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 air-conditioning device for vehicle has a case and an outlet unit. The outlet unit has a vent door. The vent door is capable of stopping at a face mode position where a center vent outlet and a side vent outlet are opened, a bi-level mode position where a center vent outlet and the side vent outlet are opened, and a heat mode position where the center vent outlet is closed and the side vent outlet is opened. The vent door is movable from the face mode position to the heat mode position via the bi-level mode position. The case has a fixed guide member. The fixed guide member controls an air flow in the case in the bi-level position by facing the vent door positioned in the bi-level mode position.

In the air conditioning system for a vehicle, when the mode is switched from a bi-level mode in which cold air is blown to a vicinity of a face of a passenger while warm air is blown to a vicinity of a foot to a vent mode in which only the cold air is blown to the vicinity of the face, the time at which the heating damper is started to be closed is delayed relative to the time at which the vent damper is started to be further opened, and the above heat damper is caused to be in a fully closed state in a state where the above vent damper is sufficiently opened. As a result, the heat damper can be operated after the pressure within the air conditioning case is reduced. Therefore, the driving torque of the actuator for driving the heat damper can be reduced.

A vehicular air conditioning system and a control method thereof are provided. The vehicular air conditioning system includes: a plurality of mode doors configured to switch an air discharge mode in a passenger compartment, the mode doors including a defogging door, a vent door and a floor door; and a mode door air pressure reduction part configured to temporarily reduce an air pressure acting on at least one of the mode doors when the air discharge mode is switched.

A heat exchanger, preferably for a vehicle, including an applicative stratification, wherein the applicative stratification includes at least two stratification strands, wherein the applicative stratification is configured in such a manner that when incoming air into the heat exchanger is supplied in the direction of the applicative stratification, the incoming air is spread out by means of the applicative stratification in the respective stratification strand into an associated outgoing air portion. Furthermore, an exemplary embodiment may include an air-conditioning unit and an associated method.

An inlet subassembly for a heating, ventilation, and air conditioning (HVAC) system. The inlet subassembly includes a fresh air inlet and a fresh air door movable to control fresh airflow through the fresh air inlet. The inlet subassembly further includes a recirculation air inlet and a partition defining a first airflow channel and a second airflow channel extending from the recirculation air inlet. A recirculation air door is adjacent to the recirculation air inlet and is movable to a closed position restricting recirculated airflow into both the first airflow channel and the second airflow channel, an open position permitting recirculated airflow into both the first airflow channel and the second airflow channel, and a two-layer position in which the recirculation air door restricts recirculated airflow into the first airflow channel and permits recirculated airflow into the second airflow channel.

Disclosed herein is an air conditioner for a vehicle, which can perform a bleeding function to discharge air to a rear seat floor vent in a rear seat vent mode, and optimize the size of an outlet and the shape of doors to adjust a bleeding amount of a rear seat floor. The air conditioner for a vehicle, which includes an air-conditioning case having an air passageway formed therein, and a heat exchanger for cooling and a heat exchanger for heating which are disposed in the air passageway of the air-conditioning case to exchange heat with air passing the air passageway, includes: a front seat temp door for adjusting the degree of opening between a front seat cold air passageway and a part of a warm air passageway; a first rear seat temp door arranged between the heat exchanger for cooling and the heat exchanger for heating to adjust the degree of opening of another part of the warm air passageway; and a rear seat mode door for adjusting the degree of opening of a rear seat air outlet, wherein the rear seat mode door has a rear seat closing function to close an air flow to a rear seat air outlet, and has a bypass part to bleed some of air.

An air conditioner for a vehicle, which includes an air conditioning case having an air passage formed therein, a cooling heat exchanger provided in the air passage of the air conditioning case to heat-exchange with air passing through the air passage, and a heating heat exchanger, comprises: a front seat temperature door which adjusts an opening degree between a front seat cold air passage and a part of a hot air passage; a first rear seat temperature door which is disposed between the cooling heat exchanger and the heating heat exchanger and adjusts an opening degree of another part of the hot air passage; and a second rear seat temperature door which is disposed in the downstream of the heating heat exchanger and adjusts an opening degree between the hot air passage and a rear seat cold air passage, wherein the second rear seat temperature door includes an asymmetric dome.

A motor vehicle includes a passenger space and a HVAC system. The HVAC system includes a heater, an air conditioner, and ducts configured to heat and/or cool air to the passenger space. The HVAC system is configured to increase humidity of air while the air is flowing through the HVAC system, and to introduce a sanitizing agent into air while the air is flowing through the HVAC system. A controller is configured to actuate the HVAC system to circulate humidified air containing the sanitizing agent through the passenger space to neutralize pathogens that may be present in the passenger space.

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.