Abstract: The disclosure is directed to a thermosyphon cooling device having a heat-exchange plate and a plurality of roll-bond fins. An evaporation chamber is defined inside the heat-exchange plate. A heat-exchange surface and a top surface are disposed at two sides of the heat-exchange plate. A capillary structure is arranged in the evaporation chamber, and the capillary structure is corresponding to the heat-exchange surface. The roll-bond fins are arranged upright on the top surface, and a plurality of condensing chambers communicating with the evaporation chamber are defined in each of the roll-bond fins, respectively. Each of the condensing chambers communicates with each of the evaporation chambers through at least one overflow port, respectively, and a working fluid is contained in the condensing chambers. Each of the condensing chambers is extended across the at least one overflow port in a direction perpendicular to a normal line of the heat-exchange plate.

Abstract: A liquid cooling heat dissipation system is provided. The system includes a first heat dissipation device, a first heat absorption device, a second heat dissipation device, a second heat absorption device, and a pump connected with the first heat dissipation device, the first heat absorption device, the second heat dissipation device or the second heat absorption device. The first heat dissipation device, the first heat absorption device, the second heat dissipation device and the second heat absorption device are connected in sequence.

Abstract: A heat dissipating unit includes: a housing defining an inner space therein, a fluid inlet in fluid communication with the inner space and adapted to receive a coolant therein, and a fluid outlet in fluid communication with the inner space and adapted to discharge the coolant therefrom; a plurality of partitioning plates disposed in the inner space so as to divide the inner space into a plurality of compartments that are connected to each other in an end-to-end manner such that the compartments cooperate to form a continuous tortuous channel with two ends respectively connected to the fluid inlet and the fluid outlet; and a plurality of heat dissipating fins that are formed in each of the compartments.