Magnetic regenerator, cold accumulation bed, magnetic refrigeration system and magnetic refrigeration control method

Abstract

The invention provides a magnetic regenerator, a cold accumulation bed, a magnetic refrigeration system and a magnetic refrigeration control method. The magnetic regenerator comprises a first magneticheating unit (33) and a second magnetic heating unit (32); the first magnetic heating unit (33) and the second magnetic heating unit (32) are arranged side by side; the first magnetic heating unit (33) comprises a single magnetic heating material; first connectors (31b) are formed in the two ends, in the fluid flowing direction, of the first magnetic heating unit (33); the second magnetic heatingunit (32) comprises multiple layers of magnetic heating materials; the multiple layers of magnetic heating materials are sequentially arranged in the fluid flowing direction; and second connectors (31a) are formed in the two ends, in the fluid flowing direction, of the second magnetic heating unit (32). According to the magnetic regenerator, the adaptability of the magnetic regenerator to the environment temperature can be improved, and the magnetic regenerator can be kept in a good working state within different temperature span ranges.

Description

technical field [0001] The present application relates to the technical field of magnetic refrigeration, in particular to a magnetic cold storage device, a cold storage bed, a magnetic refrigeration system and a magnetic refrigeration control method. Background technique [0002] Magnetic refrigeration technology is a high-tech refrigeration technology, which has been attracting attention both at home and abroad in recent years. Magnetic refrigeration does not rely on gas compression and expansion to change the phase of the working medium to achieve refrigeration like traditional refrigeration technology, nor does it require substances that are likely to cause the destruction of the atmospheric ozone layer and the application of complex gas compressors and other equipment. The reversible magnetocaloric effect of the refrigeration material, also known as the Magnetic Card Effect (Magnetocaloric Effect, MCE), means that the magnetic refrigeration material releases heat to the ...

AI Technical Summary

Problems solved by technology

[0006] Therefore, in order to increase the temperature span of the regenerator, the regenerator should be filled with a variety of magnetic working fluids with different Curie temperatures, and from the hot end to the cold end of the regenerator, the Curie temperature of the magnetic working fluid decreases, which will increase the temperature of the cold storage. The temperature span of the regenerator, but the following problems will arise: Although the multi-layer magnetic working medium will increase the temperature span of the regenerator, it will reduce the cooling capacity of the regenerator at a low temperature. For example, under the condition of the maximum cooling capacity of the system, the temperature span is 0°C , the temperature of the magnetic working medium in the cold storage bed is the same, which determines that only one kind of magnetic working medium can be placed in the cold storage bed. The difference in working temperature is large, the magnetic working medium does not work at the optimal point, and the cooling capacity is low

The Curie temperature of the magnetic working medium at the hot end in the cold storage is a certain value. When the difference between the ambient operating temperature and the Curie temperature is large, the magnetocaloric effect decreases and the cooling performance of the system decreases.

[0009] Due to the different temperature ranges applicable to single-layer magnetic working fluid and multi-layer magnetic working fluid, the current magnetic refrigeration equipment can only meet the cooling performance of the system in the case of a single small temperature span, or the cooling performance of the system in the case of a single large temperature span. The refrigeration performance of the system, when switching from a low temperature cross-environment to a large temperature cross-environment, or from a high temperature cross-environment to a low temperature cross-environment, will lead to a decrease in system performance, making the magnetic working medium less adaptable to the ambient temperature , it is difficult to keep in the best running state all the time

Images