barge1914
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Connecting fridge fan
- Thread starter barge1914
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barge1914
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Thanks. Sadly the delivery on the last item is not until late April/May. too late for us.
barge1914
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fridge fan
Hi
Is this the same unit you used.. 12V Digital LED Display Temperature Controller Thermostat w/ Sensor MH1210A ://uk.suntekstore.com/goods.php?id=14009051&utm_source=gbuk&utm_medium=paid
I note it says voltage 12v + or - 10%. How is yours managing, as charging voltage exceeds this at 14.4V. Have you added something to limit voltage?
Hi
Is this the same unit you used.. 12V Digital LED Display Temperature Controller Thermostat w/ Sensor MH1210A ://uk.suntekstore.com/goods.php?id=14009051&utm_source=gbuk&utm_medium=paid
I note it says voltage 12v + or - 10%. How is yours managing, as charging voltage exceeds this at 14.4V. Have you added something to limit voltage?
torwood
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Yes - no issues so far, fitted it last year.
gypo
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QFour
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I used an Audrino Micro Computer to switch mine on and off. It has a control panel which shows the temp in the area behind the fridge and shows if the fans are on high or low speed or off. I have three fans connected and a temp sensor. Nothing happens until it gets to 30 degrees. Then the fans switch on to low speed. If the temp still rises and gets beyond 38 degrees then the fans switch on to high speed. To stop the fans oscillating on and off they switch on for 4 minutes before the program checks the temp again.
First trial in Spain last year showed that the fridge temp can reach 36 degrees and the fans on low speed can drop the temp down to 30 degrees. On really warm days or if the fridge vents are in the sun then you can get 40 degrees behind the fridge. Fans on high would lower the temp but it struggled to get down to 30 degrees.
First trial in Spain last year showed that the fridge temp can reach 36 degrees and the fans on low speed can drop the temp down to 30 degrees. On really warm days or if the fridge vents are in the sun then you can get 40 degrees behind the fridge. Fans on high would lower the temp but it struggled to get down to 30 degrees.
gypo
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By connecting to the 12v supply to the fridge doesn't this mean that the fan will only get power when the engine is running and powering the 12v supply to the fridge of and not all the time ie when on gas from eg?
Thanks
G
Channa
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No there is a permanent 12 v feed for the igniter, separate to how you are thinking
Channa
gypo
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I’ve installed my fan now, I’m just wondering where is the best place to put the temperature sensor? I find if I put it just in front it between the fins and the fans when you switch it on what happens is the fans draw the warm air over it from the fridge and send the temp reading up so you are not really able to balance it.
Thankg
Thankg
torwood
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I clipped mine to the radiator fins, conduction beats convection!
gypo
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This is what I’ve done, however putting it between the fins and fans doesn’t exactly work properly if you are using a temperature type controller like the ones mentioned earlier in this thread because when you fit the sensor where you say the fans pull the warm air from the fins over it sending the readings up. However fitting it like torwood has said now works!
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Late onto this thread as usual.
First up the fan should be placed so that it blows cold air sucked in from the outside - so close to the bottom vent if possible but above the bottom baffle.
Second, the fan air should be blown over the cooling fins and out of the top vent. Sucking warm air is not as effective as blowing cold air!!!
Third, the installation should be in accordance with the fridge designers requirements - not the vehicle builder's cheapest method. There should be two baffles on the back of the fridge that creates a chimney effect. The lower baffle should direct cold air to the lower part of the fridge and ensuring that the "chimney" draws. The top baffle should direct heat out of the top vent.
If you goto https://caravanandmotorhomebooks.com/make-caravan-fridges-work-as-claimed/ you can find detailed information on fitting, fans and baffles.
First up the fan should be placed so that it blows cold air sucked in from the outside - so close to the bottom vent if possible but above the bottom baffle.
Second, the fan air should be blown over the cooling fins and out of the top vent. Sucking warm air is not as effective as blowing cold air!!!
Third, the installation should be in accordance with the fridge designers requirements - not the vehicle builder's cheapest method. There should be two baffles on the back of the fridge that creates a chimney effect. The lower baffle should direct cold air to the lower part of the fridge and ensuring that the "chimney" draws. The top baffle should direct heat out of the top vent.
If you goto https://caravanandmotorhomebooks.com/make-caravan-fridges-work-as-claimed/ you can find detailed information on fitting, fans and baffles.