Xin Feng Classroom | Ventilator Series: Fan Models and Naming Conventions

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Ventilator Models and Nomenclature  

I. Complete Designation of Ventilators  

The complete designation for centrifugal ventilators comprises six elements: name, model, size, drive method, rotation direction, and outlet position. The standard sequence for writing this designation is as follows:

II. Ventilator Designations The designation codes for ventilators are straightforward—they're simply abbreviated pinyin spellings of the Chinese characters. Ventilators serve a wide range of purposes, with as many as eighteen distinct types.

3: Ventilator Model The model consists of three sets of parameters: total pressure coefficient, specific speed, inlet type, and design sequence number.

Model Number: The model number is denoted by prefixing the rounded-off decimeter measurement of the fan impeller size with "№". Drive Type: Centrifugal fans feature six drive configurations. Rotation Direction: Observed from the motor position, clockwise rotation is designated as "right-hand rotation" (right); counterclockwise rotation is designated as "left-hand rotation" (left). Air Outlet Position: Denoted by the angle relative to the outlet position and rotation direction, specified as "right" or "left" with a numerical angle. 

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 Fan Air Volume Q    Air Volume Q: The fluid volume transported by the fan per unit time, typically expressed as volumetric flow rate Q in m³/s or m³/h. Strictly speaking, the fan flow rate specifically refers to the flow at the fan inlet.  Q1=3600F1×V1 Q2=3600F2×V2 Q1 — Flow rate of inlet pipe (m³/h)  Q2 — Flow rate of outlet pipe (m³/h)