Although the expansion valve is only a relatively small component within an entire cold storage refrigeration system, its importance is extremely high. The expansion valve directly affects whether evaporator liquid supply remains stable and whether refrigeration efficiency operates normally.

In a refrigeration system, the expansion valve is located between the condenser and evaporator, serving as the key control component connecting the high-pressure side and low-pressure side.

If the entire cold storage system is compared to a complete human body, then the compressor is more like the "heart," while the electrical control box is more like the "brain."

This article explains the refrigeration principles of cold storage systems with the help of diagrams and process analysis.