What are the classifications of ventilation systems?

Ventilation system is a popular way of decoration at present. In order to meet people's needs, ventilation systems are also divided according to several types. The following small series will introduce you to the classification of ventilation systems.

What are the classifications of ventilation systems?

1, classified by ventilation power: natural ventilation and mechanical ventilation;

2. According to the scope of ventilation services: comprehensive ventilation and local ventilation;

3. According to the airflow direction, it is classified as air supply (air intake) and exhaust (smoke exhaust);

4. According to the purpose of ventilation: general ventilation, hot air heating, detoxification and dust removal, emergency ventilation, protective ventilation, building smoke control, etc.

5. According to the location of power supply, it can be divided into centralized power supply and distributed power supply.

Composition of ventilation system

Ventilation system generally consists of ventilation equipment, ventilation pipes, silencers, fans and control systems.

1. Ventilation equipment: The commonly used ventilation equipment in the laboratory mainly includes detoxification cabinet, atomic absorption hood, universal exhaust hood, desktop ventilation hood, etc. Detoxification cabinet is a kind of ventilation equipment, which is used to safely handle harmful and toxic gases or vapors. Its function is to capture, seal and transfer pollutants and harmful gases to prevent them from escaping into the laboratory, so as to minimize the pollutants inhaled and contacted by operators.

2. Ventilation duct: For ordinary buildings, if the gas discharged indoors is not corrosive, galvanized steel plate can be used as ventilation duct; For the laboratory that produces corrosive gas, the air duct should be PVC air duct or FRP air duct made of corrosion-resistant materials.

3. Fans: Fans mainly include axial fans, diagonal fans and centrifugal fans. Axial flow fans and diagonal flow fans are suitable for ventilation systems with small wind pressure and short pipes, such as ventilation systems that are directly discharged outside the window or wall, which is referred to as direct discharge; Centrifugal fans are suitable for ventilation systems with long pipes, such as discharging to the roof through air duct shafts or external wall nozzles, which is called roof discharge for short.

4. Ventilation control system: The ventilation control system can adopt different control methods according to different situations, for example, single ventilation equipment constant air volume ventilation control system, multiple ventilation equipment variable frequency control system and multiple ventilation equipment variable frequency+variable air volume ventilation control system.

Summary: So much for the classification of ventilation systems. According to the classification, it can be divided into the above categories, each with different uses. If you want to know more about it, you can pay attention to our Qijia. Com for consultation.