F - Mech Eng,Light,Heat,Weapons – 26 – B
Patent
F - Mech Eng,Light,Heat,Weapons
26
B
126/13, 309/34,
F26B 21/02 (2006.01) B23K 1/015 (2006.01)
Patent
CA 1132021
ABSTRACT A method and apparatus for heating are provided wherein articles to be heated are carried through a multi-stage device on a conveyor. In a first stage is a pre-heating chamber wherein directed streams of warm air are passed over the conveyor path and the articles. The air preheats the articles to prepare them for rapid condensation heating. In a second stage is a heating chamber in which a vapor generator sends hot vapor over the path, heating the articles to the desired temperature. In the third stage is a drying and cool- ing chamber wherein streams of warm air are again passed over the articles, removing any fluid vapors condensed thereon. The air flows in the first and third stages are directed to reduce the loss of fluid vapors from the reflow chamber and to catch the escaping vapors and direct them past condensing coils for collection and reuse. The falling vapors in the reflow chamber are likewise condensed by coils below the conveyor path and returned to the vapor generator. In an alternate embodiment an air/vapor separation device is used to remove the remaining vapors from the air leaving the first and third stages after passage over the condensing coils.
355736
Electrovert Ltd.
Smart & Biggar
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