US 12,137,784 B2
Amplification type hair dryer
Yiyang Chen, Dongguan (CN)
Assigned to Guangdong Wuye Technology Co., Ltd., Guangdong (CN)
Appl. No. 17/426,089
Filed by Guangdong Wuye Technology Co., Ltd., Dongguan (CN)
PCT Filed Dec. 18, 2020, PCT No. PCT/CN2020/137645
§ 371(c)(1), (2) Date Jul. 27, 2021,
PCT Pub. No. WO2021/196756, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 202010259406.7 (CN), filed on Apr. 3, 2020.
Prior Publication US 2022/0312925 A1, Oct. 6, 2022
Int. Cl. A45D 20/12 (2006.01)
CPC A45D 20/12 (2013.01) [A45D 2020/128 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An air amplification type hair dryer, comprising:
a handle having an upper end portion and a lower end portion opposite to the upper end portion, an air duct being form inside the handle, wherein the handle defines a longitudinal direction along the upper end portion and the lower end portion;
a main body housing;
an outer cylinder;
an inner cylinder;
a fan; and
a control circuit;
wherein the upper end portion of the handle is connected to the main body housing, the fan is installed in the air duct of the handle at the lower end portion of the handle, the outer cylinder and the inner cylinder are arranged in the main body housing, the outer cylinder and the inner cylinder each have a front opening for air outlet, the outer cylinder surrounds the inner cylinder and thus an annular cavity is formed between the outer cylinder and the inner cylinder, the annular cavity is connected to the air duct of the handle, an annular nozzle is formed at a front end portion of the annular cavity, and the control circuit is housed in a rear end portion of the main body housing;
wherein a transverse tunnel-shaped hole is formed in the lower end portion of the handle transversely relative to the longitudinal direction of the handle, the transverse tunnel-shaped hole is formed below the fan, and a peripheral wall of the transverse tunnel-shaped hole is of a grid shape;
wherein the fan is sleeved in a barrel, and the barrel has an air inlet section connected to the transverse tunnel-shaped hole, the air inlet section has a diameter smaller than a diameter of the barrel;
wherein a plurality of spray holes are formed circumferentially on the inner cylinder, the plurality of spray holes are inclined towards the front opening of the inner cylinder, and a section of the inner cylinder from the plurality of spray holes to the front opening of the inner cylinder is expanded funnel-shaped.