The importance of ship refrigeration systems in the ocean transportation industry is self-evident. It is not only the key to maintaining a comfortable internal environment of the ship, but also a necessary condition to ensure that the cargo on board, especially perishable food, remains fresh and safe during long-distance voyages. Therefore, the inspection and maintenance of ship refrigeration systems is undoubtedly an important link in ensuring the safety of ship operations and improving operational efficiency.

Firstly, we need to understand the basic principles and structure of ship refrigeration systems. The ship's refrigeration system is mainly composed of major components such as compressor, condenser, expansion valve, and evaporator, which achieve refrigeration effect through the circulation of refrigerant. The compressor compresses the refrigerant into high-temperature and high-pressure gas, which is then cooled and converted into liquid by the condenser. After being depressurized by the expansion valve, it enters the evaporator and exchanges heat with the object to be cooled, achieving refrigeration.

However, due to various complex environmental conditions encountered by ships during navigation, such as high temperature, high humidity, high salinity, etc., these will have a certain impact on the refrigeration system. Therefore, it is particularly important to regularly inspect and maintain the ship's refrigeration system.

In the maintenance and repair process of ship refrigeration systems, the first step is to conduct a comprehensive inspection of the system. This includes checking the integrity of each component, the tightness of connections, and the adequacy of refrigerant. In addition, it is necessary to monitor the operation of the system, such as the sound of the compressor, the temperature of the condenser and evaporator, etc., to ensure that the system is in good working condition.

In addition to a comprehensive inspection, it is also necessary to clean and maintain various components of the refrigeration system. For example, condensers and evaporators are prone to accumulating dust and dirt, which affects their heat dissipation efficiency and therefore require regular cleaning. At the same time, the oil and refrigerant of the compressor also need to be replaced regularly to ensure its normal operation.

In addition, with the development of technology, more and more new technologies are being applied to the maintenance and repair of ship refrigeration systems. For example, the use of infrared thermography technology can quickly and accurately detect the temperature distribution of refrigeration systems, thereby promptly identifying potential problems. At the same time, the application of intelligent monitoring systems also makes it possible to monitor the operating status of refrigeration systems in real time, greatly improving the efficiency and accuracy of maintenance and repair.

In short, the maintenance and repair of ship refrigeration systems is a complex and important task. Only by fully understanding the basic principles and structure of the system, mastering scientific inspection and maintenance methods, and applying new technologies, can the normal operation of the ship's refrigeration system be ensured, providing strong guarantees for the safe operation of the ship and the preservation of goods.