Abstract: A loop thermosyphon cooling device includes an evaporator, a condenser and a communication assembly. The evaporator includes a heat conducting element and evaporation pipes, and the heat conducting element has through holes, and each evaporation pipe is passed and positioned into each respective through hole. The condenser includes a condensation pipe. The communication assembly includes a first barrel and a second barrel, and both ends of each evaporation pipe are communicated with the first and second barrels, and both ends of the condensation pipe are communicated with the first and second barrels, so that the evaporation pipe, condensation pipe, first barrel and second barrel jointly define a loop. A communication assembly is coupled between the evaporation pipe and the condensation pipe, and the quantity of evaporation pipes and condensation pipes can be increased or decreased as needed, and the thermosyphon cooling device is compact and high heat dissipation efficiency.

Abstract: The present invention relates to a multi-channel flat-tube serpentine heat exchanger and a heat exchange apparatus. The heat exchanger includes a flat pipe, a fin set and a divider assembly. The flat pipe has bending sections and connecting sections. The flat pipe is filled with a working fluid and has channels. The fin set is connected between the connecting sections to increase heat-exchange area of the flat pipe. The divider assembly is connected to the flat pipe to divide the flat pipe into a heat-absorbing region and a heat-releasing region. The working fluid in the heat-absorbing region absorbs heat to evaporate and then flows into the heat-releasing region along the channels. The evaporated working fluid condenses in the heat-releasing region to flow back to the heat-absorbing region along the channels by means of gravity. Therefore, the present invention has a reduced production cost and an increased heat-exchange efficiency.