Patent ID: 7640972

Claim:
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 ).