Does anyone know what to do? What is the main equipment of the ventilation system?

1, ventilation duct. In the ventilation system, air is transported or extracted by ventilation pipes. Ventilation pipes have circular and rectangular sections. Besides straight pipes, ventilation pipes also include elbows, front and back bends, variable diameter bends, tees, four-way joints and other pipe fittings according to the actual needs of the project. Common air ducts in ventilation and air-conditioning engineering include ordinary steel plates, galvanized steel plates, stainless steel plates, aluminum plates and other metal air ducts, rigid PVC plastic plates, plastic composite steel plates (rooms with a plastic layer of 0.2-0.4mm thickness sprayed on the surface of ordinary steel plates) and glass fiber reinforced plastic air ducts. FRP duct can be divided into thermal insulation and non-thermal insulation. Non-insulated FRP duct is called FRP duct, and insulated FRP duct (honeycomb sandwich or insulation board sandwich) is called sandwich duct. There are also air ducts made of brick, concrete, slag gypsum board and other materials. 2. Various tuyeres. In order to send air into or out of the room, various types of air supply ports or air suction ports are set on the ventilation pipes to adjust the amount of air sent in or sucked in. There are many kinds of tuyeres. The common type is rectangular tuyere with mesh and strip grille, with linkage adjustment device, while other types have no linkage adjustment device. Tuyere can be divided into single layer, double layer, triple layer and different types of diffusers. 3. Valve. The ventilation component installed on the air duct is used to adjust the air volume and close the individual branch pipes. Commonly used valves in ventilation and air conditioning engineering include cartridge valve, butterfly valve, multi-leaf regulating valve, disc start valve, air treatment room bypass valve, fire valve, check valve and so on. 4. Flexible short pipe (hose connector). It is mostly used to connect the air duct with the equipment, and its main function is to stretch and isolate the vibration of the fan and prevent the noise generated by the vibration transmitted to the room through the air duct. The general length of the flexible short pipe is150-250mm. Local exhaust hood. The main function is to remove waste heat from the equipment. The most common partial exhaust hoods are umbrella exhaust hoods, side exhaust hoods and exhaust cabinets. 6. Water deflector. The water deflector is one of the components that make up the water spraying room, which is divided into two types: front water deflector and rear water deflector. The function of the front water deflector is not only to stop the water droplets that may splash in the process of water spraying, but also to make the air entering the water spraying room flow evenly through the whole section, so it is also called wind deflector or wind deflector or water-gas separator. The back baffle plays the role of dehydration and is generally made of galvanized steel plate or glass plate. 7. Air filter. It is a kind of equipment for dust removal and purification of air sent into the room, which is divided into primary (pre-filtration) and medium-high efficiency filters. 8. Muffler. A device used to prevent noise from entering a room. In air conditioning engineering, there are resistive acoustic emitters, resistive acoustic emitters, vibrating silencers and broadband composite silencers. 9. Vacuum cleaner. It is a kind of air purification equipment, which is generally divided into cyclone dust collector, wet dust collector and bag dust collector. 10, ventilator. It is a machine that forces air to flow in a mechanical ventilation system. Fan is the main equipment of ventilation and air conditioning system, which can be divided into axial flow fan and centrifugal fan according to the construction principle. 1 1, air conditioning and refrigeration system. The installation forms of refrigeration system introduced by Century Star generally include: ① Single installation, that is, installation of refrigeration compressor, condenser, evaporator and various auxiliary equipment, which are connected by refrigeration pipes to form a refrigeration system, which is called centralized supporting refrigeration system; ② Integral installation, that is, the refrigerator, condenser, evaporator and various auxiliary equipment are assembled on the same base by the manufacturer to form an integral installation form. 12, shower room. It is a multifunctional air conditioning equipment, which can be made of steel plate or concrete. Equipped with nozzles, pipes and fittings for supplying water to the nozzles, and the lower tank is equipped with drainage, overflow, filtration and water absorption devices. 13, blind note. Used to block the entry of outdoor sundries, shelter from rain, and cooperate with decoration. 14, heater. It is a device to ensure that the air sent into the room has a certain required temperature and relative humidity, and it is divided into a primary heater and a secondary heater. The heater used in front of shower room or surface cooler is called primary heater, which is used to raise air temperature and increase moisture absorption capacity. The heater used behind the shower room or surface cooler is called secondary heater, which is used to heat the air behind the shower room to reach a certain required temperature and relative humidity. 15, Hood. It is used at the end of the exhaust system to discharge the dirty air outside. According to its form, it can be divided into umbrella hood suitable for general mechanical exhaust system, cone hood suitable for dust removal system and simple hood suitable for natural exhaust system.