With economic development and improvement of living standards, currently in the electronics, pharmaceutical, food, biological engineering, medical and other fields on the increasingly high demand for clean room, clean technology also will be developed. It combines technology, construction, decoration, water supply and drainage, air purification, HVAC, and other aspects of the technology. People's Republic of China in accordance with standard GBJ73-84 "clean plant design specifications", the air conditioning system is related to the main technical indicators:

A. Air cleanliness level per M3 air ≥0.5 micron dust particles per M3 number of dust particles in the air ≥0.5 m
100 ≤35 × 1001000 Level ≤35 × 1000≤25010000 level ≤35 × 10000≤2500100000 level ≤35 × 100000≤25000

B. Temperature and humidity
(1) meet the production requirements;
(2) the production process without temperature and humidity requirements, clean room temperature is 20-26 ℃, humidity less than 70%;
(3) staff purification and living room with a room temperature of 16-28 ℃.

C. Cleanroom positive
Clean room must maintain a certain positive pressure. Different levels of clean room and clean area and non-clean areas between the static pressure difference should be not less than 4.9Pa, clean areas and outdoor static pressure difference, should not be at 9.8Pa ..
In addition, the amount of wind, wind speed and other technical requirements. In short, the indicators are very strict clean room, so its precise control is a must.