Nowadays, many industries will use dust-free workshops, but each industry needs a clean workshop will have its own characteristics. For example, the focus of the design and construction of dust-free workshops in electronics factories is electrostatic control. Next, the electronic purification project of Hejie technology will give you a detailed introduction to the electronic purification workshop is how to prevent static electricity.

Electronic products in the process of production, will be more sensitive to static electricity, if the production environment is too much static electricity, it will bring a greater impact on the parts of electronic products, one, static electricity will lead to dust accumulation on the surface of the product, resulting in short circuit, second, static electricity in the process of discharge may damage or breakdown electronic parts. So in the design and construction of electronics factory dust-free workshop, the focus is on the control of static electricity. And the amount of static electricity is mainly related to the temperature and humidity in the space. Generally speaking, high humidity can reduce the generation of static electricity in the space, but if the humidity is too high, it will actually affect the production of products and the comfort of personnel; Low humidity is suitable for static electricity and a potential source of damage. Therefore, in the actual construction process of the purification workshop of the electronics factory, a compromise value needs to be obtained. After the investigation and practical application of multiple data, it is found that the relative humidity between 35% and 40% can be used as a satisfactory compromise, which can control the generation of static electricity and is conducive to the production of products and the comfort of personnel.

For example, in precision machining and metering, the workpiece must be kept at a certain temperature in order to prevent errors caused by thermal expansion. The permissible fluctuation range of workpiece temperature should be determined according to machining accuracy. Therefore, when the precision mechanism purification workshop is designing the constant temperature system, it is generally based on the constant ambient air temperature, so the corresponding ambient temperature accuracy is lower than the permissible temperature accuracy of the workpiece. When determining the parameters of constant greenhouse and selecting automatic control, it is necessary to consider the dynamic characteristics of the workpiece constant temperature and humidity workshop, enclosure structure, air handling equipment and automatic control system.

For example, in the electronics industry manufacturing workshop is the most important place to generate static electricity, usually static electricity will cause short circuit or scrap products or even cause employees to faint accident, so the relative humidity of the purification workshop of the electronics industry should not be less than 30%, which can effectively reduce the generation of static electricity, generally speaking, the relative humidity of the anti-static area of the electronic purification workshop is higher than 50%. The humidity is too low in the dry workshop, the number of dust particles will increase, so, electronics factory purification workshop without special requirements, the temperature is controlled at about 22℃, the relative humidity is controlled between 55 ~ 60%RH, in this environment, static electricity basically disappeared, the staff comfort is also better.

For another example, SMT workshop also has strict requirements on temperature and humidity. First of all, the main purpose is to work in a better environment for the solder paste, temperature will affect the activity of the solder paste, which has a certain impact on the activity of the related solvent of the flux added inside. High temperature will increase its activity, and ultimately affect the effect of silk screen mounting and reflux. Prone to virtual welding, solder joint luster and other phenomena. The size of the humidity back to cause the solder paste in the air to inhale the amount of water, such as over suction such as too much water, will make the reflux air, fly gradually, welding and other phenomena. So SMT constant temperature and humidity workshop temperature and humidity standard: temperature is 4±2℃, humidity is 50±10%.