Abstract: A heating/cooling control system that can effectively control the temperature of the air discharged at the rear interior of the motor vehicle. The heating/cooling control system includes a front control and a rear control. The front control is capable of operating within a predetermined temperature range. The temperature range of the rear control is determined by the set point of the front control.

Abstract: This invention provides an auxiliary heating and cooling circuit for an automobile interior compartment. The auxiliary circuit uses a circulated liquid heat transfer fluid such as the same liquid used for the vehicle engine system. In a cooling mode, the liquid is circulated through a heat exchanger within the vehicles air-conditioning circuit. The cooled fluid flows to an auxiliary heat exchanger where cooled air is made available. In a heating mode, the auxiliary system is connected directly with the engines cooling system where the hot engine coolant flows through the auxiliary heat exchanger for interior compartment heating.

Abstract: A dual evaporator air conditioning system and method for use therewith to cool air in front and rear portions of a cabin of a vehicle. The dual evaporator air conditioning system includes primary and auxiliary HVAC units to cool the air in the front and rear portions of the cabin, respectively. The dual evaporator air conditioning system also includes a control system having cooling and non-cooling modes for each of the HVAC units. The control system automatically activates a heating element near the auxiliary evaporator in response to the auxiliary HVAC unit being in the non-cooling mode while the primary HVAC unit is in the cooling mode. The heating element heats the refrigerant in the auxiliary evaporator to prevent accumulation of liquid refrigerant and lubricating oil in the auxiliary evaporator when the auxiliary HVAC unit is in the non-cooling mode while the primary HVAC unit is in the cooling mode.

Abstract: The invention recites a multi-zone temperature control system operable to control the temperature within a plurality of compartments. The system includes a scroll compressor operable at a speed to compress a flow of fluid and a condenser, operable to cool the flow of fluid. The system also includes a plurality of heat exchangers. Each heat exchanger is associated with one of the plurality of compartments and is operable to maintain the temperature of the compartment within a desired range. A plurality of valves are operable to direct and vary the amount of the flow of fluid from the compressor to the condenser and the plurality of heat exchangers. The valves are configurable to allow each of the heat exchangers to heat or cool their associated compartment. The system also includes a controller operable to control the valves to maintain the temperature of each compartment within its desired range.

Abstract: In an initial time of a warming-up control of a vehicle air conditioner, a control unit controls a mode switching member to set a foot mode, a first linear bi-level mode, a fixed bi-level mode, a second linear bi-level mode and the foot mode. In the first and second linear bi-level modes, a face-foot air blowing ratio between air blown from a face opening and air blown from a foot opening is gradually changed as the time passes. Therefore, the face-foot air blowing ratio can be smoothly changed in a mode switching between the foot mode and the fixed bi-level mode. Accordingly, when the mode switching is performed in the warming-up control in the winter, the face-foot air blowing ratio is prevented from being suddenly changed.

Abstract: when a front-passenger seat occupant detecting sensor indicates absence of an occupant in a front-passenger seat, an air conditioning control ECU adjusts a temperature measurement measured with a non-contacting temperature sensor for measuring a surface temperature of the occupant in the front-passenger seat and controls air conditioning state around the front-passenger seat based on the adjusted temperature measurement associated with the front-passenger seat.

Abstract: In a vehicle air conditioner including a front automatic air-conditioning unit and a rear manual air-conditioning unit, an air-conditioning control unit changes a correction value of a target air temperature to be blown into a front seat area of a passenger compartment based on an outside air temperature detected by an outside temperature sensor when the rear manual air-conditioning unit operates. Specifically, in a low outside air temperature, the target air temperature for the front seat area is decreased by changing the correction value at a minus side. Accordingly, even a rear heater of the rear manual air-conditioning unit is operated during operation of the front air-conditioning unit, an air temperature blown toward the front seat area in the passenger compartment can be controlled to a set temperature.

