Rotating bed magnetic refrigeration apparatus

一种旋转磁制冷装置，该装置有一些布置成一个环(21)的磁再生器床(22)，该环绕一个中心轴转动，当环(21)转动时，使每一个床进出由磁铁(29)产生的磁场。利用一个分配阀(24)使传热流体进出再生器床(22)，分配阀通过管道连接到床的热端和冷端，并随床(22)的环(21)一起转动。该分配阀(24)有一个经管道与热端热交换器(34)和冷端热交换器(38)相连的固定阀件。床中有多孔磁热材料，传热流体流过磁热材料。分配阀(24)将传热流体引向磁场外的床的热端，使传热流体流过床，到达其冷端，传热流体在该冷端处返回分配阀(24)。当床处在磁场中时，分配阀(24)将流体引向床的冷端，使传热流体流过床，到达其热端，传热流体在该热端处返回分配阀，这样就完成现行磁再生器的一个循环。流过各个管道的流体只沿一个方向流动，或是保持不动，这样就使管道中的死体积达到最小。 A rotating magnetic refrigeration apparatus has magnetic regenerator beds arranged in a ring that is mounted for rotation about a central axis, such that each bed moves into and out of a magnetic field provided by a magnet as the ring rotates. Heat transfer fluid is directed to and from the regenerator beds by a distribution valve which is connected by conduits to the hot and cold ends of the beds and which rotates with the ring of beds. The distribution valve has a stationary valve member which is connected by conduits to a hot heat exchanger and to a cold heat exchanger. The beds include magnetocaloric material that is porous and that allows heat transfer fluid to flow therethrough. The distribution valve directs heat transfer fluid to the hot end of a bed that is outside of the magnetic field which flows therethrough to the cold end where it is directed back to the distribution valve and, when a bed is in the magnetic field, the distribution valve directs fluid to the cold end of the bed for flow therethrough to the hot end, where the fluid is directed back to the distribution valve, completing an active magnetic regenerator cycle. The fluid flowing through each conduit flows only in a single direction or remains stationary, minimizing dead volume in the conduits.