The basic knowledge of air compressors includes the following aspects:  

1. Definition and Applications: An air compressor is a device that converts the kinetic energy of a prime mover into the pressure energy of gas. It is commonly used as a power source for pneumatic tools, pipeline transportation, and pressure filling of gas cylinders. Air compressors are widely applied in various fields such as industry, construction, healthcare, transportation, and agriculture, providing power for pneumatic tools while also being used for gas cylinder filling and pipeline transportation.  

2. Classification: Based on working principles and application requirements, air compressors can be categorized into piston-type, screw-type, sliding-vane-type, scroll-type, and others. Different types of air compressors have distinct characteristics and application ranges. For example, piston-type air compressors are suitable for low-flow, high-pressure scenarios, while screw-type air compressors are better suited for high-flow, low-pressure applications.  

3. Structure: The main body of an air compressor is typically made of cast iron or steel plates to support and secure other components. Inside the body, key moving parts such as cylinders, crankshafts, and connecting rods are installed, along with auxiliary systems like lubrication, cooling, and intake/exhaust systems. The transmission system connects the compressor's main unit and the motor, transferring the motor's rotational motion to the main unit. The air path system is a critical part of the air compressor, responsible for the processes of intake, compression, and exhaust.  

4.Performance Parameters: The performance parameters of an air compressor include displacement, pressure dew point, noise level, energy efficiency rating, etc. These parameters directly affect the selection and operational effectiveness of the air compressor.  

5. Maintenance and Care: Regular maintenance and care of an air compressor can extend its service life and improve efficiency. Maintenance tasks include cleaning filters, inspecting seals, replacing lubricating oil, and more.