Heat exchanger having a swirling component

A heat exchanger formed by stacking a plurality of plates with each other, the heat exchanger comprising:

• a refrigerant receiving tank configured to receive a refrigerant;
• a refrigerant discharging tank configured to discharge the refrigerant that has heat-exchanged;
• and
• a plurality of refrigerant passages in which heat exchange between the refrigerant and another fluid is performed, the plurality of refrigerant passages fluidly connecting between the refrigerant receiving tank and the refrigerant discharging tank, wherein
• the refrigerant receiving tank includes a swirl structure configured to generate a swirling component in a flow of the refrigerant in the refrigerant receiving tank,
• the swirl structure includes a vane,
• D is defined as a distance between adjacent ones of the plurality of refrigerant passages,
• d is defined as a width of an inlet of each of the plurality of refrigerant passages,
• θ is defined as an angle of the vane of the swirl structure,
• x is defined as a ratio of an area of the vane to a cross-sectional area of the refrigerant receiving tank, wherein the area of the vane comprises a sum of projected areas of vane shafts and vanes, and the cross-sectional area of the refrigerant receiving tank is determined on a projected horizontal plane which is perpendicular to a stacking direction of the plurality of plates, and
• 0<d·x·cos θ/D<0.6.