Disclosed is an HVAC system configured to reduce noise. The HVAC system includes a door having a first and second end. The door includes an elastomer along the first end and a rotatable member adjacent the second end. The elastomer includes a door touch area. The case defines an internal case portion, external case portion, and a case opening fluidly connecting the internal and external case portion. The case is configured to receive the rotatable member of the door such that the door is rotatable about an axis between a first position, where the door covers the case opening, and a second position, where the door does not cover the case opening. The case includes a case touch area with a graining. The door touch area and the case touch area are substantially parallel and in contact along a surface contact area when the door is in the first position.

A ventilation device may include a housing, a fluid channel system, a heat exchanger, and a slider arrangement. The slider arrangement may include at least one first slider and at least one second slider arranged within the fluid channel system upstream of the heat exchanger and downstream of the heat exchanger respectively. The first and second slider may be guidable transversely with respect to at least one fluid flow. The first and second slider may each be actuatable. At least one of a volume flow and a mass flow of at least one fluid flow may be at least one of controllable and regulatable via actuation of the first slider. At least one of a predetermined fluid temperature and a predeterminable fluid temperature of a mixed fluid may be settable and at least two fluids may be mixable via actuation of the second slider.

A vehicle HVAC noise control system includes an air handler, a blower motor, an audio event device and a controller. The air handler is connected to a passenger compartment. The blower motor is operably connected to the air handler to provide a plurality of airflow rates for air flowing into a passenger compartment. The audio event device produces an audio event to the passenger compartment. The controller is operatively connected to the blower motor and the audio event device. The controller controls operation of the blower motor initially at an operating airflow rate and subsequently switches to a noise reducing airflow rate in response to a signal from the audio event device indicating that the audio event device will subsequently produce the audio event.

An HVAC system for use with an operator cab of a work vehicle is characterized by an air duct arrangement in communication with a first fan outlet and second fan outlet. At least one air flow diverter is positioned within the air duct arrangement for selectively diverting air flowing through the air duct arrangement. During a “fresh air filter regeneration” mode the at least one air flow diverter closes the air duct arrangement, the first fan is activated, and the second fan is deactivated, whereby discharge air from the first fan flows through the second fan in a reverse direction and flows through the fresh air filter.

Various disclosed embodiments include illustrative door assemblies, vehicles, and methods of assembling door assemblies. In an illustrative embodiment, a seat includes a base section, a back section, a first section of duct, and one or more vents couplable to the first section of duct. The first section of duct is configured to receive air from an air supply source and the first section of duct is disposed at least partially within the base section. The one or more vents are disposed at an aft surface of a section chosen from the base section and the back section.

Described herein is an air intake device for an air conditioning unit of a vehicle, the air intake device including a casing on which there are formed a fresh air inlet, a recirculation air inlet, and an air outlet adapted to be associated to an air inlet of a blower of the air conditioning unit, and a pair of drum flaps mounted to the casing and rotatable about a common rotation axis and movable between a fresh air extreme position and a recirculation extreme position. In the fresh air extreme position, the angular span of the recirculation air inlet is partially covered by one of the drum flaps and partially covered by the other of the drum flaps, and in the recirculation extreme position, the angular span of the fresh air inlet is completely covered by one of the drum flaps, the drum flaps overlapping each other.

An air vent for thermally controlling the temperature in the cabin of a vehicle. The air vent includes an air mover and a plurality of thermal control channels. Each thermal control channel of the plurality of thermal control channels includes a magnetocaloric material. Further, the air vent includes a magnet for inducing a changing magnetic field in the magnetocaloric material, as well as a vent damper downstream of the plurality of thermal control channels. The vent damper is configured to selectively direct airflow from the air mover and divert air from at least one thermal control channel to a vent space and air from at least one other thermal control channel to a regulated temperature space.

A vehicle cabin airflow forming device includes an airflow forming unit. The airflow forming unit is configured to form airflows circulating around seating space of a seat and form, as part of the airflows, an ascending airflow on one lateral side of the seating space, and a descending airflow on the other lateral side of the seating space. The seat is provided inside a vehicle cabin, and the airflows circulate around the seating space as viewed from a front side of the seat.

A smart multi-modal vehicular air filtration management system including a first filter element and a second filter element disposed in a fresh air housing, wherein the fresh air housing has an inlet and an outlet. Additionally, a third filter element is provided which is disposed in a cabin housing, the cabin housing having one or more inlet. A fluid channel arranged between the fresh air and cabin housing. Finally, a diverter is included which is disposed near an outlet of the fresh air housing, wherein the diverter is configured to cause air to flow through the fresh air housing selectively through one or both of the first filter element and the second filter element.

A blower unit includes a casing defining a first passage and a second passage, a first internal-external air switching member, a second internal-external air switching member, and a partition defining an opening. During a two-layer internal/external air mode, the first internal-external air switching member opens an external air inlet and closes an internal air inlet and the second internal-external air switching member closes the external air inlet and opens the internal inlet, so that the external air is directly introduced into the first passage through the external air inlet and the external air in the second passage is introduced into the first passage through the opening of the partition and the internal air is directly introduced into the second passage through the internal air inlet and the internal air in the first passage is introduced into the second passage through the opening of the partition.