Frostless refrigerator capable of defrosting through coupling of ultrasonic waves and super-hydrophobic materials, and control method of frostless refrigerator

Abstract

The invention discloses a frostless refrigerator capable of defrosting through coupling of ultrasonic waves and super-hydrophobic materials, and a control method of the frostless refrigerator. The frostless refrigerator comprises a master controller, an evaporation chamber, a refrigerating chamber, a cold storage chamber, a compressor, a drainage device, an environmental temperature sensor and a magnetic sensitive control air valve, wherein the master controller is separately connected with a ultrasonic wave oscillation system, the compressor, an electric heater, the magnetic sensitive control air valve, a fan, the environmental temperature sensor, a refrigerating chamber temperature sensor, an evaporator temperature sensor and a cold storage chamber temperature sensor, and the ultrasonic wave oscillation system and the electric heater are defrosting devices; the surface of an evaporator, the surface of a refrigerating chamber air channel, the surface of a refrigerating chamber air-return vent, the surface of a cold storage chamber air channel, and the surface of a cold storage chamber air-return channel are made from super-hydrophobic materials. According to the frostless refrigerator and the control method thereof disclosed by the invention, frosting surfaces are treated by using the super-hydrophobic materials, ultrasonic waves and electric heating are coupled, on-line defrosting is performed in a manner that the frostless refrigerator does not stop, the stable running environment of the refrigerator is guaranteed, and the service life of the refrigerator is prolonged.

Description

technical field [0001] The invention relates to a frost-free refrigerator using ultrasonic waves coupled with superhydrophobic materials for defrosting and a control method thereof, in particular to materials for reducing frosting, control rules for automatic defrosting of frost-free refrigerators, and an ultrasonic system for realizing automatic defrosting. Background technique [0002] First of all, when the heat conduction electric heater is used for defrosting in a frost-free refrigerator, because the heat conduction electric heater is embedded in the fin and wraps the evaporator in a large area, the heat is mainly transmitted to the frost layer and the evaporator through the fin, and its melting The frost hysteresis rate was 61.4%. The main body of the radiant convection electric heater is located below the evaporator, and its heat is mainly transferred to the frost layer by radiation and hot air convection. The defrosting hysteresis rate is as high as 83.6%, indicating...

AI Technical Summary

Problems solved by technology

The temperature felt by the thermostat is not the real temperature of the evaporator, but closer to the temperature inside the freezer tank or bubble layer, which always lags behind the temperature change of the evaporator

The temperature felt by the thermostat is always lower than the temperature of the evaporator, which results in an increase in the heat load of the freezer and an increase in power consumption

[0004] Secondly, in the refrigeration cycle system of a frost-free refrigerator, the volume of the freezer compartment of a frost-free refrigerator is generally only 40-70L, but the finned evaporator and complex air duct air supply system take up about 10L of volume, especially the finned evaporator. The thickness of the sheet evaporator takes up quite a lot of depth in the freezer, which makes it inconvenient to store large items in the freezer, which seriously affects the actual use of users.

[0005] Thirdly, the cost of the fin evaporator is relatively high, accounting for 30% of the total cost of the refrigeration system, which relatively increases the market price and affects the consumer spending of users

[0006] At the same time, users reported that due to the complex air supply system and too many loops of ordinary frost-free refrigerators, the noise of the air duct is relatively large, and this kind of noise belongs to the low-frequency spectrum, which is not only difficult to reduce, but also gives users a lingering sense of discomfort

[0007] The application number is 200510093253.9, and the invention patent named "refrigerator" uses an electric heater to heat the frost layer to make the frost layer melt; this kind of technology is widely used and can achieve the effect of defrosting, but the defrosting process will cause the refrigerator The internal temperature rises, which affects the storage quality of food, and the temperature inside the refrigerator rises during defrosting, and the temperature decreases after defrosting, which wastes electric energy

[0008] The application number is 200510021442.5, and the invention patent titled "Defrosting Method, Steps and Devices for Refrigerator Freezer" uses microwave energy to heat the frost layer to melt it; User adds trouble, affects food storage quality, wastes electricity

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