Automotive air conditioning

Abstract

Motor vehicle air conditioning system (1), comprising - a blower (2), - preferably a refrigerant evaporator (3), - a heating device (4), - a housing (6), - wherein the motor vehicle air conditioning system (1) is arranged in an aggregate compartment (10) within a separating housing (7) for separation from the aggregate compartment (10) in front of an end wall (19) of a motor vehicle, characterized in that a space (8) between the housing (6) and the separating housing (7) forms at least one air duct (9) of the motor vehicle air conditioning system (1) for the passage of air and / or the space (8) forms a thermal buffer zone (42).

Description

[0001] The invention relates to a motor vehicle air conditioning system according to the preamble of claim 1 and a motor vehicle.

[0002] Automotive air conditioning systems are used to supply cooled and / or heated air to the interior of a motor vehicle. A fan, a refrigerant evaporator, and a heater are generally located within a housing of the automotive air conditioning system. Due to specific vehicle dimensions, it may be necessary for the automotive air conditioning system to be installed in front of the vehicle's front wall within the engine compartment, rather than behind a bulkhead separating the engine compartment from the vehicle interior.

[0003] DE 10 2004 011 523 A1 discloses an assembly unit for installation in a body, in particular a vehicle body. The assembly unit serves to accommodate components and is arranged in front of a bulkhead separating the engine compartment and the vehicle compartment. An air conditioning system is also provided as an installation in the assembly unit.

[0004] DE 196 51 669 C1 discloses an air intake device of a heating or air conditioning system located in front of the bulkhead of a motor vehicle, with a fresh air inlet and a fan in a bulkhead cutout provided in the bulkhead.

[0005] The object of the present invention is therefore to provide a motor vehicle air conditioning system arranged in an aggregate compartment within a separating housing, in which the interior space within the separating housing outside a housing of the motor vehicle air conditioning system can also be used for the motor vehicle air conditioning system and thus little installation space is required for the separating housing in the aggregate compartment.

[0006] This object is achieved with a motor vehicle air conditioning system, comprising a fan, preferably a refrigerant evaporator, a heating device, a housing, wherein the motor vehicle air conditioning system is arranged in an aggregate compartment within a separating housing for separation from the aggregate compartment in front of an end wall of a motor vehicle, wherein a space between the housing and the separating housing completely or partially forms at least one air duct of the motor vehicle air conditioning system for passing air through and / or the space forms a thermal buffer zone.

[0007] The space between the housing and the separating housing can therefore also be used as an air duct for the passage of air. This means that this space is used for the vehicle air conditioning system, so that the housing of the vehicle air conditioning system and thus also the separating housing can be made smaller. This means that less space is required for the separating housing within the component compartment, in particular in the engine compartment. The air duct in the space can also be used to mix recirculated air and fresh air, as well as to transfer heat from the fresh air and / or recirculated air to the refrigerant evaporator or vice versa, and to transfer heat from the heating device to the fresh air and / or recirculated air in the air duct between the housing and the separating housing.This means that the space between the housing and the separating housing has additional functions for the vehicle air conditioning system, so that the installation space for the separating housing can be further reduced.

[0008] The separating housing also protects the vehicle air conditioning system from harmful environmental influences within the assembly compartment, such as water, moisture, and dust, so that the interior of the separating housing represents a dry space. This allows components suitable for interior use, such as electrical components without increased moisture protection, to be used in or on the vehicle air conditioning system. Furthermore, in hybrid vehicles or electric vehicles, the vehicle air conditioning system must be operated in the high-voltage range, e.g., with voltages of more than 40 V, 60 V, or 300 V. Here, the separating housing also serves to electrically insulate the vehicle air conditioning system from the environment within the assembly compartment, advantageously eliminating the need for complex electrical insulation of the electrical high-voltage components of the vehicle air conditioning system.The wall of the separating housing can be provided with electrical and / or thermal insulation. The insulation is preferably integrated into the wall of the separating housing. The separating housing also insulates the vehicle air conditioning system against moisture and extreme temperature fluctuations, and also acts as a sound insulator, reducing the amount of noise emitted by the vehicle air conditioning system into the environment. Since the space between the housing and the separating housing also serves as an air duct, it also eliminates the need for walls to create air ducts in the housing of the vehicle air conditioning system.

