The invention pertains to a filter retaining assembly which is rigid and self-supportive without requiring any additional structural reinforcement. The design maximizes the filter surface to be used for air filtration and increases the filtration efficiency. The invention is also designed to minimize the filter assembly size to fit into the valuable space when the air handling unit physical dimension is constrained. The invention uses integral construction methods to save assembly time and labor by eliminating the need of using alignment holes and fastening each individual frame to construct a conventional filter retaining assembly. The proposed method maintains flexibility of scaling to any filter size and quantity.

An air filter system for a motor vehicle includes a common housing, first and second D-shaped filter elements and a common cover. The common housing defines a first airflow chamber extending between a first inlet duct and a first outlet duct and a second airflow chamber extending between a second inlet duct and a second outlet duct. The first airflow chamber is fluidly separated from the second airflow chamber. The first D-shaped filter element is disposed in the first airflow chamber for filtering air passing through the first airflow chamber. The second D-shaped filter element is disposed in the second airflow chamber for filtering air passing through the second airflow chamber. The common cover is secured to the housing and closes the first airflow chamber and the second airflow chamber.

A filter element having a longitudinal center axis for a fresh air system of an internal combustion engine may include a first plate filter body composed of a pleated filter material and a separate second plate filter body composed of a pleated filter material. The filter element may include first wall body and a second wall body, and a first end body and a second end body. The first wall body, the second wall body, the first end body and the second end body may be connected to the first plate body and the second plate filter body to define an inner space. At least one of the first plate filter body and the second plate filter body may include a curvature projecting to the interior space in a profile extending transversely to a longitudinal direction with respect to the longitudinal center axis.

The present invention discloses a high-temperature steam-water filtering unit, which comprises: a filter frame divided into an upper layer and a lower layer by an interlayer, the lower layer being provided with a feed inlet, and the upper layer being provided with a discharge port; a filter comprising a plurality of filter cartridges mounted on the interlayer along a vertical direction, an inlet of each filter cartridge being positioned below the interlayer, and an outlet of each filter cartridge being positioned above the interlayer; and a communicating channel being in communication with the discharge port. The present invention also discloses a combined high-temperature steam-water filtering device, which comprises: two or more filtering units arranged in an outer shell and communicating channels extending along a vertical height direction of filter frames and being in communication with discharge ports and feed inlets of the adjacent filtering units. In the present invention, filters and a filter frame which are spliced and combined are combined into a filtering unit, and the filtering units can be freely combined according to the requirements of filtering precision, filtering flow, pressure reduction and the like.

A filter frame for an air handling unit, an air handling unit, and a method of assembling a filter frame for an air handling unit. The filter frame (100) includes a holder (110) defining a cavity configured to receive a plurality of filter cells (201, 202; 201, 202, 203), and a removable lid (120) configured to secure the plurality of filter cells (201, 202; 201, 202, 203) in the cavity. The removable lid (120) can also include a biasing element (130) configured to urge the plurality of filter cells (201, 202; 201, 202, 203) together within the cavity, to assist with securing the plurality of filter cells (201, 202; 201, 202, 203) in the cavity.

A filter frame for an air handling unit, an air handling unit, and a method of assembling a filter frame for an air handling unit. The filter frame (100) includes a holder (110) defining a cavity configured to receive a plurality of filter cells (201, 202; 201, 202, 203), and a removable lid (120) configured to secure the plurality of filter cells (201, 202; 201, 202, 203) in the cavity. The removable lid (120) can also include a biasing element (130) configured to urge the plurality of filter cells (201, 202; 201, 202, 203) together within the cavity, to assist with securing the plurality of filter cells (201, 202; 201, 202, 203) in the cavity.

The invention relates to an exhaust air purification device for a livestock stable comprising at least one exhaust air scrubber having a filter body that can be wetted with a scrubbing liquid or that can absorb a scrubbing liquid; and a scrubbing liquid container holding a scrubbing liquid; wherein the at least one exhaust air scrubber is arranged on a moving device, the moving device being designed and arranged to immerse the at least one exhaust air scrubber completely or partially into the scrubbing liquid in the scrubbing liquid container.

A system (10) for removing airborne pathogens can include a housing (1, 4, and 6) having at least one or more chambers, a bipolar ionizer (9A), at least one particle filter (8), and an ultra violet light radiation source (5A) residing in at least one or more chambers. Furthermore, the embodiments can include the use of a ventilation system which can include a fan (3) that draws in surrounding air at an intake (7A) and directs the surrounding air towards the at least one particle filter, the bipolar ionizer, and the ultra violet light radiation source before the ventilation system expels the surrounding air drawn through the intake through an exhaust vent (7B).

A gas flow control device and a filtering system for a flow of dust-laden gas. The gas flow control device includes a damper blade arranged to be pivoted through a definite pivoting angle around a substantially horizontal pivot axis, for regulating the flow of the dust-laden gas in an inlet channel by pivoting the damper blade between an open position and a closed position. At least one substantially planar guide baffle is attached to each of two opposite, substantially planar surfaces of the damper blade, the at least one guide baffle extending from the pivot axis in the direction of the normal of the general plane of the damper blade substantially to an opposite inner surface of the inlet channel, for controlling the distribution of the dust-laden gas flow to a fabric filter enclosure.

An exhaust unit includes a dirty air intake opening, a clean air output opening and an airflow path defined between the dirty air intake opening and the clean air output opening. The exhaust unit further includes an upstream quenching section and a downstream filtering section along the airflow path. The quenching section has a wetting chamber that includes a reservoir having a fill level for a quenching liquid, and a downtube connected over the dirty air intake opening and opening at its end above, and in opposition to, the plane of the fill level.