Active heat regenerator for room temperature magnetic refrigerator

Abstract

The invention discloses an active heat regenerator for a room temperature magnetic refrigerator. The active heat regenerator comprises an insulated housing and a magnetocaloric working medium bed layer arranged inside the insulated housing, wherein the magnetocaloric working medium bed layer is internally provided with mutually parallel micro channels for a heat exchange fluid flowing through linearly and uniformly along the length direction; the heat exchange fluid is a low boiling point fluid, such as R410a, R134a, R407a or R290, that the boiling temperature after pressurization is 20-30 DEG C. The active heat regenerator has the effects and advantages that the heat exchange efficiency of the active heat regenerator is furthest improved, the boiling heat-transfer characteristic is effectively utilized, and the heat convection coefficient between the heat exchange fluid and a magnetocaloric working medium is greatly improved, thus the cold / heat flow time is reduced, and the running efficiency of the room temperature magnetic refrigerator is improved. Moreover, an organic low boiling point working medium is introduced, so that the problem that active rear metals corrode during the machine running process is effectively solved. Therefore the room temperature magnetic refrigerator keeps a smooth and efficient running state during a long-time running process.

Description

[0001] technical field [0002] The patent of the present invention relates to the technical field of new refrigeration technology, and specifically relates to a technology for active regeneration of key components in room temperature magnetic refrigerators to enhance internal heat transfer. Background technique [0003] Energy is the basis for human survival. As the world's primary energy consumption continues to increase, reducing energy consumption and utilizing natural energy has become an important direction of scientific research. With the improvement of people's living standards, refrigeration technology has entered thousands of households. Magnetic refrigeration technology is a new type of refrigeration technology based on the magnetocaloric effect (MCE). Compared with traditional vapor compression refrigeration, magnetic refrigeration is regarded as one of the most potential technologies to replace traditional vapor compression refrigeration cycle due to its advant...

AI Technical Summary

Problems solved by technology

While affecting its magnetization and demagnetization process, in the process of cold and heat flow, it increases the thermal resistance between the magnetocaloric working medium and the heat exchange fluid, which affects the heat transfer efficiency

With the increase of the use time of the magnetic refrigerator at room temperature, the above-mentioned oxidation phenomenon will intensify, and the performance of the magnetic refrigerator will drop sharply.

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