Now I get it.
This one of my better but simple ideas
My intension is to use it with an exhaust fan fitted to the bottom of the 20lt bucket
But I cant see any limitations to it been used just as it is with fan blowing from above and no bucket as long as it is raised off the ground to allow air flow to pass through
Inserts for 20lt food buckets
I used Nilex round plastic basins with handgrips but $2 Dollar shops may be cheaper for similar basins
It fits to perfection inside the 20lt food bucket to act as a guide for most cooling devices or fit a screen to make it a flat bottom cooling colander in its own right
I have cut the centre of the bottom of these basins leaving a 20mm lip left on the inner edge
The ring handle fits firmly over the buckets lid edge to form a good seal but can still be easily removed on and off if required.
The lip thatís left on the inner edge after the centre has been cut out is to accommodate several cooling implements from colanders and steamer inserts to fitting a purpose made screen
The main reason I chose this is
Flat surface to cool the roasted beans fast (as opposed to a concentrated mass of beans)
Cheap to buy
Easy to make
Now for some pictures
From left to right Drawing of set up, basin with centre cut out, basin outer
With steamer insert view from above, view from below, how a colander fits (Note colander fits better without handles)
Now I get it.
Another great thing about this system is that it is stackable
You could add different or appropriate screen sizes e.g 1mm, 2mm, 3mm, ect to each basin
That way you could make an easy de-stoner, all one has to do is hand sift it
Latest update *;)
Hope it helps others that follow *:-/
Simple ideas are always the best.
Ok here is an update and a building pictorial of the finished & updated Model # 2 cooler with insert
Aptly named by fellow Coffee Snobs as the Kosmic Kooler
I was delayed from building it sooner by having to wait for 2 new free buckets
1 x 10lt & 1 x 20lt
The 20lt bucket fitted with exhaust fan on bottom slides inside the opening of the 10lt bucket
Thus creating a base and also encasing & leaving plenty of room for fan clearance
What gave me the idea in the first place? Some history
The backpack vacuum pictures are from my original idea before I built the first bucket cooler Model # 1 (yeah crude I know but it worked)
Koffee Kosmos - *Building pictorial of the Kosmic Kooler Model # 2 with insert
History 2 pictures of the original backpack vacuum cooler, *Its what sparked the idea
Take 1 X 10lt bucket & 1 X 20lt bucket and fit exhaust fan to bottom of 20lt bucket
Place 20lt bucket inside 10lt bucket with exhaust holes, place insert on 20lt bucket opening (see post #1 for insert building details)
With steamer inside insert , beans now cool too easy, Optional stand (formally an umbrella stand)
Well thats what I did today *::)
Over the next couple of weeks I will be re-building the turbo roaster
How is this bean cooler going KK?
Thanks for asking runfast
It is my best one yet
Easy to use, easy on the eye, easy to store away, easy to clean
And it only takes just 40 minutes to make
Total cost was $2.00 for the exhaust fan (garage sale)
All other parts were free
Best 2 bucks I have ever spent
It cools beans down to room temp in about 1 minute give or take
Leave them in an extra minute longer and they are cooler than room temp? well at least cooler to the touch.
nice looking unit I must admit Im a bit lazy and just pull my roast a bit short on the Gene Cafe and allow the cooling cycle of the GC do do its thing...
Gday all, here is a post about my bean cooler project , lots of images .. well it is made from a grape harvesting bucket, a large exhaust fan and a geology sieve. The bucket was heated in the sun on a hot day and the exhaust fan pushed down into the bucket where it sits pretty securely, maybe it will get siliconed later.The exhaust holes are 57 mm drilled with a high *quality holesaw and the bucket was cut out with a jigsaw.The geology sieve sits on the top with no need to be sealed in. heaps of suction, in a test last night it cooled 100g lots of beans in about 30 seconds ,( the most my overworked B&D popper can handle) I reckon it could do a kilo no probs. Very quiet *and buggerall vibrations as the bucket is food grade poly. Thanks to all of the ingenious posts here I have been inspired. next project is my corretto, Just waiting for the heatgun. Images follow, they are pretty small file sizes so should download quickly...by the way it has had a clean before use ;) Cheers from Gaz
Where did you get the sieve?
