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Application of remote air dust particle counter in biological clean room

Date:2020-12-23 11:12:10

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With the development of modern biotechnology, biosafety has attracted the close attention of scientists and technicians in the biological field. Generally speaking, for the safety of biological experiments, experiments are usually carried out in clean rooms.
A clean room is a place where people can work when the air cleanliness reaches a specified level, and its function is to control particulate pollution. Generally speaking, it can be divided into industrial clean room and biological clean room according to usage. The industrial clean room takes inanimate particles as the control object, while the biological clean room mainly controls the pollution of the work object by microorganisms. The following is a brief description of the safety standards that should be paid attention to in the design of biological clean room by Gongminwang.
① The design and construction of the clean room should meet the standards. In order to improve the cleanliness level of the clean room, companies can reserve some rooms for future development, but the air purification system cannot be turned on at ordinary times; the design and construction should be carried out according to the different requirements of different production processes and different production processes for environmental cleanliness.
②The “send back” method is not recommended. The benefits of "upload and return" are low cost and money saving, but it has many problems, such as too many particles, low wind speed in the working area, difficult to reach the standard, and longer self-cleaning time.

③Pay attention to the air changes in the clean room. Air exchange rate, pressure difference and number of suspended particles are the basic requirements of a clean room. Whether it is turbulent dilution or single-phase flow displacement, the clean room needs to control and realize various parameters through the amount of clean air. Therefore, the air exchange rate of the clean room should not be too low.
In addition, the clean room also needs a lot of purification equipment, such as air inlet system, return air system, self-cleaning device, clean shed, buffer zone, etc. All of these are to produce and manufacture products in a good environmental space. In a clean room, we need instruments to measure the number and size distribution of dust particles in the air, which can provide a basis for the assessment of air cleanliness. The remote air particle counter is an instrument that measures the number and particle size distribution of dust particles in the air.
The detection principle of the remote air dust particle counter: the measured gas will pass through the laser head of the particle counter at a prescribed flow rate, and the dust particles in the gas will scatter the laser signal in the particle counter, so that the optical sensor in it will receive and generate pulse information signals. Then, the pulse information signal is output and amplified, and then processed by the digital signal. By comparing with the standard particle signal, the comparison result is expressed by different parameters. The number of electric pulses corresponds to the number of particles, and the amplitude of the electric pulses corresponds to the size of the particles.