Whats in a furnace Element.
- Thread starter SilverFox
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A
Anonymous
Guest
At the cost of conventional heaters,I would say no.
eeTHr
Well-known member
SilverFox---
Is that a part which glows red hot, or is it a fusable link to prevent over heating?
Is that a part which glows red hot, or is it a fusable link to prevent over heating?
A
Anonymous
Guest
BWAAAAHAHAHAHAHAHAHAHAHAHASilverFox said:
Now thats got Gold Refining Forum written all over it!
I think 50 members(myself included) knew EXACLTY what you meant when you said that! Deep down inside I will always be backwoods country.
It's pretty much the same element found in Gas clothes dryers, gas ranges (in the oven), & many other gas appliances. I don't know what they are made of, probably something very valuable since I have disposed of many of them.... :|
A
Anonymous
Guest
It is a heating element,or "Glow Bar" that is used to ignite the fuel.I have only seen them made out of ceramic,and I have not found any information to suggest otherwise.They open the fuel valve when the resistance reaches a certain ohm,at that point the ignitor is glowing hot enough to create ignition when the fuel is introduced.
I had a problem with an oven we had some time ago.It seemed the ignitor was not reaching the appropriate resistance,therefore it wasn't opening the fuel valve.I compared the resistance,at full draw,to a new one that I had purchased,and sure enough they were very different.
Any cracks or imperfections in the element,changes the resistance in the ignitor,therefore won't allow the fuel to flow.
I had a problem with an oven we had some time ago.It seemed the ignitor was not reaching the appropriate resistance,therefore it wasn't opening the fuel valve.I compared the resistance,at full draw,to a new one that I had purchased,and sure enough they were very different.
Any cracks or imperfections in the element,changes the resistance in the ignitor,therefore won't allow the fuel to flow.
cheese
Member
From Patents-Online:
It has been discovered that a ceramic ignitor having the requisite strength, temperature, service life, resistance, and voltage characteristics in combination with greatly improved response time, can be constructed from pure lanthanum chromite or from lanthanum chromite which has been doped with specific percentages of magnesium, niobium, or strontium ions alone or in combination.
Particularly, it has been found that an ignitor formed from these materials is capable of efficient operation at line voltage with significantly lower power demand than ignitors of the prior art.
Lanthanum chromite has been used in the prior art in combination with other materials for the manufacture of electrodes and semiconductors as disclosed, for example, in Aubin et al, U.S. Pat. No. 3,730,911. However, lanthanum chromite has not been previously suggested or used for ceramic ignitor construction.
It is also known in the art to modify the electronic properties of lanthanum chromite by doping it with certain metallic ions which substitute for the lanthanum or chromium ions at the A- or B- sites of the Perovskite lattice. Staut et al, U.S. Pat. No. 3,974,108 discloses a method for such doping using strontium, calcium or magnesium ions.
As with pure lanthanum chromite, doped lanthanum chromite has not been suggested or used previously for ceramic ignitor construction.
Accordingly, it is a primary object of the invention to provide improved materials for the formation of ceramic ignitors.
It has been discovered that a ceramic ignitor having the requisite strength, temperature, service life, resistance, and voltage characteristics in combination with greatly improved response time, can be constructed from pure lanthanum chromite or from lanthanum chromite which has been doped with specific percentages of magnesium, niobium, or strontium ions alone or in combination.
Particularly, it has been found that an ignitor formed from these materials is capable of efficient operation at line voltage with significantly lower power demand than ignitors of the prior art.
Lanthanum chromite has been used in the prior art in combination with other materials for the manufacture of electrodes and semiconductors as disclosed, for example, in Aubin et al, U.S. Pat. No. 3,730,911. However, lanthanum chromite has not been previously suggested or used for ceramic ignitor construction.
It is also known in the art to modify the electronic properties of lanthanum chromite by doping it with certain metallic ions which substitute for the lanthanum or chromium ions at the A- or B- sites of the Perovskite lattice. Staut et al, U.S. Pat. No. 3,974,108 discloses a method for such doping using strontium, calcium or magnesium ions.
As with pure lanthanum chromite, doped lanthanum chromite has not been suggested or used previously for ceramic ignitor construction.
Accordingly, it is a primary object of the invention to provide improved materials for the formation of ceramic ignitors.
