Cleanroom

Clean room air conditioning purification systems can be divided into fresh air systems, once-circulated air conditioning systems, twice-circulated air conditioning systems, and air conditioning systems with nested independent air processing units, according to the way air flow is utilized. The fresh air system treats outdoor fresh air to meet clean room air quality requirements, then sends it indoors without recirculation and exhausts all the air directly, suitable for situations where return air cannot be reused, such as: areas generating dust; regions with cross-contamination; areas with serious hazardous substances; and other areas where pollution cannot be controlled despite local exhaust ventilation. The advantage of the fresh air air conditioning system is that it can replace and dilute the polluted environment within the controlled area, greatly reducing the risk of cross-contamination in Tianjin food processing plant construction, and simplifying ventilation pipelines. However, the disadvantages are also apparent: energy consumption, difficulty in controlling relevant parameters, frequent filter replacement, and the need for pre-treatment of exhaust air.