Abstract: A recuperator including neighbouring sheets between which flow passages for air are formed. The sheets are provided with a corrugated profile including peaks, troughs and straight flanks. The peaks and troughs of a sheet are situated at an equal distance from a central plane of the sheet. Neighbouring flanks are directly connected to each other via a peak or trough. Between neighbouring flanks, first and second passage duct parts are formed which are each delimited at one end by a peak or trough and which are open at the end situated opposite the peak. In a direction at right angles to the central plane, the peaks and troughs associated with neighbouring sheets are aligned with respect to each other in such a way that first passage duct parts of a sheet and second passage duct parts associated with a neighbouring sheet are in communication with each other via connecting passage parts which extend between the troughs associated with the one sheet and peaks associated with the other sheet.

Abstract: A heat exchanger including a plurality of flat sheets arranged in parallel and a plurality of profiled sheets, each of which including a number of straight segments and being arranged between two subsequent flat sheets and having a repeating profile. The profiled sheets and the flat sheets together create a plurality of parallel ducts arranged in layers. The parallel ducts are divided by the profiled sheets into ducts of a first type and ducts of a second type, the ducts of the second type neighboring the ducts of the first type. Each duct of the first and second type has a width w(d) which is a function of a distance d with d the distance from a first flat sheet.

Abstract: A recuperator including a number of neighbouring hexagonal sheets which are connected to each other. Flow passages are formed between neighbouring sheets. Each of the sheets, at its periphery, is at least partially surrounded by and connected to an associated connecting body. Neighbouring connecting bodies are connected to each other at at least a part of the periphery of the associated sheets and together form the wall of a housing. Passage openings are provided in the wall which are connected to the flow passages for allowing air into the flow passages via the passage openings. Neighbouring connecting bodies are provided with protruding parts and with recesses respectively on sides facing each other, wherein the forms of the protruding parts and of the recesses adjoin each other in order to connect the connecting bodies to each other by a press fit. Methods for producing a connecting body and for producing a recuperator.

Abstract: A recuperator including neighbouring sheets between which flow passages for air are formed. The sheets are provided with a corrugated profile including peaks, troughs and straight flanks. The peaks and troughs of a sheet are situated at an equal distance from a central plane of the sheet. Neighbouring flanks are directly connected to each other via a peak or trough. Between neighbouring flanks, first and second passage duct parts are formed which are each delimited at one end by a peak or trough and which are open at the end situated opposite the peak. In a direction at right angles to the central plane, the peaks and troughs associated with neighbouring sheets are aligned with respect to each other in such a way that first passage duct parts of a sheet and second passage duct parts associated with a neighbouring sheet are in communication with each other via connecting passage parts which extend between the troughs associated with the one sheet and peaks associated with the other sheet.

Abstract: The invention provides a recuperator for exchanging energy between air flows, comprising stacked plates with flow channels for air flows being provided between neighbouring plates. Plates of a first type and plates of a second type are provided in the stack. The plates of the first type and the plates of the second type differ from one another as to their weight and/or the material from which they are manufactured. The invention further relates to a ventilation device provided with such a recuperator, to a window frame provided with such a ventilation device, and to a building provided with such a ventilation device or such a window frame.

Abstract: A heat exchanger including a plurality of flat sheets arranged in parallel and a plurality of profiled sheets, each of which including a number of straight segments and being arranged between two subsequent flat sheets and having a repeating profile. The profiled sheets and the flat sheets together create a plurality of parallel ducts arranged in layers. The parallel ducts are divided by the profiled sheets into ducts of a first type and ducts of a second type, the ducts of the second type neighboring the ducts of the first type. Each duct of the first and second type has a width w(d) which is a function of a distance d with d the distance from a first flat sheet.