A vehicle cabin filter assembly comprising a filter module and a further filter module positioned downstream of the filter module. Each filter module comprises one or more filter elements. The filter elements of the filter module are pleated at a first pleat pitch and comprise a gas filter element. The filter elements of the further filter module are pleated at a second pleat pitch and comprise a particulate filter element. And the second pleat pitch is smaller than the first pleat pitch.

A filter apparatus for a motor vehicle is provided. The filter apparatus includes a delivery device, which is provided in addition to a ventilation system of the motor vehicle and can be operated independently of the ventilation system for drawing in and delivering air from the interior of the motor vehicle. The filter apparatus includes at least one filter element, through which can flow the air drawn in and delivered by the delivery device for filtering the air. The filter apparatus includes at least one outlet for introducing the air filtered by way of the filter element into the interior. The filter apparatus is designed to wirelessly receive at least one signal emitted by a terminal and to activate the delivery device based on the signal.

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.

An agricultural vehicle has an operator environment with a roof portion, and an air treatment apparatus installed within the roof portion. The air treatment apparatus includes a vehicle HVAC system having an inlet plenum, other HVAC components and an outlet to the operator environment. The air treatment apparatus further includes an air filtration system having at least one external inlet and first and second filtration devices located between the external inlet and the HVAC inlet plenum. The roof portion is a hollow structure having upper and lower surfaces and front, rear, left and right sidewalls, and the first and second air filtration devices are disposed along one of the left and right sidewalls within the hollow structure of the roof portion. The HVAC system is preferably disposed along the rear sidewall within the hollow structure of the roof portion.

An air treatment apparatus for an operator environment of an agricultural vehicle in which air to be filtered is drawn into an air filtration system, filtered and directed to an agricultural vehicle HVAC system. The air filtration system includes first and second filtration devices having respectively coarser and finer levels of filtration. Each filtration device is provided with a respective bypass permanently connected with an inlet end downstream of a valve mechanism that selects between the filtration devices, and an outlet end upstream of the valve mechanism and adjacent the respective filtration device. In use a portion of air flow downstream of the valve mechanism may be recirculated to purge the respective filtration device, and each bypass includes a respective non-return valve opposing transit of air from the outlet to the inlet ends.

An air conditioning system provides inside air conditioning and performs the function of cleaning the inside air, so that the inside air is maintained to be pleasant. The air cleaning time of cleaning the inside air is decreased, so the possibility of moisture generated on an inside window due to the air cleaning is reduced.

An air quality system includes an air precleaner, a filter identification component, and a control module. The air precleaner has a precleaner housing and a filter disposed inside the precleaner housing. The filter identification component is positioned within the precleaner housing at a first position and is mounted on the filter. The control module is positioned within the precleaner housing at a second position and is configured to emit an electrical field and communicate with the filter identification component via the emitted electrical field.

An air filtration system for an operator environment of an agricultural vehicle having at least one external inlet, a first filtration device having a coarser level of filtration located between the external inlet and an HVAC system, a second filtration device having a second finer level of filtration and an associated blower located between the external inlet and the HVAC system 4, where the system selectively connects either the first filtration device to the HVAC system blower or the second filtration device and its associated blower to the HVAC system blower and includes a bypass permanently connecting the HVAC system blower and the second filtration device.

An air-treatment system for a confined environment, in particular the cabin of a vehicle, includes: a supply unit including an inlet port, a delivery port, and a purge port, the supply unit being configured for delivering air to said confined environment through the delivery port; and a first filtering device having a first filtration level, and a second filtering device having a second filtration level, each of the first and second filtering devices being arranged in fluid communication with the inlet port of said supply unit at a circuit node. A single flow-control valve determines inlet flow through one or other of the filtering devices.

A mobile mining machine includes a base, a main housing supported on the base, and an air filtration unit configured to provide filtered air to the main housing. The air filtration unit includes a dirty air inlet, a filtered air outlet, and a filter chamber disposed fluidly between the dirty air inlet and the filtered air outlet, the filter chamber housing a filter element. The dirty air inlet is positioned vertically below the filter chamber.