Systems and methods for an adjustable unloader control are provided. The adjustable unloader control may be used with a pressure washer system, or any other liquid container configured to dispense liquid. The system includes an adjustable pressure knob that restricts flow rate and pressure of the liquid from the container, as well as an accompanying pump. The adjustable pressure knob is preferably rotated 360 degrees or less, meaning that a user can move the system from a closed position to a fully opened position with a single rotation of the knob. This enables a user to quickly and easily activate or deactivate the flow of liquid from the pressure washer or other device. The knob may also be moved to intermediate positions between the fully opened and closed positions. The system may enable flow rates of approximately 2-4 gallons per minute, and pressures of between 40-3,500 pounds per square inch.

Provided in the present invention is a pressure washer (100, 200), including: a frame (5); a power unit (1, 1A) supported by the frame; a pump (13, 33), supported by the frame, driven by the power unit, and used to pressurize an influent fluid so as to output a pressurized fluid; a jetting gun (2, 2A), configured to receive the pressurized fluid outputted by the pump and jet the pressurized fluid; and a controller (23, 23A), connected to the power unit (1, 1A) and used to control operation of the pressure washer. The pressure washer is characterized in that: the controller (23, 23A) includes a heat sink (18, 38) used to dissipate heat from the controller, and the heat sink (18, 38) includes a heat sink body, and is provided with a fluid tube (16a, 17a, 36) so as to perform fluid-based heat dissipation. The present invention proposes using a fluid (e.g., water or water containing a cleanser) flowing through the pressure washer to perform fluid-based cooling on the heat sink of the controller, so as to reasonably utilize resources and improve heat dissipation performance.

A bracket assembly for an integrated LIDAR and camera-based sensing system is provided. The bracket assembly can be mounted to a LIDAR sensor and includes a camera housing. The bracket assembly also includes a plurality of liquid spray nozzles and a plurality of air blower ducts. The plurality of liquid spray nozzles discharge a cleaning liquid (e.g., washer fluid) toward the exterior surface of the LIDAR sensor and the camera sensor, and the plurality of air ducts discharge compressed air toward the exterior surface of the LIDAR sensor and the camera sensor. The liquid spray nozzles and the air ducts cooperate to clear foreign matter from the LIDAR sensor and the camera sensor despite being close to the edge of each such sensor.

A steam cleaning accessory for use with a steam generator comprises a flexible body comprising a base. At least one steam conduit is connectable to the steam generator and arranged to be in fluid communication therewith. The steam conduit comprises at least one steam outlet for ejecting steam and the at least one steam outlet is mounted on an underside of the base which is configured to be adjacent to a surface to be cleaned. A flexible pocket is mounted on the flexible body and arranged to receive a user's hand. The at least one steam conduit comprises at least one first open channel extending across a longitudinal axis of the flexible body and the flexible body is foldable along the at least one open channel.

The invention provides a device for cleaning and maintaining the interior of a hub in a wind turbine nacelle, belonging to the technical field of wind power equipment. The device comprises a handle component, a switching assembly, a combined cleaning assembly and a maintenance assembly. The switching assembly is connected in a switching shaft block through a switching shaft. A high-temperature steam cleaning mechanism and a negative-pressure contaminant suction mechanism are arranged in the cleaning assembly to remove oil contaminants in the hub in the wind turbine nacelle. The device has a high level of integration, is easy to operate, and can improve the operation stability of a wind turbine.

A pressure washer for dispensing either water or a water-chemical mixture includes an injector for injecting chemical into water flowing through a hose at a relatively high flow rate. A sprayer connected to the hose has a passage having one upstream, one middle, and first and second downstream portions. The first downstream portion is connected to a high pressure conduit and the second downstream portion is connected to a high flow conduit less resistance to fluid flow than the high pressure conduit. A valve between the upstream portion and the middle portion selectively allows fluid flow to the middle portion of the passage. Another valve between the middle portion and downstream portion selectively allows flow to the second downstream portion and high flow conduit. Otherwise the valve directs flow through only the first downstream portion and high pressure conduit, which limits flow rate so as not to activate the injector.

A method of removing material from a surface of a workpiece includes discharging a flow of fluid towards a workpiece at a pressure and a flow rate that facilitates forming a plurality of cavitation bubbles, and introducing abrasive media. The method includes exciting the abrasive media with the cavitation bubbles, removing material from the workpiece by an interaction between the cavitation bubbles and the abrasive media, and the surface of the workpiece.

The utility model discloses an adjustable coating cleaning gun, comprising a gun body, a trigger switch and a cleaning solution storage kettle, wherein a cleaning spray head is fixed to a gun head of the gun body; a spray pipe joint is fixed to a gun head air passage of the gun body; a swinging spray pipe is arranged in the cleaning spray head; the swinging spray pipe is a hollow elliptical pipe; a long axis of a section of the hollow elliptical pipe is longitudinally arranged, and a short axis is horizontally arranged.

A water-fed pole for window cleaning comprising: an extendable pole comprising two or more pole sections, the pole sections being moveable relative to each other, in use, to extend and shorten the pole; and one or more clamps, each clamp being coupled to a given pole section and being operable to clamp the given pole section to an adjacent pole section, thereby fixing, in use, the length of the pole; wherein the or each clamp comprises a clamping surface arranged such that, on operation of the clamp, the clamping surface is brought into contact with a surface of the adjacent pole section to clamp the given pole section to the adjacent pole section, wherein at least a portion of the clamping surface comprises a resilient material.

The utility model discloses a dual-purpose rotating spray gun for dust removal and cleaning, comprising a gun body (1), a trigger switch (2), a pot body assembly and a rotating spray apparatus, wherein the rotating spray apparatus comprises a bidirectional connector (3), a spray nozzle (4), a connecting sheath (7), a hollow rotating shaft (5), a rotating spray head (10), a spray pipe (9) and a cleaning solution suction pipe (13); one end of the bidirectional connector (3) is fixed to an air passage outlet of the gun body (1); the other end is fixed to the connecting sheath (7); the hollow rotating shaft (5) is arranged in the connecting sheath (7); the spray nozzle (4) is fixed to an outlet of the bidirectional connector (3); the spray head of the spray nozzle (4) is matched with the hollow rotating shaft (5); the rotating spray head (10) is fixed to the hollow rotating shaft (5) and is provided with a rotating spray track (18); the spray pipe (9) is fixed to the rotating spray track (18); an inlet of the spray pipe (9) is communicated with the hollow rotating shaft (5); and an outlet of the spray pipe (5) is positioned on an outer end surface of the rotating spray head (10). After the structure is adopted, the utility model has the characteristics of simple structure, convenient production and processing, stable quality, low operating conditions, good dust removal and cleaning effects, long life and the like.