Abstract: A multiple zone electronic control system and method are provided to control a heating, ventilation and air conditioning (HVAC) system for a vehicle. The control system includes a plurality of sensors to provide inputs relating to multiple zones of an occupant compartment of the vehicle and a plurality of buttons to provide manual inputs relating to the multiple zones. The control system also includes a plurality of mechanisms to control temperature and flow of air from the HVAC system into the multiple zones. The control system further includes a controller electrically connected to the sensors and the buttons to receive the inputs therefrom and electrically connected to the mechanisms to control the temperature and flow of air into each of the multiple zones.

Abstract: In a method for the control of the strength and the temperature of at least two temperature controlled air flows which serve for the temperature control of at least two corresponding regions of a space and which are generated by making available a cold air flow and a hot air flow whose temperatures can be controlled individually and/or whose strengths can be controlled individually or in combination, by forming in each case a cold air regional part flow and a hot air flow for each of the regions from the cold air flow and the hot air flow, by respective restriction or additional supply of the regional part flows by respectively corresponding, controllable restrictor devices or at least one additional supply device and mixing of corresponding regional part flows for the respective regions, a desired temperature and a desired strength of an air flow to be supplied to the region are set for each of the regions and the strength of the cold air flow and/or of the hot air flow and/or at least one of the restrictor

Abstract: An automotive HVAC unit includes a housing defining a first outlet adapted to connect to HVAC ductwork to provide conditioned air to a first temperature zone, a second outlet adapted to connect to HVAC ductwork to provide conditioned air to a second temperature zone, a third outlet adapted to connect to HVAC ductwork to provide conditioned air to a third temperature zone, and a fourth rear outlet adapted to connect to HVAC ductwork to provide conditioned air to a fourth temperature zone within the vehicle. The HVAC unit further includes an evaporator adapted to cool air passing therethrough, a heater core adapted to heat air passing therethrough, a blower adapted to force air through the evaporator and the heater core, and a modular insert mounted within the housing and being adapted to control the flow of conditioned air to the first, second, third and fourth outlets.

Abstract: An air-conditioning device for a vehicle comprising in a housing (13) a first conduit (20) for transmitting a cool air flow (F1) and a second conduit (22), wherein is installed a heat exchanger (24) for transmitting a warm air flow (F2). The conduits (20, 22) are interposed between an air intake (14) and a mixing zone (31) delivering mixed air. A system splitting (40) the air flows (F1, F2), delivered by the conduits (20, 22) is provided at the junction of the two conduits and in the second conduit (22) downstream of the heat exchanger (24). The splitting system (40) comprises transversely alternating a plurality of cool air passages (46) and a plurality of warm air passages (49). The passages emerge into two separate mixing zones (31, 25).

Abstract: A mode switching control device of a vehicle air-conditioning apparatus capable of selecting vent mode delivery, whereby air is delivered to an upper part of the inside of a passenger compartment; foot mode delivery, whereby air is delivered to a lower part of the passenger compartment; and bi-level mode delivery, whereby the vent mode delivery and the foot mode delivery are implemented together. Even when on the basis of a target outlet temperature foot mode delivery has been selected, when the occupant insolation level is above a predetermined level the control device switches to the bi-level mode to provide the occupant with a comfortable air-conditioning feeling even when the vehicle is running.

Abstract: A dual evaporator air conditioning system and method for use therewith to cool air in front and rear portions of a cabin. The dual evaporator air conditioning system includes primary and auxiliary HVAC units to cool the air in the front and rear portions of the cabin, respectively. The dual evaporator air conditioning system also includes a control system having cooling and non-cooling modes for each of the HVAC units. The control system automatically diverts cooled air produced by the auxiliary HVAC unit into an air dumping chamber in response to the auxiliary HVAC unit being in the non-cooling mode while the primary HVAC unit is in the cooling mode. The air dumping chamber is partitioned from the cabin to prevent the cooled air generated by the auxiliary HVAC unit from entering the cabin. Maintaining airflow through an auxiliary evaporator prevents refrigerant and lubricant buildup in the auxiliary evaporator.

