A vacuum cleaner includes a suction nozzle defining a nozzle inlet, a manual nozzle height adjustment assembly for adjusting the height of the nozzle inlet relative to a surface to be cleaned, and a bleed valve fluidly connected to a working air path of the vacuum cleaner to selectively open to reduce suction at the nozzle inlet. The bleed valve is incorporated with the nozzle height adjustment assembly such that movement of the nozzle height adjustment assembly between different height settings will automatically open or close the bleed valve.

A surface cleaning apparatus has a dirty air inlet and an air treatment member. The air treatment member includes a dirt collection region having an openable door. When an accessory is connected to the dirty air inlet, the openable door is inhibited from opening.

A surface cleaning head 100 for a surface cleaning apparatus includes a dirty air inlet 108, a dirty air outlet 112, and a dirty airflow path extending between the dirty air inlet 108 and the dirty air outlet 112. The surface cleaning head 100 also includes an automated valve assembly 116 operable to open and place the dirty airflow path in fluid communication with ambient pressure. The automated valve assembly 116 is adjustably opened based upon a suction level within the dirty airflow path.

A vacuum cleaner is provided, which includes a main body; a dust collection unit arranged in the main body to collect dusts from air that flows into the main body along an intake passage; and a suction unit arranged at a downstream that is lower than a location of the dust collection unit on the intake passage to provide a suction force, wherein the suction unit includes a suction force generator, an exhaust passage configured to switch a discharge direction of the air that has passed through the suction force generator at least twice, and a plurality of sound-absorbing members arranged on the exhaust passage to pass the air therethrough.

A vacuum cleaner includes a suction nozzle defining a nozzle inlet, a manual nozzle height adjustment assembly for adjusting the height of the nozzle inlet relative to a surface to be cleaned, and a bleed valve fluidly connected to a working air path of the vacuum cleaner to selectively open to reduce suction at the nozzle inlet. The bleed valve is incorporated with the nozzle height adjustment assembly such that movement of the nozzle height adjustment assembly between different height settings will automatically open or close the bleed valve.

[Object] To significantly increased the convenience in suctioning dust on a mop with use of a negative pressure of an electric vacuum cleaner. [Solution] A hose coupling device 10 includes a connecting pipe 14, a branch pipe 15, a ball valve 40. The connecting pipe 14 has openings, one of the openings configured as a first inlet 31 and another one of the openings configured as an outlet 33 communicating with the one of the openings. The branch pipe 15 continues from a lateral surface of the connecting pipe 14 and has an opening configured as a second inlet 32. The ball valve 40 is arranged in a valve box 35 at which the connecting pipe 14 and the branch pipe 15 communicate such that the ball valve 40 is rotatable about a rotation axis corresponding to an axis of the branch pipe 15 while the ball valve 40 remains in contact with an inner wall of the valve box 35. The ball valve 40 includes a first sidewall 41, a second sidewall 42, a third sidewall 43 facing the branch pipe 15, a through hole 45, and a communicating groove 46 extending from the third sidewall 43 to the second sidewall 42. The ball valve 40 is configured to rotate about the rotation axis between a first communicating position to connect the first inlet 31 to the outlet 33 via the through hole 46 and a second communicating position to connect the second inlet 32 to the outlet 33 via the communicating groove 46.

This application provides a dust extraction apparatus and a battery production line. A copper nozzle is disposed on a first end face of a cover plate, and a channel of the copper nozzle communicates with a through hole of the cover plate. A dust extraction assembly is disposed on a second end face, and a cavity having a first port and a second port is formed in the interior of the dust extraction assembly. The first port faces the through hole, and a suction apparatus is connected to the second port. The dust extraction apparatus in embodiments of this application can extract dust via the first port of the dust extraction assembly facing the through hole, thus promptly exhausting impurities such as smoke and welding slag generated during welding.

An apparatus for a vacuum cleaner for compensating air pressure fluctuations includes a main body through which an air flow is flowable in a flow direction, where the main body contains a passage opening, and a separating element, where the passage opening is separated from ambient air by the separating element. The separating element is movable such that, as a result of a movement of the separating element in a radial direction, a reservoir which receives an air volume is produced between the main body and the separating element such that a vacuum produced in the main body by the air flow is at least partially maintained.

A self-propelled vacuum cleaner (1) according to the present disclosure includes a main body (10), a plurality of suction ports (30), a plurality of suction pipes (40), a valve (50), a sensor (80), and a controller (90). The main body (10) is independently movable in an environment. Each of the plurality of suction ports (30) is independently disposed on a bottom surface (11) of the main body (10). The plurality of suction pipes (40) is disposed inside the main body (10), and each of the plurality of suction pipes (40) is connected to the plurality of suction ports (30). The valve (50) is disposed in at least one of the plurality of suction pipes (40). The sensor (80) acquires object information regarding an object in the environment. The controller (90) controls each unit. In addition, the controller (90) controls the valve (50) on the basis of the acquired object information.

A cleaner is provided. The cleaner comprising a hand-held device, in which the hand-held device includes: a housing defining an air inlet, an air outlet and an air blowing port therein, the air blowing port being disposed adjacent to the air inlet; a dust cup disposed in the housing and connected with the air inlet; and an electric motor defining a motor chamber, wherein an airflow entering through the air inlet switchably flows out of one of the air outlet and the air blowing port by a switching mechanism after flowing through the dust cup and the electric motor.