Knowledge of cleanliness and energy-saving operation management of general production workshops

With the rapid development of China's electronic industry and the oversupply of products, the competition of various products is becoming increasingly fierce The key to win the competition is product quality and price: cleanliness is the prerequisite for the production of electronic products, and low cost is the basis of product price Let's introduce our management experience in this area for your reference 1 Cleanliness Management: our production workshop requires air conditioning cleanliness of 3000 (British system, the same below) and 5000 When the installation manufacturer is debugging, it is determined according to the actual design data, such as: the air speed at the filter outlet is about LM / S; the air speed at the return outlet is about 2m / s the cleanliness can meet the requirements when it is initially put into production and in medium batch production After the commissioning manufacturer's evacuation, with the increase of production, the cleanliness gradually fails to meet the requirements In addition, the equipment transformation and upgrading, the problem of cleanliness becomes more prominent when the actual production exceeds the design output, and the cleanliness of some stations even drops to 1 million level In addition, the cleanliness of large areas around the area exceeds the standard The company once stopped production due to the fear of product quality problems, and foreign experts carried out the analysis on the reasons for exceeding the standard All kinds of speculation, never found the reason 2 Energy saving operation management in order to reduce the operation cost, our company adopts the following methods for air conditioning operation: (1) The temperature and pressure of chilled water vary with the seasons In summer, due to the high temperature and humidity, before the air is sent to the production site, it needs to be cooled and dehumidified (the outdoor air humidity is often over 85%) At this time, we control the chilled water temperature at 6-7 ℃, and the pressure at 5-5.5kg/cm2 In winter, if the chilled water is still above the temperature and pressure, it is very difficult to open the chilled water valve of air conditioner to a small extent Control, eventually lead to frozen water, heating, humidification valve three are open, resulting in a huge waste of energy (2) the pressure difference of each process shall be controlled according to the lower limit of 0.5mm water column (5pa), and only one double motor air conditioner shall be opened as far as possible Our company's important process air conditioners are designed for double fan operation, and the reference value of designed air change times is the average value of the same industry (3) according to the characteristics of long summer and short winter in Shenzhen, the standard of temperature and humidity of constant temperature and humidity air conditioning should be raised appropriately (i.e the heat enthalpy should be raised), so as to save cooling capacity and heat (4) other energy-saving measures: in order to reduce the cooling and dehumidification load of chilled water in summer, we will appropriately increase the air conditioning set point of cooling water dehumidification, heating and heating in summer without affecting the air conditioning control range, and turn the fresh air volume and exhaust air volume to small in summer; in winter, turn the fresh air volume and exhaust air volume to large under the permission of air conditioning Comfort air conditioner is equipped with temperature controller to control the ambient temperature at 26-28 ℃, so as to achieve large-scale energy saving.