[0009] In particular, at least one air filter is arranged in the space between the housing and the separating housing. Due to the arrangement of the air filter in the space between the housing and the separating housing, which forms at least one air duct, no additional space is required within the housing of the motor vehicle air conditioning system to accommodate the air filter. This allows the installation space of the housing of the motor vehicle air conditioning system to be reduced, thus saving additional space within the engine compartment.

[0010] In a further embodiment, at least one air guiding device, in particular an air flap, is arranged in the space between the housing and the separating housing. Due to the arrangement of at least one air guiding device in the space between the housing and the separating housing as an air duct, installation space for the air guiding device can also be saved in a similar manner.

[0011] In a supplementary embodiment, the at least one air guiding device, in particular as a fresh and / or recirculated air flap, serves to control the fresh and recirculated air portion of the air supplied to a vehicle interior.

[0012] Preferably, at least one wall of the separating housing is a wall for separating the component compartment from the interior of the separating housing, in particular the space between the housing and the separating housing, and / or at least one wall of the separating housing is part of the end wall and / or at least one wall of the separating housing is an outer wall of a motor vehicle. The end wall as well as an outer wall of the motor vehicle can thus be used as the wall of the separating housing. This requires less installation space for the separating housing because the separating housing can, for example, be directly connected to the end wall and / or the outer wall of the motor vehicle, e.g., a hood.

[0013] In one variant, the refrigerant evaporator and / or the fan and / or the heating device and / or at least one air filter are arranged within the housing.

[0014] The heating device is expediently an electrical resistance heating device and / or the heating device is a heat exchanger through which coolant of an internal combustion engine flows.

[0015] In a further embodiment, the end wall has at least one inlet opening for supplying air from the motor vehicle air conditioning system into the vehicle interior. The end wall can have multiple inlet openings or a single large inlet opening, and this large inlet opening is partially covered by the motor vehicle air conditioning system. Inlet openings are formed within the motor vehicle air conditioning system to supply air separately, for example, to the windshield and / or the dashboard and / or the footwell.

[0016] In particular, the at least one air guiding device, in particular as a windshield flap and / or dashboard flap and / or footwell flap, serves to control the air directed into the vehicle interior through the at least one inlet opening. The windshield flap controls and / or regulates the amount of air directed through an inlet opening for the windshield. This allows the amount of air directed to the windshield, in particular for defrosting the windshield, to be controlled and / or regulated. This also applies analogously to the dashboard flap and the footwell flap.

[0017] In a further embodiment, the end wall has at least one outlet opening for discharging air as recirculated air from the vehicle interior into the motor vehicle air conditioning system.

[0018] In a supplementary variant, an air inlet opening is oriented on the outside of the motor vehicle in the direction of travel of the motor vehicle. If the air inlet opening is oriented at least partially, in particular completely, in the direction of travel of the motor vehicle, the airstream blows the ambient air into the air inlet opening, so that less fan power is required while the motor vehicle is moving and the energy required to operate the fan can be reduced. The air inlet opening can also be arranged on a bumper, a hood, a radiator grille, an underbody, a wheel arch or a floor area of ​​a motor vehicle. The fresh air from the air inlet opening can preferably be guided to the housing through a fresh air duct.

[0019] In a further variant, the motor vehicle air conditioning system has a water separator and the water separator is arranged in the direction of air flow upstream of the space between the housing and the separating housing and / or the water separator is arranged in the direction of air flow upstream of the at least one air guiding device for controlling the fresh and recirculated air portion of the air supplied to the vehicle interior.

[0020] The fresh air is conveniently redirected in a fresh air duct for water separation.

[0021] In particular, the heat transfer coefficient of at least one housing wall of the housing is greater, in particular 2, 3, 5, 10 or 20 times greater, than the heat transfer coefficient of at least one wall of the separating housing and / or a wall of the separating housing comprises thermal and / or electrical insulation.

[0022] In a further embodiment, the wall of the separating housing is at least partially provided with thermal and / or electrical insulation. Thermal insulation can reduce heat and cold losses, particularly into the engine compartment. Electrical insulation can electrically insulate the automotive air conditioning system during operation at high voltage, for example, a voltage of at least 40 V, 200 V, or 300 V.

