公开(公告)号：US20130272685A1

公开(公告)日：2013-10-17

申请号：US13856273

申请日：2013-04-03

Applicant: Dyson Technology Limited

Inventor： Yuen Kee LEOW ,  Jun Hong LEE ,  Ying Fang TAN ,  I Made Artha Yoga AJNYANA ,  John David WALLACE

IPC: F24H9/20

CPC classification number: F24H9/2071 ,  F04D27/001 ,  F04D27/004 ,  F04D27/008 ,  F05D2260/85 ,  F24H3/0411 ,  F24H9/1872

Abstract: Heating apparatus includes an air inlet, a plurality of air outlets, an impeller, a motor for rotating the impeller to draw air through the air inlet, a user interface for allowing a user to select a rotational speed of the motor from a user selectable range of values, and a plurality of heater assemblies each comprising at least one positive temperature coefficient (PTC) heating element for heating air passing from the air inlet to a respective air outlet. The magnitude of a current drawn by the heater assemblies is detected, and the rotational speed of the motor is controlled independently from the rotational speed selected by the user depending on a characteristic of the current drawn by the heater assemblies.

Abstract translation: 加热装置包括空气入口，多个空气出口，叶轮，用于使叶轮旋转以通过空气入口抽取空气的马达，用户界面，用于允许用户从用户可选择的范围中选择马达的转速 以及多个加热器组件，每个加热器组件包括至少一个正温度系数（PTC）加热元件，用于加热从空气入口到相应空气出口的空气。 检测由加热器组件引起的电流的大小，并且根据由加热器组件吸取的电流的特性，独立于用户选择的旋转速度来控制电动机的转速。

公开(公告)号：US20240215113A1

公开(公告)日：2024-06-27

申请号：US18288721

申请日：2022-04-19

Applicant: Dyson Technology Limited

Inventor： Yuen Kee LEOW ,  Zhiyang PAN ,  Kai WANG ,  Stephen John WOOLAGHAN ,  Kishan Mayur AMRATIA ,  Brian William WEEKS ,  Glen Raymond WARDLE ,  Adorjan GAVEL

IPC: H05B1/02 ,  H03K3/0233 ,  H03K3/356 ,  H03K3/3565 ,  H03K5/1536 ,  H03K5/24

CPC classification number: H05B1/0225 ,  H03K3/02337 ,  H03K3/356104 ,  H03K3/3565 ,  H03K5/1536 ,  H03K5/24 ,  H05B1/0252

Abstract: A method for generating a clock signal from an AC power supply signal includes receiving a reference signal at a first input of a comparator and receiving the AC power supply signal at a second input of the comparator. A clock signal is output by the comparator based on a comparison of the reference signal and the AC power supply signal, such that transitions of the clock signal take place while the reference signal is at a trigger voltage. Following each clock signal transition, the reference signal is changed from the trigger voltage to a hysteresis voltage that reduces a likelihood of the comparator outputting, immediately after each clock signal transition, a spurious transition of the clock signal due to noise on the AC power supply signal. The reference signal is then returned from the hysteresis voltage to the trigger voltage prior to return of the AC power supply signal to a level intended to cause a further clock signal transition at the output of the comparator.

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：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：US20230329413A1

公开(公告)日：2023-10-19

申请号：US18028232

申请日：2021-09-16

Applicant: Dyson Technology Limited

Inventor： Christopher James BOON ,  Edward Sebert Maurice SHELTON ,  Stephen Benjamin COURTNEY ,  Yuen Kee LEOW ,  Glenn Raymond WARDLE

IPC: A45D20/12 ,  H05B1/02

CPC classification number: A45D20/12 ,  H05B1/0244

Abstract: A haircare appliance has a heater housing and a heater assembly disposed in the heater housing. The haircare appliance has an airflow generator for generating an airflow through the heater housing, and the airflow generator is disposed in the heater housing. The haircare appliance has a circuitry housing remote from the heater housing, and airflow generator control circuitry is disposed in the circuitry housing. A wire extends from the circuitry housing to the heater housing, and the wire couples the airflow generator control circuitry to the airflow generator.

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.