Furnace having regulated flow rate of inerting gas

Details Furnace having regulated flow rate of inerting gas Furnace having regulated flow rate of inerting gas

1996-06-11

1998-08-18

Bennett, Henry A.

Heating

Work chamber having heating means

Work chamber having gaseous material supply or removal...

432 47, F27B 504

Patent

active

057951470

ABSTRACT:
A furnace, for instance a reflow soldering oven, in which oxygen concentration is either directly or inferentially sensed within central processing and either one or both of the inlet and outlet sections of the furnace. Signals generated by these sensors are processed in a PID controller to generate a control signal to control the flow rate of inerting gas into the central processing section, thereby to at least inhibit ingress of air into the central processing section. The PID controller is programmed such that its integral error term is set equal to a time average of the oxygen concentrations of the central processing section less an oxygen concentration set point desired for the central processing section. The proportional and differential error terms are set equal to a time average of the concentrations of the central processing section and one or both of the inlet and outlet sections of the furnace less the oxygen concentration set point.

REFERENCES:
patent: 4551091 (1985-11-01), Paterson
patent: 4920998 (1990-05-01), Deitrick et al.
patent: 5252860 (1993-10-01), McCarty et al.

Affiliated with

Also associated with

Rating

Furnace having regulated flow rate of inerting gas does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Furnace having regulated flow rate of inerting gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Furnace having regulated flow rate of inerting gas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1109675