Abstract: A heat and humidity exchange plate for an air-to-air heat exchanger is made by continuously forming an expanded metal structure from a strip of metal foil by slitting the metal foil in a transverse direction, stretching the metal foil in a longitudinal direction, and then rolling over an entire width of the strip of metal foil. The expanded metal structure is subjected to an annealing heat treatment. A vapour-permeable polymeric membrane is provided on the annealed expanded metal structure. Corrugated and embossed-shaped elements are formed on the annealed expanded metal structure with the vapour-permeable polymeric membrane by means of omnidirectional deformation. A circumferential shape of the exchange plate is formed by removing excess edges from the annealed expanded metal structure with the vapour-permeable polymeric membrane.

Abstract: The invention relates to a method of manufacturing a heat and humidity exchange plate of an air-to-air counterflow enthalpy heat exchanger, which comprises a supporting member (101) and at least one polymeric vapour-permeable membrane (102), characterized in that it comprises the following successive steps: a - continuous formation of a semi-finished product for the supporting member (101) in the form of an expanded metal structure (1010) from a strip of thin metal foil (1011), whereby the operations of slitting in the transverse direction, stretching in the longitudinal direction and rolling over the entire width of the strip are successively performed; b - providing the expanded metal structure (1010) according to the preceding step with a thin vapour-permeable polymeric membrane (102); c - on the expanded metal structure (1010) provided with the vapour-permeable polymeric membrane (102), formation of corrugated and embossed shape elements of the future heat and humidity exchange plate (10) of the counterf

Abstract: The invention relates to a counter flow enthalpy exchanger (1) having a parallelogram-shaped central part (11), whose ends in the flow direction through the exchanger it is joined by end parts (12, 13), which become narrower in the direction from the central part (11), whereby in order to separate the flow of the heat-transfer medium in the direction from the inner space to the outer space are arranged contour identical and with respect to the flowing medium sealed vapour-permeable lamellae (10) with shaping means for generating turbulent flow, whereby every two adjacent lamellae (10) form one interplate flow channel in the central part (11) one interplate flow channel. The lamella (10) is made as a one-piece self-supporting moulding common to the central part (11) and the end parts (12, 13), whereby it does not have a reinforcing support grid.