The fresh air system is on fire. So what are the standards for the installation and design of the fresh air system? In recent years, people have begun to pay close attention to the quality of indoor air due to the haze weather. After the air purifier is fired, CADR (Clean Air Output) It has become a familiar word. However, after the air purifier is running for a period of time, the indoor air is still too stuffy without opening the window, which is the same as the air conditioner. Therefore, the fresh air system has moved from engineering to family, and the number of fresh air exchanges (ie, fresh air volume) has become one of the standards for people to purchase fresh air systems.
The brand market of the fresh air system is mixed, and consumers are hard to convince some fresh air manufacturers to identify the new air volume. Therefore, the calculation method of understanding the number of air changes in the fresh air system often has a more direct opinion on the choice. According to different living environments, the demand for fresh air is different. The following small series introduces the calculation method of the number of fresh air exchanges and the new air volume standards in different building environments.
Example of calculation of fresh air ventilation times:
The area of ​​a computer room is S=60 (m2), the net height is h=3 (m), and the person is n=10 (person)
1. If calculated according to the fresh air volume required by each person, the fresh air volume Q1=nq=10*70=700(m3/h). (take the fresh air volume required by each person q=70 (m3/h));
2. Calculate according to the number of fresh air exchanges in the room, take the number of fresh air exchanges in the room p=5 (times/h), then the fresh air volume Q2=qn=5*60*3=900(m3/h).
Since Q2>Q1, Q2 is taken as the basis for equipment selection.
The fresh air system is used as a ventilation and purification equipment that operates continuously for 24 hours. If the fresh air volume is too large, it may cause waste. If the air exchange volume is too small and the ideal ventilation effect is not achieved, it needs to be selected according to personal habits and the built environment. Of course, the fresh air system generally has multiple wind speeds, and consumers can choose according to the maximum fresh air volume.
In addition, the durability of the fresh air system is important because in most cases it takes 24 hours to run continuously.
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