Box-packaged blasting device for changing temperature of foodstuff

The present invention relates to a box-packed blowing device that is used for changing the temperature of the food, and aims at providing a food temperature-changing device that has low cost and less electric power consumption, and adopts the technical proposal that a blower is arranged inside a closed box; the top surface or the side surface of the box is provided with a sealing door that can be opened; the blower comprises a ventilating pipe and a small electric fan; the small electric fan is arranged inside the ventilating pipe; the blower can also be provided with a resistance wire that can be electrified and a timer, so that a device that can rapidly change the temperature of the food in the way of blowing the food is formed. The device can also heat the temperature by blowing the hot air to the food, and can also cool down the hot team or the soup and the dishes, which are just cooked by blowing the room-temperature wind, so as to drink the hot beverage or to eat the food as soon as possible. The wind that is blown by the box-packed blower is the cycling wind inside the box, so that the wind inside the box is repeatedly heated, thereby saving the energy, and can purify the air that is blown out, and guaranteeing the cleanliness of the food.