A method and apparatus for an inline air purification system is described herein. An example apparatus includes a housing, a high-velocity air flow guide, a filter assembly, and a fan. The high-velocity air flow guide includes a first portion and a second portion. The first portion is configured to form a passage within the housing, and the second portion is configured to divert and accelerate air flow of the ambient air from the passage to a chamber of the housing. The filter assembly includes one or more filtering elements configured to receive the ambient air from the chamber. The fan is configured to draw the ambient air from the chamber through the filter assembly and to generate processed air from the ambient air. The housing is located in an HVAC duct, and occupies only part of the cross-sectional area of the duct. The remaining area of the duct accommodates bypass air flow to a primary fan in the HVAC system.

Granular material flows out through the discharge opening of a silo and through a sealed housing to a target location. A vent opening in a top portion of the silo has a vent cover operative to selectively open and close the vent opening. When the vent cover is closed, air movement into an upper portion of the silo is prevented. A gate is operative to control a flow of granular material through the discharge opening. A vacuum conduit has a lower input end thereof connected to an interior of the housing, and an upper output end thereof located in an upper portion of an interior of the silo. Material flowing out of the silo creates a vacuum drawing dust from the housing up the vacuum conduit into the silo.

A filter system for filtering fluid has a filter housing with inlet socket and outlet socket for fluid. A central tube with radially open region over a portion of its axial length is arranged in the filter housing in flow communication with the outlet socket in an operating state. Within the central tube, a secondary element is arranged slidably between first and second operating positions. A filter element, separating a raw fluid side from a clean fluid side, has a filter bellows with a first end plate at a first end face and a second end plate at a second end face. The end plates have central openings for receiving the central tube in the filter element interior. In the first operating position, the secondary element opens a fluid path through the radially open region of the central tube and closes the fluid path in the second operating position.

A fluidized bed system is a single unitary modular system that packages a circulation fan, a fluidized bed, and a dust collection system within a same structure. The structure is formed to include internal ducts to provide fluid communication between the circulation fan, the fluidized bed, and the dust collection system. The fan provides a flow of air via a pressure duct to the fluidized bed. Particulate is separated from particles included on the fluidized bed by the flow of air being uniformly distributed to the fluidized bed. Particulate separated in a disengagement area and suspended in the flow of air is conducted through a particulate clearance space surrounding the dust collection system. The particulate is captured by the dust collection system and conveyed to a location external to the system.

A handheld air sampler device for enrichment of airborne substances and/or particles, in particular microorganisms, includes: an inlet configured for air intake into a flow channel; an outlet configured for fluidic ally connecting the flow channel to an external vacuum device; a permeable backing element arranged in the flow channel, the backing element being configured to receive and support a filter element; and a sealing element configured for sealing a filter element received on the backing element such that, when a negative pressure is applied to the outlet, air entering the inlet forms an airstream passing the filter element and airborne substances and/or particles, in particular microorganisms, are enriched in the filter element. An air sampling arrangement includes a handheld air sampler device of this type.

A cleaner using a heating, ventilating, and air conditioning (HVAC) module is provided. The cleaner connects a ventilation fan for the HVAC module and a suction fan for vacuum cleaning to a single motor to independently drive the ventilation fan when the HVAC module is operated and to independently drive the suction fan when vacuum cleaning is performed. Accordingly, the number of components and production cost are reduced and, simultaneously, package assembly capability is improved.

An intelligent robot includes at least one accessory to measure activity and state in proximity to the robot; an air filtration module housed in a casing made of a UV blocking material; and a control center to analyze output of the at least one accessory, to recognize a known target user according to the analysis and to control functionality of said robot and the air filtration module for said known target user according to saved preferences for said known target user.

A cleaner includes: a main body that receives a suction motor; and a filter unit that is detachably coupled to the main body to filter air discharged from the suction motor and includes a ring-shaped filter and a filter frame that receives the ring-shaped filter, wherein the filter frame includes: an inner frame; an outer frame that defines a filter space for receiving the filter in cooperation with the inner frame; and a ring-shaped filter cover that connects the outer frame and the inner frame to each other and has one or more air openings.

An air intake structure for an automobile includes an intake duct provided in an engine compartment that is located below an engine hood of the automobile. The intake duct includes an inlet opening, an outlet opening, and a duct body. Air is configured to be sucked in from the engine compartment through which the inlet opening. The air is configured to be supplied to a casing of an air cleaner provided in the engine compartment. The duct body connects the inlet opening and the outlet opening. The duct body has a contact portion that is configured to be in contact with the casing of the air cleaner.

An HVAC system that utilizes an air-to-air heat exchanger includes an HVAC ductwork section including a fan, and a filter assembly in fluid flow communication with the HVAC ductwork section. The filter assembly has a filter compartment having an opening oriented generally transverse to a direction of air flow through the filter assembly. A compressive member is provided on at least a portion of a perimeter extending around the opening. The compressive member is adjustable between an installation configuration in which the compressive member is spaced from a position that is to be occupied by a filter when the filter is installed in the filter compartment and an installed configuration in which the compressive member engages at least a portion of one of an upstream and a downstream face of the filter when the filter is positioned in the filter compartment.