REFRIGERATOR FOR SUPPLYING NITROGEN GAS TO A VEGETABLE BOX

摘要

PURPOSE: A refrigerator is provided to supply nitrogen gas to a vegetable box to keep the freshness of vegetable for a long time and increase a dissolved oxygen amount in the water stored in a water tank. CONSTITUTION: A refrigerator includes an air pump(41) mounted to a main body of the refrigerator, and a separation filter(42) supplied with atmospheric air by the air pump and separating oxygen and nitrogen from each other. An oxygen supply tube(44) guides the oxygen gas separated by the separation filter to a water tank to increase a dissolved oxygen amount in the water stored in the water tank. A nitrogen supply tube(45) guides the separated nitrogen gas to a vegetable box.