公开(公告)号：US20250031823A1

公开(公告)日：2025-01-30

申请号：US18716529

申请日：2022-10-13

Applicant: Dyson Technology Limited

Inventor： Li NIU ,  Zhiyang PAN ,  Xinyi LI

IPC: A45D1/28 ,  A45D20/30

Abstract: A haircare appliance comprising drive circuitry, a controller in communication with the drive circuitry for controlling a drive current output by the drive circuitry, and a temperature sensor for supplying a temperature signal to the controller. The temperature signal is indicative of a temperature of an electronic circuit within the haircare appliance. The controller is configured to estimate an ambient temperature at least partly based on the temperature signal, and to prevent the drive circuitry from outputting the drive current when the estimated ambient temperature is lower than an ambient temperature threshold.

公开(公告)号：US20240206612A1

公开(公告)日：2024-06-27

申请号：US18288567

申请日：2022-04-19

Applicant: Dyson Technology Limited

Inventor： Yuen Kee LEOW ,  Li NIU ,  Stephen John WOOLAGHAN ,  Kishan Mayur AMRATIA ,  Stephen BERRY ,  Michael James WAITE ,  Andrew John Dennis SPILLMAN ,  Neil WAREHAM ,  Robert STREETER

IPC: A45D20/12 ,  H03K17/56

CPC classification number: A45D20/12 ,  H03K17/56

Abstract: A haircare device includes at least one power semiconductor switch coupled to drive, in use, a heater. A temperature sensor disposed for sensing a temperature of the at least one power semiconductor switch and outputting a temperature signal indicative of the sensed temperature. A controller is configured to determine whether the temperature signal is indicative of a temperature of the one or more power semiconductor switch exceeding a threshold. When the temperature signal is indicative of the temperature of the one or more power semiconductor switch exceeding the threshold, a power output of the at least one power semiconductor switch is turned off or reduced.

公开(公告)号：US20210251362A1

公开(公告)日：2021-08-19

申请号：US17274661

申请日：2019-09-05

Applicant: Dyson Technology Limited

Inventor： Siew Ling LOKE ,  Li NIU

IPC: A45D20/08

Abstract: Disclosed herein is a method of controlling a haircare appliance including a heater. The method includes measuring a temperature of output air of the haircare appliance to obtain a measured output air temperature. The method includes comparing the measured output air temperature to a desired output air temperature. The method includes determining a desired heater temperature based on the comparison of the measured output air temperature to the desired output air temperature. The method includes predicting a predicted heater temperature. The method includes comparing the predicted heater temperature to the desired heater temperature. The method includes outputting a control signal based on the comparison of the predicted heater temperature to the desired heater temperature.