The invention provides a pneumatic circulation
drying system of a soft
drying machine. The
system comprises a cloth inlet, a first cloth storage box, a cloth outlet, a second cloth storage box, a cloth groove air
flue, a main fan and an auxiliary fan, the cloth groove air
flue is connected with the first cloth storage box and the second cloth storage box, the main fan and the auxiliary fan are communicated with the cloth groove air
flue, the main fan is connected with at least one main air duct, the main air duct is connected with a main air duct
reversing valve plate, the main air duct
reversing valve plate is connected with a left
branch main fan and a right
branch main fan of the main fan, the left
branch main fan and the right branch main fan are connected with the cloth groove air flue; the auxiliary fan is connected with at least one auxiliary air duct, the auxiliary air duct is connected with an auxiliary air duct
reversing valve plate, the auxiliary air duct reversing valve plate is connected with a left branch auxiliary fan and the right branch auxiliary fan of the auxiliary fan, the left branch auxiliary fan and the right branch auxiliary fan are connected with the clothgroove air flue. According to the pneumatic circulation
drying system, the reversible air duct structure is arranged, so that the fabric is supported by the upper hot air flow and the lower hot air inthe air duct for left and right
reciprocating motion and is beating, so that the fabric can obtain a soft hand feeling, meanwhile, the fabric can obtain an ideal pre-shrinking effect in a tension-
free state and a high-temperature state, in addition, due to the fact that the fabric does not rub with any object, the pilling is avoided.