving part. The impeller is welded between the curved wheel cover and the plate wheel by a rear blade. It is made of steel or aluminum alloy and runs stably after static and dynamic balance calibration. It can meet the special needs of high air volume and low pressure air conditioning. The fan has a compact structure, high efficiency, low noise, flat curve and wide performance range.

2. The outer casing of commercial exterior exhaust fans is a volute welded by ordinary steel plates. No5.6~11.2 overall structure of the shell, No12.5~22.4 shell split type. The air inlet has an integral structure of converging flow lines and is fixed at the inlet of the casing. The drive part consists of a main shaft, a bearing housing, a rolling bearing and a pulley.

Use of the product:

It adopts double suction belt drive and is suitable for ventilation of chemical fiber, textile, industrial and mining enterprises, shopping malls, hotels and ordinary buildings. It is the best product for ventilation and flammable volatile gases to be used with air conditioning purification equipment. When used, the gas temperature must not exceed 80 °C.

Performance and selection:

The performance of a wind turbine generally refers to the air transmission capacity under standard conditions. The specified state of the fan is pa0 = 101325Pa, the gas temperature is t0 = 20°C, and the gas density is ρ0 = 1.2kg / m 3 .

When the actual situation does not match the above specified conditions, the performance under actual conditions must be converted to the specified situation. After that, the fan can be selected according to the performance of the conversion.

When the fan enters normal operation during installation, or the flow is too large or too small during use, you can use one of the following methods to remove it.

1. Adjust the flow using the degree of opening and closing of the damper.

2. Adjust the flow rate by changing the speed of the fan.

3. Regulate the flow by replacing the fan with a higher or lower pressure.

The flow rate is adjusted by changing the pipe network drag coefficient.

It must be noted that throttling devices are often used to regulate flow. But when the actual flow is much larger than the required flow, this method is not economical due to excessive power waste. If allowed, it is usually used to reduce the fan speed or to replace the fan with a lower pressure.

When the damper is fully open, the flow seems to be still too small and the throttling device is no longer working. Therefore, the user should minimize the resistance coefficient of the pipeline network to increase the flow rate, or the user can increase the fan speed and replace it with a higher pressure fan. However, if the fan is directly connected to the motor and connected through the coupling, the speed of the fan usually cannot be changed, and only the speed of the fan driven by changing the belt can be changed by changing the diameter of the pulley. However, the maximum speed of the fan must not exceed the maximum speed in the performance table and calculate the motor power.

Note:

Please indicate the fan model, machine number, speed, air volume, wind pressure, air outlet angle, direction of rotation, motor model, power supply, fan accessory configuration, etc. Special requirements should be made in time for ordering.

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