METHOD AND MEANS OF REDUCING LOSS OF HEAT OF EVAPORATION

摘要

A hot water shrink tunnel (10) includes a housing (11) in which there is a heat chamber. The heat chamber housing (11) has an inlet opening (12) and spaced therefrom an outlet opening (13). Each opening (12/13) is closed by an end closing device (21) in the form of a curtain and through which product can pass. A conveyor (14) enables product to be conveyed through the heat chamber from inlet opening (12) to outlet opening (13). An external duct (17) is mounted adjacent end opening (12) and similarly a duct 19 adjacent end opening (13). Each duct includes a shroud (19) of a size and design to capture hot water vapour which, in use of the shrink tunnel, issues through the end opening (12/13) when product passes through the curtain. The heat chamber does not require a flue or venting to atmosphere.