we are trying to create a baby bottle warmer for our project , our main goal is to achieve even heating?

Question

we are trying to create a baby bottle warmer for our project ( biomedical engineering field ) , our main goal is to achieve even heating . we thought of using the vibrators so that it will vibrate and shake the liquid in the bottle and generate an even temp throughout the bottle.

can any one tell me if this is a good idea, and if we plan on using the vibrators,what is the speed of the vibrator we should use and what is another way to measure the temperature to assure even heating of the bottle.

Answer 1

Since it is a school project and you need to do something.

Those insulators cups that people use for cans or bottles of pop/beer. Make one with an inside diameter equal to the diameter of a baby bottles, wrap a uninsualted wire around the tube, then connect the end of the wire to some batteries. The wire will get hot with the electric current running through it. Can easily add a toggle switch to turn it on and off.

Not sure on wire diameter or size of batteries. You will need the the wires embedded and insulated from the bottle. But that will give you uniform heat throughout the tube.

Answer 2

If you use a vibrator, the milk may end up as butter.

Microwave heating is great, but you need to shake it afterward to get an even temperature throughout the bottle.

Try a water bath (Google for "bain Marie"): Heat the water, in which the bottle is equally warmed.
Slowly moving the bottle during the heating process may guarantee an even temperature.

Measuring the temperature inside the bottle can be hard, if you don't want to choke or blind the baby with thermocouple wires or whatever you may want to put inside the bottle.

Try putting some drops on the back of your hand... If it hurts, it is too hot. If it feels cold, you need to heat it more.
Cheap and functional throughout the ages.

You can also construct a special cap with a cheap common thermometer like an alcohol thermometer fixed in it. (Mercury thermometers are not to be used anymore.)

Answer 3

a vibrator seems rather energy intensive to reach the temperatures you would want... especially when resistance heating is so efficient.

I would make something similar to a bag reactor.
By placing the formula in a rectangular sort bag and placing it on a heating plate that rocked back and forth, you would have both good heating and contact as well as even mixing which is analagous to even heating.

These rectangular bags are often used as inserts in bottles to keep the baby from sucking in too much.

check out these wave bioreactors for a visual aid to what i'm taking about:
http://www.wavebiotech.com/products/wave_bioreactor/index.html

(To find the temperature you could leave enough time for the plate and bag to equilibrate. By doing this you can assume the liquid temperature would be the same as the plate. Check out a heat transfer book to solve for the time for this given heat transfer coeffs and the like and the heatload of the formula itself)

I'm also assuming this is a school project and as such your professor is looking for a better answer than "just microwave and mix it".

Good luck, Cheers

Answer 4

For even megababes I should think a microwave would give the smallest temperature gradient in the (non-metal)container.If you are concerned about mechanical mixing you should should aim for maximum turbulence with splashing.mums of bottle fed babes used to shake the bottle in the direction of it's long axis(mums know best).
The only reliable to check the temperature at time for deployment Is for a fit adult to shake a few drops on the wrist: Bare in mind that warm babyfood is a very excellent method of growing any stray bacteria;so warm it quickly,use it ditto.
Finally'with any luck you will design a megabuck robot almost as good at 'mixing formula' as A MUM.I dare not go fully into physical methods of temperature measurement but solid state (semiconductor) methods in a thermowell might do, provided the thermowell canbe kept sterile in constant use.
Makes you fink dunnit;praps mums new nuffink

Answer 5

My recommendation is that you ditch that idea and study your subject better to come up with a workable solution, alternatively you could just purchase a bottle warmer from the supermarket or chemist and take it apart to see how it works.

A great exercise for the brain and thought process not to mention memory - Good Luck

Answer 6

A small stirrer whould do the job.. If u feel some dead zones arise then may u can she have the blades at two different places in the same shaft

Answer 7

Good idea!
Try to get a 'pulsatron'! It's tiny and gives intense vibrations!

Answer 8

Sorry but it's a rubbish idea. Why not come up with something to do with supporting breastfeeding? Bottles are for baby dolls, not humans.

Answer 9

When our kids were warm we found that the microwave does a great job ,and is a great sterilizer also.