A motor-vehicle includes one or more electrically-operated valves, arranged on the structure of the motor-vehicle in a lower position with respect to the windows, for providing a communication between a passenger compartment and the external environment, and one or more electronic control units programmed to activate a ventilation mode of the passenger compartment when the motor-vehicle is parked with the engine off, even with the driver outside the vehicle. The ventilation mode includes controlling at least partial opening of one or more windows and the opening of one or more of the valves to generate a flow of natural air from the bottom upwards through the passenger compartment of the motor-vehicle.

An air filtration system for an operator environment of an agricultural vehicle including 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 where the air filtration 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 a bypass permanently connects the HVAC system blower and the second filtration device.

A blower of an HVAC system includes an air inlet, an air outlet, a blower wheel with blades, a motor operable to cause the blower wheel to rotate, and a blower housing within which the blower wheel is positioned. The blower housing includes a top panel, a bottom panel, and a connecting panel. The top panel and the bottom panel are connected to the connecting panel. The top panel includes a curved edge extending from a bottom edge of the connecting panel to a top edge of the connecting panel. An expansion angle of the curved edge of the top panel changes as a function of position along the curved edge of the top panel. The bottom panel may have a shape corresponding to a mirror image to that of the top panel.

A vehicle air conditioner is disclosed. The present invention provides the vehicle air conditioner, which: can directly control the amount of air passing through an evaporator and a heater core since a blower is disposed between the evaporator and the heater core; has front and rear seat discharge units respectively having heater cores, thereby having a simple form, minimizing energy consumption, and independently enabling four or more zones, including front and rear seats, the left and right of the front seats, and the left and right of the rear seats, to be air-conditioned; and can discharge an offensive smell to the outside during initial driving of a vehicle since the air outside a vehicle, flowing in from an air inlet, and indoor air flowing in from an inside air suction port, disposed at the center of the vehicle, are discharged to the outside of the vehicle by means of a second blower, and not by a front seat blower, for discharging the air to the rear seats.

A front and rear integrated vehicle HVAC system includes a front HVAC portion with a front blower and a front vent outlet, and a rear HVAC portion with a rear blower and a rear vent outlet. The system includes a controller that determines a minimum voltage to be supplied to the rear blower to prevent an inverse air flow from being expelled from the rear outlet and/or a rear blower air intake. A voltage supplied to the rear blower is then set as the greater of the minimum rear blower voltage and a current rear blower voltage. The inverse air flow is air flow in the front HVAC portion generated by the front blower and intended for the front vent outlet that seeps into the rear HVAC portion and is expelled from the rear vent outlet and/or the rear blower air intake.

A vehicle air-conditioning apparatus that exhibits improved energy saving performance is provided. In addition, a vehicle with such a vehicle air-conditioning apparatus is provided. The vehicle air-conditioning apparatus includes a cooler provided in a first air passage, and a first air-sending device including a motor and a fan provided in the first air passage, and configured to drive the fan with the motor to thereby generate an airflow that flows into a vehicle interior through the first air passage. At least a part of an outer surface of the motor is located outside the first air passage.

An air-conditioning system for conditioning air in a vehicle passenger compartment including a housing having a first flow channel and a second flow channel for guiding air, and a refrigerant circulation system having at least two heat exchangers. An air guide device is disposed between the evaporator and the passenger compartment in the first flow channel, and an air guide device is disposed between the condenser/gas cooler and the passenger compartment in the second flow channel. The air guide device disposed in the first flow channel consists of multiple parts such as at least two members, and the members are respectively assigned to air channels extending to the passenger compartment, are independently controllable, and are movable so as to open or close the respective air channels.

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.

An HVAC assembly for a vehicle. The HVAC assembly has an HVAC case with a rear blower and an evaporator. A rear blower scroll directs airflow generated by the rear blower to a lower portion of the evaporator. An airflow conduit is configured to direct airflow generated by a front blower to an upper portion of the evaporator. An airflow divider separates airflow generated by the rear blower from airflow generated by the front blower. The airflow divider divides the HVAC case into an upper area above the divider and a lower area below the divider. A defrost outlet and a front face outlet are at the upper area of the HVAC case above the divider. A front foot outlet and a rear airflow outlet are at the lower area of the HVAC case below the divider.

An HVAC assembly for a vehicle. The HVAC assembly has an HVAC case with a rear blower and an evaporator. A rear blower scroll directs airflow generated by the rear blower to a lower portion of the evaporator. An airflow conduit is configured to direct airflow generated by a front blower to an upper portion of the evaporator. An airflow divider separates airflow generated by the rear blower from airflow generated by the front blower. The airflow divider divides the HVAC case into an upper area above the divider and a lower area below the divider. A defrost outlet and a front face outlet are at the upper area of the HVAC case above the divider. A front foot outlet and a rear airflow outlet are at the lower area of the HVAC case below the divider.