h a l f b a k e r ySugar and spice and unfettered insensibility.
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As I paused in the act of Dysoning approximately 700 lbs. of dry
chemical flame retardant from nearly every surface of my kitchen, I
regarded the Dali-esque sculpture that was once a rather nice over-
the-range microwave oven and thought "there's got to be a halfbake
in this somewhere."
A mere
two days later, I have it.
This would be a one-piece unit, rather like an over-under
washer/dryer, that incorporates oven, rangetop, range hood, and
microwave (I suppose one could leave out the microwave, but
why?). In the event of a cooking fire, reasonably airtight barriers
would snap up from each side of the range (pushing any
overhanging pots or handles inwards) and make a seal with the
hood, isolating the fire. At the same time, the chamber thus
formed would be flooded with CO2 (some of which will have been
used to propel the barriers). Since this would happen very quickly,
spilled burning material would not have a chance to escape the
extinguishing chamber, and hands or arms would most likely be
knocked out of the way rather than trapped (as is the case with car
airbags).
Once the fire is out, if the chamber is completely sealed, it remains
that way until manually unlocked, preferably by a service tech. If a
complete seal was not made due to the unlikely occurence of a
limb or other obstruction, the barrier remains locked in place just
long enough for the CO2 to be depleted and will then release. The
extinguisher will hold an excess of gas to maximize the possibility
of success even in the event of an incomplete seal.
It seems like there should be more, but that's it, really.
Air curtains
http://en.wikipedia.org/wiki/Air_door
Non-solid barrier [BunsenHoneydew, Apr 07 2012]
Range hood fire extinguisher
http://www.regencyf...-hood-systems.shtml
[Klaatu, Apr 08 2012]
Under-hood extinguishers
http://www.hallfire...tml/fire_stop_.html
An inexpensive and equally messy solution to handheld extinguishers [Alterother, Apr 08 2012]
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It could detect the sound of panicky screaming ... |
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Why not have a spring-loaded silica-fibre curtain system - like a conventional fire blanket ? |
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For burning fat or oil, foam would be superior to CO2. |
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Has the possibility of ejecting the whole cooking appliance from the premises by use of a mechanism similar to an ejector seat, been seriously considered ? If no, why not ? |
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If the kitchen were kept filled with pure nitrogen, and those using it wore facemasks with flow and return lines so that no oxygen escaped, fires would quite simply be impossible. As a bonus, this would also kill all aerobic bacteria. |
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Foam, foam on the range,
quells the fear and phobia of flames;
Where seldom it's durned, that the kitchen got burned,
and the house is not smokey all day-ee. |
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I'm with [8th] on the ejector idea, but if you want an easy collective bun... |
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Cats, being nosy creatures, will happily hop up on the stove to see what's up, so a motion-sensor with a time-delay (to ignore occasional pot-stirring) to catch a feline busybody... |
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Foam is better, I know*, but I started thinking that in a
sealed capsule CO2 will be just as effective and the
ensuing mess will be minimal. As for triggering, I figured it
could use the same mechanism as those magnetic under-
hood canisters, a consumable plug that would melt and
release the propellant/smotherant gases. |
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I guess there was something more, after all. |
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*I'm pretty well-versed in
basic fire safety, for two reasons: 1) a long time ago, I
was
the last to take one step backward when a volunteer
for the position of 'safety officer' was requested, and 2)
things tend to catch on fire when I'm around. Occasionally,
I'm not responsible for it. |
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// Has the possibility of ejecting the whole cooking
appliance ... been seriously considered ? If no, why not ?
// |
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Yes, but purely for entertainment purposes. As a means of
fire safety, no. |
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Surely Halon is the stuff for this, rather than CO2.
At least, that was what we had, back in the day when the torpedo tubes were just aft of the galley. |
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Halon, once it's done, is incredibly easy to clean up, will put anything out, and tends to fall straight down without getting around further than required. It won't run off like CO2 does, so the seal isn't as important. |
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//If a complete seal was not made due to the unlikely occurence of a limb or other obstruction, the barrier remains locked in place just long enough for the CO2 to be depleted and will then release.// |
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Thus allowing the fire to re-ignite, because it hasn't had time to cool down? |
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How about impregnating the inside of the curtain-walls with Sodium Bicarb? >70C and it releases water and carbon-dioxide. |
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However, both microwave and regular oven could be rigged up with a zeolite nitrogen separator: when the door is closed everything except the N2 is pumped out. What could possibly go wrong ? |
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Is Halon illegal now, or is it on OSHA's shit-list for
some other reason? (Okay, so my knowledge is a little out
of date...) |
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Technically it's illegal, apart from certain very limited and specialized uses. |
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But, as with all such "illegal" things, it's just a matter of knowing the right (or wrong) people .... |
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I generally consider them the right people. |
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// Thus allowing the fire to re-ignite, because it hasn't had
time to cool down? // |
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It's a possibility, but high-pressure CO2 cools things pretty
damn fast. |
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It just occurred to me that the range should automatically
shut off when the extinguisher is triggered. I'd like to think
you've all been giving me benefit of the doubt and just
assuming that was part of the function... but I know better
than that. Obviously, still a work in progress. Perhaps I'll
incorporate all of these good ideas people have suggested
in a future edit. |
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Why not just build a Darwinian kitchen? Just replace the
burnt items with flame-proof substitutes and repeat the
process after your next 3 or 4 conflagrations. From then
on, you will only have to remove yourself from the
immediate danger of the flames for a few minutes. When
you come back, scrape the cooled charcoal scraps of your
venison sausages into the dog's bowl and start cooking
again. |
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My trunk caught on fire last week and all I could do was stare. That DIY fix did NOT go well. |
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What manner of trunk be this? |
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The trunk of my car. Where the battery is coincidentally located. |
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Oh, yeah, that SUCKS. Been there. My sympathies. |
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One could perhaps use an inverted high-velocity air curtain [link] to surround the range, rather than a solid barrier. Far less dangerous for squishy carbon units. |
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And pure nitrogen as the extinguishing agent. Released from a pressure canister, it would be rather cold, as well as displacing the oxygen. Recirculation from the hood to outlets in the range ought to serve as well as solid barrier containment. And dispersing nitrogen is essentially harmless to humans and their companion mammals. |
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I've been thinking about coming back to this one, writing
up a v2 incorporating all the great suggestions in the
annos. Been kinda off-and-on busy lately, but I'll update it
pretty soon. |
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[Klaatu], thanks for the link. I actually ran across that very
site, BION, in my pre-bake search. I also found the little
magnetic canisters full of dry retardant and bought a pair
of them <link 3>. The idea of this 'bake is that it would be
self-
contained to keep the mess (and the fire) from going all
over the kitchen, thus minimizing hours of Dysoning and
scrubbing of cabinets, countertop appliances, and
excitable dogs. |
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Also, Regency systems are big commercial/industrial
things. It says right on the frontpage that a permit is
required for installation. I'm not sure something like that
could be adapted for home use, no matter how
miniaturized. We want to put out a grease fire, not blow
grandma across the kitchen. |
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Wait, did I just say that? I must be ill. |
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For the record, I'd like to add that The Good Fairy Jenny
handled the extinguisher like a champ. The fire was out
before I even got there. |
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<just read this as> //Automatic-fire extinguishing cooking range and hood// |
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What about flambe though? |
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I think a simpler version would be a fire blanket that drops along with a dump of CO2 and powder or foam fire extinguisher. |
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Or an accurately targeted jet... |
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fireproof-cloth airbag...smother the flames, or you could use it to amuse small children by propelling Barbie dolls into low Earth Orbit. |
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