Natural convection heat transfer type room-temperature magnetic Refrigerator

Abstract

The invention discloses a natural convective recuperative room-temperature magnetic refrigerating device, which is characterized by the following: adapting gadolinium piece group as working substance and neodymium-iron-borax permanent magnet as magnetizing field; placing sheet working substance in the cold-storage liquid to keep still; rotating the magnet to magnetize and demagnetize the working substance gadolinium reciprocally; adapting the magnetothermal effect to refrigerate the working substance. The invention prevents the working substance and case from relative movement, which improves the refrigerating efficiency.

Description

1. Technical field

[0001] The invention relates to the technical field of refrigeration, in particular to the technical field of magnetic refrigeration 2. Background technology

[0002] The application of magnetic refrigeration in the deep and low temperature range has been more than 70 years ago. As early as 1933 (Phys.Rew.43: 768, 1933), the magnetic refrigeration effect was used to obtain ultra-low temperatures below 1K, and the lowest temperature reached 10 -8 K. However, in the high temperature range, especially in the room temperature range, the research and development of magnetic refrigeration technology is progressing slowly. It was not until 1976 that G.V.Brown (J.Appl.Phys.47:3673, 1976) made a pioneering work on room temperature magnetic refrigeration, proving the possibility of room temperature magnetic refrigeration for the first time. G.V. Brown's device is a reciprocating device. Thereafter, W.A.Steyert and J.A.Barclay (J.Appl.Phys, 47:8, 1976) proposed a...

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