By using a cold storage agent to store cold, the cold storage agent is placed in a water bag to cool the water, and the cold water is circulated in the water bag through a water pump to achieve a cooling effect;
Each cold storage agent can store cold for about 3 hours. If the cooling capacity is not enough, replace one and use 2 sets of cold storage agents alternately;
Cold storage agents can be recycled and stored in the freezer again when there is no cold sensation;
The cost is relatively low.
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