A vehicular air conditioner includes a casing, a blower fan, and a heating heat exchanger. The air passage in the casing is divided into an outside air passage and an inside air passage. The heating heat exchanger is disposed downstream of the blower fan in the casing. The blower fan is disposed to extend over a first outside air space, a second outside air space, a first inside air space, and a second inside air space in the air passage. The rotational direction of the blower fan is set so that each of the plurality of blades of the blower fan passes through the first outside air space, the first inside air space, the second inside air space, and the second outside air space in this order when the plurality of blade are rotating.

Disclosed therein is a dual zone type air conditioner for a vehicle, which includes: an air volume control door mounted between a blower and an evaporator for controlling the degree of opening of first and second passageways so as to control the volume of air blown to the inside of an air-conditioning case; and bypass passageways disposed in the air volume control door to supply a predetermined air volume to a closed passageway even though the air volume control door is at the location to close the first passageway or the second passageway, thereby preventing a sudden change in air volume by widening a control interval of the air volume control door because the first-stage air volume can be realized even though the air volume control door closes one of the air passageways, and reducing a whistle noise by securing a predetermined cross-sectional area of the air passageway through the bypass passageways even though the cross-sectional area of the air passageway gets narrower while the air volume control door closes one of the air passageways.

An automotive HVAC system includes upper and lower mode cases configured to discharge separate streams of temperature-conditioned air into front and rear passenger zones. The system separates the inlet air into separate mixing chambers, and a third stream through a heater core. Blend doors control hot and cold air streams entering their respective mixing chambers. Operation is controlled by reading requested temperature, blower rate and mode for system zone outlet, converting requests to a flowrate, calculating total flowrate as a summation of all requests, employing a math model to calculate total zonal flowrate as a summation of all zonal flowrates, calculating a blower control error as a function of the difference between total blower request and total zonal flowrate, modifying the operating state using the calculated control error, positioning and resetting the mode valves into defrost, heater and vent openings, and resetting the mode valves.

HVAC unit has a single blower fan, an evaporator downstream of the blower and a heater downstream of the evaporator, wherein each zone outlet includes a temperature mixing door for controlling portions of hot and cold air and an output valve for controlling a zonal output flow rate. A method is devised to control the discharge of temperature-conditioned air from a plurality of zone outlets of an automotive HVAC system via such an HVAC unit by the steps of reading an operator-requested zonal discharge blower level for each of the zone outlets; converting each zonal discharge blower level request to a zonal flowrate request; calculating a total requested output flowrate as a summation of all zonal flowrate requests; and adjusting a blower voltage to a minimum voltage required for generating the total requested output flowrate.

An apparatus of multi-air mode for a vehicle air conditioner includes: an air conditioner (HVAC) that is provided in a vehicle and supplies air into the vehicle, an air duct unit in communication with the air conditioner and provided to deliver air supplied from the air conditioner to the inside of the vehicle or to discharge it to the outside of the vehicle, and a multi-air discharge unit in which the air delivered from the air duct unit is discharged into the vehicle.

Described herein is a heating and/or air-conditioning device for a motor vehicle, the device including an inlet duct for the supply of fresh air, an air transmission branch, and an air heating branch, both supplied by the inlet duct and communicating with each other via a mixing zone. A butterfly flap is mounted pivotably around a rotation axis located at the mixing zone. The butterfly flap comprises a first wing associated with a first branch and a second wing associated with a second branch, as well as a wing extension elastically hinged to the first wing according to a hinge axis parallel to the rotation axis of the butterfly flap. Within the first branch are arranged abutment formations suitable to be engaged by the wing extension and to induce, during a rotation of the butterfly flap, a rotation of the wing extension with respect to the first wing.

The invention concerns a control device (1) for a heating and/or ventilation and/or air conditioning installation of a motor vehicle, the installation comprising an air treatment unit (9) comprising air outlets intended to open into a zone (ZG, ZD) of the passenger compartment of the vehicle, including at least first and second air outlets, and at least first (21) and second (23, 25) members for mixing the air flow. According to the invention, the device (1) comprises a user interface (5) comprising at least first (51) and second (53) control members, and a control circuit (7) for receiving, from each control member (51, 53), an input signal with its own temperature setpoint, and for delivering separate control signals for controlling the first and second mixing members (21, 23, 25).

An air outlet of a heating, ventilation, and air conditioning (“HVAC”) system of a vehicle includes a duct and a plurality of primary vanes. The duct has an inlet aperture for receiving an airflow from the HVAC system, and an outlet aperture that is open to a passenger compartment of the vehicle. The plurality of primary vanes are coupled to the duct at the outlet aperture. Each primary vane has an asymmetrical airfoil shape including a leading edge and a trailing edge. The leading edge is disposed within the duct and upstream of the trailing edge.

An air-conditioning system of a motor vehicle may include a fan, an evaporator, and at least one heat exchanger. The evaporator may be arranged downstream of the heat exchanger and may both be arranged in a housing. An air-conditioning system may also include a first bypass duct that bypasses the heat exchanger and a first flap arranged within the first bypass duct. The heat exchanger may be able to be switched off and may be able to be regulated with regard to a heat output of the heat exchanger.

An open architecture HVAC module is disclosed having a housing defining an air inlet and at least two adjacent air outlets. An evaporator and a heater unit are disposed within the housing. A cold air chamber is defined between the evaporator and heater unit, and a hot air chamber is defined downstream of the heater unit. A partition extends into the cold and hot air chambers from an interior surface of the housing between the two adjacent air outlets. The partition is spaced from the evaporator and heater unit. The partition cooperates with the housing to define a first mixing chamber in fluid communication with the first outlet and a second mixing chamber in fluid communication with the second outlet. A blend valve is disposed in each mixing chambers. The blend valves are configured to selectively direct air flow from the cold and hot air chambers to the air outlets.