Automatic door opening device and refrigerator having the same

An automatic door opening device configured to automatically open a door body of a refrigerator, the automatic door opening device comprising:

• a base, a driving source member fixed in the base, two pushing members which have the same structure and are configured to push the door body to be opened, and a transmission body configured to mesh the driving source member with the two pushing members, wherein:
• each of the two pushing members comprises:
• a pushing rod and a first elastic member connected to the pushing rod and arranged away from the door body;
• the transmission body comprises:
• two mechanical clutch gear sets which are meshed with the two pushing members respectively and have the same structure, wherein the mechanical clutch gear set comprises a mechanical master gear meshed with the driving source member, a mechanical slave gear meshed with one of the two pushing members, and a mechanical clutch member for selectively connecting the mechanical master gear and the mechanical slave gear;
• in an initial state, the mechanical master gear is partially engaged with the mechanical clutch member, and is partially meshed with the mechanical clutch member;
• and the mechanical clutch member is separated from the mechanical slave gear;
• in a door body opening process, the mechanical master gear of one of the at least two mechanical clutch gear sets is partially engaged with the mechanical clutch member which is meshed with the mechanical slave gear;
• the driving source member drives the mechanical master gear to drive the mechanical slave gear to be in a transmission state, so that the pushing rod corresponding to the mechanical slave gear is driven to move toward the outside of the base to open the door body, and an acting force toward a distal end of the door body is applied to the first elastic member;
• after the door body is opened, the mechanical clutch gear set that currently drives the door body to be opened is recovered to an initial connection state;
• the mechanical master gear is in a stationary state;
• and the first elastic member applies a tensioning force to a corresponding pushing rod, so that the corresponding pushing rod is driven to move toward the inside of the base, and the mechanical slave gear corresponding to the corresponding pushing rod is driven to rotate backward;
• the mechanical master gear, the mechanical slave gear and the mechanical clutch in each mechanical gear set are arranged coaxially;
• the mechanical clutch member comprises:
• a mechanical clutch portion and a second elastic member that stretches and shrinks in the axial direction of the mechanical clutch portion;
• one end of the second elastic member is detachably connected to the mechanical clutch portion, and the other end of the second elastic member is movably connected to the mechanical master gear or the base;
• in the initial state, the mechanical master gear is partially engaged with the mechanical clutch member, and is partially meshed with the mechanical clutch member;
• and the mechanical clutch member is separated from the mechanical slave gear;
• in the door body opening process, the mechanical master gear is partially engaged with the mechanical clutch member which is meshed with the mechanical slave gear;
• and the second elastic member applies an acting force toward the mechanical master gear to the mechanical clutch portion;
• and
• after the door body is opened, the second elastic member applies a tensioning force to the mechanical clutch portion to drive the mechanical clutch portion to move toward the direction of the mechanical master gear, so that the initial state is recovered.