Refrigerating and freezing device and aging device thereof

An aging device for a refrigerating and freezing device, for aging objects to be aged therein, comprising:

• an inner housing, defining an aging chamber inside for accommodating objects to be aged;
• an outer housing, disposed outside the inner housing, wherein at least part of a circumferential side wall of the outer housing is spaced apart from at least part of a circumferential side wall of the inner housing to form an air supply channel located outside the inner housing and inside the outer housing, the air supply channel communicates with the aging chamber through a plurality of air supply ports disposed in the circumferential side wall of the inner housing;
• and
• a circulating fan, configured to controllably drive airflow in the air supply channel through the air supply ports towards the aging chamber;
• wherein
• the plurality of air supply ports are arranged on the circumferential side wall of the inner housing in a manner of becoming gradually dense from top to bottom.