[0023] In a further embodiment, heat from the heating device can be conducted through at least one housing wall of the housing to the air in the room to heat the air before it is introduced into the housing and / or heat from the air in the room can be conducted through at least one housing wall of the housing to the refrigerant evaporator to cool the air before it is introduced into the housing. The housing wall has a low heat transfer coefficient. This allows heat to be conducted through the housing wall to a greater extent, so that the space between the housing and the separating housing can also be used to heat and / or cool the air located there. This means that already pre-tempered air is sucked in by the fan and the room is thus put to additional use in addition to being a mixing space for fresh air and recirculated air.Due to the high heat transfer coefficient of at least one wall, in particular all walls of the separating housing, the motor vehicle air conditioning system is thermally insulated from the component compartment within the separating housing, thus saving energy. For example, at high temperatures, the motor vehicle air conditioning system essentially does not heat up due to waste heat from components within the component compartment, and thus no unnecessary energy expenditure is required to cool the air due to the waste heat from the components. Thus, in addition to protecting against harmful environmental influences, such as moisture, dust, odors, or dirt, the separating housing also serves as thermal insulation, essentially thermally separating the motor vehicle air conditioning system from the component compartment.

[0024] Motor vehicle according to the invention, in particular a passenger car, with a motor vehicle air conditioning system, wherein the motor vehicle air conditioning system is designed as a motor vehicle air conditioning system described in this patent application.

[0025] In a supplementary embodiment, the heat transfer coefficient of at least one wall of the separating housing is less than 20, 10, 5, 3, 2, 1 or 0.5 W / m 2 *K.

[0026] In a supplementary embodiment, the heat transfer coefficient of at least one housing wall of the housing is greater than 30, 20, 10, 5, 3, 2 or 1 W / m 2 *K.

[0027] In the following, exemplary embodiments of the invention are described in more detail with reference to the accompanying drawings. They show: Fig. 1 a longitudinal section of a motor vehicle air conditioning system in a separating housing in a first embodiment, Fig. 2 shows the longitudinal section of the motor vehicle air conditioning system in the separating housing in a second embodiment, Fig. 3 shows the longitudinal section of the motor vehicle air conditioning system in the separating housing in a third embodiment, Fig. 4 shows the longitudinal section of the motor vehicle air conditioning system in the separating housing in a fourth embodiment and Fig. 5 the longitudinal section of the motor vehicle air conditioning system in the separating housing in a fifth embodiment.

[0028] A motor vehicle air conditioning system 1 serves to heat and / or cool air to be supplied to a vehicle interior 27. The motor vehicle air conditioning system 1 has a refrigerant evaporator 3 for cooling the air and a heating device 4 designed as an electrical resistance heating device 5, in particular a PTC heating device, for heating the air. Within a housing 6 of the motor vehicle air conditioning system 1, in addition to the refrigerant evaporator 3 and the electrical resistance heating device 5, a fan 2 is also arranged. The fan 2 is driven by an electric motor (not shown). Furthermore, the motor vehicle air conditioning system comprises a refrigeration circuit with a compressor and a refrigerant condenser. The refrigeration circuit is in Fig. 1 not shown, only the refrigerant evaporator 3.

[0029] The motor vehicle air conditioning system 1 is configured within a separating housing 7 in an assembly compartment 10 designed as an engine compartment 11. An assembly 30, in particular an internal combustion engine or electric motor 31, is arranged in the engine compartment 11, for example. In addition, further assemblies 30, such as a transmission or a battery, can also be arranged in the assembly compartment 10. A wall 18 of the separating housing 7 is formed by walls 18 that are provided exclusively for forming the separating housing 7, as well as by walls 18 that serve as the outer wall 20 of the motor vehicle, and as the end wall 19. The separating housing 7 or the walls 18 of the separating housing 7 are provided with thermal and / or electrical insulation 35. The end wall 19 serves to separate the vehicle interior 27, for accommodating persons, from the assembly compartment 10.

