Half a croissant, on a plate, with a sign in front of it saying '50c'
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Hot-n-Cold Plate

Serving Plate Keeps Both Hot Foods Hot and Cold Foods Cold
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Some food contrasts go well when eaten together. For instance, some people like Sweet-n-Sour ribs. Some people like a nice cold drink to go with their hot meal.

The Hot-n-Cold Plate has one half for keeping hot foods hot, while the other half keeps the cold foods cold. A Peltier Effect electric heat pump maintains a temperature gradient which keeps the hot half of the plate hot, and the cold half of the plate cold. It's powered by a rechargeable battery and can be plugged in to a wall outlet.

You can keep your hot hamburger and bun on the hot half of the plate, while keeping your cold crisp slices of pickle and tomato on the cold half. Slap it all together just before biting into it, and enjoy the complementary contrasts in your mouth.

sanman, Jan 08 2014

Like this http://www.youtube....watch?v=UTSdUOC8Kac
The basic concept appears to be a pretty old Idea [Vernon, Jan 08 2014]

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       Excellent.   

       Be aware that battery life will be pretty low - Peltiers are hungry.
MaxwellBuchanan, Jan 08 2014
  

       [+]   

       The plate should actually be two separate, removable units - probably in stainless steel - rather like a sandwich toaster. Then they can be removed for washing, and new ones just dropped in (held by magnets to maintain good contact ?)   

       Low partition between the halves to prevent inadvertant mixing.   

       Heating peltier under one side, cooling on the other, linked by a heatpipe or just a big block of Aluminium.   

       Small insulated assembly area off to one side ?
8th of 7, Jan 08 2014
  

       Yeah, I was going to mention some more stuff like that, including also color-coding the 2 halves to make it obvious which is the hot half and which is the cold half.
sanman, Jan 08 2014
  

       //Be aware that battery life will be pretty low - Peltiers are hungry//   

       Not an issue, you can claim some of the electricity back by incorporating a second Peltier. This will use the temperature difference generated by the first Peltier to generate current.   

       Just a matter of joined up thinking.
bs0u0155, Jan 08 2014
  

       if IR lamps are anything like Peltier elements, simply reverse the polarity on the lamp.
bs0u0155, Jan 08 2014
  

       Actually I like this idea a lot. It'd be pretty simple to incorporate a microcontroller with thermistor/thermocouple sensors. You plop your hot/cold dish on the plate. Initially, the plate does nothing until the temp readings stabilize... they will be either hotter or colder than RT. Then, the micro controller just maintains that temp.
bs0u0155, Jan 08 2014
  

       This would be very useful for people who find themselves temporarily without good waiting staff.
MaxwellBuchanan, Jan 08 2014
  

       Oh no, not again … we forgot that your Great- Aunt Malevolentia was staying over New Year.   

       Presumably she appreciated her Christmas gift from Sturton, which does not surprise us; however, it was clear from the beginning that any situation involving your Great-Aunt and Sturton's well-intentioned, inadvisable but sadly all-too-successful attempt to combine an industrial ceramic Assegai blade with a 2- stroke powered grass trimmer was going to end badly for someone.   

       How many did you lose this time ? Not all of them, shirley ?
8th of 7, Jan 08 2014
  

       She's not actually an "aunt". It's hard to say what she is, exactly, but "adopted vagrant" comes closest. We were very pleased when, this Christmas, she stopped biting the dogs.   

       Incidentally, Sturton sends his best wishes and says that he will return your "items" as soon as he can work out how to get them through customs.   

       The intercalary also says to say "hi". Hi.
MaxwellBuchanan, Jan 08 2014
  

       Vernon - this Hot-n-Cold plate isn't just limited to hamburgers. I just used the hamburger as an example. Wow, was that Jason Alexander's real hair?
sanman, Jan 09 2014
  

       //Not an issue, you can claim some of the electricity back by incorporating a second Peltier. This will use the temperature difference generated by the first Peltier to generate current.//   

       read up on your thermodynamics, you can not gain more electricity than the original peltier used, and since you are suddently using head to power a peltier the plate wont get warm...
sisseck, Jan 09 2014
  

       //read up on your thermodynamics, you can not gain more electricity than the original peltier used, and since you are suddently using head (heat?) to power a peltier the plate wont get warm...//   

       It's OK, any electrical energy deficit can be made up with power from a small wind turbine, which will work anywhere on account of it being powered by an electric fan. The fan is solar powered, which would normally present difficulties at night, however, a bank of floodlights should solve that problem.
bs0u0155, Jan 09 2014
  

       Stop ruining my invention, people. >:| This is not Tom Swift and His Electric Floodlight-Solar-Fan-Turbine Thingamajig.   

       This is a Hot-N-Cold Plate, which means it's just like a regular Hot Plate, but it also does Cold. The purpose of this is so that you can have both hot and cold stuff served together.
sanman, Jan 09 2014
  

       //Tom Swift and His Electric Floodlight-Solar-Fan- Turbine Thingamajig//   

       Now THAT'S an Idea/alternative name for the 0.5bakery.
bs0u0155, Jan 09 2014
  

       // Tom Swift //   

       Respect.   

       //
8th of 7, Jan 09 2014
  
      
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