An air filtration apparatus includes an airflow powerhead assembly including a fan assembly and a vane assembly, a filter assembly, and a separator chamber housing inside of which the filter assembly is disposed. The separator chamber housing has a chamber inlet at a first axial side and a clean air outlet at a second axial side of the separator chamber housing opposite the first axial side. The filter assembly has a first axial end adjacent the chamber inlet and a second axial end adjacent the clean air outlet. The separator chamber housing includes at least one debris ejection slot extension configured to eject debris from an inner space of the separator chamber housing. The filter assembly includes a debris catch tray disposed at the second axial end, the debris catch tray having a debris ejection slot aligned with the at least one debris ejection slot extension.

Assemblies, features, and techniques for pulse jet air cleaner assemblies and their operation are described. Techniques described include methodology and equipment for preferred pulse jet sequencing and operation.

A dust collector is provided, which includes a housing, a filter screen, and a spiral air director. The housing is provided with an air inlet, an air inlet channel, an air outlet channel, an air outlet, and a dust collection chamber. The dust collection chamber is in communication with the air inlet and the air outlet through the air inlet channel and the air outlet channel, respectively. The filter screen is disposed in the air outlet channel. The spiral air director is disposed in the air outlet channel and located on at least one side of an air inlet side and an air outlet side of the filter screen. Air flow flowing through the air outlet channel is directed by the spiral air director to form a swirling air flow.

A filtration unit for aspirating infectious aerosols and spray droplets expelled from a patient's mouth is disclosed. The filtration unit has a housing defining an air inlet; an articulated tube assembly fluidly connected to the air inlet; a hood connected to the tube assembly; a fan disposed in the lower portion of the housing; and at least one filter disposed in the housing vertically above the fan and fluidly between the air inlet and at least one air outlet defined in the filtration unit. During operation of the fan, air flows sequentially through the hood, then through the articulated tube assembly, then through the air inlet into the housing, then through the at least one filter, and then out of the housing via the at least one air outlet. A method of using the filtration unit is also disclosed.

Assemblies, features, and techniques for pulse jet air cleaner assemblies and their operation are described. Techniques described include methodology and equipment for preferred pulse jet sequencing and operation.

An air filtration apparatus includes an airflow powerhead assembly including a fan assembly and a vane assembly, a filter assembly, and a separator chamber housing inside of which the filter assembly is disposed. The separator chamber housing has a chamber inlet at a first axial side and a clean air outlet at a second axial side of the separator chamber housing opposite the first axial side. The filter assembly has a first axial end adjacent the chamber inlet and a second axial end adjacent the clean air outlet. The separator chamber housing includes at least one debris ejection slot extension configured to eject debris from an inner space of the separator chamber housing. The filter assembly includes a debris catch tray disposed at the second axial end, the debris catch tray having a debris ejection slot aligned with the at least one debris ejection slot extension.

An air management assembly for a work machine, the air management assembly having a cooling orifice defined in a panel, a cooling fan generating a cooling airflow through the cooling orifice to a cooling package, at least one fixed screen positioned along an intake orifice, and a first baffle positioned at least partially between the cooling orifice and the intake orifice. Wherein, the first baffle directs the cooling airflow partially across the fixed screen to clear the fixed screen of debris.

An system includes a fabric filter, an air supply system, a pulsing valve that is coupled to the air supply system and is configured to generate a statistical pulse of air that is directed to the fabric filter, an air flow monitor that is configured to monitor a flow of air associated with the statistical pulse of air, and a valve controller that is coupled to the air flow monitor that is configured to generate a performance signature for the pulsing valve based on the flow of air that was monitored.

A separator assembly includes a chamber having an inlet and an outlet where a flow path is defined through the chamber from the inlet to the outlet. In some examples, the separator assembly includes a screen configured to filter solid material from a fluid flowing along the flow path. The separator assembly may include a pulse jet assembly configured to selectively clean the solid material from the screen. In various examples, the separator assembly may include a bleed-in assembly having a bleed-in port and configured to selectively direct a fluid through the bleed-in port and into the chamber.

Assemblies, features, and techniques for pulse jet air cleaner assemblies and their operation are described. Techniques described include methodology and equipment for preferred pulse jet sequencing and operation.