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.

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.

In various embodiments, a hair treatment device is provided. The hair treatment device can have a device body, at least one sensor arranged in or on the device body for detecting a hair condition parameter, and an electronic circuit device arranged in or on the device body. The electronic circuit device can be coupled to the at least one sensor for receiving the detected hair condition parameter, and the electronic circuit device can be configured, based on the received detected hair condition parameter, to control at least one hair treatment parameter and/or to dose at least one hair treatment agent and/or to provide a hair treatment recommendation.

In various embodiments, a hair treatment device is provided. The hair treatment device can have a device body, at least one sensor arranged in or on the device body for detecting a hair condition parameter, and an electronic circuit device arranged in or on the device body. The electronic circuit device can be coupled to the at least one sensor for receiving the detected hair condition parameter, and the electronic circuit device can be configured, based on the received detected hair condition parameter, to control at least one hair treatment parameter and/or to dose at least one hair treatment agent and/or to provide a hair treatment recommendation.

A multiple channel diffuser system is disclosed that is designed to conform to the scalp of a user. The system includes a multiple channel diffuser with a first chamber and first diffuser channels. Each first diffuser channel has a proximal portion with a channel inlet and a distal portion with one or more channel outlets. The system also includes a fan, a power source connected to the fan's motor, a switch connected to the power source, a hose with a first and second end, and a housing that retains the power source, fan, and switch. The housing has an inlet opening where the first end of the hose is connected, allowing air from the fan to be discharged into the first chamber of the multiple channel diffuser. The one or more first diffuser channels then distribute the air to at least a portion of the user's scalp.

A multiple channel diffuser system is disclosed that is designed to conform to the scalp of a user. The system includes a multiple channel diffuser with a first chamber and first diffuser channels. Each first diffuser channel has a proximal portion with a channel inlet and a distal portion with one or more channel outlets. The system also includes a fan, a power source connected to the fan's motor, a switch connected to the power source, a hose with a first and second end, and a housing that retains the power source, fan, and switch. The housing has an inlet opening where the first end of the hose is connected, allowing air from the fan to be discharged into the first chamber of the multiple channel diffuser. The one or more first diffuser channels then distribute the air to at least a portion of the user's scalp.

A touch-screen hairdryer includes a touch screen and a control circuit, the touch screen is connected with the control circuit and arranged for receiving a touch signal from a user and then transmitting it to the control circuit, and the control circuit includes a wind speed adjusting circuit and a power adjusting circuit which are silicon controlled circuits arranged for adjusting wind speed and power according to the touch signal respectively. In comparison with the prior art, since the wind speed or power is adjusted by the silicon controlled rectifiers according to the touch signals inputted, thus a higher safety is obtained, and moreover the service life of the silicon controlled rectifiers is longer than the mechanical switch significantly.

A touch-screen hairdryer includes a touch screen and a control circuit, the touch screen is connected with the control circuit and arranged for receiving a touch signal from a user and then transmitting it to the control circuit, and the control circuit includes a wind speed adjusting circuit and a power adjusting circuit which are silicon controlled circuits arranged for adjusting wind speed and power according to the touch signal respectively. In comparison with the prior art, since the wind speed or power is adjusted by the silicon controlled rectifiers according to the touch signals inputted, thus a higher safety is obtained, and moreover the service life of the silicon controlled rectifiers is longer than the mechanical switch significantly.

An air flow regulating device includes a housing, an air supply unit and a circuit board which are arranged inside the housing. The air supply unit includes an impeller and a single-phase permanent magnet brushless motor configured to drive the impeller. The single-phase permanent magnet brushless motor includes a stator and a rotor which can rotate relative to the stator. The stator includes a stator core and a single-phase winding wound around the stator core. The rotor includes a shaft and a permanent magnet fixed to the shaft. Numbers of magnetic poles of the stator and the rotor are the same and not greater than six. An outer diameter of the stator core is less than 35 mm and/or an axial thickness of the stator core is between 10 mm and 20 mm.

A hair dryer includes a housing, and a heating unit, an air supply unit and a circuit board which are arranged inside the housing. The air supply unit includes an impeller and a single-phase direct current brushless motor for driving the impeller. The single-phase direct current brushless motor includes a stator and a rotor which is rotatable relative to the stator. The stator includes a stator core and a single-phase winding wound on the stator core. The rotor includes a shaft and a permanent magnet fixed on the shaft. A power supply terminal for connecting an external power supply and an inverter for providing an alternating current to the single-phase winding are arranged on the circuit board. An input voltage of the inverter is no lower than an input voltage of the power supply terminal.