Storage device

A storage device, comprising:

• a box body, wherein the box body has at least one controlled-atmosphere freshness preservation space;
• a gas separator, wherein the gas separator has a controlled-atmosphere membrane, and is configured to:
• suck in a part of air outside the gas separator, and separate more oxygen than nitrogen from the part of air by means of the controlled-atmosphere membrane to form oxygen-rich gas, so that a remaining gas except the oxygen-rich gas in the part of air that enters the gas separator is fed into the controlled-atmosphere freshness preservation space;
• and
• a gas extractor, communicated to the gas separator via a pipe, and configured to enable the oxygen-rich gas to flow out of the gas separator;
• wherein the gas separator further comprises:
• a gas collection box, wherein a horizontally placed support frame is disposed in the gas collection box, the support frame and an upper half box body of the gas collection box together define a first gas collection cavity, and the support frame and a lower half box body of the gas collection box together define a second gas collection cavity;
• wherein
• the controlled-atmosphere membrane is horizontally disposed on the support frame, and is configured to:
• enable more oxygen than nitrogen in the air that enters the first gas collection cavity to pass through the controlled-atmosphere membrane to enter the second gas collection cavity, so as to form the oxygen-rich gas in the second gas collection cavity, and form the remaining gas in the first gas collection cavity;
• three vent holes controllable to be opened are formed in the gas collection box, and are respectively a first vent hole allowing the part of air to enter the first gas collection cavity of the gas separator, a second vent hole allowing the remaining gas to enter the controlled-atmosphere freshness preservation space, and a third vent hole allowing the oxygen-rich gas to flow out of the second gas collection cavity.