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Thread: Thrifty Easy Bean Cooler and Corretto Unloader.

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    Thrifty Easy Bean Cooler and Corretto Unloader.

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi CSrs,

    I am not aware of, nor have I made any attempt to search to see if similar equipment has been described, so my apologies if this is old hat.
    After a backbreaking weekend commissioning the new Corretto Mk2 etc. and over roasting a little more than I am comfortable with, I decided that the ending of the roast and the switch to cooling the beans could be easier and more effortlessly managed.
    Here is the fruit of my thought plus a little effort to throw together a prototype using available materials, just to confirm that the concept was a goer.
    A trip to Bunnings and/or Hot Bargains would enable a more professional management of the hose to pail connections and a more robust piece of equipment to be constructed without blowing the bank.
    For the prototype I drilled and cut the holes in the pails and lids with my pocket knife (a hole saw would have been better?)
    Materials used for the prototype:
    A length of food grade PVC tubing, for use as a bean pickup tube (a piece of metal tube could also contribute here)
    A recycled Milo tin, with top and bottom removed, to act as the bean collector and cooler
    A piece of second hand metal flywire mesh removed from a job to be completed before summer takes root
    A piece of wire or cable ties to hold the flywire to the Milo tin to make the sieve used as the hot bean collector and cooler
    5L. and 20L. plastic pails with lids
    Some hole cutting gear and the use of a vacuum cleaner
    The photos below I believe fully illustrate the device and save a lot of words, but if there is anything unclear please ask.
    The prototype will see baptism of fire probably next week end, testing to date has convinced me that itís a goer.
    Even at very low vacuum settings it quickly and effortlessly lifts green beans from a bowl.
    I have for some time used the vacuum cleaner to cool the fresh roasted beans and know that is effective.
    Hope this contributes to our collective convenience.

    Kind Regards
    Lindsay









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    Senior Member flynnaus's Avatar
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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Sounds like a good idea and has the possible added advantage of de-stoning the roast.

    Question: Would the heat from the corretto melt the plastic tubing or hot beans melt plastic off the inner surface of the tubing as they make their way to the cooler?

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.


    Very nice work Lindsay, I really like the idea of a bean unloader for hot and dangerous home roasting contraptions.

    Quote Originally Posted by 6A607562626D797F0C0 link=1254874010/1#1 date=1254874730
    has the possible added advantage of de-stoning the roast
    All it will need to make it a destoner is to add a tap (or similar) to the bucket so that you can vent some air to "tune" the suction pressure.

    That way you can set it to only just lift the beans the height of the tube, leaving anything more dense in the pan.


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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Lindsay,
    I love your idea, it could even be permenantly mounted in the bottom of your roaster with the right materials and a door similar to a hopper, and simply drop them out at the end, ive been playing around with some ideas for a KKTO sort of modified, with a proper bean cooling tray with tuning blades and stuff, ive been trying to work out how to dump from the KKTO into the cooler at the end of the roast.........this could be the answer! thanks lindsay!

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    I could possibly convert my existing setup to this by adding the lid back to the bucket.

    I like.

    I once dropped a 500g roast when transfering the beans by removing the pan from the corretto and carrying it to the cooler.

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Quote Originally Posted by 437F6279737265707873170 link=1254874010/4#4 date=1254876890
    I once dropped a 500g roast when transfering the beans by removing the pan from the corretto and carrying it to the cooler.
    I had a laugh, you must of been so disappointed in yourself that you would of had to laugh.......that sux!

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Quote Originally Posted by 1C203D262C2D3A2F272C480 link=1254874010/4#4 date=1254876890
    I could possibly convert my existing setup to this by adding the lid back to the bucket.

    I like.

    I once dropped a 500g roast when transfering the beans by removing the pan from the corretto and carrying it to the cooler.
    I knocked over a bag a greens and spent some time digging them from teh cracks in teh veranda..

    So TG... As part of QC; did you just bin or did you do a risk assessment and collect what you could ?

