Types Of Compressors And How They Work

- May 05, 2019-

The compressor is the "heart" of the air conditioning refrigeration system, and the circulation or flow of the refrigerant is achieved by the operation of the compressor. Once the compressor is stopped, the refrigeration process ends. The compression process of the compressor to the refrigerant is: the compressor sucks the evaporated saturated gas from the evaporator, the pressure and temperature are increased after being compressed by the compressor, and then the supersaturated vapor of high temperature and high pressure is discharged into the condenser. Condensate. At present, the compressor can be roughly divided into a reciprocating piston type, a rotary piston type, a scroll type and a frequency conversion type.

Reciprocating piston working principle: Reciprocating piston compressor consists of cylinder, piston, exhaust valve, suction valve, connecting rod and crankshaft. Its volume can be changed.

The compressor coil is energized, the motor drives the crankshaft to rotate, and the piston reciprocates through the transmission of the connecting rod. The working volume formed by the inner wall of the cylinder, the cylinder head and the top surface of the piston periodically changes. When the piston starts to move from the cylinder head, the working volume in the cylinder gradually increases. At this time, the gas pushes the intake valve along the intake pipe and enters the cylinder until the working volume becomes maximum, and the intake valve is closed; When the piston moves in the reverse direction, the working volume in the cylinder is reduced and the gas pressure is increased. When the pressure in the cylinder reaches and is slightly higher than the exhaust pressure, the exhaust valve opens and the gas exits the cylinder until the piston moves to the limit position. The valve is closed. The above process occurs repeatedly when the piston moves in the opposite direction. In short, the crankshaft rotates once, the piston reciprocates once, and the process of intake, compression, and exhaust is successively implemented in the cylinder, that is, a working cycle is completed.