PIR sandwich panel factory

Many cold storage experience frequent problems after being put into use, such as frost buildup, water leakage, slow cooling, soaring electricity bills, and panel deformation. These are not equipment malfunctions, but rather hidden problems created during the construction phase. Today, we summarize some of the most common mistakes in cold storage construction and provide practical solutions to help you avoid these pitfalls and build a durable, low-consumption standard cold storage facility.   I. Blindly Choosing Low-Priced Materials: Incompatible Panel Thickness and Density with Operating Conditions This is the most common problem. Many people, in an effort to cut costs, choose thin, low-density, inferior insulation panels, or use generic panels regardless of temperature range. Using thin panels in low-temperature cold storage will result in severe cold leakage and thermal bridging, leading to long-term frost buildup and a gradual decline in insulation performance. Furthermore, neglecting flame retardant ratings poses a significant fire safety hazard.   Solution: Select materials precisely according to the storage temperature. For cold storage above freezing, use 50–75mm PU composite panels; for freezing below freezing, use 100–150mm high-density PU composite panels; and for ultra-low temperature quick-freezing, prioritize 150–200mm B1-grade PIR composite panels. Before construction, verify the density, thermal conductivity, and flame retardant rating of the boards to prevent the use of inferior materials.   II. Neglecting Construction Details: Inadequate Sealing and Ground Treatment. Incomplete sealing of board joints, missing seams, and lack of edge reinforcement are major causes of cold air leakage. Furthermore, many small cold storage facilities neglect ground insulation and moisture protection, making them highly susceptible to frost heave, cracking, and arching under low-temperature conditions, directly leading to deformation of the storage structure and door jamming.   Prevention Methods: Ensure thorough sealing of board joints and proper edge reinforcement; low-temperature cold storage floors must be covered with a moisture-proof membrane and a pressure-resistant insulation layer, combined with frost-resistant concrete pouring, and maintain ground flatness to prevent frost damage at its source.   III. Mismatch Between Refrigeration Equipment and Storage Structure. Either pursuing high-power units results in energy waste, or prioritizing low-power units to save money leads to slow cooling, 24-hour full-load operation of units, rapid equipment aging, and high electricity costs. Meanwhile, improper installation of temperature control probes can lead to inaccurate temperature readings and large temperature fluctuations.   Solution: Accurately match the unit model to the cold storage area, storage temperature, and frequency of goods entering and leaving the warehouse, and install temperature control equipment according to regulations to ensure uniform and stable temperature and reduce equipment operating load.   IV. Neglecting Compliance Design and Acceptance Testing Some cold storage facilities are haphazardly laid out, lacking evacuation routes and fire compartments, failing to meet fire safety regulations, resulting in extremely high rectification costs later. Furthermore, many projects are put into use directly after completion, omitting no-load testing and hiding numerous operational hazards.   Solution: Plan the layout in accordance with regulations before construction, reserving safety passages and implementing fire compartments. After completion, conduct a 72-hour no-load temperature measurement and defrosting test to ensure stable temperature and normal equipment operation before putting the facility into use.   Summary: Cold storage construction should prioritize details over low prices. Reasonable material selection, standardized construction, and precise configuration are essential to effectively reduce later maintenance costs, extend the lifespan of the cold storage, and achieve long-term stable and low-cost operation.