Air duct system applied to hair straightening device

An air duct system applied to a hair straightening device, comprising a main body (10), wherein the main body (10) has two hair straightening walls (20) that cooperate with each other at intervals, a hair straightening space (21) that is used to straighten or dry hair is formed between the two hair straightening walls (20), a main flow channel (11) and two branch flow channels (12) that are connected to the main flow channel (11) are disposed inside the main body (10), the two branch flow channels (12) are disposed along length directions of the two hair straightening walls (20), a strip-shaped oblique air outlet (22) is disposed on the hair straightening wall (20) along a length direction of the hair straightening wall (20), and the hair straightening space (21) is connected to the branch flow channel (12) by using the oblique air outlet (22);

• an air inlet (13) connected to the main flow channel (11) is disposed on the air inlet main body (10), so that the main body (10) is able to form a directional fluid that enters from the air inlet (13) and passes through the main flow channel (11) and the branch flow channel (12), and then blows from the oblique air outlet (22) to the hair straightening space (21);
• a wavy structure (23) corresponding to the oblique air outlet (22) is formed on a wall surface on one side that is of the hair straightening wall (20) and that corresponds to the branch flow channel (12), and the wavy structure (23) and the oblique air outlet (22) are in an arc-plane transition structure;
• and a cross-sectional area of the branch flow channel (12) from one end connected to the main flow channel (11) to a tail end of the branch flow channel (12) gradually decreases, and a longitudinal dimension of the wavy structure (23) gradually decreases as the cross-sectional area of the branch flow channel (12) gradually decreases.