Air-cooled refrigerated carrier is a special ship used for port-to-port, or between port and water, for the refrigerated transport of frozen and cooled goods (such as meat, fruits, vegetables, etc.) on the water. Refrigerated ships are further divided into refrigerated cabin ships and refrigerated container ships. The cargo compartment of the refrigerated ship is made into a refrigerated compartment, the bulkhead has a good thermal insulation function, and the cargo is placed in the compartment in the form of a pallet or a basket. The refrigeration ship has higher requirements for the refrigeration compressor and the whole refrigeration system. The refrigeration equipment should have higher use safety and reliability, higher pressure resistance, moisture resistance, vibration resistance and impact resistance, as well as certain anti tilting performance. Therefore, a good refrigeration system solution is the absolute key to the construction of refrigerated transport ship.