3-WAY VALVE AND HEAT PUMP SYSTEM USING SAME

Embodiments provide a 3-way valve and a heat pump system using same, the 3-way valve comprising: a housing in which an inlet, a first outlet, and a second outlet are disposed; and a ball valve which is disposed inside the housing, wherein the ball valve comprises: an inlet hole which is connected to the inlet and into which a refrigerant flows; a first outlet hole and a second outlet hole, through which the refrigerant flowing into the inlet hole flows out, and when the ball valve rotates, the refrigerant flowing out through the first outlet hole passes through the first outlet, and the flow rate of the refrigerant flowing out through the second outlet hole is controlled through the second outlet.