Head system, liquid discharging device, printing device, and method for supplying liquid

A head system comprising:

• a plurality of heads disposed staggered along a first direction;
• a sub-tank which is disposed above the plurality of heads and which is configured to distribute a liquid to each of the plurality of heads;
• a plurality of liquid channels each fluidly connects the sub-tank and one of the plurality of heads;
• a chiller configured to cool the plurality of heads by a coolant, the chiller including a manifold which is disposed between the plurality of heads and the sub-tank in an up-down direction and which extends in the first direction to distribute the coolant to the plurality of heads;
• and
• a casing having a pair of inner surfaces opposed to each other in a second direction orthogonal to the first direction and the up-down direction, the casing housing the sub-tank, the chiller, and the plurality of liquid channels, wherein
• each of the plurality of liquid channels extends linearly parallel to the up-down direction in an entire region between the sub-tank and one of the plurality of heads, and
• each of the plurality of liquid channels and the manifold are aligned in the second direction between the pair of inner surfaces of the casing.