What is the meaning of the residual pressure in the fan equipment parameters?
On the machine outside the pressure in the end is the machine outside the full pressure or external pressure Is the full pressure outside the machine. Write outside the static pressure is usually measured when the dynamic pressure as 0. It can be seen that the concept of external pressure is not a standard concept, but must be taken into account the pressure loss of the unit itself can provide the full pressure.
Air conditioning units or new air units often installed in the final fan, the fan outlet high wind speed, high pressure, static pressure is small, the project often installed at the exit muffler static pressure box, reduce the dynamic pressure, increase static pressure, , Muffling effect.
General residual pressure means that static pressure can be provided outside the unit to overcome the duct or equipment resistance, excluding dynamic pressure. Because the general to maintain a certain air supply speed.
The external pressure of the machine is the sum of the dynamic pressure and static pressure at the outlet of the fan. Usually, the static pressure is often neglected and the dynamic pressure is neglected. When the air volume is small, the effect of dynamic pressure is small. Such as fire exhaust fan) generally in accordance with the machine outside the pressure election.
The concept of external pressure is generally from the manufacturer sample sample provided by the machine outside the pressure is generally considered the unit itself after the pressure loss can provide the full pressure, the sample in addition to providing static pressure outside the machine, will provide outside the machine Residual pressure value, but rather the machine is not necessarily have static pressure