Abstract: A zonal climate control system for a vehicle passenger compartment provides independent outside air mixing for zones behind the operator area. A forward zone climate unit comprises, an air circulation system having an outlet to the vehicle passenger compartment, an inlet from the vehicle passenger compartment, an inlet communicating with an outside environment, a heater core coupled to the engine driven heat source and an evaporator coupled to the engine driven air conditioning compressor. The passenger compartment further includes a rearward zone climate unit, comprising, an air circulation system having an outlet to the vehicle passenger compartment, an inlet from the vehicle passenger compartment, an inlet communicating with the outside environment through the exterior skin of the vehicle, a heater core coupled to the engine driven heat source and an evaporator coupled to the engine driven compressor.

Abstract: Disclosed herewith is an air conditioner housing for automobiles and air conditioner using the same. The air conditioner housing includes a housing body having evaporator and heater core accommodating spaces. Upper and lower air passages are defined by partitioning the inner air passage of the housing body. A front foot vent is formed at the air outlet end of the lower air passage, and defrosting and face vents are formed at the air outlet end of the upper air passage. A front air passage is formed by a guide wall slantingly upwardly extended to partition the space behind the heater core accommodating space, and a rear air passage is formed behind the guide wall to communicate with the upper and lower air passages. A combined door of foot and combination door is positioned on a boundary of the rear air passage and the lower air passage.

Abstract: A multiple zone electronic control system and method are provided to control a heating, ventilation and air conditioning (HVAC) system for a vehicle. The control system includes a plurality of sensors to provide inputs relating to multiple zones of an occupant compartment of the vehicle and a plurality of buttons to provide manual inputs relating to the multiple zones. The control system also includes a plurality of mechanisms to control temperature and flow of air from the HVAC system into the multiple zones. The control system further includes a controller electrically connected to the sensors and the buttons to receive the inputs therefrom and electrically connected to the mechanisms to control the temperature and flow of air into each of the multiple zones.

Abstract: A system for heating and cooling the interior of a motor vehicle is provided which includes a first climate control device designed to heat or cool a front area of the interior, a second climate control device designed to heat or cool a rear area of the interior, a first evaporator connectable to a first cooling agent circuit assigned to the first climate control device and a second evaporator connectable to a second cooling agent circuit assigned to the second climate control device. The second evaporator is located in a latent storage in order to charge the latent storage with cold and the second climate control device contains a first heat exchanger designed to transfer the cold removed via a heat transfer medium circuit or the second cooling agent circuit from the latent storage for cooling the rear area of the interior by an air flow.

Abstract: A defroster/face cool air passage for introducing cooled air from an evaporator to a defroster opening portion and a face opening portion by bypassing a heater core, and a foot cool air passage for introducing cooled air from the evaporator to a foot opening portion by bypassing a heater core, are formed independently from each other. The foot cool air passage is located at sides of the heater core in a vehicle right-and-left direction. The cooled air from the foot cool air passage is mixed with warmed air having passed through the heater core at an inlet of the foot opening portion. Accordingly, pressure loss at a foot mode in an air conditioning unit with a central installation layout is reduced, and a mounting performance on a central portion of a vehicle instrument panel is improved.

Abstract: A motor vehicle cabin has four seat positions and a heating and ventilating apparatus which includes means for producing hot and cold air streams, temperature control means, air distribution ducts having outlets at different points in the cabin at each seat position, and distribution means for adjustably distributing the mixture of the cold and hot air streams between the various air distribution ducts. These ducts include ducts which are open in at least two different points in the rear seat positions, each of which has its own temperature control means for adjusting the air temperature at that position, and means for adjusting the flow of air to that position.

Abstract: An air conditioning system for a vehicle has a first cycle including a compressor, a first condenser, a second condenser, a liquid tank, an expansion valve and an evaporator which are connected through pipes to form a first refrigerant circulation circuit through which a refrigerant flows from an outlet of the compressor to an inlet of the compressor while changing the phase. The first cycle causes the evaporator to act as a cooler when operated. The system further has a second cycle including the compressor, the second condenser, the liquid tank, the evaporator and the evaporator which are connected through pipes to form a second refrigerant circulation circuit through which the refrigerant flows from the outlet of the compressor to the inlet of the compressor while changing the phase. The second cycle causes the condenser to act as a heater and the evaporator to act as a cooler when operated. The first and second cycles are switched by switch means.

