Keeping dirt out of the coils of an RV refrigerator?

John E Davies

Adventurer
This is probably a little off topic, but I hope I can get some suggestions. You folks are experienced with dust....

I have an Oliver Legacy Elite II travel trailer that I take on dusty dirt roads. It has a conventional RV refrigerator and the coil compartment is getting heavily loaded with dirt. Here is a pic:

IMG_4803.jpg

The upper opening is not an issue, but the lower one is in the dust plume and I need to figure out a way to minimize dirt entry. Some options:

1 - Put my frozen stuff in my ARB fridge in the truck. Put re-freezeable packs in the trailer freezer. On dirt roads, put the icepacks in the main compartment. Shut off the fridge completely. Cover the outside vents with solid covers. I need to figure out how to make covers, how to attach them to the oiutside of the fiberglass shell so it looks OK, and maybe see some pics and links for materials.

2 - Install AirTabs (vortex generators) along the front of the cabin door opening and the door itself down low. I have been talking with AirTab customer service and they are not very hopeful... but they are convinced they will help significantly with the dirt in back. ... Airtab

3 - Pull the ammonia fridge entirely out and install a built in 12vdc unit. I don't know how much these cost, how they vent, their running amp draw, can someone please explain where the waste heat goes? Into the cabin? Would this allow me to completely block these two exterior openings?

My trailer has 360 watts of solar and a built in DC fridge would not be a large burden, but I would rather not go to the expense if another option would work. When not on dirt roads, I have no issues with the RV unit,

IMG_4750.jpg

Currently I just let that section get loaded with dirt and blow it out with my gas leaf blower, but I don't think that can be very good for the internal parts....

BTW, I have installed a Stone Stomper (and chassis skirts), and I am floored at how well it works to keep dust, and also road spray, below the trailer frame. The back of the 200 stays very clean and dry, as does the A frame and the front face of the trailer. I now longer worry about destroying the gelcoat. The back of the trailer is a whole 'nother story, and the darned fridge compartment. I think the dust cloud exits from under the Stone Stomper just forward of the fridge, and it is just getting swallowed there.

IMG_4081.jpg

Any helpful comments would be GREATLY appreciated! BTW I will be staying at NW Overland Rally in Plain WA, in late June, for at least two nights, and I would be delighted to show my trailer to anyone who is interested. It is a sweetheart.

Thanks.

John Davies
Spokane WA
 

Scoutn79

Adventurer
How about paper air filter of some size. Or get the paper filter and pull it apart to get to the paper only and adapt it to the door?
Maybe a old tee shirt or ladies stockings?
What ever you do it will restrict airflow to some degree and I have no idea how it will affect your fridge operation.

Darrell
 

thebigblue

Adventurer
Get a filter for a home AC-unit or a HVAC unit, they come in flat panel and bag types, get the flat ones, something like this ie.:

s4_500x500_2.jpg


they come in 600x600 mm. and can be cut with a knive or a scissors ..
 

java

Expedition Leader
Im in the tear it out and replace with a 12V unit mindset. No worries about it ever again that way.

Covers appear to be flat, alu block off plates should be easy to make. My 12V fridge has a computer fan basically on the coils, it needed ~7 sq in of venting (to the inside of the camper) IIRC.
 

Coachgeo

Explorer
add positive pressure...... put some cpu fans orr?? that blow OUT thru the vents. Switch them on when hitting dusty roads. NO clue if this will work...... just an idea
 

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