초록 ▼

A flux vapor management system for a reflow oven includes temperature control units disposed in heating and cooling regions of the oven. A fan within each of the temperature control units provides suction to an intake port. Intake ports of selected temperature control units in the heating region of

A flux vapor management system for a reflow oven includes temperature control units disposed in heating and cooling regions of the oven. A fan within each of the temperature control units provides suction to an intake port. Intake ports of selected temperature control units in the heating region of the oven are connected with a barrier vent disposed between the heating and cooling regions of the oven. Gas drawn into the barrier vent by the suction from the intake ports prevents flux laden gas from migrating into the cooling region. The flux vapor management system also includes a filter for removing flux vapors from a reflow oven. The filter condenses flux vapors by converging a jet of hot gas from the oven with a cooled gas jet causing the flux vapors to condense while suspended in the gas stream. The flux laden gas does not contact any solid surface below the flux condensation temperature so there is no build-up of flux within the apparatus. The condensed flux forms particles or droplets that are trapped by a filter. A portion of the filtered gas is directed through a heat exchanger to create the cooled gas stream.

대표청구항 ▼

[ What is claimed is:] [1.] A filtering apparatus for a reflow oven, the apparatus comprising:a jet mixer connected to a high temperature region of the oven, wherein the jet mixer mixes a cooled gas stream with a hot gas stream from the oven to form a mixed gas stream;a filter connected with the jet

[ What is claimed is:] [1.] A filtering apparatus for a reflow oven, the apparatus comprising:a jet mixer connected to a high temperature region of the oven, wherein the jet mixer mixes a cooled gas stream with a hot gas stream from the oven to form a mixed gas stream;a filter connected with the jet mixer to filter the mixed gas stream to form a filtered gas stream; anda heat exchanger connected to the filter and to the jet mixer, wherein the heat exchanger cools a first portion of the filtered gas stream and forms the cooled gas stream. [29.] A method for filtering a flux vapor from a gas in a reflow oven, comprising:heating the gas to a temperature above a condensation temperature of the flux vapor to form a hot gas;mixing the hot gas with a cooled gas, wherein the mixed gases are below the condensation temperature of the flux vapor;filtering the mixed gases; andcooling a first portion of the filtered gases to form the cooled gas.