Abstract: A heat pipe and a geothermal energy collecting device. The heat pipe includes a sealing member which is provided with channels; a first pipe body, one end of the first pipe body has an opening, and an other end of the first pipe body is sealed by the sealing member, which has a first chamber, first heat transfer members which are connected to the sealing member and located at one side of the sealing member, each of the first heat transfer members has a first cavity; and second heat transfer members which are connected to the sealing member and located at an other side of the sealing member, each of second heat transfer members has a second cavity configured to communicate with the first cavity of a corresponding one of the first heat transfer members via a respective one of the channels.

Abstract: A flat-plate heat pipe and a preparation method thereof, and a heat exchanger are provided. The flat-plate heat pipe includes an upper shell (11) and a lower shell (12); the upper shell (11) and the lower shell (12) are assembled with each other to form a flat-plate shell (10) with a sealed cavity; the sealed cavity is filled with a phase change working medium; a capillary wick (20) is arranged in the flat-plate shell (10); and a surface of the capillary wick (20) has a micro-nano structure. By means of the arrangement of the above capillary wick having the micro-nano structure on the surface thereof, the flat-plate heat pipe has excellent heat conductivity and high resistance to gravity, and is flexible in use and arrangement.