1. Different Insulation Materials for Cold Storage Interiors and Exteriors: Interior insulation in cold storage typically uses polyurethane foam panels due to their low thermal conductivity and good insulation performance. Exterior insulation, on the other hand, can use materials such as polystyrene boards and rock wool. This is because exterior insulation primarily prevents cold air loss, while interior insulation prevents the entry of hot air from the outside; the insulation materials differ.
2. Different Insulation Thicknesses for Cold Storage Interiors and Exteriors: Interior insulation typically requires a thickness of at least 10cm to ensure effective insulation. Exterior insulation requires even greater thickness, generally at least 15cm. This is because the exterior of cold storage is more susceptible to factors such as temperature and wind, necessitating a thicker insulation layer to maintain optimal performance.
3. Different Construction Methods for Cold Storage Interiors and Exteriors: Interior insulation is generally constructed using spraying or panel splicing methods. Exterior insulation can be constructed using methods such as masonry or plastering. This is because internal cold storage insulation requires a smoother and more even surface, while external insulation needs to be more robust and durable.
4. The purposes of internal and external cold storage insulation differ. Internal cold storage insulation primarily prevents hot air from entering, maintaining the low-temperature environment inside. External cold storage insulation, on the other hand, primarily prevents cold air loss, ensuring the internal low-temperature environment is unaffected by external temperatures.
5. Maintenance of internal and external cold storage insulation differs. Internal cold storage insulation is relatively easy to maintain, generally requiring only regular inspection and cleaning. External cold storage insulation, however, requires greater attention to waterproofing and corrosion prevention to ensure the lifespan of the insulation materials.
Compared to ordinary insulation boards, cold storage boards have higher requirements for core material density, metal panel thickness, and fire resistance. Ordinary insulation boards typically have a density below 30 kg/m³, while cold storage boards need to reach over 40 kg/m³ to withstand stress changes under low-temperature conditions; the metal panel thickness increases from 0.3 mm to 0.5 mm, improving impact resistance; and the fire resistance rating is upgraded from Class C to Class B, meeting cold storage safety regulations. These improvements enable it to maintain stable performance even in extreme temperature ranges.
