Multi-fluid heat transfer device having a plate stack construction

Heat transfer device having a construction consisting of several plates which are stacked above one another and have openings, comprising:

• at least one first and at least one second flow duct plate unit, of which the first flow duct plate unit is provided with a group of side-by-side flow duct openings which extend between two plate side areas, and the second flow duct plate unit is provided with two separate groups of side-by-side flow duct openings which extend between two plate side areas, the first and the second flow duct plate units being arranged in an alternating manner in a plate stack and having connection duct openings which are separate from the flow duct openings, and
• at least one connection cover plate unit arranged between respective first and second flow duct plate units while covering flow duct openings of the respective first and second flow duct plate units with respect to one another and having connection plate unit flow duct openings,
• wherein the connection duct openings in the flow duct plate units and in the at least one connection cover plate unit form one distributor and collector duct pair respectively for each of three groups of side-by-side flow duct openings and are arranged such that
• a first pair of connection duct openings of a respective connection cover plate unit overlaps, on the one hand, with a first pair of corresponding connection duct openings of an adjoining first flow duct plate unit and, on the other hand, with respective ends of a corresponding group of flow duct openings of an adjoining second flow duct plate unit,
• a second pair of connection duct openings of the connection cover plate unit overlaps, on the one hand, with a second pair of corresponding connection duct openings of the first flow duct plate unit and, on the other hand, with respective ends of a corresponding other group of flow duct openings of the second flow duct plate unit, and
• a third pair of connection duct openings of the connection cover plate unit overlaps, on the one hand, with a pair of corresponding connection duct openings of the second flow duct plate unit and, on the other hand, with respective ends of the group of flow duct openings of the first flow duct plate unit,
• and further comprising insulating slot openings which are placed at least along a portion of plate edge areas for the formation of thermally insulating slots, which extend in the plate stacking direction, in an aligned corresponding relationship in the flow duct plate units as well as in the at least one connection cover plate unit.

Heat transfer device having a construction consisting of several plates which are stacked above one another and have openings, comprising:

• at least one first and at least one second flow duct plate unit, of which the first flow duct plate unit is provided with a group of side-by-side flow duct openings which extend between two plate side areas, and the second flow duct plate unit is provided with two separate groups of side-by-side flow duct openings which extend between two plate side areas, the first and the second flow duct plate units being arranged in an alternating manner in a plate stack and having connection duct openings which are separate from the flow duct openings, and
• at least one connection cover plate unit arranged between respective first and second flow duct plate units while covering flow duct openings of the respective first and second flow duct plate units with respect to one another and having connection plate unit flow duct openings,
• wherein the connection duct openings in the flow duct plate units and in the at least one connection cover plate unit form one distributor and collector duct pair respectively for each of three groups of side-by-side flow duct openings and are arranged such that
• a first pair of connection duct openings of a respective connection cover plate unit overlaps, on the one hand, with a first pair of corresponding connection duct openings of an adjoining first flow duct plate unit and, on the other hand, with respective ends of a corresponding group of flow duct openings of an adjoining second flow duct plate unit,
• a second pair of connection duct openings of the connection cover plate unit overlaps, on the one hand, with a second pair of corresponding connection duct openings of the first flow duct plate unit and, on the other hand, with respective ends of a corresponding other group of flow duct openings of the second flow duct plate unit, and
• a third pair of connection duct openings of the connection cover plate unit overlaps, on the one hand, with a pair of corresponding connection duct openings of the second flow duct plate unit and, on the other hand, with respective ends of the group of flow duct openings of the first flow duct plate unit,
• wherein the flow duct openings in the at least one first flow duct plate unit extend essentially transversely to the two groups of flow duct openings of the at least one second flow duct plate unit, the two groups of flow duct openings of the second flow duct plate unit being arranged in a longitudinal direction of the flow duct openings of the at least one first flow duct plate unit behind one another,
• and further comprising insulating slot openings which are placed at least along a portion of plate edge areas for the formation of thermally insulating slots, which extend in the plate stacking direction, in an aligned corresponding relationship in the flow duct plate units as well as in the at least one connection cover plate unit.