Spiral exchanger and method for manufacturing such an exchanger

摘要

A spiral exchanger has a winding axis and includes an outer sheet and an inner sheet secured to one another in a fastening plane before winding, and delimiting a space for a fluid between them. The outer sheet and the inner sheet are wound on themselves and each sheet includes a plurality of flexible areas and a plurality of rigid areas. The flexible areas are more flexible than the rigid areas during folding. The flexible areas and the rigid areas are extended along the winding axis, and at least one flexible area of the outer sheet and at least one flexible area of the inner sheet that delimit the space between them form a pair of flexible areas that are aligned in the same radial direction.

主权项

1. A spiral exchanger having a winding axis comprising:
an outer sheet and an inner sheet secured to one another in a fastening plane before winding and delimiting a space for a fluid between them, the outer sheet and the inner sheet being wound on themselves and each outer and inner sheet including a plurality of flexible areas and a plurality of rigid areas, the flexible areas being more flexible than the rigid areas during folding; the flexible areas and the rigid areas are extended along the winding axis, and at least one flexible area of the outer sheet and at least one flexible area of the inner sheet that delimit the space between them form a pair of flexible areas that are aligned in a same radial direction, wherein when considered in cross-section in a direction of winding, the rigid areas are formed by flats and the flexible areas are formed by hollow profiles and edges are arranged between the hollow profiles and the flats, and wherein the hollow profiles of the outer sheet are, in a winding direction, defined by a first dimension, and wherein the hollow profiles of the inner sheet are, in the winding direction, defined by a second dimension that is greater than the first dimension, and wherein the hollow profiles are formed toward the winding axis; and wherein flats on the outer sheet have a first flat dimension in the winding direction that is greater than a second flat dimension of flats on the inner sheet, the flats of the inner and outer sheets being aligned with each other such that a minimum fluid passage section is defined by a space between the hollow profiles of the outer sheet and edges of the inner sheet.