A heating, ventilation, and air conditioning (HVAC) system for a vehicle may include: a casing having an inlet and a plurality of outlets; an evaporator disposed within the casing; a heater core disposed behind the evaporator within the casing; and an air mixing door disposed between the evaporator and the heater core. In particular, the heater core and a rear wall of the casing are spaced apart from each other by a first distance, the evaporator and the heater core are spaced apart from each other by a second distance, and the first distance is greater than the second distance.

An air-handling system for a motor vehicle includes a conditioning section having an evaporator core and a heater core. The conditioning section is separated into a primary zone and a secondary zone at a position disposed upstream of the heater core. The heater core extends partially into each of the primary zone and the secondary zone. A primary door assembly is disposed within the conditioning section at a position upstream of the heater core and a secondary door assembly is disposed within the secondary zone of the conditioning section at a position downstream of the primary door and upstream of the heater core.

An air handling system of a heating, ventilating, and air conditioning system for a vehicle includes a housing including a mixing and conditioning section. The mixing and conditioning section has an evaporator core and a heater core disposed therein. The heater core is disposed downstream from the evaporator core. A first primary door is disposed intermediate the evaporator core and the heater core. A second primary door is disposed downstream from the heater core.

Systems, methods, and apparatuses are described herein that provide a localized temperature solution to a local temperature issue. Sunloading on one side of a vehicle can create a localized heating issue for an occupant on the same side of the vehicle. An air curtain system on the driver's side of the vehicle can detect high sunloading and then direct airflow onto an interior surface of the vehicle such as a door and window. The airflow provides an ambient cooling solution between the occupant and the sun to mitigate the effects of high sunloading. The air curtain system can receive a further input to redirect airflow away from the interior surface and onto the occupant to provide a direct cooling solution to further mitigate the effects of high sunloading. Other features, including sensors and a control unit, for controlling the air curtain system are described herein.

A system for controlling movements of doors of an HVAC module includes an actuation gear and an intermediate cam. A main door includes a first portion and a second portion having a first guide. The first portion engages with actuation gear to enable linear movement of the main door. A slave door includes a second engagement element and moves between a blocking and unblocking position based on movement of main door. The intermediate cam moves angularly and includes a first engagement element and a second guide. The first engagement element interacts with the first guide, and the second guide interacts with second engagement element to facilitate angular movement of slave door in response to movement of the main door. The first guide includes a bend positioned to enable angular movement of the slave door after the main door moves a pre-determined distance.

A driving force transmission mechanism configuring a vehicular air conditioning device includes: a driving lever coupled to a driving source; a following lever engaged with this driving lever and following this driving lever; and a rack rod engaged with the following lever and moving linearly. A first shaft and a link gear of the following lever are engaged with this rack rod. Moreover, by the driving lever and the following lever revolving under driving action of the driving source, a second shaft engaged with the link gear rotates, and the first shaft rotates via the rack rod. As a result, a first and a second air-mix door engaged with the first and the second shaft slide to undergo an opening/closing operation, and their opening extent characteristics are configured nonlinear under engaging action of a link pin and a link groove of the following lever.

An air conditioning case configuring a vehicular air conditioning device is configured from first through third case sections capable of being divided in a width direction, the third case section in a center in the width direction and the first case section being connected via a first dividing section, and the third case section and the second case section being connected via a second dividing section. Moreover, the first and second dividing sections are formed in such a manner that their lower section sides facing a lower passage divided in a space between an evaporator and a heating unit are positioned on outer sides in the width direction with respect to an upper section of the air conditioning case provided with a vent blast port blasting air into a vehicle interior.

A vehicle air-handling system includes a heat exchanger, a blower in communication with the heat exchanger, and an operable duct having driver and passenger portions that are each in communication with the heat exchanger and the blower. When the blower is activated, the driver portion continuously delivers blower air and the passenger portion selectively delivers blower air.

A rotary shaft assembly includes an outer shaft, an outer opening being formed on a circumferential wall of the outer shaft, and a nested shaft which is rotatably supported within the outer shaft, a nested opening being formed on a circumferential wall of the nested shaft. The nested shaft and the outer shaft are configure to be rotatable with respect to each other about a common axis such that a relative rotation angle between the outer shaft and the nested shaft varies.

An air blowing device has a first blowing portion, a duct, and an airflow causing member. The first blowing portion has a guide surface and is provided with a first blowing outlet that blows air from a blower unit into a vehicle compartment. The airflow causing member defines at least one of a first passage and a second passage located on one side and an other side of the airflow causing member in a front-rear direction of a vehicle respectively in the duct. The airflow causing member sets a first condition in which a high-velocity airflow flows in the first passage and a low-velocity airflow flows in the second passage by decreasing a sectional area of the first passage to be smaller than a sectional area of the second passage. The high-velocity airflow flows along the guide surface and is blown into the vehicle compartment.