Good Sam Club Open Roads Forum: Tech Issues: Improving Fridge Cooling
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NRALIFR

Truck Camping Out West

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Posted: 05/26/20 12:37pm Link  |  Quote  |  Print  |  Notify Moderator

The RV fridges I’ve seen with a factory installed fan inside them has been at the very top, with the air blowing towards the fins. The one I’m thinking of was in a Norcold fridge, and it looked like a centrifugal fan laying flat against the top of the reefer compartment. It was inside a plenum box that directed the air across the width of the fins.

I made one for my fridge with a small 12v fan that was in my junk pile. I used it because it’s small, and it’s the right voltage. I tapped into the power going to the interior light, and it runs full time when the fridge is turned on.

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beemerphile1

Ohio

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Posted: 05/26/20 08:32pm Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:


...The Interior refer relies on Convection air to flow from the bottom of the refer box UP the back wall and THRU the Evap fins and that removes the heat as the fins are 10 degrees colder than the interior temp...


The part quoted doesn't sound quite right. I'm not being argumentative but cold air falls. Seems to me that cold air would go down the rear wall.


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pulpwood007

Hemphill, TX

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Posted: 05/27/20 09:32am Link  |  Quote  |  Print  |  Notify Moderator

NRALIFR wrote:

The RV fridges I’ve seen with a factory installed fan inside them has been at the very top, with the air blowing towards the fins. The one I’m thinking of was in a Norcold fridge, and it looked like a centrifugal fan laying flat against the top of the reefer compartment. It was inside a plenum box that directed the air across the width of the fins.

I made one for my fridge with a small 12v fan that was in my junk pile. I used it because it’s small, and it’s the right voltage. I tapped into the power going to the interior light, and it runs full time when the fridge is turned on.

[image]

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Since you are using the interior fridge light as a 12vdc power source I assume the light does not go off when the fridge door is closed?

NRALIFR

Truck Camping Out West

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Joined: 11/27/2005

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Posted: 05/27/20 11:23am Link  |  Quote  |  Print  |  Notify Moderator

No, the light still turns on and off. I tapped the power before it goes to the switch.

I wouldn’t want the light to stay on all the time.

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Dusty R

Charlotte Michigan 48813

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Posted: 05/27/20 11:36am Link  |  Quote  |  Print  |  Notify Moderator

beemerphile1 wrote:

dougrainer wrote:


...The Interior refer relies on Convection air to flow from the bottom of the refer box UP the back wall and THRU the Evap fins and that removes the heat as the fins are 10 degrees colder than the interior temp...


The part quoted doesn't sound quite right. I'm not being argumentative but cold air falls. Seems to me that cold air would go down the rear wall.


Cold air does fall, but when it's falling then there is warm air rising, on the other side.

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