Compact liquid cooling module for computer server

A liquid cooling module for computer servers, the liquid cooling module comprising:

• an outer housing having a length, a width, and a thickness such that the length is less than twice the width and the thickness is less than half the width, the outer housing having
• four side walls, the side walls including two long walls in the lengthwise direction and two short walls in the widthwise direction,
• a bottom, and
• a cover;
• and
• a plurality of components incorporated in the outer housing, the plurality of components comprising:
• a pump oriented in the lengthwise direction of the outer housing and positioned along one of the long side walls,
• a fan,
• a heat exchanger oriented in the lengthwise direction of the outer housing and positioned along the other one of the long side walls
• at least two ventilation grilles, where at least one ventilation grille is positioned in each short side wall,
• an open central longitudinal space between the pump and the heat exchanger that is configured to facilitate airflow therein from an air intake ventilation grille of the at least two ventilation grilles of one of the short side walls to at least one air discharge ventilation grille of the at least two ventilation grilles of the other one of the short side walls, the airflow being driven by the fan,
• a primary hydraulic circuit configured to supply the liquid cooling module with a fluid coolant,
• a portion of a secondary hydraulic circuit located in the liquid cooling module, for circulating the fluid coolant, the portion of the secondary hydraulic circuit being without a bypass configured to allow the pump to operate as a closed circuit and to clutter the open central longitudinal space, and
• a circuit control board positioned in a longitudinal extension of the open central longitudinal space to be directly swept by the airflow.