Variable frequency high-pressure fans are suitable for applications that require precise data, such as certain laboratories or specialized equipment. The speed of the high-pressure blower can be adjusted through an external variable frequency drive, thereby modifying the fan's parameters, such as flow rate and pressure.

In comparison to conventional fans, the variable frequency high-pressure fan differs primarily in appearance by having an additional variable frequency cooling fan at the motor's rear. This cooling fan requires a separate power supply, meaning it needs to be connected to either single-phase 220V or three-phase 380V voltage. The voltage of the cooling fan is selected based on the fan's voltage.

Variable frequency high-pressure fans must not be connected to a variable frequency inverter, otherwise they will lose their independent cooling function. They will not achieve a constant speed, thereby rendering their function ineffective.

Why add a dedicated cooling fan? Since the fan operates using a variable frequency method, increasing the speed is feasible. However, if the speed is reduced, the motor will generate excessive heat. At this point, the fan speed will decrease along with the frequency, leading to insufficient heat dissipation and potentially damaging the motor.

The frequency conversion high-pressure blowers are equipped with dedicated frequency conversion motors, with a frequency range of 5 to 70. Simply connect the wires from the frequency converter to the motor terminals, and if it needs to reverse, just swap two wires.

The motor section has the same wiring method as usual; refer to the High-Voltage Blower Wiring Diagram. The operation method of the inverter can be checked in the related manual.

In summary: Motor wiring connects to the variable frequency inverter, while variable frequency fans require a direct connection to the power source.

Variable frequency high-pressure fans are typically operated on various types of machinery equipment, possibly placed independently at a location. However, during installation, we generally follow the following rules:

The fundamental, noise reduction, and vibration-proofing devices of the high-pressure fan should comply with the requirements of the equipment's technical documents.

During the on-site assembly of the high-pressure blower, the binding of the rope must not damage the exterior of the machinery components.

The pipeline sections of high-pressure fans, such as lubrication, oil cooling, and sealing systems, should undergo strength tests. When there are no regulations in the equipment technical documents, the pressure for hydrostatic tests should be 1.25 to 1.5 times the high working pressure, and the pressure for pneumatic tests should not exceed 1.05 times the high working pressure.

4. The intake duct, exhaust duct, valves, and regulating devices of high-pressure fans should all have independent supports. The housing should not bear any additional loads to prevent deformation.

When cutting or welding pipes connected to a high-pressure blower, the housing should not be deformed. Generally, it is advisable to perform this after the pipe and housing are disconnected.

The lateral midpoint line of the high-pressure fan is based on the midpoint of the inlet and outlet pipes, while the vertical midpoint line is based on the drive shaft, with an allowable error not exceeding ±5mm.

The elevation of the high-pressure fan is based on the transmission shaft, with an allowable error not exceeding ±1mm.