Round plate heat exchanger

A round plate heat exchanger comprising:

• a heat exchange part (100) having a plurality of heat medium flow paths (P1) extending in a flow direction of a heat medium and aligned parallel to each other in a height direction, a plurality of combustion gas flow paths (P2), a plurality of heat medium connection flow paths (P1′), and a plurality of unit plates stacked parallel to each other in a stack direction,
• wherein,
• the flow direction of the heat medium, the height direction, and the stack direction are perpendicular to one another,
• each of the plurality of unit plates comprises a first plate and a second plate, wherein the first plate and the second plate are stacked,
• each of the plurality of heat medium flow paths (P1) is formed to be spaced apart between the first plate and the second plate of each of the plurality of unit plates, and comprises an upper side heat medium flow path (P1-1) and a lower side heat medium flow path (P1-2), wherein the upper side heat medium flow path (P1-1) and the lower side heat medium flow path (P1-2) are configured such that the heat medium flows in the flow direction of a heat medium separately,
• each of the plurality of combustion gas flow paths (P2) is formed between the second plate of one unit plate of adjacently stacked unit plates and the first plate of the other unit plate of adjacently stacked unit plates such that each of the plurality of heat medium flow paths (P1) and each of the plurality of combustion gas flow paths (P2) are alternately formed to be adjacent to each other,
• each of the plurality of heat medium connection flow paths (P1′) is connected to the upper side heat medium flow path (P1-1) and the lower side heat medium flow path (P1-2) such that the heat medium flows between the upper side heat medium flow path (P1-1) and the lower side heat medium flow path (P1-2) and the heat medium is mixed, wherein the upper side heat medium flow path (P1-1) and the lower side heat medium flow path (P1-2) are on the same heat medium flow path or on different heat medium flow paths of adjacently stacked heat medium flow paths, and
• the plurality of unit plates are aligned in an alternating manner along the height direction with a relative displacement (Δh) along the height direction between the adjacently stacked unit plates.