A compressor is a driven fluid machinery that elevates low-pressure gas to high-pressure gas and is the heart of a refrigeration system. According to different classification standards, compressors can be classified into various types, each with its own characteristics.
Classified by compression method:
Positive displacement compressor: compresses gas by changing the volume of the working chamber. It can be further divided into reciprocating (piston type, membrane type) compressors and rotary (sliding plate type, screw type, rotor type) compressors. Among them, piston compressors can cope with a wide pressure range and refrigeration capacity, and are technically mature, but they are afraid of liquid shock; Screw compressors are widely used in refrigeration devices such as refrigeration, refrigeration, air conditioning, and chemical processes due to their simple structure, fewer vulnerable parts, low exhaust temperature, and insensitivity to lubricating oil.
Power compressor: Using a high-speed rotating impeller to do work on the gas, the pressure of the gas is increased under the action of centrifugal force. Among them, centrifugal compressor is a type of blade rotary compressor (i.e. turbine compressor), which has the advantages of large gas processing capacity, small volume, simple structure, balanced operation, low vibration, no need for special foundation, few vulnerable parts, easy maintenance, and large single machine capacity.
Classified by structural type:
Semi enclosed compressor: The entire compressor is installed in one casing, which has the advantages of compact structure, good sealing, and low noise.
Double rotor compressor: With fewer vulnerable parts and reliable operation, it is widely used in household appliances.
Vortex compressor: mainly composed of moving disc (vortex rotor), stationary disc (vortex stator) and other components, it has the advantages of simple structure, smooth operation, high efficiency, and low noise.
Classified by cylinder arrangement:
Vertical compressors, horizontal compressors, etc., are mainly classified based on the installation position and arrangement of cylinders.
Classified by cooling method:
Water cooled compressors, air-cooled compressors, etc., these classifications are mainly based on the cooling method of the compressor.
In addition, there are some special types of compressors, such as rotary compressors (including slide, rotor, and screw types), jet compressors, etc. Each type of compressor has its own unique working principle and application scenarios, and users can choose the appropriate compressor type according to their actual needs.
In short, there are various types of compressors with their own characteristics. When selecting a compressor, it is necessary to comprehensively consider the specific application scenario and requirements to ensure that the performance of the compressor meets the requirements and has good reliability.
