▎ 摘　　要

NOVELTY - The device has a vacuum heat collection pipe whose outer side is installed with a cylindrical electromagnet. Two ends of a round section of the vacuum heat collection pipe are provided with annular electromagnets, respectively. The cylindrical electromagnet and the annular electromagnets are connected with a power supply and controlled to operate by a controller. The vacuum heat collection pipe is added with a heat collecting working substance of composite magnetic particles. USE - Magnetic field regulation and control type solar heat collecting device for a renewable energy development sector. ADVANTAGE - The device improves magnetic field adjusting effects and solar heat collecting efficiency so as to effectively improve photo-thermal absorption heat transfer efficiency through magnetic nano fluid. The device generates different magnetic fields along different directions to realize dot matrix absorption and rapid heat transfer along the heat channel and ensure high temperature resistance and durability and direct absorption heat collecting optimization functions.