Several Key Issues in Engineering Design and Construction of Purification Workshop

In the renovation of factory clean rooms, the most common are Class 10,000 clean rooms and Class 100,000 clean rooms. For large-scale dust-free room projects, the design, infrastructure, and fitting, as well as equipment procurement, of both Class 10,000 and Class 100,000 clean rooms must adhere to market and construction engineering standards.

Phone and fire alarm equipment

Cleanroom telephones and intercom systems are installed to minimize personnel movement within the clean area, reduce dust generation, and enable timely external communication in case of a fire emergency. Additionally, a fire alarm system should be set up to prevent significant economic losses due to undetected fires.

2. Ductwork demands a balance between economy and efficiency

In centralized or purified air conditioning systems, the requirements for ductwork are both economical and efficient in air distribution. The former is reflected in low cost, ease of installation, low operational costs, and smooth inner surfaces with minimal resistance. The latter refers to good tightness, no leakage, no dust generation or accumulation, no contamination, and resistance to fire, corrosion, and moisture.

3. Focus on energy-saving for air conditioner purification

Air conditioning purification is a major energy consumer, and energy-saving measures must be considered during design and construction. In design, factors such as system and area division, air volume calculation, determination of temperature and relative humidity, air cleanliness level and air change rate,新风 ratio, pipe insulation, the effect of joint types on air leakage during ductwork fabrication, the impact of main and branch pipe connection angles on air flow resistance, and whether flange connections leak, all relate to energy consumption. Therefore, these details must be taken into account.

4. Select Air Handling Units Based on Climatic Conditions

When selecting an air handling unit, consider the climate conditions. In northern regions with low winter temperatures and high air dust content, it is advisable to add a new air preheating section to the standard air conditioning unit. Use a spray-type air treatment method to both clean the air and achieve the required temperature and humidity through heat exchange. In southern regions with humid climates and lower air dust concentration, there is no need for preheating new air in winter. Air filtration and temperature and humidity control can be achieved through initial efficiency filtration, surface cooling for temperature and humidity regulation, and optionally, enhancing the temperature and humidity reduction process. Followed by medium efficiency filtration and final high or ultra-high efficiency filtration. It is recommended to use variable frequency fans with the air handling units, which not only saves energy but also allows for flexible adjustment of airflow and pressure.

5. Air conditioning rooms should be located on the side of the clean room.

The location of the air conditioning room should ideally be on the side of the cleanroom, which not only saves energy but also facilitates the arrangement of air ducts and makes the air flow more rational, while also helping to reduce engineering costs.

6. Multi-machine冷水机组 offers greater flexibility

If a large cooling capacity is required for a chiller unit, it is not advisable to use a single machine. Instead, a multi-machine setup is recommended, with variable frequency drives for the motors to reduce starting power. Multiple machines can be used flexibly, thus avoiding the inefficient energy waste of "a strong horse pulling a small cart."

7. Self-regulating devices ensure full-range adjustment

Currently, some manufacturers use manual methods to control the adjustment of air volume and pressure, but since both the control valves for air volume and pressure are in the technical partition, and the suspended ceilings are all soft steel plate ceilings, they are generally adjusted during installation and debugging and have not been altered since. In order to ensure the normal production and operation of clean rooms, a more comprehensive automatic control system should be set up to achieve the following functions: monitoring of air cleanliness, temperature and humidity, and pressure difference in clean rooms; detection of temperature, pressure, and flow of high-purity gases, pure water, and recirculating cooling water; and monitoring of gas purity and water quality of pure water.