[0030] An air duct 9 for conducting air is formed within the housing 6. Furthermore, an air duct 9 is also formed in a space 8 between the housing 6 of the motor vehicle air conditioning system 1 and the separating housing 7 or walls 18 of the separating housing 7. An air inlet opening 29 opens into the space 8 as the air duct 9 in the region of a windshield 28 for supplying fresh air from the surroundings of the motor vehicle (not shown). A part of the space 8 as the air duct 9 thus represents a fresh air duct 33. At the end of the fresh air duct 33, an air guiding device 15 is formed as a fresh air flap 16 and as a recirculation flap 17. The end wall 19 is further provided with an outlet opening 32 for air from the vehicle interior 27, i.e. recirculation air. Through the outlet opening 32 and an adjoining recirculation duct 34, the recirculated air flows into the space 8 between the housing 6 and the separating housing 7 as fresh air and as recirculation duct 33, 34.By means of the air guiding device 15 as a fresh and recirculated air flap 16, 17, it can be controlled whether exclusively fresh air, exclusively recirculated air or a mixture of fresh air and recirculated air is introduced into the fresh and recirculated air duct 33, 34 above an air filter 12. The air fed into the fresh and recirculated air duct 33, 34 flows through the air filter 12, then through a housing opening (not shown) in the housing 6 to the fan 2 and is then guided by the latter through the refrigerant evaporator 3 and the electrical resistance heating device 5. The fan 2 sucks in the air axially, so that due to the sectional view in . Fig. 1 the housing opening for introducing air into the housing 6 is not shown.

[0031] The housing walls of the housing 6 have a high heat transfer coefficient, allowing heat to be effectively conducted through the housing walls of the housing 6. The air located in the fresh and recirculated air ducts 33, 34 above the housing 6 can thus be cooled by the refrigerant evaporator 3 and heated by the electrical resistance heating device 5 before the air is passed through the housing opening 35 to the fan 2. Thus, the space 8 between the housing 6 and the separating housing 7, in addition to its function as a mixing space for fresh air and recirculated air, also serves as a pre-tempering space for the air to be supplied to the motor vehicle air conditioning system 1.

[0032] The end wall 19 is provided with an inlet opening 21 for a footwell, an inlet opening 22 for a dashboard 37 and an inlet opening 23 for the windshield 28. Air from the motor vehicle air conditioning system 1 is supplied to a footwell within the vehicle interior through the inlet opening 21, air from outlet openings (not shown) in the area of ​​the dashboard 37 is supplied to the vehicle interior 27 through the inlet opening 22 and air is supplied to the vehicle interior 27 in the area of ​​the windshield 28 through the inlet opening 23, in particular for defrosting the windshield 28. A footwell flap 24 is arranged at the inlet opening 21, a dashboard flap 25 at the inlet opening 22 and a windshield flap 26 at the inlet opening 23. The amount of air which is fed through the inlet opening 21 into the footwell of the vehicle interior 27 is controlled and / or regulated by means of the footwell flap 24.This applies analogously to the instrument panel flap 25 and the windshield flap 26. The fresh air drawn in through the air inlet opening 29 and / or the recirculated air drawn in through the outlet opening 32 is thus, after passing through the air filter 12, the refrigerant evaporator 3, and the electric resistance heating device 5, fed in a controlled and regulated manner through the inlet openings 21, 22, and 23 and adjoining ducts and air outlets (not shown) to the vehicle interior 27. A water separator (not shown) is also formed in the area of ​​the air inlet opening 29.

[0033] In a further embodiment, not shown, the motor vehicle air conditioning system 1 can also have other arrangements. The in the first, in Fig. The air filter 12 arranged in the embodiment shown in Figure 1 can be arranged in addition to the horizontal orientation according to Fig. 1 can also be oriented vertically or positioned at an angle to the horizontal, for example, at an angle of 30° or 45°. The design of the air guiding device 15 as a fresh air and / or recirculated air flap 16, 17 can be designed differently than in the first exemplary embodiment. The fresh air and recirculated air flaps 16, 17 can also be subjected to air flow from the side or from below. The horizontal axis of rotation of the fresh air and recirculated air flaps 16, 17 designed in the first exemplary embodiment can also be oriented differently; for example, a vertical axis of rotation can be present in addition to the horizontal axis of rotation. Furthermore, it is possible to arrange an air filter 12 inside the housing 6 of the motor vehicle air conditioning system 1 in addition to or as a replacement for the air filter 12 outside the housing 6, for example, in the direction of air flow between the fan 2 and the refrigerant evaporator 3.

