Static type room temperature magnetic refrigerator
A magnetic refrigeration, static technology, applied in refrigerators, machines using electric/magnetic effects, refrigeration and liquefaction, etc., can solve the difficulties in the design and realization of distribution valve components, reduce the cooling effect of magnetic refrigerators, operate and Inconvenient operation and other problems, to achieve the effect of simple structure and operation, easy implementation, and stable operation
Inactive Publication Date: 2005-06-22
TSINGHUA UNIV
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Problems solved by technology
In particular, in the design of a magnetic refrigerator with a static magnetic field and a moving magnetic working medium, an additional distribution valve must be designed to complete the heat exchange between the moving magnetic working medium and the stationary cold and hot end heat exchangers , and the distribution valve components are not only difficult to design and implement, but also produce considerable heat loss, which greatly reduces the cooling effect of the magnetic refrigerator
Therefore, magnetic refrigerators using permanent magnets as magnetic field sources still have major defects, such as large volume, complex structure, and very inconvenient operation and operation.
Method used
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[0017] The structure and principle of the present invention will be further described below in conjunction with the accompanying drawings.
[0018] figure 1 is a schematic diagram of the structure of a static room temperature magnetic refrigerator using electromagnets. The magnetic refrigerator is mainly composed of electromagnet 1, coil 2, heat transfer fluid pipe 3, cold end heat exchanger 4a and hot end heat exchanger 4b (connected with cold and heat sources), and control unit 5. . The electromagnet 1 is made of a energized coil 7 and a permeable magnetic core 8 with an air gap 9; the coil 2 is a disc tube (such as figure 2 As shown), its lead-in end 10a is located at the outer edge of the coil, and its lead-out end 10b is located at the center of the coil. The inlet end 10a and the outlet end 10b of the coiled pipe are respectively connected to the cold and hot end heat exchangers 4a, 4b through the heat transfer fluid pipeline 3 equipped with valves (11a, 11b, 11c, 11...
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A static room-temp. magnetic refrigerator is composed of the electromagnet consisting of coil and iron core with gaps, magnetic medium with giant-magnetic effect at ordinary temp, heat-transfer fluidpipeline, and heat exchanger. Said magnetic medium is contained in coiled pipe installed in the gaps of iron core. The both ends of said coiled pipe are connected via said heat-transfer fluid pipeline to the heat exchanger at cole end and hot end. Its advantages are small size, simple structure and high stability.
Description
technical field [0001] The invention relates to a magnetic refrigerator, in particular to a room temperature magnetic refrigerator using an electromagnet as a magnetic field source. Background technique [0002] Refrigeration technology is widely used in scientific research, production and life. It refers to using artificial methods to make an object or a certain space reach and maintain the required low temperature. The traditional refrigeration technology realizes the transfer of heat by means of the change principle of work and entropy accompanying the compression and expansion of the gas working medium. The disadvantage of gas compression refrigeration is that the gas working fluid used in it usually has a harmful effect on the atmosphere, and the refrigeration efficiency is relatively low due to the use of compressors. [0003] Magnetic refrigeration technology is a technology that aims at the various limitations of gas compression refrigeration and uses the principle ...
Claims
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IPC IPC(8): F25B21/00
CPCF25B21/00F25B2321/0021Y02B30/00
Inventor 丁仁杰陈昱闵勇
Owner TSINGHUA UNIV