AVC Qihong measures the air volume and static pressure of the fan

This article is absolutely dry. It is an authoritative document on the calculation method of the air volume and static pressure measurement of the cooling fan sent by AVC Ru0026D. u003cbru003e u003cbru003e u003cbru003e The air volume performance curve is the double wind box test method using AMCA standard, (pressure difference Pn) is the air pressure difference before and after the wind resistance, which is obtained by measuring the air pressure difference formed by the airflow through the wind resistance to the two wind boxes (static pressure Ps) Formula (A) can be used to calculate the air flow rate obtained from the air pressure difference, and the auxiliary blower is used to offset the aerodynamic force. u003cbru003e u003cbru003e Refer to the following formula and unit: u003cbru003e u003cbru003e Qu003d60AV ……（A） Flow rate formula u003cbru003e u003cbru003e Q: Air flow rate (m3/min) flow rate u003cbru003e u003cbru003e A: Nozzle sectional areau003dF/4D2 (m2) Wind resistance sectional area u003cbru003e u003cbru003e V：Average flow velocity from nozzle Average flow velocity from nozzle u003cbru003e u003cbru003e u003cbru003e u003cbru003e r: Specific gravity (kg/m3) of air (ru003d1.2kg/m3at20℃, 1atm) u003cbru003e u003cbru003e g: Gravitational accelerationu003d9.8m/S2 Gravitational acceleration u003cbru003e u003cbru003e Pn: Differential Pressure (mmH2O) u003cbru003e u003cbru003e Ps: Static pressure (mm H2O) u003cbru003e u003cbru003e Maximum air volume: When the wind resistance is turned on to absorb the wind blown from the auxiliary blower so that the static pressure is 0 (Psu003d0), the air pressure difference between air box A and air box B is the maximum, and the air flow rate generated by the air pressure difference Calculated by the above formula, it is called the maximum air flow. u003cbru003e u003cbru003e Maximum static pressure: As shown in the figure below, when the wind resistance is closed, the air pressure in the air box A is the maximum, and the air pressure difference (Ps) between the air pressure in the air box A and the air box B is the maximum static pressure. u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e u003cbru003e Tongchi Auto is specialized in making fans, acting as the agent of Taiwan AVC Qihong fans, Japan’s SAN YODENKI Sanyo cooling fans, and JAMICON Kaimei fans. We have our own production workshop and Ru0026D team to provide customers with the most professional and perfect technology. Support, welcome to consult!