The difference between the air outlet of central air conditioning and fresh air system

The difference between the air outlet of central air conditioning and fresh air system

Nowadays, many families not only choose central air conditioning, but also choose fresh air systems to improve the air quality in their homes. So, what do you know about the difference between central air conditioning and fresh air system outlets? Let the editor of okmarts.com give you a detailed introduction to the knowledge about the difference between the air outlet of central air conditioning and fresh air system.

　　 Fresh air system air outlet

The function of the air outlet of the fresh air system is to send the fresh air sent through the fresh air duct to the room. Sometimes, the fresh air system has exhaust air, and the dirty air will enter the exhaust duct through another air outlet and pass through the fresh air duct. Row outside.

The size of the air outlet first depends on the capacity of the fresh air ventilator. If the size of the air outlet is too large and the duct is too long, the airflow speed will decrease, which will affect the indoor fresh air effect; if the air outlet size is too small, then The airflow speed will become faster, which will cause the wind to directly blow to the human body, and people will feel uncomfortable. The faster airflow speed may also cause excessive airflow noise.

　　 In order to prevent the noise of the air outlet, the wind speed of the air outlet should generally be designed at 2 to 5 meters per second. When the floor height of the room is 3~4 meters, the wind speed should be 2~2.5 meters per second. According to experience, it is generally possible to install a tuyere with a design area of 20-25 square meters, and the air volume of each tuyere shall not exceed 500 cubic meters per hour. There are no clear regulations on the size of the return air outlet. The designer can design flexibly according to the specific situation. The size of the air outlet and return air outlet depends on the capacity of the indoor unit. In different use environments, the size of the air outlet is different. In small rooms, the size of the air outlet is relatively smaller. In classrooms, broadcasting rooms, libraries, hospitals, theaters, concert halls, amusement halls, offices, shops, For hotels and other places, choose a larger air outlet size. In order for people to avoid interference caused by noise and determine the size of the air outlet in various environments, the installation height must also be considered.

　　Central air conditioning outlet

　　 The central air outlet is the terminal equipment used for supply and return air in the central air conditioning system, and it is an air distribution equipment. The air supply port sends the refrigerated or heated air to the room, while the return air port sucks the dirty indoor air back. The two form an entire air cycle. While ensuring the indoor cooling and heating effect, it also ensures the cooling and cooling of the indoor air. Comfort.

The size of the air outlet depends on the capacity of the indoor unit. If the air outlet is too large and the air duct is too long, the airflow speed will decrease, which will affect the effect of the air conditioner; if the air outlet is selected too small, the airflow speed will increase, thus It may cause discomfort caused by wind blowing directly on the human body, and may also cause excessive noise.