Several issues that must be paid attention to in order to achieve high precision
Release time:
2018-10-12
High-precision constant temperature and humidity laboratories are used to control the temperature fluctuation range within a large space to ±0.5℃; the relative humidity fluctuation range is controlled to ±2%, meeting the requirements of high-precision constant temperature and humidity environments. The main application areas are: measurement, optics, optoelectronics, paper, textile fibers, biosafety, precision machining and other inspection and verification laboratories.
High-precision constant temperature and humidity laboratories are used to control the temperature fluctuation range within a large space to ±0.5℃; the relative humidity fluctuation range is controlled to ±2%, meeting the requirements of high-precision constant temperature and humidity environments. The main application areas are: measurement, optics, optoelectronics, paper, textile fibers, biosafety, precision machining and other inspection and verification laboratories.
To achieve high precision, four aspects must be paid attention to:
1. The decoration must strictly achieve the effect of heat preservation and moisture insulation;
2. High-precision constant temperature and humidity air conditioning is the key; high-precision constant temperature and humidity air conditioning must be able to adjust the cooling capacity according to the temperature difference; real high-precision constant temperature and humidity air conditioning has two ways to adjust the cooling capacity: chilled water type and variable frequency type.
3. Air supply method:
The air supply method has gone through several stages:
air supply from the bottom and air return from the top, which is mostly used in machine rooms with low precision requirements and sensible heat concentrated in the lower part;
air supply from the upper hood and air return from the lower side, which is mostly used in small machine rooms with low temperature and humidity requirements;
air supply from the upper duct diffuser and air return from the lower side, which has also been used in laboratories, but the actual maximum precision of humidity can reach ±3%;
upper diffuser + microporous air supply and air return from the lower raised floor: the air supply and return are uniform, which is the only effective air supply method for high-precision constant temperature and humidity laboratories.
4. Fresh air system
Fresh air not only meets the laboratory staff's demand for fresh air, but also contributes to and is indispensable to ensuring the stability of temperature and humidity, because the temperature and humidity outside the laboratory vary greatly with the seasons. In order to ensure that the laboratory is not affected by the outside world, the only effective way is to add fresh air to the laboratory and ensure that the laboratory air pressure is positive, so that the unqualified air that changes at any time from the outside world cannot be mixed into the laboratory, ensuring the long-term stability of the laboratory.
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