HVAC related knowledge: ventilation and air conditioning engineering system components of the composition and role

Update:29 Aug 2017

1, ventilation pipe. In the ventilation system, rely on […]

1, ventilation pipe. In the ventilation system, rely on the ventilation pipe to send or withdraw air. The cross-section of the vent pipe is round and rectangular. Ventilation pipe in addition to straight tube, by the elbow, back and forth bending, turning, three, four, and other fittings according to the actual needs of the combination of engineering. Ventilated air conditioning works in the common ducts are ordinary thin steel plate, galvanized steel sheet, stainless steel plate, aluminum and other metal duct, hard polyvinyl chloride plastic sheet, plastic composite steel plate (by ordinary steel plate surface sprayed on a house 0.2-0.4 Mm thick plastic layer and fiberglass duct, etc .. FRP duct is divided into two types of insulation and non-insulation, non-insulation of the glass fiber duct is called fiberglass duct, with insulation layer (ie, honeycomb sandwich or insulation board) FRP Air duct is called sandwich structure duct. In addition to brick, concrete, slag gypsum board made of duct.
2, all kinds of tuyere. In order to feed the indoor or indoor discharge of air, in the ventilation pipe provided on the various types of air outlet or suction port to adjust the amount of air into or out. There are many types of tuyere, the commonly used type is filled with mesh and bar grille rectangular tuyere, with linkage adjustment device, the other types of linkage control device is not linked. The outlet is divided into single, double, three and different forms of diffuser.

3, the valve. Installed on the ducts to regulate the air volume and close the individual manifolds. Ventilation and air conditioning works commonly used valves are flanged valves, butterfly valves, multi-leaf control valve, round open valve start valve, air treatment chamber bypass valve, fire valve and check valve,

4, flexible short tube (hose connector). Used for the connection of the duct and the equipment, its main role is to play the role of stretching and isolation to prevent the vibration of the fan through the duct to the room caused by noise, flexible short pipe of the general length of 150-250mm.

5, local exhaust hood. The main role is to exclude the waste heat from the equipment. Local exhaust hood is the most common with umbrella exhaust hood, side exhaust hood and exhaust cabinet several.

6, the water board. The water retaining plate is one of the components that make up the water spray chamber, which is divided into two types: the front retaining plate and the rear water plate. The role of the front flap in addition to blocking the water spray process may splash up the water droplets, but also to enter the water chamber evenly through the entire section of the air, it is also called wind board or wind guide plate or water separator. After the water plate from the role of dehydration, generally made of galvanized steel or glass plate.

7, air filter. Is a kind of air into the room for dust removal of air equipment can be divided into early effects (pre-filter), medium efficiency, high efficiency filter.

8, muffler. To prevent the introduction of noise into the indoor device. In the air conditioning project used in the resistive picker, resistance along with the sound, resonant muffler and wide band composite muffler and so on.

9, dust collector. Is a kind of equipment to purify the air, generally divided into cyclone dust collector, wet dust collector and bag filter.

10, fan. Is a mechanical ventilation system to force the flow of air machinery. Ventilator is the main equipment of ventilation and air conditioning system, according to the structural principle is divided into axial fan and centrifugal fan two categories.

11, air conditioning and refrigeration system. Refrigeration system installation in general are:

① single-type installation, that is, refrigeration compressors, condensers, evaporators and a variety of auxiliary equipment and other components installed after the installation of refrigeration pipes composed of refrigeration systems, centralized dispensing refrigeration system;

② The overall installation of the refrigerator, condenser, evaporator and a variety of auxiliary equipment are assembled by the manufacturer in the common base to form the overall form of installation.

12, shower room. It is a multi-functional air-conditioning equipment, can be made of steel or concrete, with a nozzle and nozzle to the water supply pipes, accessories, etc., the lower pool with drainage, overflow, water and water absorption device.

13, shutters. To block the entry of outdoor debris and shelter, with decoration and so on.

14, heater. Is to ensure that the air into the room has a certain temperature and relative humidity requirements of the equipment, divided into a heater and secondary heater. The heater used in the front of the water chamber or surface cooler is called a heater to increase the air temperature and increase the moisture absorption capacity. The heater used in the shower room or surface cooler is called a secondary heater, which is used to heat the air after the shower room and has a certain temperature and relative humidity.

15, hood. It is used at the end of the exhaust system and its role is to remove contaminated air from the outside. In its form, there are umbrellas hoods for general mechanical exhaust systems, tapered hoods for dust removal systems, and simple hoods for natural exhaust systems.

16, cooler. The surface cooler with low temperature water and salt water as the refrigerant is called water-cooled surface cooler;

17, flange (referred to as flange). Is the connection between the ducts or between the duct and the fittings. Used between the air duct and the connecting parts between the duct and the fitting. For ducts and ducts and accessories between the extended connection, and can increase the duct strength. According to its cross-section shape can be divided into circular flange and rectangular flange.