Abstract: A system for supplying air to first and second regions of a vehicle passenger compartment, has a first fan, a heater device, and first and second air conduits. The heater device has a first air inlet and outlet for air from the first fan and a second air inlet and outlet for recirculating air within the passenger compartment. The first and second outlets of the heater device supply air through the first and second air conduits to the first and second regions of the said vehicle. The second air conduit is connected to said second air outlet of said heater device via a second fan operable in use to selectively supply air through the second conduit to the second region of the vehicle.

Abstract: A heating and air-conditioning unit includes a heating unit, at least one cold-air duct guided around the heating unit, and air-mixing spaces downstream of the heating unit. At least one partition separates the mixing spaces into which cold and heated air can each be controllably introduced by air-flow control elements. As a result, air which can be temperature-controlled separately, can be supplied to at least two zones. To minimize the structural space occupied by the unit, at least one first partial air stream flows through a first assigned subregion (22VR and 22VL) of the heating unit (22) in a first direction, and at least one second partial air stream flows through a second assigned subregion (22HR and 22HL) of the heating unit (22) in a second direction opposed to the first direction.

Abstract: The invention relates to a heating or air-conditioning system for a motor vehicle, having a heater for generating warm air, at least one cold air duct leading past the heater, and air mixing spaces provided adjacent to the heater. The air duct is divided into sub-ducts for guiding air into the mixing spaces. The mixing spaces are arranged in the direction of flow and are separated from one another by at least one dividing wall. Cold air and warm air are mixed to a specific temperature in the mixing spaces by means of airflow control elements and then fed to an assigned air-conditioned zone via an air duct and air outlet nozzle.

Abstract: The present invention is generally directed towards heating/cooling control system that can effectively control the temperature of the air discharged at the rear interior of the motor vehicle. The heating/cooling control system is provided with a front control and a rear control. The front control is capable of operating within a pre determined temperature range. The temperature range of the rear control is determined by the set point of the front control.

Abstract: This invention provides an auxiliary heating and cooling circuit for an automobile interior compartment. The auxiliary circuit uses a circulated liquid heat transfer fluid such as the same liquid used for the vehicle engine system. In a cooling mode, the liquid is circulated through a heat exchanger within the vehicles air-conditioning circuit. The cooled fluid flows to an auxiliary heat exchanger where cooled air is made available. In a heating mode, the auxiliary system is connected directly with the engines cooling system where the hot engine coolant flows through the auxiliary heat exchanger for interior compartment heating.

Abstract: In an air conditioning apparatus for a vehicle, a first cool air bypass passage is provided at an upper side of a heater core, and a second cool air bypass passage is provided at a lower side of the heater core. Cool air from the first cool air bypass passage and warm air having passed through the heater core are mixed in a first air mixing chamber, and a ratio between an amount of cool air and an amount of warm air is adjusted by an air mixing film member. Further, cool air from the second cool air bypass passage and warm air from the heater core are mixed in a second air mixing chamber, a ratio between an amount of cool air and an amount of warm air is adjusted by an air mixing door, and the second air mixing chamber is provided at an immediately downstream air side of the heater core. Thus, in the air conditioning apparatus, a pressure loss in a ventilation system can be reduced.

Abstract: A distillation system (10) is provided for recovering water from sea water and other polluted water source. The system (10) has a heat engine (12) embodying Carnot cycle and a Rankine cycle formed by heat exchangers (16 and 24), flash evaporator (26) and condenser (32). Burnt gases from the engine (12) such as a jet engine no longer fit for flying are directed into a duct (14) where the exchangers (16) and (24) are located. Sea water is pumped into the heat exchanger (24) for preheating by residue heat in the duct (14) and then into the exchanger (16) for further heating. A recirculating pump (20) raises water pressure in the exchanger (16) for increasing boiling point to about 165° C. The heated water is fed into the evaporator (26) where it changes into vapour and the condensed into water by the condenser (32). The jet air stream is used to create Venturi effect for maintaining sub-atmospheric pressure in the evaporator (26). Any solid left in the evaporator (26) is removed by a transfer mechanism (50).

