Is found in the world's first refrigerator earlier in the spring and Autumn period, the slaves on winter ice storage, for the aristocratic summer drinking. Simply put, the ancient "icebox" is a box, ice, and then place the food in the middle of the ice, in order to achieve preservation role. However, there was "the fridge" simple and single function, unlike now, refrigerators and even can become a killer in the thrillers of the container.