Abstract: An air purification device and a method of estimating air filter lifetime are disclosed. The method of estimating air filter lifetime includes steps of: detecting, by an air quality sensing module, an air quality of an airflow before the airflow is filtered by a filter module to generate an air quality sensing value correspondingly; calculating consumption values of the filter module according to the air quality sensing value by a computation module; continuously calculating and updating an estimated lifetime value of the filter module by using the consumption values based on a frequency by the computation module; and when the estimated lifetime value of the filter module is not greater than a threshold, generating a notification command of changing the filter module.

Abstract: A filter structure includes a base and a filter. The base is provided with an aperture and multiple second slopes around the aperture. The filter is connected to the base and slidable relative to the base. The filter has a first sliding block and multiple second sliding blocks. The first sliding block passes through the aperture. Each second sliding block abuts against each second slope and is slidable along each second slope. Therefore, the gap between the main body and the filter may be reduced to increase the filtering efficiency of the air purifier and the filter structure.

Abstract: An automatic guiding method for a self-propelled apparatus (10) is provided. The self-propelled apparatus (10) turns and irradiates when a signal light emitted by a charging dock (20) is sensed by a flank sensor (103), and changes its turn direction when another different signal light from the charging dock (20) is sensed by a forward sensor (102). The charging dock (20) switches to emit another signal light different from the signal light currently emitted when each time is triggered by the signal light emitted by the self-propelled apparatus (10). Repeatedly execute the above actions and make the self-propelled apparatus approach the light-emitting unit (202) until the self-propelled apparatus (10) reaches a charging position. It can accurately guide the self-propelled apparatus (10) to the charging position by arranging only two sensors on the self-propelled apparatus.

Abstract: An airflow-generating device which can adjust an air chamber volume and a method applied thereto are provided. The device has a volume-adjustable air chamber and an airflow-generating unit. The volume-adjustable air chamber has an inlet structure, an outlet structure, and an adjustment unit. A deflector structure for adjusting pressure or direction of airflow is arranged in the outlet structure, and an air chamber space is formed between the inlet structure and the outlet structure. The adjustment unit is used to adjust an inlet-outlet distance between the inlet structure and the outlet structure for adjusting the volume of the air chamber. The airflow-generating unit is arranged in the volume-adjustable air chamber and used to generate the airflow introduced from the inlet structure into the air chamber space and exhausted from the outlet structure. The present disclosed example can increase the intensity or reduce the noise of the airflow.

Abstract: An automatic guiding method for a self-propelled apparatus (10) is provided. The self-propelled apparatus (10) turns and irradiates when a signal light emitted by a charging dock (20) is sensed by a flank sensor (103), and changes its turn direction when another different signal light from the charging dock (20) is sensed by a forward sensor (102). The charging dock (20) switches to emit another signal light different from the signal light currently emitted when each time is triggered by the signal light emitted by the self-propelled apparatus (10). Repeatedly execute the above actions and make the self-propelled apparatus approach the light-emitting unit (202) until the self-propelled apparatus (10) reaches a charging position. It can accurately guide the self-propelled apparatus (10) to the charging position by arranging only two sensors on the self-propelled apparatus.

Abstract: A method of automatically following human for purifying air nearby is applied to a self-propelled air-purifying apparatus (1). The self-propelled air-purifying apparatus (1) moves by itself and purifies the ambient air by operating air-purifying module during moving. When detecting a human, the self-propelled air-purifying apparatus automatically follows the human and purifies the ambient air around the human by operating the air-purifying module during the following. The present disclosed example can effectively improve the air quality around the human.

Abstract: A cleaning roller and a dust removal apparatus equipped with the same, the roller includes a roller member and a pivotal axle portion arranged inside the roller member. The roller member is of a cylindrical shape and includes a hollow space formed therein. A brush covers an outer surface of the roller member, and the pivotal axle portion is arranged inside the hollow space. The roller member is made of a soft material to allow the roller member to be compressed due to an external force exerted thereon and to generate a deformation together with the brush. Accordingly, tangled hair on the brush can be removed easily through the deformation of the soft material, thereby achieving the objective of cleaning.

Abstract: A drive control device for a brushless motor includes a full-wave rectifying-filtering circuit, a voltage regulating circuit, a drive control circuit and a protection circuit. A combination of the rectifying-filtering and voltage regulating circuit provides both the motor coil and the drive control circuit capable of operating at a normal working status to ensure the brushless motor with safe and reliable operation. Therefore, the brushless motor does not need a bulk and complex transformer for voltage drop, which may reduce the reliability of the operation.