As the world's No. 1 brand of piston cold storage compressors, Copeland piston cold storage compressors have been widely recognized by market consumers for their advanced structural design and strong moving parts.

Copeland DLF piston is a reciprocating part in the cylinder block of a piston compressor. The basic structure of Copeland DLF piston can be divided into top, head and skirt. The top of the piston is the main part of the combustion chamber, and its shape is related to the selected combustion chamber form. Flat-top pistons are often used, which has the advantage of small heat absorption area.

Copeland DLF piston can be understood as the "center" of the compressor. In addition to being in a harsh working environment, it is also the busiest one of the compressors, constantly moving from bottom dead center to top dead center and from top dead center. In the reciprocating motion to bottom dead center, the interior of the Copeland DLF piston is hollowed out, which is more like a hat. The round holes at both ends connect the piston pin, the piston pin connects the small end of the connecting rod, and the big end of the connecting rod connects to the crankshaft, connecting the Copeland DLF piston. The reciprocating motion of the DLF piston is transformed into the circular motion of the crankshaft.

There are three wrinkles on the skirt of each Copeland DLF piston to install two gas rings and one oil ring, and the gas ring is on top. When assembling, the openings of the two air rings need to be staggered to play a sealing role. The function of the oil ring is mainly to scrape the excess lubricating oil splashed on the cylinder wall and to evenly spread the lubricating oil. At present, the widely used Copeland DLF piston ring materials mainly include high-quality gray cast iron, ductile cast iron, alloy cast iron, etc.