Should work a treat.
You can pick up a sieve like that one at a camping store...About $29.00
While waiting for your reply I located some online so rang to enquire.
These ones were for seed sifting.
The bloke said they normally were sold in sets of 10.
When I explained I only needed one he said there were a few in the warehouse that somehow were loose and offered to check the sizes for me.
Before I let him go I asked about the price and he told me about $49.
They were top of the line" he assured me.
Stainless steel and hand finished.
I thanked him for his time.
But at $29 for a camping store one I might have to reconsider the other one now for the "bling" factor.
One of the reasons I made the insert is that people could use most forms of kitchen implements from steamer inserts to wire strainers to hold the beans being cooled.
That said I do know that the gold prospecting sieves look like Gazs
TG they cost $27.00 AU up to $68 for the giant ones
Site has different wire mesh size same price
sorry I couldnt reply sooner TG , work is the curse. :(.yeah as the other posts have said ,, camping stores are the go , I picked up two for $40 the other was nested inside the one I used , but had a bigger mesh size , I thought the smaller mesh size would give more cooling effect (like metal to bean ) but I will try the other one and keep everyone posted , and take a few pics as well , Cheers Gaz, ps look forward to the posts KK ;)
I like the Idea of the fan blow up through the sieve as I have found with pan roasting a fair bit of chaff comes of during the cooling so the blowing is much better than sucking.
Yes , Im going to reverse the fan and try the positive pressure as well , as the fan isnt fixed it is an easy thing to compare , I think I will put a cutout 5 litre cream bucket inside the outer of the sieve in case the beans decide to levitate, will get back later with the results, Gaz
Ive always sucked the air through the beans, but all the loose chaff is dispersed when Im roasting in the Corretto.
I decided in the beginning that if there was a chance of the beans blowing away then I wasnt going to risk it.
TG you have a very valid point there , and after trying the positive pressure version for experimentations sake, I totally agree , to go through all the trials and tribulations involved losing beans is not worth thinking about, :( I am a biodynamic farmer as well , and I realize the love and care and sometimes heartache and despair involved to nurture a living thing to its ultimate reality. ;) I am sticking with the negative pressure (suction) method as well.Cheers Gaz,ps I had a good look through the roasting section today,.I have to include this:Originally Posted by -Alchemist- link=1134076855/140#157 date=1191837026
My setup (of the last few years) comprises a generic bathroom exhaust fan providing positive pressure through a 300mm sieve and has never looked like tossing any of the beans out. You guys must be using industrial strength blowers for your coolers.... :o
Yeah, somewhat similar to my setup, and I also have never come close to blowing beans out. Also even with the positive pressure setup I am seeing some buildup of muck on the top of my fan motor, would be interesting to compare motor condition after a few years of suction, compared to a few years of pressure.Originally Posted by Mal link=1222303036/0#18 date=1225799835
BTW I use a splatter guard from the kitchen ware section as my sieve they only cost a few $ and work very well.
Interesting stuff guys, my fan must be the turbo version, :P I have been thinking about the temperature change initiated between positive and negative pressure setups ie pushing as opposed to pulling air through the beans , so Im gonna try both with my thermocouple and see if I get any difference, btw, I have also thought of the resistance on the fan motor of both setups , and that might be something for someone a bit better with a multimeter, as backpressure on a negative displacement fan can be a problem as can reduced airflow from too many beans in the sieve.Hey Bullitt I just saw what a splatter guard is, would be a good alternative, the sieves were sold to me by a slightly unscrupulous camping store sales person when I was actually after a gold pan.. found out later they were for sieving rocks and have sat in the shed for 5 years collecting dust until two days ago.. Ill have to offer the shady bugger from the camping place a cup of coffee as payback [smiley=beer.gif] Cheers Gaz
I have tried it with fan sucking and blowing just to compare the differenceOriginally Posted by Bullitt link=1222303036/0#19 date=1225835357
Both ways work well
The blowing test
The insert I made (build details on post #1) completely eliminated any shooting beans as the cooling *surface sits deep approximately 150mm (6 inches) from the top of the rim so the beans that had the impetus to jump did not find freedom they just fell back down to rejoin their mates
Ill have to take some more pictures of my setup.
