The semi-hermetic piston condensing unit is a key equipment widely used in small and medium-sized refrigeration systems. It consists of a semi-hermetic piston compressor, condenser, liquid receiver, and electronic control system. Its core component, the semi-hermetic piston compressor, features a compact structure, with the motor and compressor integrated for ease of maintenance and stable operation, making it suitable for medium and low temperature conditions. The unit compresses refrigerant through the reciprocating motion of the piston, and after heat dissipation and liquefaction through the condenser, it outputs cooling capacity. It boasts high energy efficiency, strong pressure resistance, and adaptability to variable loads, and is commonly used in cold storage, supermarket display cabinets, food processing, and other scenarios. Some models use environmentally friendly refrigerants (such as R404A, an alternative to R22), and are equipped with intelligent protection modules to ensure low noise and long-life operation, making them a reliable choice in the commercial and industrial refrigeration fields.