A dirt separator for a vacuum cleaner including a chamber having an inlet through which dirt-laden fluid enters the chamber and an outlet through which cleansed fluid exits the chamber; and a disc located at the outlet, the disc being arranged to rotate in a predetermined direction about a rotational axis, and including holes running from an upstream face to a downstream face through which the cleansed fluid passes. When viewed along the radial direction of the disc, the path of each hole through the thickness of the disc defines a centreline, the centreline being inclined such that it is non-perpendicular to the disc. The centreline of each hole is inclined such that it intersects the upstream face of the disc at a point which is behind, in the direction of rotation of the disc, the point at which the centreline intersects the downstream face of the disc.

The present disclosure provides an air processing module and an air conditioner. The air processing module includes a housing and an air processing assembly. The housing includes a base plate and a coaming formed by a periphery of the base plate extending upwardly, the coaming comprises an air inlet. The air processing assembly is mounted in the housing. The air processing assembly includes a filter canister, a support plate, and a mounting board, the filter canister is detachably mounted to the support plate, the support plate is rotatably mounted to the mounting board, the mounting board is slidably mounted in the housing along the inside and the outside of the air inlet.

Assembly to be used to filter a fluid, containing a housing (29) which comprises a housing base (50) and a housing upper part (30) connected removably to the housing base (50). An axial shaft (34, 35) extends at least partially through the filter element (32, 33) when the filter element (32, 33) is contained inside the housing (29). A lower bearing (44) is arranged between the axial shaft (34, 35) and the housing base (50) and underneath the filter element (32, 33) when a filter element (32, 33) is contained inside the housing (29). The housing (29) is able to contain a filter element (32, 33) within it and the filter element (32, 33) fits onto the axial shaft (34, 35) in such a way that the axial shaft (34, 35) is rotationally coupled to the filter element (32, 33). The filter assembly (20, 120) has no bearing above the filter element (32, 33).

Described are multi-stage drum filtration systems including a primary rotary drum filter stage, at least one passive filter stage, and a main fan configured to create a vacuum on an inlet side of the primary rotary drum filter stage. The multi-stage drum filtration system may also include a HEPA filter stage. A controller may be configured to control a speed of the main fan to maintain an inlet vacuum to the primary rotary drum filter stage that corresponds to an inlet vacuum set point input.

A dust collecting apparatus is provided. The dust collecting apparatus according to an embodiment includes a dust collecting case including a dust outlet to discharge collected dust, a cyclone member configured to rotate and move linearly in the dust collecting case to be detachable from and attachable to the dust collecting case, a discharge cover configured to rotate and move linearly together with the cyclone member, and detachable from and attachable to an upper part of the dust collecting case to open and close the dust outlet, and a sealing member having elasticity disposed between the dust collecting case and the discharge cover. The discharge cover rotates along a horizontal direction of the dust collecting case to detach from the upper part of the dust collecting case and form a space between the sealing member and the dust collecting case.

A robot purifier including: a purifying part which draws, purifies, and discharges air; and a driving part which is located at a lower end of the purifying part and is capable of autonomous driving, wherein the purifying part is capable of rotating 360 degrees horizontally, and the purifying part also is capable of rotating vertically such that an air intake direction and an air discharge direction in the vertical and horizontal directions is controllable.

Disclosed are multiple stage rotating coalescer devices comprising a first stage and a second stage. The first stage may include a rotating coalescing element comprising coalescing media. The second stage is positioned either upstream or downstream or the first stage. The second stage may include one of: (i) a rotating cone stack separator, or (ii) a separate rotating coalescing element comprising coalescing media.

A centrifugal mesh mist eliminator generally comprises a cylindrical roll of mesh attached to a vertical rotating shaft positioned within the center of a pressure vessel. A horizontal partition within the pressure vessel forms a barrier seal between the upper and lower portions thereby directing droplet laden gas flow through the rotating mesh. The incoming droplet laden gas stream enters the lower portion of the pressure vessel through an inlet nozzle. The droplet laden gas stream flows through the rotating cylindrical mesh element where it enters the top section of the pressure vessel. Droplets impinge on the mesh and coalesce into larger diameter drops. These larger diameter drops detach from the mesh due to centrifugal force. The detached liquid droplets settle to the bottom of the vessel as their mass is sufficient to overcome the surrounding flow stream drag force. Liquid discharges from the bottom of the vessel through an outlet nozzle while dry gas exits through a top outlet nozzle.

Intake assemblies for an engine are provided. In one aspect, an air intake assembly includes a screen defining a plurality of air passage holes therein, a fan, a flywheel, a crankshaft, and a screen support member coupled to the screen. The fan, the flywheel and the screen support member are coupled to the crankshaft with a single fastener, and the screen, the fan, the flywheel, the crankshaft and the screen support member all rotate together. In one aspect, the screen support member supports the screen a distance away from the fan such that the screen is completely spaced-apart from and does not engage the fan. In one aspect, a screen support member includes a base near one end of the screen support member and a plurality of coupling locations near a second end. The screen couples to the screen support member at the plurality of coupling locations.

A force generating apparatus is configured to induce a force on at least a portion of objects of interest within a first channel system between a first point and a second point, where the average force comprises a non-zero component directed from the first point towards the second point. The magnitude of the associated change in the thermodynamic properties of the objects of interest between two given points within the first channel system is a function of the relevant properties of the channel system, such as the shear stress coefficient or the resistivity of the channel system to bulk flow of objects of interest. A second channel system can comprise a first point and a second point, and the second point of the second channel system can be diffusively coupled to the second point in the first channel system. The relevant properties of the second channel system can be configured to be different to the relevant properties of the first channel system. The difference in the magnitude of the change of thermodynamic properties between the first and second points in the first channel system and the second channel system can be employed to increase the pressure of objects of interest in a second reservoir relative to a first reservoir. A pressure modification apparatus and method can be used to convert thermal energy into useful energy, such as mechanical work or electricity, for example.