The task was the following: to bring the frost from the dacha to the city, the road ~ 5-6 hours. I filled the container to the eyeballs, besides adding 4 jokes of cold accumulators of 500 g each. As a result, everything arrived, melted just a little, uncritically. By the end of the trip, the thermometer showed +2 C inside. The container was in the cabin, without connection. That is, the external temperature is ~ +20 C. I think that it makes no sense to connect it if all the products are already frozen. Otherwise, warm air is forced inside. So, if there is no task to cool warm products, then there is no point in connecting. And for my task, a regular container without fans would do.
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