Heat storage unit

The embodiment of the utility model relates to the technical field of heat storage of rotary air preheaters, and discloses a heat storage unit. The heat storage device comprises a heat storage assembly, and a plurality of arc-shaped grooves are formed in the face, making contact with a medium, of the heat storage assembly. According to the heat storage unit, the arc-shaped grooves are formed in the surface of the heat storage unit, so that the contact area between the heat storage unit and a heat exchange medium is increased, and the heat absorption efficiency of the heat storage assembly is correspondingly improved; in addition, the fluid flows in the arc-shaped groove, the resistance in the flowing process is small, and the problem of dust accumulation of the heat storage assembly can beeffectively avoided. 本实用新型实施例涉及回转式空气预热器的蓄热技术领域，公开了一种蓄热单元。其包括蓄热组件，所述蓄热组件与介质接触的面上设置有多个呈弧线型的凹槽。本实用新型提供的蓄热单元，其表面上设置有多个弧线型的凹槽，增大了与热交换介质的接触面积，相应的提高了蓄热组件的吸热效率；而且流体在弧线型的凹槽内流动，流动过程受到的阻力较小，能有效避免了蓄热组件出现积灰的问题。