    Could you also provide the RCA and what actions you have implemented to resolve teh RC ;D

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    (back on topic gents)

    The other advantage of sucking the beans from your roasting device is that the residual heat in the roaster remains so you can do a back-to-back roast easier and faster.


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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Quote Originally Posted by 745B514C350 link=1254874010/7#7 date=1254878322
    (back on topic gents)

    The other advantage of sucking the beans from your roasting device is that the residual heat in the roaster remains so you can do a back-to-back roast easier and faster.
    OK..

    Am thinking as to a mod to my Cooler and KKTO as it would make things easer and safer...

    As to thermal mass and back to back batches... Not a Problem for teh KKTO ;D

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Im thinking along the lines of pull or suck, and push or blow into cooler? i wonder.....anyone have any thoughts on whether a vac has teh power to blow the beans from a collection bin into a cooler?, so unlike the OPs mine would simply transfer from roaster to cooler..... 8-)

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Quote Originally Posted by 7A7E584141445B4C432D0 link=1254874010/9#9 date=1254879017
    Im thinking along the lines of pull or suck, and push or blow into cooler? i wonder.....anyone have any thoughts on whether a vac has teh power to blow the beans from a collection bin into a cooler?, so unlike the OPs mine would simply transfer from roaster to cooler..... 8-)
    ALWAYS SUCK.... As others have seen and tried... It helps with de stoning and once ya get teh flow right; it works well.

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.


    I think blowing will push the rocks in first... :)
    Sucking will allow destoning too.


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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Hi Guys

    Funny you should mention blowing WS, AM and Andy.
    Had some very serious commercial interest out of CS Afghanistan.
    Although not as convenient to use as the Aus Model the Afghan model has training applications.
    Already 2 containers on order.
    On this model the blowing side of the vacuum cleaner is used, although an optional extra is available for the vacuum side of the vacuum cleaner which utilizes the latest flame thrower technology to roast the beans in mid air and for other Heavy Duty applications.

    Lindsay


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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.


    I have a couple of kids that would love to chase their ol man around the snobbery with one of those.

    ;D

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    Senior Member flynnaus's Avatar
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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Well once there were pea-shooters. No reason why you cant have bean-shooters.

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Just reflecting on the possibility of utilising this device as a de-stoner.
    The original photos show an orange coloured fitting on the vacuum cleaner hose to the pails. This is the standard old Electrolux air bleed to the vacuum hose and could be used to tune the vacuum pressure.
    I believe the de-stoning function would be best employed post cooling as a single purpose activity rather than at the critical roaster unload/cooling stage.

    Lindsay

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    do you think you could just use a metal flywire bag in the vacuum?
    just suck them up, keep it running to cool then dump them out?

    or would the heat make short work of the motor etc?

    its a great idea but, as dumping the beans from any of my ideas has been the major issue but i reckon we now have a answer of sorts :)


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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    please excuse my ignorance, but how many stones are you guys getting, just out of interest, i havent come across one yet :o

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Hi Leeham,

    I think the success of the vacuum cleaner in dealing with the task using an internal metal mesh bag would depend on the mass of the beans and the specific design and structure of the vacuum cleaner.
    With the equipment I have been using, I had no concern when roasting 600 green gram roasts but at 1000gg I do need to be more considerate of the equipment.
    I am a newbie after all with only 1 x 1000 green gram roast mostly still in the cupboard and so many other considerations during the roast time.
    I think 1000gg was an over stretch for my equipment I have no plans to repeat this roast size but expect to try 800gg next time.

    Some considerations of the bean collector cooler dimensions.
    I like:
    - the thought of a cooling bean mass with parallel upper and lower surfaces where I could expect the air movement would be similar at any point through the bean mass but acknowledge the way the delivery tube will distribute beans may be less than ideal (whether this will be a significant departure from the ideal, I do not know.
    - that the bean mass is over square (diameter>height) my thought is based on minimising the cooling period where all beans have a relatively similar cooling profile.
    - the relatively large capacity of the 20L. pail and the high rate of air movement (suggest dilution of hot spots) give me comfort that overheating will not lead to component failure (PVC melt or vacuum cleaner impeller/motor failure).
    The internals of my old Electrolux are metal and have coped well with my practice of using this machine for cooling of all roasts from 85g. from the popper to 1000green grams from my Corretto Mk2.
    The 1000green grams from my Corretto Mk2 through the old Electrolux left the internals warm/hot but I did not think to measure temp as my thoughts were elsewhere.

