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One-way purification room and turbulent clean room in Dongguan purification project


One-way purification room and turbulent clean room in Dongguan purification project

The Dongguan purification project is in a one-way flow clean room. From the air inlet to the air return, the cross-section of the air flow is almost the same. In addition, the equalizing and equalizing effect of the inlet static pressure box and the high-efficiency filter. The flow velocity is relatively uniform, and at least in the work area, the flow lines are parallel in one direction and there is no vortex. These are the three characteristics of one-way flow clean room. The streamlines here are parallel in one direction, which means that the time-average streamlines are parallel to each other, the direction is single, and the clean airflow is not one or more, but fills the cross-section of the whole room, so this clean room does not rely on clean airflow to clean the indoor dirty air. The effect of mixing and dilution is to exhaust the indoor dirty air along the entire section to the outside by the push of clean air to achieve the purpose of purifying the indoor air.

Therefore, the one-way clean room air flow in Dongguan purification project is "piston flow" and "flat push flow". The former Soviet Union called it "squeezed weak air jet". Clean air is like an air piston, pushing forward (down) along the "cylinder" of the room, so that the dust particles can only enter forward (down) without returning, squeezing the original air with high dust concentration Out of the room.

The main feature of the turbulent clean room of the Dongguan purification project is that the cross-section of the air flow from the flow to the outflow (from the air supply port to the air return port) is changed. The cross section of the clean room is much larger than the cross section of the air supply port. The cross-section of the chamber or the cross-section of the entire working area forms a uniform airflow.

Therefore, the flow lines after the air outlet have a large or increasing angle with each other and a small radius of curvature. It is impossible for the airflow to flow in a single direction in the room, they will collide with each other, and vortices will be generated. This determines that the flow pattern of the turbulent clean room is: sudden flow; non-uniform flow.

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