Patent ID: 11963651
Assignee: BEIJING SHUNZAO TECHNOLOGY CO., LTD.
Field: Furniture, games (Other fields)
Classification: CPC A  G | IPC A  G

Claim 12:
13. A noise reduction air duct device for an autonomous cleaning device, comprising:
an upper housing;
a lower housing; and
a support noise reduction structure,
wherein the autonomous cleaning device comprises a body and a motor mounted on the body, the noise reduction air duct device is configured to be mounted on the body; and
wherein the support noise reduction structure is made of an elastic material, the lower housing and the upper housing enclose to form an air duct, the air duct comprises an air inlet at a position corresponding to the motor, and the air duct comprises an air outlet at a side of the air duct away from the air inlet; and the support noise reduction structure comprises a first end fixed on the lower housing, and a second end abutting against a lower surface of the upper housing,
wherein along an airflow direction in the air duct, the air duct is divided into an upstream air duct and a downstream air duct;
a plurality of support noise reduction structures are mounted in the upstream air duct, the downstream air duct comprises an airflow buffer and an exhaust port, a first end of the airflow buffer is connected to the upstream air duct, a second end of the airflow buffer is connected to a first end of the exhaust port, and a second end of the exhaust port is located at a position of the air outlet; and
wherein the lower housing at the airflow buffer comprises a first inclined portion and a second inclined portion disposed successively along an airflow direction, the first inclined portion and the second inclined portion forms a smooth transition therebetween, and a side of the first inclined portion away from the second inclined portion is connected with the upstream air duct; an angle between the first inclined portion and the upper housing is greater than an angle between the second inclined portion and the upper housing.