The Laminar Flow Units for operation rooms are used for providing the required laminar flow above the operation desk and to prevent bacteria and other particles entering in the patient zone.
Specifications
The sizing of the units are determined so that the outcome face velocity of air is between 0.2-0.3 m/s. The primary reason for this, is that above 0.3 m/s velocity, the operators are disturbed and below 0.2 m/s, irregularities within the laminar flow occur. There is a laminizer at the bottom face of the unit, which is made of stretched silk. The laminizer is a multi-piece part that permits connection of the pendent lamp. Connection ends for manometers are provided on the plenum to permit connection of manometers so that filter dirtiness can be measured. Main difference from the conventional laminar flow units is the location of the HEPA filters. The filters are located at the outlet of the plenum, instead of the plenum inlets. The filter area is drastically increased, thus leading to much lower pressure drop across the filter unit due to very low air velocity, eventually leading to lower operating pressures and reduced required fan power. For transportation ease, the units are manufactured in modular parts which are installed together on site.
