How to Prevent Heat in Container Houses

Preventing heat in container houses requires a comprehensive approach involving material selection, structural design, and auxiliary facilities:

I. Core Material Selection

1. Sandwich Panel Material Prioritize polyurethane, rock wool, or glass wool sandwich panels due to their low thermal conductivity (e.g., polyurethane ≤ 0.024 W/(m·K)), effectively blocking heat transfer. For example, a 50mm-thick polyurethane foam layer combined with an outer corrosion-resistant color-coated steel plate and an inner fire-resistant gypsum board forms a three-layer insulation system of reflection-blocking-temperature control, making the cabin heat up 22 minutes slower than the outdoors in summer.

2. Material Thickness Optimization Increasing the thickness of the sandwich layer significantly enhances insulation performance. For instance, raising the foam thickness from 30mm to 50mm reduces the wall's heat transfer coefficient from 0.6 W/(㎡·K) to 0.45 W/(㎡·K), approaching 1.8 times the insulation efficiency of traditional brick-and-mortar walls.

II. Structural Design Optimization

1. Thermal Bridge Blocking Technology Design insulation structures at connection points and corners, isolate window and door installation areas, and fill gaps. For example, using double-layer container stacking with staggered levels and leaving ventilation slots at the bottom layer utilizes airflow to carry away heat, reducing the thermal load on the top layer.

2. Shading and Ventilation Systems Install adjustable shading canopies or roof eaves to reduce direct sunlight exposure; set up ventilation slots at the bottom to promote air circulation. For example, a café in Moganshan uses sandwich panels with an aluminum foil reflective layer, combined with shading canopies and ventilation slots, keeping the indoor temperature 5-8℃ lower than the outdoors in the afternoon.

3. Window and Door Optimization Choose double or triple glazing (thermal conductivity ≤ 0.8 W/(㎡·K)) and add sealing strips at the edges to minimize heat leakage. For example, using triple-glazed windows can slow down the winter indoor temperature drop by 40%.

III. Auxiliary Facility Applications

1. Temperature Control Equipment Configuration Equip based on usage scenarios with air conditioners, graphene floor heating, or entrance air curtains. For example, container houses on construction sites can maintain indoor temperatures between 28-30℃ during summer heat by turning on air conditioners, preventing worker heatstroke.

2. Reflective and Thermal Storage Technologies Use high-reflectivity coatings (e.g., aluminum foil reflective layers) on the outer layer to reduce sunlight absorption; adopt phase change materials or thermal storage walls on the inner layer to release stored heat at night, balancing day-night temperature differences. For example, a lakeside B&B uses thermal storage wall design, keeping the indoor temperature drop to only 1.3℃ after 8 hours of closure in winter.

IV. Construction Detail Handling

1. Sealing Enhancement Focus on treating windows, doors, and joint seams, using weather-resistant sealants (replacement cycle of 5-7 years) and waterproof strips to prevent hot air infiltration. For example, cleaning roof leaves annually avoids water accumulation corroding steel plates and causing seal failure.

2. Rust and Corrosion Prevention All cut and welded edges must be ground and coated with epoxy primer + topcoat, with reapplication every 7-10 years in humid southern regions to prevent rusting from reducing insulation performance.