Piston air compressor

When the reciprocating piston in the cylinder of the piston air compressor moves to the right, the pressure in the left cavity of the piston in the cylinder is lower than the atmospheric pressure p a, the suction valve opens, and the outside air is sucked into the cylinder. This process is called the compression process. When the pressure in the cylinder is higher than the pressure p in the output air pipe, the exhaust valve opens. The reciprocating movement of the piston is formed by a crank slider mechanism driven by an electric motor. The rotary motion of the crank is converted into sliding-the reciprocating motion of the piston. The compressor of this structure always has a residual volume at the end of the exhaust process. In the next inhalation, the compressed air in the remaining volume will expand, thereby reducing the amount of air inhaled, reducing efficiency, and increasing compression work. The structure is simple, the service life is long, and it is easy to achieve large capacity and high voltage output.

Piston air compressors have a variety of structural forms. According to the configuration of the cylinder, there are several types: vertical, horizontal, angle, symmetrical and opposite. According to the number of compression stages, it can be divided into three types: single-stage, double-stage and multi-stage. According to the setting mode, it can be divided into two types: mobile type and fixed type. According to the control mode, it can be divided into two types: unloading type and pressure switch type. Among them, the unloading control method means that when the pressure in the air storage tank reaches the set value, the air compressor does not stop running but opens the safety valve to perform non-compression operation. This idling state is called unloading operation. The pressure switch control method means that when the pressure in the gas storage tank reaches the set value, the air compressor automatically stops running.