| 主权项 |
1. A heat exchange unit for hot gas recovery comprising, an inlet duct to which a heat exchange duct and a bypass duct are connected, one being surrounded by the other, a heat exchange array situated within the heat exchange duct, a central core around which the inner of the bypass and heat exchange ducts is provided, and a damper arranged to direct the flow of gas through the unit, wherein the damper comprises a plurality of sheet members, with a first subset of sheet members extending across at least one of the bypass duct and the heat exchange duct and a second subset of sheet members extending across the other of the bypass duct and the heat exchange duct, such that the damper is situated within the inlet duct and can be rotated, such that in a first position the first subset of sheet members of the damper provides a first continuous surface and substantially seals one of the heat exchange and bypass ducts from the inlet duct and in a second position the second subset of sheet members of the damper provides a second continuous surface and substantially seals the other of the ducts from the inlet duct, wherein the damper comprises a plurality of shafts, each shaft supporting at least one sheet member, wherein each shaft supports at least one sheet member in the heat exchanger duct and at least one sheet member in the bypass duct. |
