Spiral heat exchanger

A spiral heat exchanger comprising a central cylinder (5) and at least two spiral sheets (6, 7) extending from the cylinder along a respective spiral-shaped path around a common center axis (x) and forming at least a first spiral-shaped flow channel (8) for a first medium and a second spiral-shaped flow channel (9) for a second medium,

• wherein the cylinder (5) extends around the center axis (x) and forms an inner space (4) within the cylinder,
• wherein the cylinder includes a front end (5′), a rear end (5″), at least a first lateral opening (11) communicating with the first flow channel (8) and at least a second lateral opening (12) communicating with the second flow channel (9),
• wherein the heat exchanger includes a first pipe (14), which is arranged to extend through the rear end (5″) into the inner space of the cylinder (5), wherein a first connection channel, communicating with the first flow channel (8) via the first lateral opening (11), is formed within the first pipe (14) and a second connection channel, communicating with the second flow channel (9) via the second lateral opening (12), is formed in the inner space outside the first pipe (14), and
• wherein the first lateral opening (11) is axially displaced from the second lateral opening (12).