Defrosting device of refrigerator evaporator

Abstract

The invention discloses a defrosting device of a refrigerator evaporator, and relates to the technical field of refrigeration equipment. The defrosting device comprises a heating plate, a heating wire and a metal bracket; a fan cover is fixedly mounted on the evaporator; the metal bracket is made of memory alloy with a two-way shape memory function; one end of the metal bracket is fixed on the fan cover through a screw; a heating plate is fixed at the other end of the metal bracket through screws; the heating wire penetrates through the metal bracket and is wound on the heating plate; and the two ends of the heating wire are electrically connected with a refrigerator control panel. By means of the characteristic that the metal bracket with the two-way shape memory function presents different specific shapes in the low-temperature environment and the high-temperature environment, the defrosting heater of the refrigerator evaporator is tightly attached to an evaporator front fan cover in the refrigerating process, and the refrigerating effect is not affected; and in the defrosting process, the defrosting heater is tightly attached to a frost layer of the evaporator, and the defrosting device has the advantages that defrosting heat is evenly distributed, and the defrosting efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration equipment, in particular to a defrosting device for an evaporator of a refrigerator. Background technique [0002] During the cooling process of the refrigerator, due to the large temperature difference between the inside and outside of the evaporator surface, a frost layer will form on the surface. The longer the cooling time, the thicker the frost layer. If the evaporator is not defrosted frequently, the working efficiency of the evaporator will be seriously affected, causing the air temperature in the refrigerator to drop slowly, prolonging the working time of the refrigerator, and increasing the energy consumption of the refrigerator. [0003] In a conventional refrigerator defrosting device, a defrosting heater is generally placed at the bottom of the evaporator. After entering the defrosting mode, the heater starts to work, using the heat conduction of the air and the heat radiation o...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a refrigerator evaporator defrosting device, through the metal bracket with double-pass shape memory function, it presents the characteristics of different specific shapes in low temperature and high temperature environments, so that the refrigerator evaporator defrosting heater can be used in the refrigeration process. The front air cover of the evaporator is closely attached, which does not affect the cooling effect; during the defrosting process, the defrosting heater is closely attached to the frost layer of the evaporator, so that the defrosting heat is evenly distributed and the defrosting efficiency is greatly improved; The problem that the cream is not uniform enough

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