​How to control relative humidity in a clean room

Controlling Relative humidity in A Clean Room is an important part of ensuring a stable laboratory environment and product quality. Humidity that is too high or too low may affect experimental results or even damage sensitive equipment or materials. This article will explain in detail how to effectively control relative humidity in a clean room, including equipment selection and the application of intelligent monitoring systems.

Selection of humidity control equipment

1. Air conditioning system

Modern modular clean rooms are usually equipped with efficient heating, ventilation and air conditioning (HVAC) systems. The choice of such a system is crucial because it not only regulates temperature but also accurately controls humidity. An ideal HVAC system should have the ability to replace air every hour, usually 4-10 times is recommended, to ensure the stability of humidity control.

2. Humidifiers and dehumidifiers

Using efficient humidifiers and dehumidifiers in clean rooms is an effective means of controlling humidity. Humidifiers can effectively increase air humidity in dry seasons, and the humidification capacity should usually reach 5-10 liters per hour to meet the needs of different environments. Dehumidifiers help maintain humidity between 30%-50%, which is considered the optimal humidity standard for most cleanrooms.

3. Smart monitoring system

Introducing a smart monitoring system can track humidity changes in real time and adjust them in time. Such systems are usually equipped with highly sensitive sensors that can sound an alarm when humidity exceeds the set range. The monitoring system needs to be calibrated regularly to ensure its measurement accuracy, and the ideal response time should be within 1 minute to allow for rapid humidity adjustment.

Operational strategy for humidity control

1. Regular maintenance of equipment

Regular maintenance of the HVAC system is key to ensuring its normal operation. It is recommended to check the equipment once a quarter, including replacing filters and cleaning condensers. This not only improves equipment efficiency, but also avoids humidity fluctuations caused by equipment failure.

2. Set a reasonable humidity range

In A CleanRoom, a reasonable humidity setting is crucial. Generally speaking, it is ideal to keep the relative humidity between 40%-60%, which can prevent static electricity and the growth of microorganisms. Depending on the needs of different industries, you may need to make corresponding adjustments according to the requirements of specific products.

3. Data Recording and Analysis

By recording humidity data, managers can better understand the trend of humidity changes and formulate reasonable operation strategies. It is recommended to use a data logger to record humidity levels once an hour for long-term analysis. The accumulation of this data can help us make more accurate decisions in future operations.

and Industry Standards

Controlling the relative humidity of the modular clean room is not only related to the environmental quality of the laboratory, but also directly affects the stability and reliability of the product. By selecting the right equipment, regular maintenance, setting a reasonable humidity range, and performing data monitoring and analysis, the humidity level of the clean room can be effectively managed to ensure that it is always in the best condition.

List of industry-related standards and specifications

• ISO 14644-1: classification of cleanrooms and related controlled environments

• iso 14644-2: Monitoring and management of cleanrooms

• ASHRAE 170: HVAC standards for medical facilities

• GMP (Good Manufacturing Practice): Environmental control requirements for the Pharmaceutical industry

By following the above standards and recommendations, it will help you effectively control the relative humidity of the cleanroom and ensure the efficient operation of the laboratory.