Water Supply Module and Electric Device Cooling System Comprising Same

An embodiment water supply module includes a reservoir tank partitioned to accommodate a first coolant and a second coolant having different temperatures. A heat exchanger is coupled to the reservoir tank and includes a first coolant passage and a second coolant passage through which the first coolant and the second coolant flow and a refrigerant passage capable of exchanging heat with the first coolant passage and the second coolant passage. A controller is coupled to the reservoir tank and includes a directional control valve configured to control a flow of the first coolant and the second coolant in a plurality of directions.