The volume of air that a refrigerator cools is much smaller, and the air stays dry until the fridge door is opened if you don’t have open containers with water inside. A room can have the moisture replenished from a variety of sources. There is some condensation of water in a refrigerator. It might be channeled to evaporate outside on the warm compressor. In the freezer section, it stays on the pipes until defrosted.
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