Efficient heat exchanging type cold storage bed system for magnetic refrigerator

Abstract

The invention relates to the technical field of magnetic refrigerating, and discloses an efficient heat exchanging type cold storage bed system for a magnetic refrigerator. The system comprises a cold storage bed I, a cold storage bed II, a heat exchanging water tank and a heat exchanger, wherein the cold storage bed I and the cold storage bed II are filled with porous magnetic refrigerants; magnetic fields for magnetizing and demagnetizing the magnetic refrigerants are arranged at the outer sides of the cold storage bed I and the cold storage bed II; a valve set A and a valve set B are correspondingly arranged at two ends of the cold storage bed I; a valve set C and a valve set D are correspondingly arranged at two ends of the cold storage bed II; each of the valve set A, the valve set B, the valve set C and the valve set D comprises an one-way magnetic flux valve and an one-way stop valve; a water pump is arranged at a water outlet of the heat exchanging water tank; and the heat exchanging water tank, the cold storage bed I, the cold storage bed II and the heat exchanger are full of heat exchanging mediums. According to the efficient heat exchanging type cold storage bed system for the magnetic refrigerators, low-temperature heat exchanging mediums and high-temperature heat exchanging mediums are circulated through unique ways and cannot be mutually mixed, so that the refrigerating effect can be improved.

Description

technical field [0001] The invention relates to the technical field of magnetic refrigeration, in particular to a cold storage bed system. Background technique [0002] Room temperature magnetic refrigeration is a new type of refrigeration technology. Compared with traditional vapor compression refrigeration technology, room temperature magnetic refrigeration technology does not cause greenhouse effect, does not destroy the ozone layer, is not harmful to the environment, and has high thermodynamic cycle efficiency. Magnetic refrigeration is a refrigeration method that utilizes the magnetocaloric effect. When a solid magnetic substance (a system composed of magnetic ions) is magnetized by a magnetic field, the solid magnetic substance releases heat to the outside; the magnetized solid magnetic substance is then demagnetized, and the solid magnetic The substance also absorbs heat from the outside world. The thermal phenomenon of this magnetic substance in the process of applyi...

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Problems solved by technology

However, in the above-mentioned cold storage bed system, when the magnetic field changes, the low-temperature heat exchange medium and the high-temperature heat exchange medium share the same circulation pipe, which results in the remaining low-temperature heat exchange medium (high-temperature heat exchange medium) and high-temperature heat exchange medium remaining in the pipe. (low temperature heat exchange medium) direct heat exchange, low temperature heat exchange medium and high temperature pipeline (previously flowed by high temperature heat exchange medium and absorb heat management) directly conduct heat exchange, resulting in waste of low temperature heat exchange medium, seriously affecting the cooling effect and refrigeration efficiency, and the flow of the medium is controlled by the solenoid valve. Due to the short period of demagnetization and magnetization, the solenoid valve operates very frequently, and the coil on the solenoid valve will generate a large amount of heat. After the medium enters the heat exchanger, the heat absorption capacity will decrease, thus affecting the cooling effect

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