We bought a self cleaning oven back in 1982 that had a special catalyst material all over the interior. It didn't have a special cleaning cycle, instead autocleaning each time a small splat of oil/fat hit the walls. We had it until 2000 and it was always spotless. It even survived my wife deciding to need to clean it with some chemical product thinking that would make it cleaner than clean. We would have it now still if it weren't for us selling the house it was in.
In our current house purchased in 2000 we got a new oven that had self cleaning liners covering some 60% of the interior so now we have to periodically remove liners and go through and clean the oven manually and the liners are always spotless.
Why would anybody think that liners covering 60% of the interior would be adequate?
I'm interested in hearing from anyone who can shed light on why we now think that we need to heat the oven interior to 600C to clean it when the catalyst seemed to work well at less than 300C over nearly 20 years.
The conspiracy theorist in me says MrMuscle had something to do with it :-)
@David: He's an 18-year-old lad with no interest in science or technology...
It's so sad -- I am the dad I wish I'd had (if you see what I mean)
I keep on trying to interest him -- I'd love to teach him microcontrollers and electronics and stuff -- but when I show him flashing LEDs and things he just says "That's very nice Max" and then he wanders off to do his own thing :-)
@Max...caustic chemical for cleaning ovens,,,,I think that is caustic soda (Sodium Hydroxide) - they still use it for cleaning drains, which is fortunate as that allows me to steal some for developing PCBs :-)
Re Joseph - "He's an 18-year-old lad with no interest in science or technology" ... not even in cellphones? Couldn't he call you or G then G for help? A teenager without a celphone would be a unique beast indeed....
@SA_Penguin: I've never heard of a self-cleaning oven...
As Victor said, the self-cleaning cycle raises the temperature way high -- all that's left afterwards is a thin sheen of fine white powder around the inside of the oven that you wipe off with a damp cloth.
I remember the gas ovens when I was a kid -- my mom used to have to put some caustic chemical foam thing in there to clean it -- after which the food tasted funny (well, funnier than usual) for ages...
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.