I want to operate a small mixer in the freezer, for churning ice cream. I can close the door over the power cord, but the door seal isn't flexible enough to enclose the power cord, so it creates a crack.
My idea is to make a small hole in the seal, for the power cord. If it is a tight fit, the cold loss during mixer operation will be minimal. But I don't plan to keep the mixer there permanently, so I'll have to seal the hole somehow.
I think that an earplug will be the best seal. It is easily removed, and once inserted, it will expand to fit the hole perfectly. The foam should be a fairly good isolator.
While it looks to me that this will work, it sounds slightly lunatic from some angles. Not being an experienced DIYer, and afraid to end up with a freezer which is constantly heated through a badly sealed hole, I want to ask you: Do you think this will work? Are there drawbacks I am missing? (Beside the freezer spending extra energy to cool a working motor, I think I can live with that). And are there better ways to do this?
update in response to ppumpkin
This is a standalone freezer, not a compartment in a fridge. It has no lightbulb or thermostat on the inside.
The mixer will only be put in the freezer for ice cream making, so it won't be there most of the time.
I have already thought of putting a socket in the freezer, caulking the hole for the power cord coming from outside. But while I can get wet-room rated extensions, the cords of premade extensions are too thick to lead through the seal. So I'll have to make the extension myself, which is much less secure than connecting the mixer to a socket outside.
The other idea was to build my own "mixer" from a 6 V DC motor and operate it from a li-ion battery. But not only is it lots of work, li-ion batteries at -18°C aren't a good idea. So I still think that connecting the mixer outside is better.
Best Answer
Put the cord/hole in the top of the door, and it really won't matter:
The cold air is heavier than the air around it. So your freezer full of cold air is like a bucket of water: the cold air is trying to flow out only where gravity will let it. Other than the stirring of air causing the mingling of warm and cold air, a freezer doesn't need a top at all. Ever wondered how the open-top freezers at the grocery store stay frozen? They're a big bucket, and the cold air is trapped by gravity.
So take advantage of that: Put your cord inlet at the top of your freezer, and don't worry about sealing it. The mixture/transfer of air at the cord inlet point will be negligible.