The number of air exchanges, which represents the number of times the clean indoor air is replaced per unit time, is usually measured in "times/hour". The calculation method of air exchange rate is: air exchange rate = room air supply volume / room volume. This value is not only related to the nature of the room, but also affected by many factors such as room volume, height, location, air supply method, and the degree of exchange in indoor air quality.
In a clean room, the number of air exchanges is critical to maintaining cleanliness. Clean rooms of different cleanliness levels have different requirements for the number of air exchanges: Class 100,000 clean room: number of air exchanges ≥ 15 times/h Class 10,000 clean room: number of air exchanges ≥ 25 times/h Class 1,000 clean room: number of air exchanges ≥ 50 times/h Class 100 clean room: cross-sectional ventilation 0.25-0.35m/s. To ensure the air purification effect of the clean room, the number of air exchanges per hour is generally required to reach more than 10 times, while some rooms with special requirements require 15 times. times or even more.
In order to determine the number of air exchanges, the following steps are required: Test ventilation volume: Use professional testing equipment, such as air volume hoods or air volume meters, to measure the ventilation volume of the clean room. These devices can display measurement data in real time and are easy to operate. Calculate the room volume: When constructing a clean room, the volume (V) of the room can usually be determined. Calculate using the formula: Use the formula n = Q / V, where n is the number of air exchanges, Q is the ventilation volume, and V is the room volume, to calculate the actual number of air exchanges. Through the above steps, the number of air exchanges in the clean room can be accurately determined and detected, thereby ensuring that the cleanliness and air purification effect of the clean room meet the expected standards.
Suzhou Pharma Machinery Co.,Ltd.
2025/06/20
Icey
