Electron optical purification of clean room decoration constant temperature and humidity effect, why do it and how to adjust temperature and humidity

The dust-free pharmaceutical cleanroom is to meet the requirements of the production process for the environment, and the temperature and humidity need to be controlled during the production process. The use of purification and dust-free workshop decoration can effectively reduce dust, bacteria, viruses, etc. in the air, and achieve constant temperature, constant pressure and constant noise, and provide a good production environment. When the production process of the product has requirements on temperature and humidity, it is necessary to do constant temperature and humidity treatment. Such as: electronic optical dust-free workshop, biopharmaceutical GMP pharmaceutical cleanroom, food aseptic clean room, etc. are all subject to constant temperature and humidity, because the general temperature and humidity control will bring unstable factors to the quality of products, so the temperature of the workshop is affected. Humidity has certain requirements. With the development of science and technology and the improvement of people's living standards, various industries have higher and higher requirements for the production environment, and the application of dust-free workshops is also extensive. The dust-free production environment has evolved into an important development of modern science and industry. Conditions, clean air technology is one of the important symbols to measure the development level of a country's science and technology and modern industry. 1. Example application areas: Electron optics--SMT clean room decoration has clear requirements for temperature and humidity, as follows: temperature: 24±2℃; humidity: 50±10% (clean workshop of electronic manufacturing industry) Temperature and humidity standards) Remarks: Special clean workshops have relevant temperature and humidity regulations. 2. Purpose: In order for the solder paste to work in a better environment, the temperature will affect the activity of the solder paste. have a certain impact. High temperature will increase its activity, which will ultimately affect the effect of screen printing and reflow. It is easy to appear the phenomenon of virtual welding and dull solder joints. The size of the humidity will cause the amount of water vapor absorbed by the solder paste in the air. For example, over-suction, such as too much water vapor, will cause the phenomenon of air, fly, and continuous welding during reflow. Electro-optical clean room has high constant temperature and humidity control accuracy. Because the manufacturing process of electronic products is extremely sensitive to changes in temperature and humidity, the air parameters in the clean room process area must be strictly controlled within a very small range. At present, the clean air-conditioning system generally adopts the Direct Digital Control (DDC) system with flexible control and reliable performance. When the indoor air parameters cannot meet the design requirements, the DDC control system can be used to automatically adjust the opening or closing of each valve. Small. In this way, the room temperature and humidity will not fluctuate too much, which will affect the product quality and yield. 3. Adjustment method of temperature and humidity in the decoration of clean room. The temperature test of clean room decoration includes functional temperature test and general temperature test. The functional temperature test is mainly used when the clean room needs to strictly control the temperature accuracy or when the builder requires the test in 'static' or 'dynamic'; the general temperature test is mainly used for the temperature test in the 'empty state'. For the temperature test of the decoration function of the clean room, the clean area should be divided into grids of equal area, and the area of ​​each grid should not exceed 100 square meters or be negotiated with the builder. Order at least 2. The test height should be the height of the working surface, and the distance from the ceiling, wall and ground should not be less than 300MM, and the influence of heat source should be considered. The measuring points for general temperature testing in clean room, one measuring point for each temperature control area or each room, the height of the test point should be the height of the working surface, the measurement time should be at least 1H, and the measurement should be made at least once every 6 minutes. Record. Humidity test for clean room decoration: humidity test can use ventilated dry and wet bulb hygrometer, capacitive hygrometer, digital hygrometer, and hair humidity instrument.

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