A heat exchange system, comprising: a first heat exchanger comprising a first refrigerant tube and a first head including a lower first head and a upper first head provided at corresponding ends of the first refrigerant tube; a second heat exchanger spaced apart from the first heat exchanger, the second heat exchanger comprising a second refrigerant tube and a second head including a lower second head and an upper second head provided at corresponding ends of the second refrigerant tube; a connection device that connects the first heat exchanger and the second heat exchanger, wherein the connection device is configured to guide refrigerant into the first heat exchanger and the second heat exchanger; and a plurality of connection pipes configured to couple the connection device to the first and second heat exchangers (100, 200), the plurality of connection pipes comprising at least one bent portion, wherein the plurality of connection pipes comprise: a plurality of first connection pipes that couple a lower portion of the connection device to the lower first head and the lower second head (131, 231), and a plurality of second connection pipes that couple a upper portion of the connection device to the upper first head and the upper second head (132, 232), wherein the connection device comprises: a body (301, 501) that defines an interior space; an inlet (310, 510) formed at a first end of the body (301, 501); an outlet (370, 570) formed at a second end of the body (301, 501); a plurality of second insertion holes formed in the connection device to respectively receive corresponding ends of each of the first and second connection pipes (351, 355); and a distribution guide having an inclined or rounded surface with respect to the inlet (310, 510), wherein the distribution guide partitions a distribution space in the interior space to guide refrigerant from the inlet (310, 510) into the first or the second connection pipes. a first heat exchanger comprising a first refrigerant tube and a first head including a lower first head and a upper first head provided at corresponding ends of the first refrigerant tube; a second heat exchanger spaced apart from the first heat exchanger, the second heat exchanger comprising a second refrigerant tube and a second head including a lower second head and an upper second head provided at corresponding ends of the second refrigerant tube; a connection device that connects the first heat exchanger and the second heat exchanger, wherein the connection device is configured to guide refrigerant into the first heat exchanger and the second heat exchanger; and a plurality of connection pipes configured to couple the connection device to the first and second heat exchangers (100, 200), the plurality of connection pipes comprising at least one bent portion, wherein the plurality of connection pipes comprise: a plurality of first connection pipes that couple a lower portion of the connection device to the lower first head and the lower second head (131, 231), and a plurality of second connection pipes that couple a upper portion of the connection device to the upper first head and the upper second head (132, 232), a plurality of first connection pipes that couple a lower portion of the connection device to the lower first head and the lower second head (131, 231), and a plurality of second connection pipes that couple a upper portion of the connection device to the upper first head and the upper second head (132, 232), wherein the connection device comprises: a body (301, 501) that defines an interior space; an inlet (310, 510) formed at a first end of the body (301, 501); an outlet (370, 570) formed at a second end of the body (301, 501); a plurality of second insertion holes formed in the connection device to respectively receive corresponding ends of each of the first and second connection pipes (351, 355); and a distribution guide having an inclined or rounded surface with respect to the inlet (310, 510), wherein the distribution guide partitions a distribution space in the interior space to guide refrigerant from the inlet (310, 510) into the first or the second connection pipes. a body (301, 501) that defines an interior space; an inlet (310, 510) formed at a first end of the body (301, 501); an outlet (370, 570) formed at a second end of the body (301, 501); a plurality of second insertion holes formed in the connection device to respectively receive corresponding ends of each of the first and second connection pipes (351, 355); and a distribution guide having an inclined or rounded surface with respect to the inlet (310, 510),