Magnetic refrigeration heat exchanger and refrigeration heating system and method

Abstract

The invention discloses a magnetic refrigeration heat exchanger and a refrigeration heating system and method. The magnetic refrigeration heat exchanger comprises a rectangular heat exchanger, whereinthe rectangular heat exchanger comprises a heat exchanger shell, a capillary matrix filled with a magnetic working medium is mounted in the heat exchanger shell, and cover plates are mounted at the two ends of the heat exchanger shell and encapsulates the capillary matrix inside the heat exchanger shell; the upper edges of the two side cover plates or the upper heat exchanger shell are processedwith a first through hole for air inlet and exhaust according to different processes in the heat exchanger; the lower edge of the two side cover plates or the upper heat exchanger shell is provided with a second through hole and a third through hole for circulating heat carrying and cooling fluid. The magnetic refrigeration heat exchanger aims at improving the reliability and universality of the heat exchanger and enhancing the heat exchange efficiency.

Description

technical field [0001] The invention relates to the field of magnetic refrigeration devices, in particular to a magnetic refrigeration heat exchanger, a refrigeration and heating system and method integrating packaging and enhanced heat transfer. Background technique [0002] Refrigeration technology accompanies all aspects of human production and life, and traditional gas compression refrigeration technology is currently the most mature and widely used refrigeration technology. In recent years, countries around the world have gradually reached a consensus on issues such as controlling greenhouse gas emissions and the destruction of the ozone layer. According to the Montreal Agreement, each signatory needs to gradually replace and phase out fluorine-containing working fluids. However, it is still difficult to balance the environmental protection, safety issues and cycle efficiency of new working fluids at this stage. As a new type of refrigeration technology, magnetic refr...

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Problems solved by technology

However, the ductility of gadolinium, especially composite materials, is difficult to match with that of copper. During the rolling process, there may be situations such as hollowness, magnetic core leakage, and insufficient strength of the tubes. Moreover, the heat exchanger involved in this patent is not described in detail. Layout, runner, exhaust and other issues are not involved

[0006] At this stage, the magnetic cores of magnetic refrigeration heat exchangers are mainly plate type, tube type and particle type. Generally, the overall porosity is in the range of 0.4~0.6. No matter which type will form microchannel heat transfer, especially the particle type Capillary action is most likely to occur during the filling process to increase the resistance of the heat exchanger

Moreover, there will be liquid storage problems in the heat exchange pipes of the heat exchanger, which will cause the loss of heat or cooling capacity of the magnetic core. As the magnetic refrigeration technology matures and the system scale gradually expands, the heat capacity in the magnetic refrigeration heat exchanger will increase. to a non-negligible extent

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