Refrigerator photoelectric frost and ice sensor controller

Abstract

The invention relates to a photoelectric sensor, and discloses a photoelectric frost and ice sensor controller for an air-cooled refrigerator, which includes a controller body installed on an evaporator pipe of the air-cooled refrigerator, and the controller body is connected with a signal conditioning circuit , the controller body is provided with a transmitting light guide hole, a receiving light guide hole and a lead wire sealing groove, and two light-transmitting sealing plates are respectively provided at the openings of the transmitting light guide hole and the receiving light guide hole, and the controller body is provided with The detection panel, the surface of the light-transmitting sealing plate is flush with the detection panel, a light-emitting diode is arranged in the emitting light guide hole, a photodiode is arranged in the receiving light guide hole, the electrodes on the light-emitting diode and the photodiode are welded with cables, and The signal conditioning circuit is connected. The invention has the advantages of simple structure, convenient installation and low cost, which solves the problem of high misjudgment rate of defrosting controlled by timers in existing refrigerators, and achieves the effect of energy saving.

Description

technical field [0001] The invention relates to a photoelectric sensor, in particular to a photoelectric frost and ice sensor controller for an air-cooled refrigerator. Background technique [0002] With the improvement of people's living standards and the requirements for living comfort, air-cooled refrigerators are more and more popular. Air-cooled refrigerators use fans to make cold air forced convection circulation to indirectly refrigerate and freeze food. Due to this refrigeration method, The moisture evaporated from the food in the refrigerator is taken away by the cold wind, and freezes on the surface of the evaporator to form a frost layer when passing through the evaporator. The existence of the frost layer will affect the cooling performance and even block the circulation of the air. [0003] When the evaporator in the air-cooled refrigerator is frosted, due to the low thermal conductivity of the frost, once frosted, the frost on the surface of the evaporator of ...

AI Technical Summary

Problems solved by technology

In Australia, infrared detection equipment has been used to detect the thickness of frost, but the price is extremely high, and it has not been applied to the refrigerator and other home appliance markets.

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