    Lindsay

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Hmmm,

    PVC is not a good option for hot environments. I cant remember the exact temperature that it begins to break down at, but I do know that it it below 100C (when I was home-brewing the consensus was not to use PVC for transferring the hot wort which is at around 100C).

    PVC (poly vinyl chloride) breaks down into vinyl chloride which is a known carcinogen. Nasty stuff.

    Other than that, great design!! Im sure you can use something other than PVC and itll be fine.

    Cheers
    Stuart.

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Hi Stuart,

    In scanning the Wiki article on PVC I did not find any reference to this relatively low temp degradation, melting point is listed at 100C - 260C.
    When PVC is burned nasty things happen for sure.
    I felt comfort from the product description "food grade" and the transient heat involved.
    This is a prototype device and we have a whole community of practical CS research scientist/engineer/technologists here, if material improvements cant be made, I would be surprised.

    Lindsay

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Quote Originally Posted by 68474E4C5B644847484E4C444C475D290 link=1254874010/6#6 date=1254877887
    Quote Originally Posted by 1C203D262C2D3A2F272C480 link=1254874010/4#4 date=1254876890
    I could possibly convert my existing setup to this by adding the lid back to the bucket.

    I like.

    I once dropped a 500g roast when transfering the beans by removing the pan from the corretto and carrying it to the cooler.
    I knocked over a bag a greens and spent some time digging them from teh cracks in teh veranda..

    So TG... As part of QC; did you just *bin or did you do a risk assessment and collect what you could ?

    Could you also provide the RCA and what actions you have implemented to resolve teh RC *;D
    Binned in case someone other than myself might end up consuming them.

    Action taken = learning from my mistake.

    Root cause was not using the correct (usual) gripping tool for carrying the pan.

    Quote Originally Posted by 68474D50290 link=1254874010/7#7 date=1254878322
    The other advantage of sucking the beans from your roasting device is that the residual heat in the roaster remains so you can do a back-to-back roast easier and faster.
    I tried 3 back to back roasts once in my corretto and the motor shut down.

    After cooling all returned to normal.

    It seems theres a temp sensor within the motor separate to the usual one around the pan area.


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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Quote Originally Posted by 494D6B727277687F701E0 link=1254874010/17#17 date=1254901855
    please excuse my ignorance, but how many stones are you guys getting, just out of interest, i havent come across one yet :o
    No many in most beans but something like the dry process Ethiopians might have one small stone per kilo.


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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Quote Originally Posted by 042B213C450 link=1254874010/22#22 date=1254910849
    Quote Originally Posted by 494D6B727277687F701E0 link=1254874010/17#17 date=1254901855
    please excuse my ignorance, but how many stones are you guys getting, just out of interest, i havent come across one yet :o *
    No many in most beans but something like the dry process Ethiopians might have one small stone per kilo.
    Have had crap at least twice... Once looked like pumice and another time broken china ?

    http://coffeesnobs.com.au/YaBB.pl?num=1136439267/

    then a working de stoner vacuum system buy some other CS...

    http://coffeesnobs.com.au/YaBB.pl?num=1214198025/

    and instructions here http://cafe-grendel.blogspot.com/2008/06/big-news-sud-arrives.html

    A bit of a review and slight mod and you have a cooler / transport system etc..

    A cheep $15 steel Wast paper bin from teh cheep shop and a large Milo tin etc and the issues of Heat and plastic is resolved...

    Note: While the specs may say that the PVC has issues after a specific temp... It does not guarantee that other fumes and crap is not released at lower temps..

    Go the cheep metal option and solve all ya problems in one go..



