Abstract: An air cleaner assembly (10) is disclosed. The assembly (10) includes a plurality of interconnected wall members (14, 16, 18, 20) which define between them a generally ring-shaped scavenging air chamber (22). A plurality of centrifugal separators (24) are supported in the scavenging air chamber (22). Each centrifugal separator (24) includes a first tubular member (26) which has an inlet end (32) for admitting air and an outlet end (34) which is in fluid communication with the scavenging air chamber (22). Each centrifugal separator (24) also includes a mechanism (30) for swirling air passing through the first tubular member (26) and a second tubular member (28). The second tubular member (28) has an inlet end (36) adjacent the outlet end (34) of the first tubular member (26) and an outlet end (38) exterior of the scavenging air chamber (22).

Abstract: An internal combustion engine air cleaner assembly has a lower supporting tray wall, a top cover or enclosure wall, and a side wall, together defining a hollow air expansion chamber containing a filter element; the chamber has an air inlet and an outlet opening to the engine that lies in the plane of the lower wall, the outlet being part of an angled outlet orifice cowl asymmetrically positioned with respect to the centerline of the surrounding side and top walls and surrounding the outlet and having an inlet that is in a plane inclined to the planes of the top and side walls to reduce noise.

Abstract: Solid components such as dust particles having a lighter density are sepaed from a flowing medium, such as a gas, wherein the dust is suspended. The gas has the lightest density. For this purpose, the flowing medium which includes the gas and the solid components suspended therein, is detoured in a bent channel and partially introduced into a whirling chamber, which contacts the bent channel along its entire axial height to communicate with the channel along its inner bent portion, whereby the flow produces a centrifugal field in said whirling chamber. Two immersion pipes extend coaxially into the chamber, one pipe from each end. The pipes are connected to suction means, such as fans, for sucking the lighter component out of the whirling chamber. These pipes extend deep enough into the central region of the chamber so that the sucking of the lighter component out of the chamber takes place at said central region of the whirling chamber.

Abstract: A sterile air recycling module is mounted to a wall of a room and includes a housing having an outlet for discharging sterile or clean air into the room, opposed grilled inlets for controlling the volume of air drawn into the interior of the housing from the room, and an inlet for fresh air or plant conditioned air, a supply pressure plenum chamber within the housing for discharging air through a high efficiency particulate air (HEPA) filter which is in fluid communication with the housing outlet, and a blower within the housing for withdrawing air from a negative pressure plenum within the housing and an outlet in fluid communication with the supply pressure plenum, the housing inlets being in fluid communication with the negative pressure plenum.

Abstract: A water separator consisting of a baffle and scupper is inserted inside the outlet header of a regenerative heat exchanger for removing water from the air discharged therefrom. The cooled air which contains water droplets leaving the core of the heat exchanger is passed through a baffle constructed to provide a gradual restriction in area in order to increase flow velocity. Heavy droplets of water are separated by the sudden change in airflow direction through the baffle and header. The flow including the heavier centrifuged water droplets then impinge on the inside surface of the header to which the accumulated particles of water adhere and are accelerated by the airflow and the contour of the header toward a scupper located downstream of the baffle opening. The water is collected in the scupper cavity, collected in a drain well, and drained with the assistance of gravity and the resulting pressure differential across the drain port.

Abstract: An improved air cleaner designed for insertion in the air intake conduits of over-the-road vehicles, to have the same diameter as the conduits, and to be readily replaceable as a unit. The invention particularly includes an air-permeable member which tapers, in combination with streamliners for improving the flow of air through the device.

Abstract: A cyclone separator comprising a separating tower defining a separating chamber having a gas inlet at the upper portion for introducing gaseous fluid having particles suspended therein with a tangential velocity component, and outlet pipe means co-axially with the separating chamber at the upper portion thereof to allow the gaseous fluid to flow out of the separating chamber. The separating tower has a bottom which is slightly inclined with respect to a horizontal plane to provide a lowermost portion in the bottom, and a particle outlet port at said lowermost portion. A vibrating motor applies vibration at least to said bottom of the separating tower, and a baffle plate is provided in said separating chamber above and spaced from said particle outlet port.