Consists of a 60L plastic garbage bin from bunnings - $9
Cheapest 25cm exhaust fan I found in bunnings - $15
Sieve from hot dollar - $4
Cut the hole in the bottom of the bin which was easy as the rim at the bottom was 25cm.
Cut a hole in the top.
installed fan blowing air up. Installed the sieve. Works great. Cools 500g of beans in less than 60 seconds.
Only thing is I have to sit the bin on some bricks to give it ground clearance. But thats not a problem.
FWIW, those "geology" sieves can also be found at bee/honey suppliers along with good food quality plastic pails but both are probably a little more expensive there than than most would want to pay for a bean cooler. I have 2 which I use in extracting honey but unfortunately they wont be living with my nearing completion corretto *:(
Stainless food grade sieves available on evilbay
$31.80 with free postage to Australia
My father in-law has given me a gold prospecting sieve and thats what I use now
However it is a finer mesh than in this photo
The wife wanted her steamer insert back ::) for cooking of all things :D
I explored the Bay of Evil and also looked at prospecting sieves but all were too expensive.Originally Posted by 2F2A2B2C3133373E3E580 link=1222303036/24#24 date=1237084835
I got my fine mesh sieve from the local $shop for $5.
I have been using a standard fan for cooling but for a while have wanted to go to an exhaust fan turned around to push, a sieve and bucket...keep the pictures coming folks!! :)
Ive also been looking at an extractor fan with friction fit in a bucket (both quite cheap from bunnings). The fit with the fan "extracting" is very neat, but not nearly so good if it is turned over to blow up thru the bucket, in that the motor is then above the blades and there is very little airspace beneath the fan.
My (electrical illiterate) question is; can the direction of rotation of an AC motor be reversed in some reasonably simple manner?
I think I had now better toddle off googlewards
I have always blown mine using an 18V leaf blower. With 500gm of beans they dont blow away but they are cooled in under a minute. Smaller batches I use a splatter guard to stop the beans blowing away.
Not a bad job barrelOriginally Posted by 2F2C3F3F28214D0 link=1222303036/29#29 date=1274798107
I am somewhat restrained with most of my designs
My wife wants neat & tidy units that can be stored away
I want plug & play functionality
So I try & marry the two together
Re-use the sieve from your pasta pot set, steal the wifes vac, a bucket and youre right to go. Cools the beans in only 30 secs...
Hey Borat thats a great cooler, i used the same idea but have since modded mine a bit more.
I had two issues with the same set up, for anyone else considering a vac bucket setup may want *to consider my issues.
1. the plastic hose starts to suffer from heat and will suck itself closed (implode) and then does not suck fast enough. To over come this i made the hose very short (10cm) and it worked pretty good for a while.
2. the motor on mine had a thermal cut out and back to back roasts would trip it and the motor would stop mid cool and you have to wait a while to it to cool down to restart. To overcome I removed the thermal cutout.
the third step in my cooler evolution was to take the motor out of my vacuum and attache it to the bottom of my "cooler" its still inside the "inner" plastic box but just crewed to the bottom of my cooler inner. now there is no tubes or big things sitting around as i mounted it inside my roasting bench ( which looks just like your bench *:-?)
they are a bit loud but ::)
down side is no more vacuum cleaner...... but it was a curbside freegan anyway....
You just need something to lift the fan...Originally Posted by 784D5E5C5A463F0 link=1222303036/28#28 date=1239883759
Similar evolution to mine.Originally Posted by 4B474E43434A260 link=1222303036/32#32 date=1274847644
However, I didnt have problem number one because my Sadie industrial vac has a hose 4 times normal diameter.
Problem 2 also didnt eventuate probably because my vac was industrial.
My new cooler does now have a vac motor inside the bucket.
This gets rid of the hose in the setup.
My sieve sits perfectly in the top of the bucket so is simply lifted out to empty the cooled beans into my bagging scoop.