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Ordinary-temp magnetically refrigerating material and its preparing process

A technology of magnetic refrigeration material and manufacturing method, which is applied in the field of refrigeration working medium and its preparation method, to achieve the effect of preventing oxidation

Inactive Publication Date: 2003-02-12
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if room temperature magnetic refrigeration is to go to the market, it must first solve the problems of efficiency, reliability and economy

Method used

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  • Ordinary-temp magnetically refrigerating material and its preparing process
  • Ordinary-temp magnetically refrigerating material and its preparing process
  • Ordinary-temp magnetically refrigerating material and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The room temperature magnetic refrigeration material produced by the present invention is formed by laminating material sheet units with a thickness of 0.1 mm, and the thickness of the formed sheet stack is 5 mm, and the material sheet unit is set every 5 mm between each layer of material sheet unit and the material sheet unit. There is a small circular platform with a diameter of 1 mm and a height of 0.05 mm, so that a channel for liquid flow is formed between the material sheet units. The material sheet unit is composed of upper and lower layers of copper skins with a thickness of 0.01 mm. The gap between the two layers of copper skins is filled with liquid anti-oxidation heat-conducting agent gallium, and the liquid anti-oxidation heat-conducting agent gallium is filled with room-temperature magnetic refrigeration material gadolinium as refrigeration. Working fluid, the particle size of the refrigeration working fluid is 0.005 mm, and there are indentations between th...

Embodiment 2

[0028] Embodiment 2: Its structure and manufacturing method of the room temperature refrigeration material are basically the same as in Example 1, the difference is: the refrigeration working medium is selected superparamagnetic room temperature refrigeration working medium, its particle size is 0.001 mm, and the thickness of the material sheet unit is 0.05 mm. mm, sprinkle spherical metal powder with a particle size of 0.05 mm between the material sheet units, and the thickness of the stack formed after the material sheet units are laminated is 90 mm.

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Abstract

A magnetic refrigerating material for ordinary temp. is prepared from sheet units through laminating. The sheet unit is composed of two metal sheets with boss spots in-between, heat conducting liquid between two sheets, and magnetic refrigerating powder contained in the said liquid. Its preparing process includes such steps as preparing magnetic refrigerating powder, adding it to the heat conducting liquid, sealing the liquid between two metal sheets, pressing and laminating.

Description

1. Technical field [0001] The invention relates to a class of refrigeration working fluid and its preparation method, in particular to the sheet-loading and molding of superparamagnetic refrigeration materials and ferromagnetic materials used for magnetic refrigeration at room temperature and its preparation method. 2. Background technology [0002] The development of modern society and the improvement of the quality of life require a comfortable environment. As the blood of modern science, refrigeration technology has gradually developed and matured in the past 200 years, bringing comfort and enjoyment to human life, and also providing science and technology. Research and Use the Platform. Since one-third of human energy is consumed in refrigeration, the state of refrigeration technology is of paramount importance to human survival. Refrigeration technologies mainly include liquid vaporization refrigeration, gas expansion refrigeration, adsorption refrigeration, thermoelec...

Claims

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Application Information

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IPC IPC(8): C09K5/00
Inventor 卢定伟
Owner NANJING UNIV