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Old 01-10-2012, 03:44 AM   #1
taintedplay
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Default mini fridge collar

I have this mini fridge Magic Chef Appliance -- Product Detail Page

and it fits a single corny keg (without the door closed) but I have two. I was thinking of making a collar to make it longer by six inches to a foot, same height and width. How long can i make this collar and it still be able to keep it cool?

Was thinking to make it of plywood with a layer of sheet insulation on the inside

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Old 01-10-2012, 06:14 PM   #2
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anyone? I can draw a mockup if that helps if you dont understand.

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Old 01-10-2012, 06:31 PM   #3
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this has been done before, i'd make it as small as you can where you can insulate it and still fit your 2 cornies. realize that the cooling system of such a small fridge is not built to cool such a large thermal mass, so temp changes will be slow when you put 5 gallons of room temp beer into it. it won't cool in an hour.

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Old 01-10-2012, 07:56 PM   #4
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could i double the size of the minifridge? i cuold use two pieces thick of insulation. I would like to be able to hold 4 if possible. And is there anything i can do to help it cool down quicker?

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Old 01-10-2012, 09:19 PM   #5
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anything more than 2 corny's is going to be risking going beyond what the fridge can cool. you can build it bigger, but it only has so much coolant and so big of a heat exchanger plate to cool with. like i said, keeping things at a temp is easy, it's bringing them down to temp that hurts.

for the amount of time and energy you're going to spend expanding a mini fridge to a size it can't cool, get on craigslist and find a cheap/free fridge and put a temp controller in it. my regular sized upright fridge holds 4 carboys or like 8 corny's without a top shelf that could probably double the capacity.

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Old 01-11-2012, 01:17 AM   #6
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I used a mini fridge and extended the front of it by 24". I installed two small 4" fans on the inside to help circulate air and used 1" insulation in the inside and sealed all of the seams with flashing tape. I do not use it as a kegerator but as a fermentation chamber. I have done cold crashes in this chamber at 35 degrees F. It does kick the compressor on more often as would be expected. Before I added the two fans it would run constantly to stay at cold crashing/serving temps. It can be done, just make sure you have something to keep the air moving inside.

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Old 01-11-2012, 06:14 AM   #7
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I just finished putting a collar on my mini fridge. It ended up adding 12 inches to the the front of my Sanyo. It now holds 3 kegs. Im going to be using it as a kegerator. I can post pics if you're interested.

I definitely agree with MrMeans on the fan part. It is a must.

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Old 01-11-2012, 06:54 AM   #8
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I built a fermentation chamber based on the same concept -- basically created a "porch" that probably doubled the volume of the fridge by enclosing the whole thing in some plywood (actually OSB). I lined it with 2" closed-cell foam insulation and taped off the seams.

I was wondering if I could get it down to lagering temps, so before I added temp control I kicked the fridge on at the lowest setting and stuck a pint glass of water and a half-full 5 gallon bucket on the floor. Within a few hours, it froze the water in the glass and created an ice film on top of the bucket.

I'd say if it's well insulated and you have good thermal mass in there (like a corny keg), a typical mini fridge should be more than powerful enough to do what you want.

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Old 01-11-2012, 06:57 AM   #9
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Here are some pics of what I did. I got the idea from someone in the "show off your fermentor" thread:





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Old 01-11-2012, 01:29 PM   #10
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Quote:
Originally Posted by mmccurdy View Post
Here are some pics of what I did. I got the idea from someone in the "show off your fermentor" thread:





That is awesome. well my problem is solved. thanks for the great idea
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