PURPOSE: To obviate the need for a connection pipe, reduce the number of soldering spots, reduce the cost and improve the workability by a method wherein a single pipe is continuously bent into a U-shape, and bent into a L-shape in required spots, and extended along the back and one side or both side of a refrigerator.

CONSTITUTION: A radiation pipe 10 is continuously bent into U-shapes on the back 4 of a refrigerator. A leftwardmost straight pipe part 12a on the back 4 is bent in the same plane and transferred to a horizontal part 14. The horizontal part 14 is bent at an intermediate part 16 into an L-shape in a direction upward from the paper of the diagram, i.e., at right angles. The horizontal part 14 is further bent upward and forms a leftwardmost straight part 12b of a right side 6 of the refrigerator. In following, the pipe is continuously bent into U-shapes in a similar manner described at the back. Both sides 20 and 22 of the radiation pipe 10 are connected to a refrigerant piping running around a compressor and a vaporizer.