Air door structure used for refrigerator

Abstract

Provided is an air door structure used for a refrigerator. The air door structure comprises a base, a door frame, and a door sheet. The door frame is installed on the base. The door sheet is installed on the door frame. The middle of the door frame forms a ventilation opening. The door sheet rotates to open or close the ventilation opening, driven by a driving mechanism. The air door structure is characterized in that a side of the door sheet is provided with an isolation pad which separates the side surface of the door sheet from an external air duct, the door frame is internally provided with a seal pad, and the other side of the door sheet compresses the seal pad in a closed door state. Through installing the isolation pad on a side of the door sheet, freezing phenomenon on the door sheet can be effectively prevented without installing a heater, so that the structure of the air door is simpler and cost is lower. After the other side of the door sheet is provided with the seal pad, the door sheet and the door frame have good sealing property under a closed door state. In addition, the air door structure can reduce torque positioning pins bear, prevent a connecting shaft position of an output gear and the door sheet from fracturing, and operation is more reliable.

Description

technical field [0001] The invention relates to a damper structure for a refrigerator. Background technique [0002] Current refrigerators are usually divided into two spaces, a freezer and a freezer. The freezer and the freezer are separated from each other by a partition. An evaporator and a fan room communicating with the evaporator are arranged in the rear wall of the refrigerator. There is an air outlet duct connected to the fan room between the freezer compartment and the refrigerator compartment. The air outlet duct is respectively connected to the freezer compartment and the refrigerator compartment after being divided. Blow directly into the refrigerator and freezer. In order to control the refrigeration of the refrigerator compartment and the freezer compartment, a damper is arranged in the air outlet duct before the branch. Due to the temperature difference between the air outlet duct and the refrigerating room, when the refrigerating room stops cooling, the rel...

AI Technical Summary

Problems solved by technology

In the gear transmission structure of the existing damper, the positioning pin is located outside the output gear, that is, the positioning pin is far away from the center of the output gear, because the farther the positioning pin is from the center of the output gear, the greater the torque that the output gear acts on it. As the torque increases, the output gear and the shaft on the door panel where the output gear is inserted are prone to breakage, which will cause the damper to fail to work properly.

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