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Air-cooled refrigerator and energy-saving defrosting control method thereof

An air-cooled refrigerator and weathering technology, which is used in defrosting, household refrigeration devices, lighting and heating equipment, etc., can solve the problems of air-cooled refrigerators that cannot be achieved, the speed of the fans cannot be adjusted, and the fine adjustment of refrigerator operation cannot be achieved. The effect of preventing bad working process, prolonging the time of returning to weathering and defrosting, and avoiding bad working process

Active Publication Date: 2012-09-19
HENAN XINFEI ELECTRICAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Frost-free refrigerators have their advantages: cooling is faster; but at the same time, they also have their fatal disadvantages: non-stop blowing air can easily cause the surface of food to dry out, and it needs to defrost the evaporator through an electric heater regularly, and the power consumption is relatively high
[0009] The above-mentioned refrigerators have the following defects: 1. When the gas in the refrigerator is used to defrost the evaporator, the cold air blown back into the refrigerator cannot meet the demand for cold air in the refrigerator, but there are no corresponding measures to prevent the refrigerator room from being too high; When the refrigerating room is larger than the freezing room, when the temperature of the freezing room meets the requirement, the temperature of the refrigerating room often does not meet the requirement.
[0010] 2. This kind of refrigerator may have the following bad working process of dead cycle during work: the frost layer of the evaporator is too thick, so that the heat exchange efficiency is too low, resulting in the continuous operation of the refrigerator, but the temperature of the freezer cannot be lowered to the set value value, so the defrosting program cannot be started; because the defrosting program cannot be started, the frost layer of the evaporator will accumulate thicker and thicker, resulting in a further reduction in heat exchange efficiency, so that the temperature of the freezer can never reach the lower value required to trigger defrosting
However, there is no air-cooled refrigerator that can dynamically adjust the fan speed according to the changes of the above three factors, that is, the existing air-cooled refrigerator cannot fine-tune the operation of the refrigerator

Method used

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Embodiment Construction

[0033] Such as figure 1 As shown, the air-cooled refrigerator of the present invention includes a refrigeration system, an electric control device 2, a sensing device, a refrigerating chamber 3, a freezing chamber 4 and an air duct system. The refrigeration system includes an evaporator 1 . The air duct system includes an air duct 5, a fan 6 arranged in the air duct 5, a refrigerating chamber damper 7, and an air return port 12; the sensing device includes a refrigerating chamber temperature sensor 11, a freezing chamber temperature sensor 8 and an evaporator temperature sensor. Sensor 9; the electronic control device 2 is provided with a timing part, and the timing part includes a compressor operation timer 2A, a preparation timer before defrosting 2B, a return air defrosting timer 2C and an electric heating defrosting timer 2D. The refrigerating chamber temperature sensor 11 is arranged at the bottom of the refrigerating chamber, and the freezing chamber temperature sensor ...

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PUM

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Abstract

The invention discloses an air-cooled refrigerator which comprises a refrigeration system, an electrical control device, a sensing device and an air duct system, wherein the sensing device comprises a refrigerating chamber temperature sensor, a freezing chamber temperature sensor and an evaporator temperature sensor; and a timing part arranged in the electrical control device comprises a compressor operation timer, a defrosting pre-preparation timer, an air return defrosting timer and an electrical-heated defrosting timer. The invention also provides an energy-saving defrosting control method of the air-cooled refrigerator. The energy-saving defrosting control method comprises the following steps of: entering a defrosting program; performing defrosting pre-preparation; performing air return defrosting; performing electrical-heated defrosting; and finishing defrosting. According to the air-cooled refrigerator and the air return defrosting control method thereof provided by the invention, signals of each sensor can be received by the electrical control device, the state of each timer can be monitored, fine control over a compressor, a fan and the like can be realized, over-high temperature of a refrigerating chamber, caused by air return defrosting, is prevented, a preservation effect of the refrigerator is reduced, and meanwhile, a closed-loop type poor working process is prevented.

Description

technical field [0001] The invention relates to an air-cooled refrigerator and an energy-saving defrosting control method thereof, in particular to a control method utilizing return air defrosting. Background technique [0002] Frost-free refrigerators, also known as intercooled refrigerators or air-cooled refrigerators, use fans to force convection circulation of cold air to indirectly refrigerate and freeze food. [0003] Structurally, the existing air-cooled refrigerator includes a refrigeration system, an electric control device, an air duct, a built-in fan in the air duct, a freezer room, a refrigerator room, a temperature sensor for the refrigerator room, and a temperature sensor for the freezer room. Compressor outlet, condenser, throttling device (capillary, throttle valve, etc.), evaporator, compressor inlet connected in sequence. The electronic control device receives the signal from the sensor, and controls the start and stop of the compressor, fan, etc. There a...

Claims

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Application Information

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IPC IPC(8): F25D29/00F25D21/06
CPCF25D21/08
Inventor 宋新洲范志军
Owner HENAN XINFEI ELECTRICAL EQUIP
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