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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Quote Originally Posted by 6A454C4E59664A454A4C4E464E455F2B0 link=1254874010/10#10 date=1254879494
    Quote Originally Posted by 7A7E584141445B4C432D0 link=1254874010/9#9 date=1254879017
    Im thinking along the lines of pull or suck, and push or blow into cooler? i wonder.....anyone have any thoughts on whether a vac has teh power to blow the beans from a collection bin into a cooler?, so unlike the OPs mine would simply transfer from roaster to cooler..... 8-)
    ALWAYS SUCK.... As others have seen and tried... It helps with de stoning and once ya get teh flow right; it works well.
    Quote Originally Posted by 6A454F522B0 link=1254874010/11#11 date=1254880568
    I think blowing will push the rocks in first... :)
    Sucking will allow destoning too.
    sorry i guess i didnt explain it well, i meant, suck the beans out into a sort of temp holding bin like the OPs then blow them from the holding bin into a cooling tray, sort of simultaniously. Not sure yet if its feasable.......love designing stuff like this, i have about 10 pages of sketches at this stage ;D

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Hi CSrs,
    I put the vacuum unloader cooler through its paces today and what an improvement on my previous roast endings, almost automation.
    Discussions were in part concerned about the heat impact on the PVC. My impressions using this device for just one roast are: A metal pick up tube should be strongly recommend, the 30mm OD food grade PVC tubing apparently handled the heat fine, but for the first at least 300mm I would recommend metal, as it is very hot down there in the Corretto, a lot of radiant heat. I was very happy with way the unit functioned; this device will make home roasters work easier.
    Kind Regards
    Lindsay

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Thanks Lindsay

    After twice today forgetting to pull the TC probe out of the side of my BM and yanking on the bucket going "WTF!! come out you......"

    I am going to build a vacuum un-loader

    my freegan vacuum came with a metal handle :), thanks for the heads up and feedback about heat etc, I just need the right bucket and lid to fit my colander.

    Leeham

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    as a follow up on this and I see Wsully is building one as well.

    I am yet to complete mine but i have found a problem worth noting.

    The heat from the beans (hot air) has effected the vacuum hose linked from the bottom of my cooler (bucket and colander) to the vacuum. It actually got so hot the force of the vacuum squashes the plastic hose and reduces the airflow. I had about a 1.5 meters between them.

    i solved this by making a very short connection from bucket to vacuum, another idea might be to use a hard pipe liner inside the hose? better quality vacuums may not have a hose issue?


    it is effective as it pulls the temp of the beans down from 200 to ambient in about 2mins with a bit of stirring

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Quote Originally Posted by 414D444949402C0 link=1254874010/26#26 date=1255776549
    forgetting to pull the TC probe out of the side of my BM and yanking on the bucket going "WTF!! come out you......"
    giggled like a schoolgirl... Opps... Have done the same thing with my KKTO....

    Man those probes are strong >:(

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    Re: Thrifty Easy Bean Cooler and Corretto Unloader.

    Behmor Coffee Roaster
    Hi CSrs,

    At the birth of the bean unloader I was in the process of increasing my roast mass from 600green grams to 833green grams, now a few roasts, unloads and reflections later and taking on board the thoughts of Flynn aus and Leehams observations. It has finally dawned on me that we are handling a fair bit of heat here.

    I would recommend minimising use of plastic and substituting as much metal tube as possible at least before the cooling colander/sieve and beyond if a plastic vacuum hose is the other alternative.

    With my unit I noticed that a piece of stiff plastic tube had softened and partly collapsed and will require replacement with a metal tube, that was in original photo 3 (the bean tube through the 20L pales lid).
    This was due to it being buried in the hot beans as it protruded into the cooling colander/sieve.

    Current structure:
    1. metal tube to pick the beans up from the roaster.
    2. flexible food grade 30mm OD tube (for convenience- I need a longer piece here).
    3.stiff plastic tube which softened and will require replacement with a metal tube.
    4. cooling colander/sieve unchanged.
    My vacuum cleaner has a very substantial steel wire reinforced hose which apart from the metal fittings did not get noticeably hot, so I have been somewhat oblivious to the amount of heat we are dealing with.

    Kind Regards
    Lindsay



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