door of refrigerator

Abstract

The invention relates to the technical field of refrigeration device ventilation control devices, in particular to a refrigerator air door. The refrigerator air door comprises a hollow air door body and a circuit board. The front side and the rear side of the refrigerator air door body are provided with openings and then are communicated with each other. Two brake seats are arranged in the body as a pair. A wind wheel is arranged between the two brake seats. The outer side faces of the two ends of the wind wheel are provided with brake pads respectively. A rotating shaft penetrates through the center of the wind wheel. The two ends of the rotating shaft penetrate through the brake seats on the corresponding sides to be connected with the air door body in a rotatable mode. The outer edge of one brake seat is provided with a photoelectric sensor. The circuit board is electrically connected with the photoelectric sensor and the brake seats. The refrigerator air door is reasonable in structure, the photoelectric sensor sends brake pad phase signals to the circuit board, the circuit board exerts an adjustable current at a rated angle so that an electromagnetic coil can output variable damping, the wind wheel is correspondingly decelerated and locked at corresponding angles, fuzzy control over the cooling air quantity is achieved, lubricant is not needed, and the refrigerator air door has the advantages of being simple in structure, low in cost, low in fault rate and the like.

Description

technical field [0001] The invention relates to the technical field of ventilation control devices for refrigeration equipment, in particular to a refrigerator damper. Background technique [0002] The damper is the controller used to control the air volume and cooling efficiency of the air-cooled refrigerator. The damper is used to control the air volume of the refrigerator to control the temperature of the refrigerator compartment. At present, the common refrigerator dampers on the market generally include ventilation doors, air volume adjustment blades and motors. Since the dampers are located in the cold and heat control exchange channel, the condensation phenomenon in the refrigerator will have a great impact on the dampers, so some refrigerator dampers are also installed. There are heating wires to improve the working flexibility after frost condensation on the damper. Nevertheless, the damper of refrigerators currently on the market still has the problems of complex ...

AI Technical Summary

Problems solved by technology

Nevertheless, the damper of refrigerators currently on the market still has the problems of complex structure and large air volume adjustment error, and the damper controller needs to provide lubrication for rotating parts in order to improve flexibility, and the use of lubricants is likely to affect the internal environment of refrigerator operation; For some high-end refrigerator dampers, the precise control of the damper through the precision computer motherboard will cause the complexity of the mechanism to increase exponentially, but the cost is high but the effect is not ideal.

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