| abstract |
The invention discloses a method for pulsating pressure difference flash drying of fruits and vegetables. The invention comprises the following steps: (1) placing the pretreated fruits and vegetables in a heated drying bin, and then releasing the pressure on the drying bin; (2) pressurizing the drying bin and maintaining the pressure; (3) (4) heat up the drying bin; (5) repeat steps (2)-step (4) until the mass moisture content of the fruits and vegetables is 10-25%; the drying of the fruits and vegetables can be achieved through vacuum drying . The invention has the following advantages: the high-temperature and high-pressure moisture inside the fruit and vegetable material will undergo "explosive" violent gasification for many times, so that the moisture can quickly migrate to the outside of the material. Such repeated pulsating "flash evaporation" can realize rapid dehydration of materials, greatly shorten drying time, improve drying efficiency, and save costs; and increase the pores between the internal tissue structures of materials, so that the product has a unique crispy texture Taste and texture, and better preservation of nutrients. |