Abstract: The invention relates to a method and a device for manufacturing a heat exchanger assembled from substantially flat elements provided with spacing profiles, wherein adjacent elements are provided on at least a part of their edges with spacing profiles, and wherein the method comprises of stacking the substantially flat elements onto each other until the required height is obtained, and mutually connecting the substantially flat elements at the edges of the elements, wherein the elements are connected by bringing only the side surfaces of the stack of elements into contact with a liquid forming a connection between the elements. This measure makes automated processing possible. The stack of elements is preferably immersed to a limited depth in a bath of the liquid forming a connection between the elements. The method is hereby easy to control, while the means necessary for performing thereof are relatively simple.

Abstract: The invention relates to a thermal insulation panel, comprising: a housing with: a first main wall and a second main wall which each extend perpendicularly of a temperature gradient, and auxiliary walls connecting both main walls and extending parallel to the temperature gradient, wherein the auxiliary walls connect with ribs to the main walls, and a filling placed in the housing and able to withstand pressure forces, wherein the pressure within the housing is reduced to a value at which no heat transfer of any significance takes place, and wherein the housing is manufactured from metal, wherein a strip of the auxiliary wall contacting a rib is welded to the main wall, and that a welding strip is welded onto the weld. With mere welding of a sufficiently thin metal foil it is practically impossible to obtain a weld of sufficient quality. With a sandwich weld it is possible to obtain a sufficiently strong and reliable welded connection, even when a very tin metal foil is used as auxiliary wall.