| 摘要 |
A solder-desolder system includes a hand held tool having an electrically heated soldering tip which is a hollow tube through which molten solder may be removed from the workpiece by a steady inward flow of air or by a strong impulse, vacuum stroke. Also supplied to the workpiece is a flow of solder melting hot gas which may be inert for improved soldering performance. The hot gas is directed over the heated soldering tube and may independently melt the solder or it may be utilized to preheat the work. In any event, the system provides in a compact hand held soldering tool a jet of hot air within which is a hot soldering tube tip within which a vacuum flow removes molten solder from the workpiece. A further aspect of the solder-desolder system is a trigger in the handle of the tool which selectively connects the hollow tube to an ambient air driven venturi to provide the vacuum stroke. A base unit houses the venturi, a control circuit to remotely energize and temperature control the soldering tip heater, a gas control solenoid value, and a solenoid value to control the operation of the gas driven venturi. A rest switch in a cradle, for the hand held tool, deactivates these gas and/or air flow functions when the tool is at idle and is placed by the operator onto the cradle portion of the base unit.
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