Liquid-cooling block and liquid-cooling block assembly and liquid-cooling heat dissipation device

A liquid-cooling block, comprising a reservoir and a thermally conductive sheet;

• the reservoir having a liquid inlet, a first liquid outlet, a second liquid outlet, and a flow-dividing channel located inside the reservoir;
• a liquid inlet end of the flow-dividing channel being in communication with the liquid inlet, a liquid outlet end of the flow-dividing channel having a first flow-dividing opening and a second flow-dividing opening, the first flow-dividing opening and the second flow-dividing opening each having a diameter less than that of the liquid inlet and the flow-dividing channel;
• the thermally conductive sheet being hermetically fixed to the reservoir to form a closed accommodating chamber therebetween, the thermally conductive sheet being integrally formed with a plurality of fins located in the accommodating chamber;
• the first flow-dividing opening being in communication with the first liquid outlet through the accommodating chamber, the second flow-dividing opening being in communication with the second liquid outlet, wherein when a liquid flows into the flow-dividing channel through the liquid inlet, one part of the liquid flows into the accommodating chamber through the first flow-dividing opening and exchanges heat with the fins and then flows out from the first liquid outlet, and another part of the liquid flows out from the second liquid outlet through the second flow-dividing opening and bypasses the thermally conductive sheet.