[0034] In Fig. 2 shows a second embodiment of the motor vehicle air conditioning system 1. In the following, essentially only the differences from the first embodiment according to Fig. 1. The space 8 above the housing 6 of the motor vehicle air conditioning system 1 is separated by a fresh air / recirculating air wall 36 into the fresh air duct 33 and the recirculating air duct 34. The fresh air / recirculating air wall 36 also separates the air filter 12 into a fresh air filter 13 and a recirculating air filter 14 and extends to the housing 6. The housing 6 of the motor vehicle air conditioning system 1 has two housing openings 35. One housing opening (not shown) serves exclusively for supplying fresh air, and a second housing opening (not shown) serves exclusively for supplying recirculated air within the housing 6 with the fan 2. Within the recirculating air duct 34, an air guiding device 15 is designed as a recirculating air flap 17, which serves exclusively to control and / or regulate the proportion of recirculated air in the air to be supplied to the vehicle interior 27. Two air inlet openings 29 lead into the fresh air duct 33.A first air inlet opening 29 is arranged in a manner analogous to the first exemplary embodiment in the region of the windshield 28. A second air inlet opening 29 is formed in the region of the outer wall 20 of the motor vehicle and has an air guiding device 15 as a fresh air flap 16. The air inlet opening 29 can be opened and closed by means of the fresh air flap 16. Furthermore, the air inlet opening 29 is aligned in the direction of travel of the motor vehicle when the fresh air flap 16 is in the open position, so that while the motor vehicle is traveling, the airflow flows directly into the air inlet opening 29 and the power of the fan 2 for drawing in fresh air can be reduced.

[0035] In Fig. 3 shows a third embodiment of the motor vehicle air conditioning system 1. In the following, only the differences from the first embodiment according to Fig. 1. The space 8 between the housing 6 and the separating housing 7 is separated by an intermediate wall 38, so that a first sub-space 39 is present, which is formed in the region of the housing 6 with the refrigerant evaporator 3 and the heating device 4, and a second sub-space 40 is present in the region of the housing 6 with the fan 2. The fresh and / or recirculated air sucked in by the fan 2 at the housing opening (not shown) thus reaches exclusively the second sub-space 40. The sucked-in fresh and / or recirculated air does not reach the first sub-space 39. The first sub-chamber 39 serves only as a thermal buffer zone 42 and / or as an insulating volume 42. As a result, a slight temperature difference occurs on the housing 6 in the area of ​​the first sub-chamber 39, because the air in the first sub-chamber 39 is heated by the refrigerant evaporator 3 and / or the heating device 4 depending on the operating mode of the motor vehicle air conditioning system 1, iefor example, cooling or heating operation. At an outside temperature of, for example, -20°C and an air temperature downstream of the heating device 4 of 70°C, a temperature difference of 90°C would occur between the air downstream of the heating device 4 and the fresh air drawn in, provided the fresh air drawn in were to be directed directly past the housing 6 in the area of ​​the heating device 4. Due to the partition wall 38, the fresh air drawn in by the fan 2 does not flow around the housing 6 in the area of ​​the first sub-chamber 39, so that a temperature of approximately 25°C occurs in the first sub-chamber 39 due to heat conduction from the heating device 4 into the first sub-chamber 39. The temperature difference is therefore only approximately 45°C, i.e., half the upper value, and thus the heat conduction through the housing 6 in the area of ​​the first sub-chamber 39 is only half the heat conduction without the partition wall 38.This also applies analogously in cooling operation in which the air in the first sub-space 39 is cooled as a thermal buffer zone 42 or insulating volume 42 by the refrigerant evaporator 3 and thus a smaller temperature difference occurs.

