Liquid feeding device and inkjet recording apparatus

A liquid feeding device comprising:

• a diaphragm pump configured to convey liquid by reciprocating movement of a diaphragm;
• a suction unit including a suction check valve configured to allow the liquid to flow only in a suction direction with respect to the diaphragm, and an inflow chamber into which the liquid flows through the suction check valve;
• a discharge unit including a discharge check valve configured to allow the liquid to flow only in a discharge direction with respect to the diaphragm, and an outflow chamber from which the liquid entering from the inflow chamber flows out toward the discharge check valve, and
• an optional unit disposed between the suction unit and the discharge unit, wherein
• the suction unit and the discharge unit are arranged in a stacking manner so that at least one of the optional unit is sandwiched between them, and that the inflow chamber and the outflow chamber sequentially face the diaphragm on one side in a reciprocating direction of the diaphragm, and
• the suction unit, the discharge unit, and the optional unit are attachable and detachable from each other.