Significance of cleanliness in laboratory decoration
In ISO/IEC 17025 "General Requirements for Testing and Calibrating Laboratory Capability", the environmental conditions of clean laboratories are clearly demanded: "Laboratories should ensure that their environmental conditions do not invalidate the results or produce adverse effects on the required measurement quality." "Laboratories should monitor, control and record environmental conditions when relevant specifications, methods and procedures are required or have an impact on the quality of the results. Attention should be paid to such aspects as biological disinfection, dust, electromagnetic interference, radiation, humidity, power supply, temperature, sound level and vibration level to adapt them to relevant technical activities. When environmental conditions endanger the results of testing or calibration, testing and calibration should be stopped.
For water quality laboratories, the main parameters affecting indoor environmental quality are air cleanliness, temperature, humidity and so on. In the past, people paid more attention to the control of temperature and humidity in clean laboratories, such as emphasizing that air conditioners and dehumidifiers should be installed in large precision instrument laboratories. However, in today's air pollution problem, people do not pay enough attention to the parameter of air cleanliness in clean laboratories. At present, trace analysis laboratories with air cleanliness control system are not common in China.
Design Principles of Clean Air Conditioning for Laboratory Decoration
With the rapid development of microelectronics industry, medical and health industry, food industry, aerospace industry, precision machinery and fine chemical industry, the technical facilities of various industries not only have the conventional requirements of temperature and humidity for the environment, but also require the control of indoor particulate content, air flow and pressure within a certain range. Clean air conditioning technology emerges as the times require.
The location of clean laboratory should be chosen as far as possible in areas with cleaner environment and more greening. The air conditioning design of clean laboratory should follow the following principles:
(1) Labs with the same cleanliness requirements should be arranged together as far as possible without affecting production;
(2) Only the necessary process equipment is arranged in the clean laboratory, and the process equipment which easily produces dust and harmful gases is arranged outdoors as far as possible.
(3) In the same clean room, the processes requiring high cleanliness should be arranged in the area where the clean air flow first arrives.
(4) The process which is prone to pollution should be arranged near the return air outlet and the exhaust air outlet.
_The equipment and furniture of the clean laboratory are made of smooth and dustproof materials.
Modern trace analysis clean laboratory can not ignore the control of air cleanliness in the laboratory while meeting the environmental temperature and humidity conditions. Urban air generally contains substances measured to varying degrees. If the air cleanliness in the laboratory is not controlled, the accuracy and detection limit of trace analysis will be affected, and the service life of large-scale precision analysis instruments will be affected.
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