Public power facilities for clean workshops

　　The choice of light source and lamps for the lighting design of clean workshop

　　① The light source of the clean room, from the current domestic and foreign light sources, is suitable for the situation of relatively high illuminance in the clean room and short indoor p grid. Fluorescent lamps are generally used as the light source. Because fluorescent lamps have the advantages of high luminous efficiency, long life, soft light, good light color and low surface temperature of the light source.

　　②The choice of lamps and lanterns, in addition  meeting the illuminance requirements, the lighting lamps in the clean room should also meet the following requirements.

　　· maintain air tightness, the first thing  notice is that a structure can be built between the ceiling and the clean room  block air circulation. Secondly, when installing the lamps on the ceiling surface, use sealant and padding  achieve hermetic installation. Maintain positive or negative pressure in the clean room.

　　·Anti-static treatment, the reflecr of lamps and other lamp materials exposed  indoor air should be made of materials that are not easy  generate static electricity. Such as special polypropylene with anti-static treatment and other materials with low surface resistance.

　　·The shape with smooth surface and less convex and concave surfaces protrudes from the lamps installed under the ceiling, which should not disturb the unidirectional air flow, and the shape should not be easy  accumulate dust.

　　·It has good corrosion resistance. The lamps used in semiconducr facries and pharmaceutical facries are made of rust-resistant and corrosion-resistant materials that are resistant  acid and other drugs and disinfectants. The aluminum frame that has undergone anti-rust treatment should be coated with transparent paint .

　　·In a part of clean room production of phosensitive film, coating phosensitive materials, phosphor coating room in the picture tube workshop and pholithography room in the semiconducr facry, in order  prevent the phosensitive material from being exposed  light, it is necessary  use yellow or red light sources, or use ultraviolet shielding lampshade. Figure 6-52 shows the spectral transmittance characteristics of the yellow cover. Generally, there are more yellow fluorescent tubes that use yellow fluorescent powder  spray the inner wall.

　　·Maintenance is easy. The work of replacing the lamp tube and cleaning the lamp from the room or from the ceiling should be simple and easy  operate. Table 6-46 shows the lamps and their construction methods for clean rooms.