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A Clean Room, also known as a clean room, is a room specially designed to remove pollutants such as microparticles, harmful air, and bacteria from the air within a certain space, and to control the indoor temperature, cleanliness, pressure, airflow velocity and distribution, noise vibration, lighting, and static electricity within a certain required range. Temperature monitoring is a key link in clean room management and is essential to ensure product quality and operating environment. This article will elaborate on how to effectively monitor the temperature of a clean room.
The importance of temperature monitoring
The temperature control of a modular clean room is directly related to the quality of the product and the operating efficiency of the equipment. Temperature fluctuations can affect the physical properties and chemical reaction rates of the material, which can adversely affect the performance of the product. According to the international standard ISO 14644-1, the temperature of a clean room should generally be controlled between 20-22°C to ensure the best production environment. In addition, the national standard GB 50472-2008 also clearly stipulates that the temperature of a clean room should be kept within the specified range to meet the cleanliness requirements of different levels.
Composition of temperature monitoring system
An effective temperature monitoring system usually includes key components such as temperature sensors, data acquisition systems and temperature controllers. Temperature sensors need to have high accuracy and fast response capabilities. Common sensor types include thermocouples and thermistors. The data acquisition system provides real-time temperature monitoring by summarizing and analyzing the temperature data collected by the sensor. For example, a clean room uses 10 temperature sensors, and the error of each sensor is within ±0.1°C, which can ensure the accuracy of temperature measurement.
Temperature control strategy
Temperature control strategies mainly include PID control algorithms and fuzzy control algorithms. PID control algorithms can accurately adjust temperature through proportional, integral and differential control. For example, if the area of the clean room is 100 square meters, it is necessary to calculate the cooling/heating capacity per unit area. Assuming that 0.5 kilowatts of cooling capacity is required per square meter, a total of 50 kilowatts of cooling equipment is required. Through the PID algorithm, accurate control of the cooling equipment can be achieved to maintain temperature stability.
Analysis and processing of temperature monitoring data
The analysis and processing of temperature monitoring data is the key to ensuring the effectiveness of temperature control. By statistically analyzing the monitoring data, the laws and trends of temperature fluctuations can be identified. For example, if the temperature fluctuation range of a clean room in a day is ±0.5°C, the temperature fluctuation can be reduced by adjusting the parameters of the Air conditioning system. In addition, data analysis software can be used to perform regression analysis on historical data, predict future temperature changes, and take preventive measures in advance.
Reference to international and domestic standards
During the temperature monitoring process, relevant international and domestic standards must be followed. For example, ISO 14644 series standards and national standard GB 50472-2008, etc. These standards put forward specific requirements for Clean room temperature control, such as the temperature change rate not exceeding ±1°C/h to ensure the stability of the environment.
Effective temperature monitoring is essential for the management of modular clean rooms. By using high-precision temperature sensors, advanced temperature control strategies and scientific data analysis methods, it is possible to ensure that the temperature of the clean room is kept within the optimal range, thereby ensuring product quality and production efficiency.
List of relevant standards and specifications
iso 14644-1:2015 Air cleanliness levels for clean rooms and related controlled environments
iso 14644-2:2015 Monitoring and testing of clean rooms and related controlled environments
GB 50472-2008 Cleanroom design specifications
ISO 14698-1:2003 Biological contamination control for clean rooms and related controlled environments
By understanding and following these standards, temperature monitoring of clean rooms can be more effectively performed to ensure an efficient and safe production environment.
