The main engine of a silent oil-free air compressor generally adopts a miniature reciprocating piston compressor, and its working principle is as follows:

When the motor drives the compressor crankshaft to rotate through the connecting rod, the piston with self-lubrication without adding any lubricant will reciprocate, and the working volume formed by the inner wall of the cylinder, the cylinder head and the top surface of the piston will be Periodic changes occur. When the piston of a piston compressor starts to move from the cylinder head, the working volume in the cylinder gradually increases. At this time, the gas follows the intake pipe and pushes the intake valve to enter the cylinder until the working volume reaches the maximum. , The intake valve is closed.

When the piston of a piston compressor moves in the reverse direction, the working volume in the cylinder decreases and the gas pressure increases. When the pressure in the cylinder reaches and is slightly higher than the discharge pressure, the exhaust valve opens and the gas is discharged from the cylinder until the piston moves to the limit Position, the exhaust valve is closed.

When the piston of the piston compressor moves in the reverse direction again, the above process repeats. That is: the crankshaft of the piston compressor rotates once, the piston reciprocates once, and the process of air intake, compression, and exhaust is realized in the cylinder, which completes a working cycle. The single-shaft and double-cylinder structure design makes the compressor gas flow rate twice that of the single-cylinder when the rated speed is fixed, and the vibration and noise control is well controlled.

However, there are still very few pseudo-quiet oil-free air compressors in the market. They are not the miniature reciprocating piston compressors used. It can be determined with certainty that this type of air compressor is not a quiet oil-free air compressor. Can not meet the requirements of silent oil-free air compressor.

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