Abstract: A blower device for use in an air purifier is disclosed. The blower device includes a first fan and a second fan which have a same air blowing direction and are arranged sequentially in the air blowing direction at an interval. The first fan and the second fan are mounted coaxially and driven synchronously by a motor.

Abstract: A method and a device are provided for controlling a rotation angle of a swinging head of a fan. The method may be applied in a fan adopting a brushless motor. An angle feedback device is arranged on the swinging head, and the swinging head is driven by the brushless motor to rotate. The device may acquire a parameter outputted by the angle feedback device, where the parameter varies with rotation of the swinging head. The device may calculate a current rotation angle of the swinging head according to the parameter outputted by the angle feedback device and a preset correspondence relationship between parameters and angles. The device may control the swinging head to rotate according to the current rotation angle of the swinging head and a preset target rotation angle.

Abstract: The present disclosure relates to methods and devices for identifying an action. In some embodiments, a method for identifying an action includes: recording vibration trajectory information, wherein the vibration trajectory information corresponds to vibration of at least a portion of an intelligent device from a start of a vibration event to stabilization of the vibration event; determining whether the vibration is a damping vibration based on the vibration trajectory information; and in response to determining that the vibration is a damping vibration, determining that the vibration is caused by a user's trigger action, or in response to determining that the vibration is not a damping vibration, determining that the vibration is not caused by the user's trigger action.

Abstract: The present disclosure relates to a fan and a method and device for controlling the fan. The method includes controlling, via a support rod control device, a swinging motion of the swingable support rod, wherein the support rod control device is provided between the swingable support rod and the fan base; determining, when the swingable support rod is swinging, a current swing angle of the swingable support rod; determining a current distance between the fan and a user; determining, based on the current distance and the current swing angle, an axial rotation angle of the fan head; and rotating the fan head based on the axial rotation angle to direct air at the user.

Abstract: Methods, apparatuses, and storage mediums are provided for detecting water shortage for a humidifier. The method includes: obtaining a water level parameter of a water tank; determining a water level state of the water tank according to the water level parameter. When the water level state of the water tank is a water shortage state, energizing a valve connected to a water box so that water can be added to the water tank through the valve. A number of times of energizing the valve is recorded. When the number of times of energizing the valve exceeds a first preset number of times as well as when the water level state of the water tank determined every time after energization of the valve is the water shortage state, confirming that the water box is short of water.

Abstract: A method and an apparatus are provided for calibrating a particulate matter measurement value. The method includes: when a current particulate matter measurement value is obtained, obtaining a current temperature-humidity parameter; obtaining a particulate matter measurement deviation value corresponding to the current temperature-humidity parameter from pre-stored particulate matter measurement deviation values under various temperature-humidity parameters according to the current temperature-humidity parameter; and calibrating the current particulate matter measurement value according to the particulate matter measurement deviation value corresponding to the current temperature-humidity parameter.

Abstract: The present disclosure relates to a method and device for adjusting operation data of an air-out device.