Fridge/freezer-Instaling computer fan

Submitted: Friday, Feb 12, 2010 at 14:06
ThreadID: 75972 Views:3889 Replies:6 FollowUps:5
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I'm thinking of instaling a computer fan on a waeco freezer. I assume that its meant to be placed where the existing built in fan is. Is it best to make the fan suck the hot air out or blow air in? Any other tips for instaling a fan? Thanks
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Reply By: Roughasguts - Friday, Feb 12, 2010 at 15:07

Friday, Feb 12, 2010 at 15:07
Suck it out works for me! also If you create a lower pressure it also makes it slightly cooler.

Cheers.
AnswerID: 403918

Follow Up By: Maîneÿ . . .- Friday, Feb 12, 2010 at 19:30

Friday, Feb 12, 2010 at 19:30
Yep, I will second that for sure

Maîneÿ . . .
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Follow Up By: greybeard - Wednesday, Mar 03, 2010 at 10:30

Wednesday, Mar 03, 2010 at 10:30
blow the colder air in from outside. any 'gain' in cooling due to the minimal pressure drop wouldn't be noticed.

you are trying to get maximum efficiency from the cooling system, you will achieve this by decreasing the temperature of the air blowing across the condensor. sucking hot air that's allready absorbed heat from the compressor isn't going to provide a decrease in temperature.

the position of the fan in relation to the source of air is also important. with no baffling there is significant air spill between the high and low pressure sides of the fan reducing the useful volume of air moved.
Some test results for a different brand of compressor fridge with some info on fan placement.
fan in fridge
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Reply By: Member - mark f1 (VIC) - Friday, Feb 12, 2010 at 15:46

Friday, Feb 12, 2010 at 15:46
I fitted one to my fridge yesterday.It blows towards the motor, I chose that way as I could direct the straight at the compressor/motor. Drawing air away from the motor also draws air from the surrounding space
AnswerID: 403923

Reply By: Simon C - Friday, Feb 12, 2010 at 15:48

Friday, Feb 12, 2010 at 15:48
have a look at this post on anoither forum.....a lot of info.



http://caravanersforum.com/viewtopic.php?f=2&t=4729

Part of it is:


Fridge fans feedback
by Ole Mate on Tue Aug 18, 2009 11:00 pm

I know that there has been some discussion on this topic before, but I will post this for those who are undecided as to weather it is worth fitting them.
Our 3way fridge had been checked OK, it is well insulated, but being in a poptop can not be vented through the roof. It was always set on the maximum setting, and still struggled to keep cold.
I would put a couple of cans in the freezer an hour before 'happy hour' in the hope of getting something that resembled a cold beer. I had to do something, so I tried fitting a couple of fans.

One fan is mounted on the top vent, the other on an angled bracket so it forces air up into the cooling fins. They are wired in series, so they only use about 110 mA, and only the top one can be heard, from outside, about 20 cm away.

Last weekend we used it for the first time.
Before we adjusted the temperature setting, the food was starting to freeze, not just in the freezer, but in the fridge. We turned the setting down to about half.
The days were hot, but the evenings were cool, so they shut down at night.

My 'happy hour' beers were starting to turn to ice by the time I got to them.

2 x 80cm computer fans. $3.79 ea.
1 x 50deg Thermostat Switch. $4.95
1 x Toggle switch. $3.00
Some wire, zip ties, silastic, crimp joiners, etc that I had in my 'useful box'.

We are more than happy with the result.

Cheers
Bob
AnswerID: 403924

Follow Up By: Member - Allan B (QLD) - Friday, Feb 12, 2010 at 15:56

Friday, Feb 12, 2010 at 15:56
Bob, the question was about a Waeco Freezer. Your link was about 3-way fridges. A somewhat different application.

Cheers
Allan

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Follow Up By: Gary5167 - Friday, Feb 12, 2010 at 16:38

Friday, Feb 12, 2010 at 16:38
Any chance of some pictures and for those not technically inclined some instructions, thanks
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FollowupID: 673544

Follow Up By: PradOz - Friday, Feb 12, 2010 at 17:04

Friday, Feb 12, 2010 at 17:04
Hi Gary

Not sure if this is what you are after but have a look at the thread mentioned in reply below which is:waeco fridge mods

or this one for more ideas:fridge fans

but for van 3 way look at:van fridge fan mod

cheers....
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Reply By: Member - Allan B (QLD) - Friday, Feb 12, 2010 at 15:50

Friday, Feb 12, 2010 at 15:50
Jimmy, Take a look at thread 74817 Waeco Fridge Modifications.

Cheers
Allan

Member
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AnswerID: 403925

Reply By: Batt's - Friday, Feb 12, 2010 at 22:14

Friday, Feb 12, 2010 at 22:14
I have a computer fan blowing across my compressor which is in a 1mtr long timber box in my GQ
AnswerID: 403970

Reply By: Mandrake's Solar Power- Wednesday, Mar 03, 2010 at 10:14

Wednesday, Mar 03, 2010 at 10:14
Slightly off the topic - a little .

I have recently installed a 40mm centrigugal fan on the wall between the main compartment of the Waeco CF50 and the smaller dairy box --
The fan sucks air from the main compartment and blows it across and into the smaller one - this has dramatically improved the chilliness of that smaller compartment without any apparent detriment to the main area --
In degree terms a drop of 5 to 6 degrees C has been achieved -
Cost $4.60 and $7.70 for a new LED "festoon" bulb as with the fan running constantly the standard filament bulb didn't work ..

Cheers

Steve

AnswerID: 407036

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