How is the purification efficiency of an air shower room measured?
Publish Time: 2024-12-03
As an important air purification device, the measurement of the purification efficiency of an air shower room is crucial for evaluating the performance of the device and ensuring a clean environment.
The purification efficiency of an air shower room is mainly measured through specific test methods and indicators. Among them, dust particle counting is one of the common means. Before the air shower room is operated, a professional dust particle counter is used to sample and test the air entering the air shower room, and the number of dust particles of different particle sizes per unit volume is recorded. Then, after the personnel or goods are purified in the air shower room, the dust particle counting test is performed again at the air outlet. By comparing the changes in the number of dust particles in and out of the air shower room and the particle size distribution, the removal rate of dust particles is calculated, which intuitively reflects the purification efficiency of the air shower room for dust particles. For example, if the concentration of dust particles in a certain particle size range before entering the air shower room is 100,000 per cubic meter, and after passing through the air shower room, it is reduced to 1000 per cubic meter, then the removal rate of dust particles of this particle size can reach 99%.
Microbial removal rate is also a key indicator for measuring the purification efficiency of air shower rooms, especially in places with strict requirements for microbial control, such as the pharmaceutical and food processing industries. By collecting air samples before and after the air shower room, the number of microorganisms (such as bacteria, fungi, etc.) is detected and counted using culture methods and rapid detection instruments to obtain the purification and removal ratio of microorganisms.
In addition, the measurement of the purification efficiency of air shower rooms also needs to consider its graded purification effect on dust particles of different particle sizes. Usually, attention is paid to the purification of key particle size segments such as 0.3 microns, 0.5 microns, and 5 microns, because dust particles of different particle sizes have different effects on product quality and environmental cleanliness in different application scenarios.
In actual testing, relevant standards and specifications, such as ISO 14644 and other clean room and related controlled environment standards, must be strictly followed. The temperature, humidity, air pressure and other conditions of the test environment must also be controlled and recorded to ensure the accuracy and reliability of the test results. Only by applying these measurement methods and indicators scientifically and comprehensively can we accurately evaluate the purification efficiency of air shower rooms, provide strong data support for their rational application in various industries, equipment selection, subsequent maintenance, performance improvement, etc., and thus effectively ensure the quality and safety of clean production, experimental and other environments.