Vehicular heat management system includes a refrigerant circulation line including a compressor, a high pressure side indoor heat exchanger, a heat pump mode expansion valve, an outdoor heat exchanger, an air conditioning mode expansion valve, low pressure side indoor heat exchanger and a refrigerant-cooling water heat exchanger; an air conditioning mode branch line branched from the refrigerant circulation line and configured to, in an air conditioning mode, form a cooling loop by circulating a refrigerant through the compressor, the high pressure side indoor heat exchanger, the outdoor heat exchanger, the air conditioning mode expansion valve and low pressure side indoor heat exchanger. Heat pump mode branch line branched from the refrigerant circulation line is configured, in heat pump mode to form a heating loop by circulating the refrigerant through the compressor, the high pressure side indoor heat exchanger, the heat pump mode expansion valve and the refrigerant-cooling water heat exchanger.

An air conditioning case defines a warm air passage, a cool air passage, a first space, and a second space therein. The cool air passage is in communication with the first space. The warm air passage is in communication with the first space. The second space is connected to the first space on a side of the first space away from the cool air passage. A case interior member including a tunnel member and a blade is arranged in the first space. The tunnel member includes an upstream-end forming portion and a downstream-end forming portion. The upstream-end forming portion is open to the warm air passage. The downstream-end forming portion is open in a direction away from the upstream-end forming portion. The blade extends from the downstream-end forming portion to both sides along a width direction, and guides the air from the tunnel channel to diffuse along the width direction.

An air conditioner includes an inside condenser, an outside heat exchanger, an inside evaporator, a refrigerant circuit switcher, and an air passage switcher. The refrigerant circuit switcher is configured to switch a layout of the refrigerant circuit to (i) a first circuit during a heating mode such that the refrigerant releases heat at the inside condenser and is decompressed to evaporate at the outside heat exchanger and (ii) a second circuit during a defrosting mode such that the refrigerant releases heat at the outside heat exchanger and is decompressed to evaporate at the inside evaporator. The air passage switcher is configured to switch the air passage to (i) a first passage during the heating mode such that the air passes through the inside evaporator and the inside condenser and (ii) a second passage during the defrosting mode such that the air bypasses the inside condenser.

An HVAC module may include an air path through which air is flowable, an evaporator, and a heater. The evaporator and the heater may subdivide the air path into a main path and a side path. The main path may pass through the evaporator and the heater. The side path may branch off from the main path upstream of the evaporator and may open into the main path downstream of the heater. The side path may be fluidically connected to the main path between the evaporator and the heater. A first valve flap may be arranged in the air path and may be adjustable to a closed position and to an open position. A second valve flap may be arranged in the air path and may be adjustable to a first position, to a second position, and to a third position.

An air-handling system for a heating, ventilation, and air conditioning system of a passenger vehicle is provided that includes a heated air conduit configured to receive a portion of a heated air flow from a heat exchanger in a conditioning section and directly deliver the portion of the heated air flow to a vent in the passenger vehicle. The portion of the heated air flow is separate from an unconditioned air flow, a conditioned air flow, and a remainder of the heated air flow, each of which run from the conditioning section to a common mixing section forming an output air flow. The delivery section distributes the output air flow to a plurality of conduits leading to a plurality of vents in the passenger vehicle.

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.

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 heating, ventilation, and air conditioning (HVAC) system for a vehicle may include a housing, a first heat exchanger, a first door, and a second heat exchanger. The housing may include a first inlet branch, a second inlet branch, and an outlet branch. The first door may be adjacent the first heat exchanger and may move from a first position preventing flow to the first heat exchanger to a second position permitting flow to the first heat exchanger. The second heat exchanger may be positioned downstream of the first heat exchanger.

An air-conditioning unit includes an air-conditioning case including an opening through which air flows, a cooler disposed in the air-conditioning case to cool air flowing to the opening, a heater disposed in the air-conditioning case to heat air flowing to the opening, and an adjusting member disposed to cover the opening and adjusting airflow passing through the opening. The adjusting member is produced separately from the air-conditioning case and includes a first region and a second region. The second region includes a high resistance member giving higher resistance to the airflow than the first region. The first region includes a low resistance member giving lower resistance to the airflow than the second region. The low resistance member is a partition dividing the first region into plural air passing parts through which air flows. The high resistance member is a plate member including a part to interfere the airflow.