Abstract: An assembly 10 for controlling the temperature of vehicle seats 16, 18. Particularly, the assembly 10 includes a controller 24 which selectively provides electrical power to heating assemblies 40, 42; and 44, 46 and cooling assemblies 48, 50; and 52, 54 in order to heat or cool the seats 16, 18 in a desired manner while concomitantly obviating the need for high current switches within and/or upon the seats 16, 18. The assembly 10 includes a control panel 28 which allows the temperature of the seats 16, 18 to be automatically or manually controlled in a desired manner.

Abstract: In a vehicle air conditioner, a link mechanism, for connecting one of plural driving devices and one of plural air mixing doors to each other is connected to a hot water valve, and is constructed to be operated to first and second maximum cooling positions. At the first maximum cooling position, the one door connected to the link mechanism is operated to a door maximum cooling position, and the valve is opened. At the second position, the door connected to the link mechanism is operated to the door maximum cooling position, and the valve is closed. Therefore, the valve can be suitably opened and closed in accordance with operation positions of the plural air mixing doors without using a dedicated driving mechanism for the valve.

Abstract: An apparatus (100) controls a temperature of air flow from a temperature control system (10). The apparatus (100) includes a blend door (150), an output gear (140), and a biasing mechanism (124). The blend door (150) blocks air flow and has a plurality of positions, each blocking different amounts of air flow. The blend door (150) is rotatable about a first axis (142) between each of the plurality of positions. The output gear (140) is secured to the blend door (150) and is rotatable about the first axis (142) to rotate the blend door (150) between each of the plurality of positions.

Abstract: The device for generating an air stream comprises means (22, 26) for distributing a main air stream (10) and heating means (20) for producing a hot secondary air stream (42). A modular assembly may be attached into the casing (4) of a heating and/or air-conditioning apparatus (2). This modular assembly exists in at least three versions, suited to the production of an air stream at a set temperature to supply one, two or three regions of the cabin of a motor vehicle. The external bulk of the modular assembly is identical regardless of the number of regions in the cabin for which it is intended. The modular assembly may comprise a support frame (70) and a partition plate (72) attached or incorporated into the support frame and dividing the latter into two parts.

Abstract: The present invention has been made to solve the foregoing problems and it is an object of the present invention to provide a two-layer flow air conditioning system in which a partition wall is installed on a path between an evaporator and a heater core to divide internal air and external air, and a first temperature adjusting door and a second temperature adjusting door each having a fan shape are installed at both sides of the partition wall in such a manner as to be opened at their sides to control the flow direction of the internal air and the external air which are supplied to both sides of the partition wall so as to prevent any mixture between the internal air and the external air, thereby enhancing heating and cooling effects without degrading a defrosting performance.

Abstract: In a vehicle air conditioner having an actuator for driving an air mixing door and mode switching doors, an automatic range and a manual range are set in different operation angle ranges of an operation angle of the actuator. In the automatic range, an air outlet mode is automatically switched in accordance with an opening degree of the air mixing door. On the other hand, in the manual range, a multi-mode or a defroster mode is manually set, regardless of the opening degree of the air mixing door. In the manual range, air is simultaneously blown from all openings such as a face opening, a foot opening and a defroster opening in the multi-mode, and air is blown from the defroster opening in the defroster mode.

Abstract: In a radiant energy heating system having one or more types of radiant energy heating sub-systems, a control system comprising a solid state electronic control panel pre-programmed to control two or more of the types of radiant heating sub-systems, wherein the control panel controls one or more of the types of sub-systems.

Abstract: An air conditioner for vehicles is disclosed. This air conditioner feeds recirculation and fresh air in a separate air feeding or a mixed air feeding using a single intake duct and a single intake control door, thus improving its heating and defrosting efficiency during a heating mode operation, and preventing an undesired discharging of white fogging from the vents during a cooling mode operation by changing its air feeding mode from a recirculation air mode to a fresh air mode. This air conditioner also has a simple construction and is reduced in its production cost.

