公开(公告)号：US20240237800A1

公开(公告)日：2024-07-18

申请号：US18288671

申请日：2022-04-19

Applicant: Dyson Technology Limited

Inventor： Yuen Kee LEOW ,  Weifu YU ,  Clement Jian Ming TAN ,  Xinyi LI ,  Gaudencio III Racho TEVES ,  Stephen John WOOLAGHAN ,  Kishan Mayur AMRATIA ,  Jack Michael THOMPSON ,  Brian William WEEKS ,  Teng Lee KHOO

IPC: A45D20/12

CPC classification number: A45D20/12

Abstract: A haircare appliance includes a pressure sensor for generating a pressure signal indicative of air pressure within an airflow path, the pressure sensor being upstream of an airflow generator. A controller is configured to estimate, based at least partly on the pressure signal, a blockage factor corresponding to an amount by which the airflow path is blocked. When the estimated blockage factor exceeds a blockage warning threshold, a warning indicative of a partial blockage is output. When the estimated blockage factor exceeds a critical threshold, the critical threshold being higher than the blockage warning threshold, a power output of at least one component of the haircare appliance is turned off or reduced.

公开(公告)号：US20230246434A1

公开(公告)日：2023-08-03

申请号：US18008218

申请日：2021-04-22

Applicant: Dyson Technology Limited

Inventor： Yuen Kee LEOW ,  Weifu YU ,  Shiyi CHEN ,  Aaron Qingwei CAI ,  Kai WANG

IPC: H02H5/04

CPC classification number: H02H5/04

Abstract: A protection circuit for an electric appliance that is configured to control power supply to an associated electrical component of the appliance such as a heating device, lamp or motor in the event that unsafe conditions are detected. The protection circuit includes a first comparator module configured to compare an operating parameter input signal to a threshold value and to output a first control signal to a first switching circuit configured to control power flow to the associated electrical component. The first comparator module is configured to receive an enable/disable signal from a first state-change latching device, which is responsive to a state change of the first control signal from the first comparator module, in response to which the state-change latching device changes the enable/disable signal from an enable state to a disable state thereby to set the first control signal into an off state.