According to the invention, there is provided a positive pressure vent for a vehicle. The vent includes an inlet chamber having an air intake port facing into an air stream generated by motion of the vehicle so as to collect air and form a positive pressure inside the inlet chamber. There is further provided a filter adapted to filter air from the inlet chamber of particulate matter. A filtered air path is further provided for allowing filtered air from the filter to travel to the interior of the vehicle under the urging of the positive pressure from the inlet chamber.

A ventilation system for an interior room is provided, having a first air suction device, a second air suction device, a suction volume control device, a first air conduction pipe, a second air conduction pipe, a vacuum generating device and a control unit. The suction volume control device affects an air flow from the first and the second air suction device to the first and the second air conduction pipe, respectively, wherein the control unit controls the suction volume control device so that the air flow from the first air suction device to the first air conduction pipe is controllable.

An HVAC system for a vehicle includes a control unit for controlling the HVAC system and an air recirculation unit controlled by the control unit that is operable in an automatic mode and a manual mode. In the automatic mode, the air control unit is operable to determine if a sunroof is applied to the vehicle, determine if the control unit can determine whether the sunroof is open or closed, determine if the sunroof is open or closed, and change an operating condition of the air recirculation unit in the automatic mode from a first operating level to a second operating level if the sunroof is determined to be open.

A riding vehicle is provided with a downdraft fan assembly mounted on a vehicle roll bar for providing a flow of ambient air over the vehicle operator and a canopy carried by the fan assembly and providing solar and precipitation protection for the operator.

A work vehicle includes a driver section including a driver seat, an air conditioner, and a duct to supply conditioned air from the air conditioner. The air conditioner is below an upper end of the driver seat. The duct includes a vertical portion extending upward from the air conditioner and rearward of the driver seat, and a horizontal portion extending from an upper end portion of the vertical portion to a position forward of the driver in the driver seat in a side view. The duct includes, at a portion forward of the driver, an outlet to blow conditioned air toward the driver.

A work vehicle is provided with a body, a driver section and an air conditioner, and the air conditioner is supported by the body and located on a side of the body.

An air conditioning unit, including: a chamber; a fan, in the chamber, for effecting an entry air entering the chamber and an exit air exiting the chamber; and an evaporative unit, in the chamber, for conditioning the entry air; wherein the fan, together with at least part of the chamber, creates a pressure zone, without ejecting air directly to, or without drawing air directly from, the evaporative unit, such that air moves through the evaporative unit substantially through a pressure effect.

The vent apparatus includes: a transfer duct located inside an upper surface of an interior of a vehicle; a vent located at a portion of the transfer duct; a variable guide located adjacent to the vent; and a driver located at a first end of the variable guide, and configured to apply a driving force to the variable guide and insert the variable guide into a trim, and to change a shape of the variable guide based on the driving force such that a direction of air discharged through the vent is controlled.

The present embodiments relate to an air distribution apparatus for distributing conditioned airflow from a roof mounted air conditioner to the inside of a vehicle, which includes an inlet port adapted to receive the conditioned airflow from the roof mounted air conditioner. An outlet port, which is disposed adjacent to each longitudinal end of the apparatus, delivers conditioned airflow to the vehicle. An internal supply duct is adapted to evenly split the conditioned airflow to the outlet ports.