| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to ventilation equipment and is intended for isolating convective flows from heat-emitting equipment in microelectronics, pharmaceutics, high-precision mechanics and optics. In compliance with this method, air is fed to equipment mounted at exhaust panel from above via the panel of vortex-free air distributor in low-turbulence flow, uniformly via panel area, while flow rate id define from the following equation: V ? 0.45/?9.8 × l × ? × ?t m/s, where V is incident flow rate; l is equipment length, m; ? is air cubical expansion factor, 1/°C, ?t is difference in temperatures of equipment surface and incident flow, °C. Note here that air is withdrawn over the edges of heat-emitting equipment via exhaust panel. Note also that relationship between withdrawn air and plenum air should be kept equal to 1.2-1.4. Dimensions of plenum and exhaust panels and distance there between are defined from the following equations: h/(b-b)?1; h/(l-l)?1; h/b?2.0, where h, b, h are equipment height, width and length; b, lare width and length of panels; h is distance between panels.EFFECT: reliable isolation of convective flows and harmful emissions related herewith.2 cl, 5 dwg |
