The whole modular unit Is convenient for directly replacing the unit after the sale. The powerful refrigeration unit can quickly return to a safe temperature to achieve the highest operating quality and the best food preservation effect. Perfect temperature consistency with its innovative airflow design that encircles the food and ensures its proper conservation. Ventilation grille on the front panel improves aesthetics and allows the cooling system to ventilate and operate more efficiently. Hot gas coming from the compressor is used to automatically evaporate defrost water, instead of by means of heating elements, achieving even less energy consumption.