초록 ▼

A heat absorbing element formed from a single metal strip of substantially uniform thickness, comprising a tube having a wall comprising at least a double thickness of strip seamed along a line extending longitudinally of the tube to seal the tube for flow therethrough of a heat transfer fluid, and

A heat absorbing element formed from a single metal strip of substantially uniform thickness, comprising a tube having a wall comprising at least a double thickness of strip seamed along a line extending longitudinally of the tube to seal the tube for flow therethrough of a heat transfer fluid, and a fin along the tube stretching out from the seam line, the fin comprising at least one less thickness of strip than the tube wall. A method of manufacturing such an element is also disclosed.

대표청구항 ▼

A heat absorbing element formed from a single metal strip of substantially uniform thickness, said strip having longitudinal edge margins at opposite sides of the strip, said element comprising a tube having a wall comprising at least a double thickness of said strip seamed along a line extending lo

A heat absorbing element formed from a single metal strip of substantially uniform thickness, said strip having longitudinal edge margins at opposite sides of the strip, said element comprising a tube having a wall comprising at least a double thickness of said strip seamed along a line extending longitudinally of the tube to seal the tube for flow therethrough of heat transfer fluid, and a pair of fins formed by said longitudinal edge margins extending generally axially with respect to the tube stretching out from said line of seam for collecting heat and transferring it to the tube, each axial fin comprising at least one less thickness of said strip than the tube wall.