A pivoting and swiveling floor treatment appliance includes a lock-prevention member that prevents a body from becoming pivotally locked in a forward/backward direction when a portion of the body is in a swiveled position. The lock-prevention member may move relative to an appliance head and to a portion of the body that swivels. In some embodiments, components of the lock-prevention member contribute to locking the swivel of the body when the body is pivotally locked.

An upright vacuum cleaner (1) includes a brushroll assembly (100) having a brushroll casing (12) and a brushroll (11); a motor assembly (200) having a motor housing (21) and a motor (22); a body assembly (300) having a body (31) and a bridging member (32), in which the bridging member (32) is pivotally connected to the motor housing (21) to make the body (31) rotatable between an upright position and an oblique position; and an elastic assembly (4) provided between the brushroll casing (12) and the bridging member (32), and configured to be pressed downward against the brushroll casing (12) by the bridging member (32) when the body (31) rotates from the upright position to the oblique position.

A cyclonic separating device (900) for an upright vacuum cleaner and an upright vacuum cleaner (1) with the same are disclosed. The cyclonic separating device (900) includes a dirt cup (37), a filter (92) and a cyclonic cone assembly (93). The filter (92) is disposed in the dirt cup (37) and includes a filter inlet (92a) and a filter outlet (92b) communicating between the filter inlet (92a) and an air outlet (373). The cyclonic cone assembly (93) includes a cyclone (931) and a cyclonic guide (932), in which a first end of the cyclone (931) is communicated with an air inlet (372), and the cyclonic guide (932) is fitted in a second end of the cyclone (931) and is detachably fitted over the filter (92) to spirally guide dirty air introduced into the cyclone (931) from the air inlet (372) to the filter inlet (92a).

An upright vacuum cleaner (1) includes: a brushroll assembly (100) including a brushroll casing (12) and a brushroll (11), the brushroll casing (12) defining a brushroll air-suction channel (122) therein; a motor assembly (200) including a motor housing (21) and a motor (22), the motor housing (21) having an air exhaust hole (213), a dirty air outlet (211) and a clean air inlet (212) and defining a motor air-suction channel (216) and a motor air-exhaust channel; and a body assembly (300) including a body (31) and a dirt cup (37) mounted to the body (31), the dirt cup (37) having a separating chamber (371) communicating with the dirty air outlet (211) and the clean air inlet (212) respectively.

The present application provides a smart floor cleaning device and a control method thereof. The smart floor cleaning device includes a body, a chassis, a processor, a negative pressure source, and a sewage tank on the body. The negative pressure source is connected to the sewage tank and applies a negative pressure to draw sewage during cleaning into the sewage tank. The smart floor cleaning device further includes an angle detection device on the body and/or the chassis. The processor is electrically connected to the angle detection device and obtains a rotation angle of the body around the first axis and/or the second axis based on a detection signal from the angle detection device. The first axis and second axis are perpendicular to each other. The processor is electrically connected to the negative pressure source and controls the output power of the negative pressure source based on the rotation angle.

A vacuum cleaning system comprising a vacuum cleaner having a vacuum motor, a dirt bin, a primary separation system, a membrane filter, and an air valve arrangement configured to control air flow through at least the membrane filter. The vacuum cleaner is configured to be operable in a surface cleaning mode of operation and a self-cleaning mode of operation. In the surface cleaning mode of operation, the vacuum cleaner is configured such that the vacuum motor draws dirty air from a dirty-air inlet through the dirt bin, the primary separation system and the membrane filter in a first airflow direction, and, in the self-cleaning mode of operation, the vacuum cleaner is configured to permit air to flow from the air valve arrangement through the membrane filter in a second airflow direction to clean dirt from the membrane filter. Usefully, therefore, airflow can be routed through the vacuum cleaner in a second or reverse direction to clean the caked on dirt from the membrane filter. The membrane filter may be used as a pre-motor filter positioned upstream from the vacuum motor, or as a post-motor filter, positioned downstream from the vacuum motor, when considered in an airflow direction during a surface cleaning mode of operation.