Abstract: An electronic air conditioner, in which a charging section, a dust collecting section (including an electrostatic dust collecting section and an ozone reducing section) and a negative ion generating section, known per se, are arranged in this order along the flow path of air extending from the air inlet to the air outlet in a casing of insulating material to provide a compact electronic air conditioner capable of air hearing, air cooling and air cleaning. At an appropriate position between the air inlet and the air outlet in the casing, a fan is provided to cause a flow of air. Between a mechanical filter provided at the air inlet and the negative ion generating section, a heat exchanger is provided to act on the flow of air for heating or cooling the same. The endothermic-and-thermoradiation fins of the heat exchanger can be also used as a dust collector if grounded.

Abstract: An air filtering system includes a motor driven exhaust fan operable to draw air through a filter for particulate spray material, support means for supporting a dispenser adapted under operator control to dispense particulate spray material into the air and means responsive to operator removal and return of the dispenser to the support means for energizing and deenergizing the motor, respectively.

Abstract: A vortex air cleaner and acoustic attenuator assembly is provided having an array of vortex air cleaners which remove contaminant particles from influent air, and an array of spaced acoustic sheets defining passages therebetween for reception of clean effluent air from selected groups of adjacent vortex air cleaners in the array, the sheets being shaped and spaced to deflect such effluent air and sound pressure waves at least once from the acoustic surface of the sheets, thereby absorbing the maximum sound in the preferred frequency range of 8000 Hertz and reducing the imposed sound pressure level in which the vortex air cleaner assembly operates.

Abstract: A mobile air filtering apparatus for hospital rooms, comprises a housing having an inlet and an outlet. A pre-filter is located at the inlet and a fan for directing air in succession through a heater, a diffusion foil moistener and a mechanical filter. The diffusion foil moistener is located between the heater and the mechanical filter and it includes a heat exchange conduit for conducting the water to the moistener which is coiled around the filter. The filter housing is mounted on a fork-shaped arm which is carried on a stand in an adjustable position and the stand is moved around with its associated carriage filter.

Abstract: An electrostatic filter type gas cleaner having relatively electrically insulated discharge and collecting electrodes between which the gas to be cleaned is passed. The collecting electrodes are mounted concentrically around the discharge electrodes and are rotatable relative to them so that particles separating from the gas and depositing on the collecting electrodes are almost immediately thrown away from these electrodes. A casing surrounds the collecting electrodes and serves to collect and carry away the particles separated from the gas. The interior space of the casing is not influenced by the gas flow between the discharge and collecting electrodes. Moreover, means are provided at the peripheral part of a prolongation, extending in the direction of the gas stream, of the annular gap between the discharge and collecting electrodes to lead off the peripheral portion of the gas stream radially outwards to a separate outlet.

Abstract: An arrangement for improved energy recovery in the pure gas outlet of a centrifugal separator which includes a cylindrical centrifugal chamber with a coaxial raw gas inlet at one end and a coaxial pure gas outlet at the other end and which is equipped with tangential auxiliary gas inlets in the region of the periphery of the centrifugal chamber inclined at an angle with respect to the raw gas outlet with a particle outlet concentrically surrounding the raw gas inlet, in which the pure gas outlet is conically flared and opens with its larger end into a cylindrical, closed ring chamber which includes a cover plate opposite the open outlet tube. A radially extending plate of a diameter smaller than that of the cylindrical ring chamber is attached to the larger, open end of the conical outlet tube and an aerodynamic body in the shape of a circular cone protrudes from the cover plate into the opened conical outlet tube.

Abstract: An air cooler and cleaner for cooling compressed-air coming from an air-compressor and for removing the moisture content thereof and for removing lubricant oil and solid particles and other contaminants which may be entrained therein. The air cooler and cleaner includes a tubular aluminum housing and an upper housing-closure and a lower housing-closure. Sheet-aluminum cooling fins having housing-receiving openings and cylindrical spacer and heat-conductor collars around said openings heat-shrunk onto the housing in firm thermally-conductive contact therewith and spacing the fins in relation to each other. A swirl-chamber in the lower portion of the housing and a cooling-chamber in the upper portion of the housing. The swirl-chamber has a tangential air-inlet for rapidly spinning the air therein. An inverted cylindrical cup-like air-director within the cooling-chamber for directing the air against and along the wall of the cooling-chamber in a thin layer.

Abstract: An air cleaner is described for removing airborne contaminants in a room. The air cleaner includes a housing defining a linearly elongated duct in which is mounted, in stated order, a low efficiency filter, a high efficiency filter, and a blower. Suitable baffling is mounted to the housing to isolate the intake and discharge orifices of the blower and the blower is oriented to discharge air from the duct in a direction substantially coinciding with the direction of flow of air through the duct.