A triple-zone heating, ventilation and air conditioning (HVAC) apparatus for an automotive vehicle may be configured to mix cold air passing through an evaporator and warm air passing through a heat exchanger with each other and blow the mixed air to a front seat foot vent through a front seat foot door and to a rear seat vent through a rear seat door.

An HVAC system for a vehicle includes a housing, an evaporator disposed in the housing, and a heater disposed in the housing. The HVAC system further includes a bypass opening defined between an upper end of the evaporator and an upper end of the heater and an intermediate chamber defined by the evaporator, the heater, the housing, and the bypass opening. The HVAC system further includes an upper outlet passage configured to direct air from the HVAC system into a passenger compartment of a vehicle. The evaporator is configured to output a first stream of air into the intermediate chamber and the HVAC system is configured to operate in a first operating condition in which a first portion of the first stream of air will pass through the heater and a second portion of the first stream will bypass the heater by passing from the intermediate chamber through the bypass opening and into the upper outlet passage.

A rear seat air regulating device includes a housing that has an air inlet formed at one side thereof, a front seat air passage, and a front seat air outlet formed at an upper portion thereof. The housing also has a rear seat air passage and a rear seat air outlet formed at a lower portion thereof. An evaporator and a heater are inside of the housing. A rear seat temperature door is mounted at the inlet of the heater in a manner of being rotated angularly to block or allow the air flowing to the heater. A rear seat mixing door is mounted where an outlet of the heater joins the rear seat air passage in a manner of being rotated angularly so that the mixing door performs opening and closing of the outlet of the heater and opening and closing of the rear seat air passage simultaneously.

An air conditioning case in an air conditioning unit for a vehicle forms a first air passage, a second air passage bypassing the first air passage, and a mixing space connected to a first blowing port and a second blowing port through which air is blown out into a vehicle interior. A cooling heat exchanger cools and allows air to flow into the first air passage and the second air passage. A heating heat exchanger is disposed in the first air passage. A tunnel forming portion provides a tunnel passage into which a part of air from the first air passage flows. The tunnel forming portion includes a first outflow portion connected to the first blowing port, and a second outflow portion connected to the second blowing port, and separates the air flowing in the tunnel passage from the air flowing from the second air passage.

An automobile air vent register is described. The register uses a single set of vanes, a rotating vent cover, and an elongate opening in a configuration providing good air flow control within a limited space.

An air handling system for a heating, ventilation, and air conditioning system of a motor vehicle includes a conduit configured to convey air from the air handling system to a vent of the air handling system. A control door is rotatably disposed in the conduit. The control door selectively rotates between a first position and a second position. The first position blocks passage of the air flowing through the conduit. The second position blocks passage of the air flowing through a first portion of the conduit and allows the air to flow through a second portion of the conduit. A control feature is disposed in the second portion of the conduit to control at least one of a volumetric flow rate and a pressure of the air flowing through the second portion.

To provide a vehicle air-conditioning unit that increases a volume of airflow delivered from a side vent opening in a foot mode, to effectively prevent fogging of windowpanes on right and left end sides. An air passage has: a first passage that guides hot air to a center vent opening, a side vent opening, and a defrost opening; and a second passage that is branched from the first passage and guides the hot air to a foot opening. A first door is arranged at a branched position of the air passage to the second passage, and a second door is arranged between the center vent opening and the defrost opening. In a foot mode, the first door closes the first passage and opens a first supply passage, the first supply passage communicates between the first and second passages, the second door closes the center vent opening and forms a second supply passage on an upstream side of the side vent opening, and the second supply passage communicates between an extending direction of the first supply passage and the side vent opening.

An air inlet system for an automotive HVAC system has a housing comprising a first cylindrical segment enclosing an interior space and having a first radial surface with a first angular divergence. The first radial surface has a fresh air aperture and a recirculation aperture for radially receiving fresh air and recirculated air, respectively. The housing further comprises an outlet body with an exit aperture. A pivoting door element is mounted in the interior space and shaped as a second cylindrical segment with a second radial surface with a second angular divergence which is less than the first angular divergence. The door element has a pivot axis that allows the second radial surface to slide along the first radial surface. The door element pivots to selectably align the opening with the fresh air aperture or the recirculation aperture in order to 1) block the fresh air aperture without blocking the recirculation aperture, 2) simultaneously block portions of the fresh air aperture and the recirculation aperture, 3) block the recirculation aperture without blocking any of the fresh air aperture, or 4) block the recirculation aperture while blocking only a portion of the fresh air aperture.

A temperature door for an air handling system of a heating, ventilating, and air conditioning system includes a first surface defining a sealing perimeter and a pivoting structure coupled to the first surface and defining an axis. The first surface is configured to pivot about the axis in the housing of the air handling system. A sealing lip is disposed about the sealing perimeter of the first surface and is adapted to engage a corresponding sealing surface of the housing of the air handling system. A pivoting of the first surface about the axis from a sealed position causes a progressive disengagement of the sealing lip from the sealing surface beginning in a location proximate the axis while at least a portion of the sealing lip remains engaged with the sealing surface at a location spaced from the axis.

An automobile air vent register is described. The register uses a pair of rotating vent cover doors and an elongate opening in a configuration providing good air flow control within a limited space. Exemplary methods and structures for controlling and directing airflow are provided.