An air conditioning unit for a vehicle has a casing, a heating heat exchanger, a first partition plate, a first opening, a second partition plate, a second opening, and a switching door. The casing has a face opening and a foot opening. The heating heat exchanger is arranged in the casing. The first partition plate partitions a downstream side of the heating heat exchanger in an airflow direction into a first passage and a second passage located below the first passage. The first opening is formed on a downstream side of the first partition plate in an airflow direction and communicates between the first passage and the second passage. The second partition plate is arranged on the downstream side of the heating heat exchanger and is formed with a third passage between the first partition plate and the second partition plate in the first passage. The second opening that is located on a downstream side of the second partition plate in an airflow direction and communicates between an upper side and a lower side of the second partition plate. The switching door opens or closes the first and second openings. The air in the third passage is guided toward the foot opening by the second partition plate and the switching door in an air conditioning mode in which the switching door opens the first opening and closes the second opening.

A vehicle HVAC system may include a housing, a blower disposed in the housing to blow air, an evaporator core disposed in the housing to cool the air having passed through the blower, a heater core disposed in the housing to increase a temperature of the air having passed through the evaporator core, a temperature door assembly including a pair of slidable temperature door plates to control the air having passed through the blower, and a mode door assembly including a slidable mode door plate to control a vent outlet and a floor outlet such that one thereof is closed, or to control air to be discharged through the vent outlet and the floor outlet.

A vehicle air conditioning system performing individual air conditioning in four zones for left and right spaces of front and rear seats includes a front seat heating, ventilation, and air conditioner (HVAC) separately supplying air having passed through left and right flow paths of a front seat flow path into the left and right spaces of the front seat to perform two-zone individual air conditioning for the front seat. A flow guide is provided in an upstream side space of an evaporator in an internal space of the air conditioning casing of the front seat HVAC to divide the upstream side space of the evaporator to have a left flow path and a right flow path. The flow guide and a side portion of the air conditioning casing opposite to the flow guide have a curved stepped portion in cross-section.

An air-conditioning device for air-conditioning a passenger compartment is provided. The air-conditioning device includes a cooling element for cooling air, an air duct downstream of the cooling element for guiding the air, a heating element downstream of the air duct for warming the air, a mixing zone downstream of the heating element, and multiple air outlets for discharging multiple partial air streams from the mixing zone into different regions of the passenger compartment. An additional cold air bypass is formed which is guided past the heating element for supplying additional cold air downstream of the heating element. As a result, the air-conditioning device in operation is particularly efficient and simultaneously simple in design and particularly cost-effective. Furthermore, the invention provides a method for operating the air-conditioning device.

The invention relates to a motor vehicle heating, ventilation and/or air conditioning device (2) comprising a housing (4) comprising: a duct (14) for distributing a flow of air at foot level in the front of the said vehicle, a first (15) and a second (22) mixing chamber, a dividing flap (32) separating the said mixing chambers (15, 22). According to the invention, the housing (4) has a first opening (17) opening into the first mixing chamber (15) and a second opening (27) opening into the second mixing chamber (22), one on each side of the dividing flap (32), and an assembly cavity near the said duct (14), the said device (2) further comprises: a partition (C) able to close off the first (17) or the second (27) opening according to the mode of operation, and an additional module (200; 300) arranged in the assembly cavity to delimit a canal for the circulation of the flow of air between the first (14) or the second (27) opening and the said duct (14). The invention also relates to a corresponding additional module (200; 300) and to a corresponding method of assembly.

A heater core is disposed to be inclined with respect to an airflow direction so that a first header tank unit is displaced downstream of a second header tank unit in the airflow direction. Therefore, when a first air mixing door blocks a first heating portion, an air stagnates between a downstream lateral portion of the first heating portion and a second partition wall downstream of the first heating portion, and the air is unlikely to be heated downstream of the first heating portion. Likewise, the air is unlikely to be heated upstream of a second heating portion in a second airflow passage. Therefore, a maximum cooling performance of a vehicle air conditioning unit can be restrained from being deteriorated due to a heat from a heater core.

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.

A climate control system having a housing with an air inlet, a cooling element for providing cooled air, a heating element located downstream of the cooling element, a cold air duct for directing cooled air located downstream, a bypass duct for directing cooled air located downstream of the cooling element, a hot air duct for directing heated air, a first mixing chamber for mixing cooled air from the cold air duct and heated air from the hot air duct into blended air, a second mixing chamber located downstream of the bypass duct and downstream of the first mixing chamber for mixing cooled air from the bypass duct and blended air from the first mixing chamber, an air outlet located downstream of the second mixing chamber for delivering air to a passenger compartment, and an air deflector device is located downstream of the bypass duct.

A housing including at least one flow path in fluid communication with a mixing chamber, a windshield air outlet, a windshield air flap, a dashboard air outlet, and a dashboard air flap. A bypass is in fluid communication with the dashboard outlet and configured to conduct a cool air flow around the at least one flow path and the mixing chamber. A flow conduit extends from the mixing chamber to the windshield air outlet. The flow conduit is constructed as one part and comprises a wall enclosing a circumference thereof. The flow conduit extends through the bypass, wherein the warm air flow is separated from a warm air flow through the flow conduit by the wall of the flow conduit. The bypass is formed in a bipartite manner around the flow conduit.

The invention relates to an air-conditioning system, in particular for a motor vehicle, in which a fan takes in air which flows through an evaporator and/or a heater, wherein the fan has arranged downstream of it an air-bypass channel, which contains a bypass damper and guides air past the evaporator. In the case of an air-conditioning system in which the air-mass flow which flows through the air-bypass channel and/or evaporator can be adjusted in a particularly variable manner, an air-throttle element is arranged in and/or on the air-bypass channel and/or upstream or downstream of the evaporator.