本实用新型采用了溶液分次释放，冷效应再次进行的办法，延长了冰袋的保冷时间。
The utility model adopts a method that the solution is released for many times and then the cold effect is conducted again to extend the heat insulating time of the ice bag.
本实用新型采用了溶液分次释放，冷效应再次进行的办法，延长了冰袋的保冷时间。
The utility model adopts a method that the solution is released for many times and then the cold effect is conducted again to extend the heat insulating time of the ice bag.
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