Abstract: In a vehicle air conditioner, each of cool air outlets is provided at an upper side of each seat at second and third seat lines from a most front seat so that cool air from an air conditioning unit is blown from the cool air outlets toward upper sides of the seats, respectively, and each of warm air outlets is provided at a lower side of each seat at the second and third seat lines so that warm air from the air conditioning unit is blown from the warm air outlets toward lower sides of the seats, respectively. In addition, each of suction ports is provided for each corresponding seat at the second and third seat lines so that air inside a passenger compartment is sucked from the suction ports to be returned to the air conditioning unit.

Abstract: The invention relates to a heating or air-conditioning system and method for ventilating an occupant compartment of a vehicle having a climatic box in which a heat exchanger is accommodated, through which air can flow, and in which at least one air mixing chamber is constructed, which has an air inflow opening for warm air flowing through the heat exchanger and an air inflow opening for cold air flowing around the heat exchanger as well as outlet openings for mixed air, of which at least one outflow opening is arranged on the bottom in the air mixing chamber and at least one outflow opening is arranged on top in the air mixing chamber, and having closing members controlling the opening cross-sections of the inflow openings.

Abstract: A vehicle air conditioning apparatus having two pair of rotatable flow control doors for separately controlling and varying the temperature and flow of air supplied to two different zones of the vehicle interior. Each pair of flow control doors are linked together and operated by a single actuator device.

Abstract: A multi-zone climate control system and method for a vehicle. The system comprises a passenger seat occupancy detector at each of a plurality of passenger seats for generating a respective seat occupancy signal indicative of an occupancy condition of a respective seat. The system also includes a plurality of control units, wherein each of the control units is associated with a respective passenger seat location. The control units are used for selecting desired climate settings for each passenger location. A controller is in operative communication with each control unit and each passenger seat occupancy detector. The controller is operative to control the climate at each occupied passenger location according to the desired climate settings for the respective passenger location and modify the climate at each unoccupied passenger location to optimize the comfort at each occupied passenger location.

Abstract: In an automotive air conditioner, there is provided an air guide arrangement for achieving an effective mixing between cooled air from an evaporator and warmed air from a heater under a bi-level mode. The air guide arrangement is placed in the vicinity of an outlet opening of a warmed air passage extending from the heater. The air guide arrangement forces a warmed air from the outlet opening of the warmed air passage to effectively mix with a cooled air which flows in a direction from the evaporator toward a ventilation air outlet opening.

Abstract: A device for control of an installation for heating, ventilating and/or air-conditioning a vehicle passenger compartment responds to a set-point from a passenger and chosen air-heating parameter values. A control module drives actuators to modify the operation of the equipment of the installation. The device includes a module calculating a comfort temperature for a passenger in the passenger compartment, using the stored values of the chosen parameters and by taking account of the set-point. The control module alters, or does not alter, the operation of the equipment as a function of the comfort temperature which corresponds to the air-heating configuration desired in the passenger compartment.

Abstract: A four zone conditioned air unit for use in a motor vehicle providing heating or cooling to a plurality of regions having relatively independent temperature setting. The structure provides compact, flexible and convenient temperature conditioning for each region.

Abstract: A heat pump type air conditioner for a vehicle has a refrigeration cycle constituted by a compressor, an external heat exchanger, a refrigerant valve unit and an internal heat exchanger unit. The refrigerant valve unit includes first and second flow control valves, and the internal heat exchanger unit includes an auxiliary internal heat exchanger and a main internal heat exchanger. In the refrigeration cycle, the first flow control valve, the auxiliary internal heat exchanger, the second flow control valve and the main internal heat exchanger are serially connected in the order of mention. The main and auxiliary internal heat exchangers change their function between an evaporator and a condenser according to the controlled state of the first and second flow control valve.

