Vertical air-cooled multi-temperature zone refrigerator based on rotary magnetic refrigerator and its control method

Abstract

The invention discloses a rotary type magnetic refrigerator-based upright air-cooled multiple-temperature zone refrigerator and a control method thereof. The multiple-temperature zone refrigerator comprises a cold storage chamber and a freezing chamber; a thermometer bulb is built in each of the cold storage chamber and the freezing chamber; when the multiple-temperature zone refrigerator works ina normal refrigeration mode, a rotary type magnetic refrigerator located in an engine room is capable of supplying cold energy for the cold storage chamber and the freezing chamber alternately through heat-exchange fluid and three-way valves; meanwhile, heat is emitted to the environment through a high-temperature heat exchanger; and a motor rotation speed controller and a drive pump rotation speed controller are dynamically adjusted by a controller through a difference value of room temperature and set temperature input by a user to realize automatic efficient temperature control. When the user selects a fast cooling mode, motor rotation speed is set to be maximum rotation speed so as to guarantee that the cold storage chamber and the freezing chamber reach the respective set temperatureas soon as possible; and when the air-cooled refrigerator frosts during operation to worsen refrigeration performance, the controller can automatically judge the condition to enter a defrosting mode;cold storage chamber is defrosted in manner of return air defrosting; and the freezing chamber is defrosted in manner of reverse circulation.

Description

Technical field [0001] The invention relates to refrigeration technology, in particular to a vertical air-cooled multi-temperature zone refrigerator based on a rotary magnetic refrigerator and a control method thereof, which can apply magnetic refrigeration technology to realize refrigerator multi-temperature zone control and automatic and efficient defrosting. Background technique [0002] The vapor compression cycle is currently the most widely used refrigeration technology in the world, and it is widely used in air conditioners, refrigerators and freezers. Since the beginning of the 20th century, the core components such as compressors and heat exchangers in the vapor compression cycle have undergone several generations of development. At present, the best vapor compression refrigeration system has a refrigeration efficiency close to 40%-45% reverse Carnot cycle. The theoretical efficiency. However, vapor compression refrigeration systems use a large number of refrigerants su...

AI Technical Summary

Problems solved by technology

[0005] At present, there is no rotary magnetic refrigerator system and its efficient temperature control and intelligent defrosting scheme applied to multi-temperature refrigerators

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