(1) In the clean room standards of various countries, the number of air changes in non-unidirectional flow clean rooms of the same level are not the same.my country's \"Code for Design of Clean Workshops\" (GB 50073-2001) clearly stipulates the number of experience air changes required for calculation of clean air supply for different levels of non-unidirectional flow clean rooms, as shown in the following table:

The definition of clean room is a room where the concentration of airborne particles is controlled.Its construction and use should reduce indoor induction, generation and retention of particles.Other relevant indoor parameters such as temperature, humidity, pressure, etc. are controlled as required.A measure of clean room cleanliness: the degree of cleanliness distinguished by the number of particles of a certain particle size per unit volume of air.Cleanliness level:

In the clean room standards in each country, the number of non-single stream cleaning chambers of the same level is not the same. my country's \"Clean Plant Design Specification\" (GB 50073-2001) clearly stipulates the number of experiences required for different levels of different levels of freedom of clean and delivering air volume, see below:

In the clean room standards in each country, the number of non-single stream cleaning chambers of the same level is not the same. my country's \"Clean Factory Design Specification\" (GB 50073-2001) clearly stipulates that the number of experiences required for different levels of non-single-way streamlined cleaning air supply calculations required, see below: Remarks: Number of ventilation is suitable A clean room with a layer of less than 4.0m. The room is small, and the lower limit is adopted. Clean room with more than 100,000 level is not less than 12 times. In addition: Experimental animal environment and facility national standard GB14925-2001 specifies that the normal environment 8-10 / h barrier environment 10-20 isolation environment 20-50 1. Temperature and relative humidity clean room (zone) temperature and relative humidity should be related to drugs The production process is compatible. When there is no special requirements, the temperature should be controlled at 18 to 26 ° C, and the relative temperature should be controlled at 45% to 65%. two,

With the continuous development of science and technology, the production and modern scientific experiment activities of modern industrial products are increasingly high, especially microelectronics, biopharmaceuticals, medical institutions, precision manufacturing, food processing, etc. Have high quality, high purity, high reliability indoor environment. Air clean technology has become an indispensable basic conditions for modern industrial production, medical and scientific experimental activities, and is an important means to ensure product quality and environmental safety, which are increasingly widely used in various industries. Clean room has a certain air cleanliness level, controlling multiple parameters (air cleanliness, air volume, wind speed, pressure, temperature, humidity, bacterial concentration, etc.). Clean air conditioning system is the main means of implementing clean room control. The clean air conditioning system mainly has the following characteristics compared to the general construction air conditioning system: 1) Ensure the temperature and humidity of the production process; 2) Guaranteed the net