Cooling unit

A cooling assembly, comprising:

• a cold plate in contact with a heat generating circuitry;
• a housing on one side of the cooling assembly in a first direction with respect to the cold plate;
• a first wall between the housing and the cold plate;
• a second wall separating a plate chamber defined by the housing and the first wall into a first plate chamber and a second plate chamber adjacent in a second direction orthogonal to the first direction;
• a pump;
• and
• a fourth wall;
• wherein
• the housing includes an intermediate passage connecting the first plate chamber and the second plate chamber;
• the first wall includes:
• a first through hole opposing the cold plate in the first plate chamber;
• a second through hole opposing the cold plate in the second plate chamber and connecting the second plate chamber and intermediate passage;
• and
• a third through hole connecting the first plate chamber and the intermediate passage;
• the pump includes a motor, a casing, and an impeller;
• the impeller is housed in an impeller chamber defined by the fourth wall and the casing;
• the housing includes a pump inflow side flow path connecting the second plate chamber and the impeller chamber;
• the fourth wall includes a suction port connecting the pump inflow side flow path and the impeller chamber;
• and
• the first through hole and the third through hole are arranged to overlap in the second direction.