Magnetic regenerator and manufacturing method thereof, magnetic working medium bed and magnetic refrigeration device

Abstract

The invention provides a magnetic regenerator and a manufacturing method thereof, a magnetic working medium bed and a magnetic refrigeration device. The magnetic regenerator comprises sheet-shaped magnetic working media (1) and particle magnetic working media (2), the multiple sheet-shaped magnetic working media (1) are arranged at intervals, a filling space is formed between every two adjacent sheet-shaped magnetic working media (1), and the filling spaces are filled with the particle magnetic working media (2). According to the magnetic regenerator in the invention, the flow resistance can be reduced, the heat exchange area is increased, and the heat transfer performance is improved.

Description

Technical field[0001]The present application relates to the field of magnetic refrigeration techniques, and more particularly to a magnetic reducing cooler and a method of fabricating a method, a magnetic mass bed and a magnetic refrigeration device.Background technique[0002]Magnetic refrigeration technology is a solid-state refrigeration method based on magnetic heat effect. It uses water and other environmentally friendly media as a heat transfer fluid, with zero GWP, zero ODP, intrinsic, low noise and low vibration, etc., compared to low temperature compression, Within room temperature, the magnetine is cold, such as the application of home refrigerator, air conditioning, medical and health care. So in recent years, Room Temperature magnetic refrigeration technology has been widely attached importance to countries around the world and has achieved some attractive achievements.[0003]Magnetic heat is refrigerated by magnetically heat effect, and most magnetically heat materials are...

AI Technical Summary

Problems solved by technology

However, this is relatively contradictory. A large specific surface area often means high fluid resistance, so a compromise design is required, which requires both a large specific surface area and a small fluid resistance.

[0005] As the core component of the magnetic refrigerator, the magnetic regenerator (regenerator) has a built-in porous medium (magnetic working medium) for the flow of the heat exchange fluid. At present, there are the following problems: the common geometry of the magnetic regenerator so far is limited to simple Packed bed solutions for powder, grain or spherical structures and parallel plate structures

It is difficult to manufacture geometries with better heat transfer performance (such as microchannels, honeycomb structures, different foam porous shapes, etc.) Good heat transfer and flow performance of the magnetic fluid bed structure is very important

[0006] In the Chinese invention patent application document with the publication number CN102466364A, it is mentioned that the sheet-like magnetic working fluid of various shapes is superimposed, which is similar to the parallel plate structure in essence. Although the flow resistance of the sheet-like magnetic working fluid in this scheme is low, it Has the problem of small heat exchange area and low heat transfer performance

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