Lamp type of indoor ultraviolet sterilization lamp

The direct ultraviolet germicidal lamp can only be used to disinfect the air in no man's space, and cannot irradiate indoor personnel with direct ultraviolet light, because it will cause injury to personnel (such as electric light eyes, skin burns, fine spots, etc.). During the "SARS" period, there were frequent injuries of ultraviolet lamps in various places, which were mostly caused by the injury of ultraviolet lamps caused by improper use in manned space. Therefore, when using direct ultraviolet lamp for disinfection, it should be turned on for 0.5 ~ 2H in advance, and personnel can enter the room only after the lamp is turned off. Direct ultraviolet lamp can only disinfect unmanned space. Generally, ordinary hot cathode low mercury lamp is used, equipped with quartz glass lamp tube with high ultraviolet transmittance; Some products are allowed to produce a certain amount of ozone to cooperate with disinfection. However, since ozone will cause personnel headache, chest tightness, dizziness and other symptoms, when the light is turned off, open the doors and windows for ventilation for 30 ~ 60min immediately. Only after the smell of ozone is not heard can personnel enter the room to work.

Direct ultraviolet lamps are mobile and fixed. When mobile lamps are used, special personnel shall be responsible to ensure safety. During fixed installation, the control switch and lighting switch shall be obviously different, and warning signs should be used; The design drawing shall indicate that it is strictly prohibited to install in parallel with the lighting switch. In Tanghai hospital project, the ultraviolet lamp switch is designed to be 18m above the ground; A red warning light is installed above the outdoor door frame to prevent unauthorized entry. In primary and secondary school classrooms and other places, it is best to centralized control in the duty room.

The direct ultraviolet lamp has the advantages of simple structure, low cost and good disinfection effect. Generally, it will not cause chemical formula or high temperature damage to the disinfected object, and has obvious advantages. However, it can only be used for static disinfection of unmanned space, which limits its application scope. It is mostly used for static disinfection of frequently polluted space in hospitals and other places. The required power of direct ultraviolet disinfection lamp is more than or equal to 1.5W per cubic meter of indoor air. We can determine the quantity according to the power of ultraviolet disinfection lamp.