Refrigeration Principle Diagram of Container Houses

The refrigeration principle of container houses is similar to that of general refrigeration systems, with the core being the transfer of heat through the circulation of refrigerant. The specific principle can be referred to the logic of the following general refrigeration system diagram:

1. Core Components of the Refrigeration Cycle

• Evaporator: Located inside the container house, the liquid refrigerant absorbs heat from the air and evaporates into a gaseous state here. This process significantly reduces the temperature of the surrounding air, achieving a cooling effect. For example, the design of the evaporator in refrigerated containers must ensure sufficient contact between the refrigerant and the air for efficient cooling.
• Compressor: Compresses the gaseous refrigerant into a high-temperature, high-pressure gas, elevating its energy state and providing the driving force for subsequent condensation and heat release. The compressor is the 'heart' of the refrigeration cycle, and its efficiency directly affects the overall refrigeration effect.
• Condenser: Typically installed outside the container, the high-temperature, high-pressure gaseous refrigerant releases heat to the external environment here and condenses into a liquid state. The heat dissipation efficiency of the condenser depends on the ambient temperature and air circulation.
• Expansion Valve (or Throttling Device): Controls the flow rate of the liquid refrigerant, causing a sudden drop in pressure before it enters the evaporator, where part of the refrigerant vaporizes and absorbs heat, preparing for the next round of evaporation.

2. Complete Process of the Refrigeration Cycle

1. Evaporation and Heat Absorption: The liquid refrigerant absorbs heat from the air inside the container in the evaporator and vaporizes into a low-temperature, low-pressure gaseous state.
2. Compression and Temperature Rise: The gaseous refrigerant is compressed by the compressor, and its temperature and pressure rise sharply, turning into a high-temperature, high-pressure gas.
3. Condensation and Heat Release: The high-temperature gaseous refrigerant releases heat to the external environment in the condenser and condenses into a high-pressure liquid state.
4. Throttling and Pressure Reduction: The liquid refrigerant is throttled by the expansion valve, reducing its pressure. Part of the refrigerant vaporizes and absorbs heat, forming a low-temperature, low-pressure wet steam mixture that re-enters the evaporator.

3. Special Considerations for Refrigeration in Container Houses

• Sealing: Container houses must be tightly sealed to prevent cold air leakage and the intrusion of external hot air, which would otherwise reduce refrigeration efficiency and increase energy consumption.
• Insulation Materials: The walls and roof should use high-efficiency insulation materials (such as polyurethane foam) to reduce heat transfer and maintain a low-temperature environment inside.
• Temperature Control: A temperature control system monitors the indoor temperature and automatically adjusts the operating frequency of the compressor or the flow rate of the refrigerant to achieve precise temperature control.

For specific principle diagrams, refer to the general diagrams of refrigeration systems. The core logic is consistent with the above process, and only the component layout and parameters need to be adjusted according to the actual size and purpose of the container house.