Abstract: A heating/air-conditioning device suitable for housing in a vehicle instrument panel includes an evaporator, a heating radiator, an air-distribution means with first and second deflector means, and a blower. The blower sends an airflow through the evaporator and the heating radiator. The evaporator has a principal surface in a first principal plane and the heating radiator has a principal surface in a second principal plane. The evaporator is traversed by the airflow in a first direction substantially perpendicular to the first principal plane. The first deflector means then divert the airflow into a second direction substantially perpendicular to the second principal plane with part of the airflow passing through the heating radiator. The second deflector means then diverts the airflow into a direction substantially parallel to the second principal plane. The air-distribution means diffuses the airflow into a passenger compartment of the vehicle.

Abstract: A vehicle climate control system having a separate control for first and second separate areas of the vehicle. The climate control system includes a three-fluid heat exchanger having a first path with a first inlet and first outlet, and a second path with a second inlet and second outlet. The first path communicates refrigerant between the first inlet and first outlet and the second path communicates coolant between the second inlet and second outlet without the refrigerant and the coolant being mixed. A primary refrigerant loop is interconnected by a refrigerant line with the refrigerant line being connected to the inlet and outlet of the first path. A secondary loop is connected to the inlet and the outlet of the second path such that the coolant flows through the three-fluid heat exchanger to selectively cool or heat the second area of the vehicle by heat transfer within the three-fluid heat exchanger.

Abstract: An air conditioning apparatus for a vehicle includes a front air-conditioning unit for adjusting a temperature of air blown toward a front seat side in a passenger compartment, and a rear air-conditioning unit for adjusting a temperature of air blown toward a rear seat side in the passenger compartment. In the front air-conditioning unit, a ratio between an amount of air passing through a front heater core and an amount of air bypassing the front heater core is adjusted by an air mixing door, and the temperature of air blown toward the front seat side in the passenger compartment is adjusted by the rotation of the air mixing door. On the other hand, in the rear air-conditioning unit, a flow control valve for controlling a flow rate of hot water flowing into a rear heater core is provided, and the temperature of air blown toward the rear seat side in the passenger compartment is adjusted by the flow control valve.

Abstract: In a vehicle air conditioner, during a cooling mode of a refrigerant cycle, refrigerant discharged from a compressor passes through a condenser and flows into a heat exchanger used as an evaporator after being press-reduced in a first press-reducing unit. On the other hand, during a heating mode of the refrigerant cycle, refrigerant discharged from the compressor is directly introduced into the heat exchanger used as a radiator after being press-reduced in a second press-reducing unit, while bypassing the condenser and the first press-reducing unit. During the heating mode or during the cooling mode when outside air temperature is low, a double layer flow mode is set so that outside air flows toward a defroster opening through a first air passage and inside air flows toward a foot opening through a second air passage partitioned from the first air passage. Thus, it can prevent a windshield from being fogged due to vaporization of condensed water on the heater exchanger during the heating mode.

Abstract: According to the present invention, in an air conditioning apparatus setting a double laminar mode in which inside air and outside air are blown while being partitioned, when the maximum heating state (including the high heating capacity close to the maximum heating operation) is set, a warm air bypass door for introducing warm air directly into a foot opening portion, without being mixed into cool air, functions as a movable partition member for partitioning an air passage at a downstream side of a heating heat exchanger, into an inside air passage and an outside air passage. In this way, it is possible to downsize the air conditioning unit.

Abstract: A heating and air-conditioning system for a motor vehicle having a conditioning housing in which at least one heat exchanger is integrated and which has a plurality of air outlet openings for guiding air to front interior zones of the motor vehicle is known. According to the invention, the conditioning housing has a connecting section which is provided with at least one air outlet opening and is intended for connecting to an optionally attachable rear temperature-control unit which, when not utilized can be tightly, in a leak-proof manner, closed by a removable covering part.

Abstract: A system for supplying air to first and second regions of a vehicle passenger compartment, has a first fan, a heater device, and first and second air conduits. The heater device has a first air inlet and outlet for air from the first fan and a second air inlet and outlet for recirculating air within the passenger compartment. The first and second outlets of the heater device supply air through the first and second air conduits to the first and second regions of the said vehicle.