Compressor type and development history
The compressor is often referred to as the heart of a refrigeration system, and the term "vapor pump" is commonly used to describe its function. Essentially, the compressor's main role is to raise the pressure of the refrigerant vapor from the suction pressure level to the discharge pressure level, enabling the refrigeration cycle to continue efficiently. The compression ratio is an important parameter that reflects the pressure difference between the high-pressure and low-pressure sides of the system. It is calculated by dividing the absolute pressure on the high-pressure side by the absolute pressure on the low-pressure side. Using absolute pressure is crucial here, as it ensures the result is always a positive number. If gauge pressure were used instead, negative values could occur, which would not make sense in this context. In the refrigeration and air conditioning industry, there are five primary types of compressors: reciprocating, screw, rotary, scroll, and centrifugal. Each has specific applications based on system size and requirements. Reciprocating compressors are widely used in small to medium commercial systems due to their reliability and cost-effectiveness. Screw compressors, on the other hand, are more common in large-scale commercial and industrial setups because of their efficiency at higher capacities. Rotary, scroll, and reciprocating compressors are frequently found in residential and small commercial air conditioning units, while centrifugal compressors are ideal for large buildings and HVAC systems where high cooling capacity is required. Reciprocating compressors come in various designs, typically classified by the housing structure and the arrangement of the drive mechanism. They can be either open or semi-hermetic. Open compressors have a separate motor and compressor unit, making them easier to service. Closed or semi-hermetic compressors, however, enclose both the motor and the compressor within a single housing, offering better sealing and reducing the risk of refrigerant leaks. This design is especially useful in applications where leakage prevention is critical. Condensate Pump,Industrial Condensate Pump,Condensate Transfer Pump,Centrifugal Condensate Pump Shenyang pump products sales co., LTD , https://www.syipsc.com