An environmental air cleaning device for a road vehicle removes dust, particulate matter, and/or gases from environmental air. The environmental air cleaning device has one or more filter elements. The environmental air cleaning device is provided with a mounting device that rigidly couples to a vehicle-side mounting device for roof loads. A road vehicle with such an environmental air cleaning device is provided.

Disclosed is glue-free airtight filtering equipment comprising a filter housing, a plurality of filter elements and a plurality of receiving supporting elements, each filter element having a filtering surface, the plurality of filter elements being detachably disposed in the filtering space in a manner that the filtering surface is parallel to the upper surface and the bottom surface of the filter housing, and the plurality of receiving supporting elements allocating on an inner wall of the filter housing and being spaced apart from each other with a designated distance so as to correspondingly receive and support the plurality of filter elements, wherein a gap is provided between the filter element and the inner wall of the filter housing, and the filtering surface of the filter element and the maximum value of the gap satisfy a relational expression.

Embodiments of the present disclosure are directed to cyclonic air filtering systems for removing fine particles from an air stream. In some embodiments, small diameter cyclonic separators/elements are used to remove fine particles from an airflow where a large number of such elements are assembled together in a compact arrangement. In some embodiments, an air filtration system is presented and can comprise a housing including a plurality of compartments, an air inlet side and an air outlet side. Such a system can further include a plurality of cyclonic filtering arrays each housed in a respective compartment and each comprising an assembly of a plurality of cyclonic elements configured to filter air of an airflow via centrifugal force (i.e., cyclonic separation). The system can include mating means configured such that most, and in some embodiments, all of the airflow flows only through the arrays.

The present application provides a filter fixing device, comprising: a lock mounting piece, a hold-down piece, a push rod and at least one connecting rod. The lock mounting piece is provided with a lock used for engaging the lock receiving part on the filter fixing frame; the hold-down piece and the lock mounting piece are connected to each other in such a way that they can move relative to each other in a first direction, and the hold-down piece is used to hold down the filter; the push rod is connected to the hold-down piece and can pivotally rotate around an axis; at least one connecting rod is pivotally connected to the push rod and the lock mounting piece; the filter fixing device is configured in such a way that the rotation of the push rod relative to the hold-down piece may cause relative motion of the hold-down piece and the lock mounting piece in the first direction. The filter fixing device provided by the present application has a simple structure, is easy to operate, and can firmly hold the filter so that it is possible to easily replace the filter while meeting the requirement on the filtering performance of the air conditioning unit.

A cabin air filter is provided with a filter element receptacle and a filter element having a fold pack. The fold pack has a first fold pack area having a fold height that is greater than the fold height of a second fold pack area. The filter element is inserted in an insertion direction into the filter element receptacle. The second fold pack area may form a sword that extends in the insertion direction away from a face of the filter element. The filter element has lateral strips that close off the fold pack on at least two sides of the fold pack. The sword is preferably inherently stable so that it can transmit compressive forces from the filter element to the receptacle.

A side-covered axial flow filter has a housing, a filter core, a filter frame, and a side cover. When assembling, the filter frame and the filter core are both obliquely installed into the housing. Limiting ribs of the filter frame are obliquely mounted between first pushing panels and a clamping surface of the housing, and inner pushing parts of the limiting ribs abut the first pushing panels. The portions of the inner pushing parts abutting the first pushing panels serve as fulcrums to straighten the filter core and the filter frame, so outer pushing parts of the limiting ribs may abut the clamping surfaces of the housing and generate a strong torque and a tightly sealing effect without much effort. The side cover also abuts the filter frame when assembled on the housing, so the filter frame is under balanced pressure to avoid leak.

A filter assembly, a ventilation assembly and an air-conditioning apparatus are provided. The filter assembly includes: a filter screen configured to filter air; a supporting portion configured to support the filter screen arranged to the supporting portion; and a mounting portion configured to mount the filter assembly to or adjacent to a mounting port of an apparatus to be provided with the filter assembly, and a shape and a size of the mounting portion matching with those of the mounting port to cover the mounting port. The mounting portion includes a sealing part having a shape approximately the same with a shape of a gap between the mounting portion and the mounting port and has an interference fit with the gap, to seal the gap between the mounting portion and the mounting port.

In an air cleaner, a cassette is removably installed in an air cleaner housing. The cassette holds therein a filter formed by stacking a chemical filter and an air cleaner element. At the time of replacement or inspection of the filter, the cassette is pulled out of the air cleaner housing, and then the filter is removed from the cassette. Further, after completion of the replacement or inspection, the filter is placed in the cassette, and the cassette is installed in the air cleaner housing.

A filter assembly structure and a water heater including the same are provided. The filter assembly structure includes a filter housing coupled to an inner surface of a base panel provided in a case of a water heater, and including a flow space formed together with the inner surface of the base panel and an entrance to communicate with the flow space, and a filter assembly detachably assembled with the filter housing and including an air filter to filter air introduced through an air inlet provided in the base panel. The filter assembly is provided in a slide structure and inserted into or separated from the filter housing through the entrance.

The present invention is a filter assembly for use in a filter furnace and includes a frame, filter media and housing. Frame has an opening and a handle. Opening of frame facilitates receiving of filter media in frame and removing of filter media from frame. Assembly of frame and filter media is introduced in housing. After receiving of the assembly of frame and filter media, housing is inserted in a confined space provided between an air return duct and a main furnace of filter furnace by pushing handle of frame. During periodic maintenance, handle is pulled to remove housing from the confined space. Assembly of filter media and frame is removed from the housing. Filter media is removed from frame for cleaning or replaced with a new filter media. Frame also secures filter media and prevents filter media from being sucked in a blower motor of main furnace.