As a result, problems are inevitable in developing countries with their often extreme climate conditions. Especially problematically are longer transport ways with no electricity supply. Together with the phocos AG, the company va-Q-tec from Würzburg constructed an efficiently vacuum-insulated refrigerator for medical products which can be powered independently from electricity supply by using solar energy. For a safe transport of small amounts of medicines a practical outdoor-cool bag has been developed.

Basis of the new cooler is an efficient heat-insulation, working after the principle of the thermos flask and an additonal vacuum by using slabs from pressed quartz powder from which the air is extracted. The box works with an ingenious energy management: the logic circuit automatically detects and manages several thermal conditions.

In areas without electricity supply, the cool box works with solar energy generated from a small fotovoltaic cell. At night and on cloudy days, a rechargable battery or a cold storage maintain the operation. The appliance meets the WHO standard for the climate class of +32 °C.