Portable equipment for monitoring and controlling the level of oxygen in reflow oven atmosphere

摘要

The present invention describes a portable device for monitoring and controlling the level of residual oxygen in reflow oven atmosphere (1). This referred equipment is able to determine the quality of the atmosphere of a reflow oven, using parameters predetermined by the user. Therefore, the equipment performs the monitoring of the reflow oven atmosphere (1) controlling the level of residual oxygen of the reflow oven (1) by increasing or decreasing of the feed flow rate of nitrogen by the control that the microcontroller exerts over the proportional valve of nitrogen flow control (9), by opening or closing the valves to kept such predetermined values.

主权项

1. Portable equipment for monitoring and controlling the atmosphere of reflow ovens, comprising:
a nitrogen injection flow control box comprising at least one ball-type manual valve, at least one nitrogen pressure regulator with pressure gauge, a proportional valve of nitrogen flow control; and a cleaning line comprising a ball-type manual valve of the cleaning line and nitrogen pressure regulator of the cleaning line with a manometer; a collecting and analysis box comprising a line filter, at least one solenoid valve, a lambda sensor coupled with an analysis chamber, a signal converter, a flow meter with needle valve, and a diaphragm-type vacuum pump; and a box with a programmable controller, and a display with communicative interface comprising of a microcontroller, and a signal converter the lambda sensor coupled with an analysis chamber connected with one to another by electrical cables.