HEAT EXCHANGE DEVICES
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Accused Products
Abstract
A heat exchanger device (1) such as for use in recovering heat from shower waste water includes a casing base (2) and lid (3) forming an enclosure containing a first fluid conduit and a second fluid conduit (5), the second conduit being for fresh water supply and located in the first conduit, the second conduit having conduit sections in a serpentine path through the first conduit, the first and second conduits being arranged generally for counter-flow heat exchange with the second conduit having elongate sections configured generally transverse to a flow direction through the first conduit, the first conduit having baffles at an inlet and an outlet thereof for keeping the second conduit submerged in the first conduit, the device being provided with a foot or bodyweight operated actuation valve for actuating fresh water supply through the first conduit.
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Citations
80 Claims
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1-60. -60. (canceled)
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61. A heat exchanger device comprising:
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a first flow conduit arranged for flow of a first fluid from an inlet to an outlet thereof; and a second flow conduit arranged for flow of a second fluid flow from an inlet to an outlet thereof; the second flow conduit includes a sequential series of generally parallel or similarly oriented or shaped sections providing a serpentine or convoluted second flow path therethrough; the second flow conduit is thermally conductive for heat transfer between fluids in the first and second flow conduits; a flow path for flow through the first flow conduit being substantially transverse to a direction of alignment of at least a predominant proportion of the second flow conduit; the first and second conduits being arranged overall for counterflow heat exchange; the first conduit comprising a passageway having at least one interior wall extending therealong and located between the inlet and outlet thereof, the passageway being configured for flow of fluid in a layer formation therethrough with the layers being of generally uniform thickness laterally across a flow front of fluid flowing through the first flow conduit; surfaces of the first and second conduits are arranged to be in contact with fluid in the first conduit; surfaces of the first and second conduits are configured and shaped such that, in moving along a flow path through the first flow conduit, a portion of height of total available open area for flow of the layer through the first flow conduit is inversely proportional to a width of the total available open area of flow so as to mitigate against substantial changes in a cross-sectional area of the available open area of flow, and the cross sectional area is proportional to a total perimeter of the available open area for mitigating against substantial changes in the total perimeter. - View Dependent Claims (62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80)
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Specification