Inner core component of magnetic working medium, cold accumulation bed and magnetic refrigerator

Abstract

The invention provides an inner core component of a magnetic working medium, a cold accumulation bed and a magnetic refrigerator, and relates to the technical field of room temperature magnetic refrigeration. The inner core component comprises a plurality of groups of magnetic working medium pieces and a plurality of connection pieces, the magnetic working medium pieces are provided with a plurality of axially-extending passageways, connection structures connected with the magnetic working medium pieces are arranged on two side of the connection pieces, the magnetic working medium pieces are successively connected in an axial direction through the connection pieces, and the connection pieces are made of heat insulating material. The inner core component has the advantages that by utilizingthe heat insulating connection pieces to connect every two groups of adjacent magnetic working medium pieces, axial heat conductions among the adjacent magnetic working medium pieces are reduced on the premise that fluid flowing is not affected; by the aid of the connection pieces, heat conduction areas among the adjacent magnetic working medium pieces are reduced effectively, and axial heat conductions are reduced furtherly; a generated temperature span of a magnetocaloric effect is kept, and operation performances of the cold accumulation bed and the magnetic refrigerator are improved.

Description

technical field [0001] The invention relates to the technical field of room temperature magnetic refrigeration, in particular to a magnetic working medium inner core assembly, a cold storage bed and a magnetic refrigerator. Background technique [0002] As energy and environmental issues have attracted more and more attention, traditional vapor compression refrigeration has caused environmental problems such as ozone layer destruction and greenhouse effect. Magnetic refrigeration is considered to have the most potential to replace traditional refrigeration with its advantages of environmental protection and high efficiency. One of the techniques of the vapor compression refrigeration cycle. According to the Montreal Agreement, the production and use of fluorine-containing refrigerants will be gradually banned from 2000. Compared with the traditional vapor compression refrigeration, the refrigeration efficiency of magnetic refrigeration can reach 40%-50% of the Carnot cycle ...

AI Technical Summary

Problems solved by technology

[0005] The cold storage bed (magnetic working medium bed) is the key component of the room temperature magnetic refrigerator. Since the magnetocaloric effect of the magnetic working medium generally occurs in a relatively narrow temperature range, it is necessary to move the fluids with different Curie temperatures along the flow direction of the cold storage bed. The magnetic working medium is designed in layers, but due to the large contact area between layers, there is relatively serious axial heat conduction. The axial heat conduction will cause the temperature of the magnetic working medium to change, which reduces the temperature span where the magnetocaloric effect can occur, and affects the magnetic work. The operating performance of the mass bed; especially under the conditions of low operating frequency, low flow rate and small axial length of the cold storage bed

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