Principle of Operation of the Piston
Principle of Operation of the Piston Compressor The continuous variation of the working volume, which is made up of the cylinder, the air valve, and the reciprocating piston in the cylinder, completes the work of the piston compressor. Assuming the volume misfortune and energy misfortune in the genuine work of the cylinder blower are not thought of (that is, during an optimal working cycle), the work finished by the driving rod of the cylinder blower can be separated into four cycles: pressure, exhaust, extension and attractions. 2.1 The Compression Method At the point when the cylinder is in the least position (called the inward on target or base right on target), the chamber is overflowing with low-pressure refrigerant fume breathed in from the evaporator, and the pull cycle closes. Driven by the driving rod and associating pole, the cylinder begins to move up. The suction valve is closed at this point, the cylinder’s working volume gradually decreases, the gas inside is compressed, and the temperature and pressure gradually rise. The compression process is the process by which gas rises in the cylinder from the low pressure of suction to the exhaust pressure. Most people think that compression is an isentropic process. 2.2 Exhaust Cycle The cylinder keeps on moving vertical when the tension of the gas in the chamber transcends the strain of the gas in the fumes chamber. When the exhaust valve is opened, the high-pressure steam in the cylinder is forced out at constant pressure until the piston reaches the top position (also known as the outer dead center or top dead center), at which point the exhaust process stops. 2.3 Extension Cycle At the point when the cylinder moves in the chamber, the upper finish of the cylinder doesn’t match with the highest point of the chamber totally, yet there is a sure space to guarantee the security and dependability of its activity. This space is known as the leftover space volume. When the piston moves to the top dead center, the exhaust ends and only a small amount of the high-pressure gas in the cylinder can be discharged because of the residual space volume. At the point when the cylinder moves in the opposite bearing, just when the high-pressure gas grows to a strain somewhat lower than the pull pressure, the attractions valve will open and the low-pressure vaporous refrigerant can enter the chamber.