[0036] In Fig. 4 shows a fourth embodiment of the motor vehicle air conditioning system 1. In the following, only the differences from the second embodiment according to Fig. 2. The motor vehicle air conditioning system 1 has a partition 38 in a manner analogous to the motor vehicle air conditioning system 1 in the third exemplary embodiment, so that the space 8 is divided into the first and second sub-spaces 39, 40. The first sub-space 39 is exclusively flowed through by recirculated air introduced through the outlet opening 32. The partition 38 is provided with a partition opening 41. The recirculated air flows through the partition opening 41 into the second sub-space 40, into which the housing opening opens for the intake of air by means of the fan 2. The recirculated air filter 14 is arranged on the pressure side downstream of the fan 2 within the housing 6 and filters the recirculated air in recirculated air mode. In fresh air mode, the air pre-filtered by the fresh air filter 13 is filtered again in the recirculated air filter 14.The temperature of the recirculated air drawn in through the outlet opening 32 is already pre-tempered with respect to the fresh air because the recirculated air has already been heated to approximately 20°C at low outside temperatures, e.g. -20°C. As a result, small temperature differences occur on the housing 6 in the area of ​​the first sub-chamber 39 compared to when fresh air flows around the sub-chamber 39. This also applies analogously at high outside temperatures of e.g. 30°C because the recirculated air has then been cooled to approximately 20°C, for example. As a result, heat conduction can be reduced due to the small temperature difference between the air inside the housing 6 in the area of ​​the first sub-chamber 39 and the air in the first sub-chamber 39, i.e. the recirculated air, and energy can therefore be saved.

[0037] In Fig. 5 shows a fifth embodiment of the motor vehicle air conditioning system 1. In the following, essentially only the differences to the fourth embodiment according to Fig. 4. Fresh air is drawn in through the air inlet opening 29 via a fresh air duct 33 leading through the engine compartment 10 in the region of the front end of the motor vehicle. This allows the dynamic pressure of fresh air to be effectively utilized when the motor vehicle is moving, thus saving electrical energy for operating the blower 2. The pressure-side air filter 12, in the direction of air flow downstream of the blower 2, serves both as a fresh air filter 13 and as a recirculated air filter 14. To reduce heat conduction through the housing 6 in the region of the first sub-chamber 39 into the first sub-chamber 39, only recirculated air enters the first sub-chamber 39 due to the partition wall 38, analogous to the fourth exemplary embodiment.

[0038] Overall, the motor vehicle air conditioning system 1 according to the invention provides significant advantages for the motor vehicle according to the invention. The motor vehicle air conditioning system 1 is arranged in an assembly compartment 10 within a separating housing 7. The separating housing 7, preferably also a component of the motor vehicle air conditioning system 1, protects the motor vehicle air conditioning system 1 from harmful environmental influences within the assembly compartment 10. The space 8 between the housing 6 and the separating housing 7 is also used as an air duct 9, so that the required installation space for the motor vehicle air conditioning system 1 within the assembly compartment 10 can be reduced. List of reference symbols 1 automotive air conditioning system 2 fans 3 refrigerant evaporators 4 Heating device 5 Electric resistance heating device 6 housings 7 Separator housing 8 Space between the housing and the separator housing 9 Air duct 10 Aggregate room 11 Engine compartment 12 air filters 13 fresh air filters 14 recirculation filters 15 Air guiding device 16 Fresh air flap 17 Recirculation flap 18 Wall of the separator housing 19 Front wall 20 outer wall 21 Inlet opening for the footwell 22 Inlet opening for the dashboard 23 Inlet opening for the windshield 24 Footwell flap 25 dashboard flap 26 Windshield flap 27 Vehicle interior 28 Windshield 29 Air intake opening 30 units 31 Combustion engine or electric motor 32 Outlet opening in front wall 33 Fresh air duct 34 Recirculation duct 35 Insulation 36 Fresh air-recirculation wall 37 Dashboard 38 Partition wall 39 First subspace 40 Second sub-space 41 Partition wall opening 42 thermal buffer zone, insulation volume

Claims

[1] Motor vehicle air conditioning system (1), comprising - a blower (2), - preferably a refrigerant evaporator (3), - a heating device (4), - a housing (6), - wherein the motor vehicle air conditioning system (1) is arranged in an aggregate compartment (10) within a separating housing (7) for separation from the aggregate compartment (10) in front of an end wall (19) of a motor vehicle, characterized by that a space (8) between the housing (6) and the separating housing (7) forms at least one air duct (9) of the motor vehicle air conditioning system (1) for the passage of air and / or the space (8) forms a thermal buffer zone (42). [2] Motor vehicle air conditioning system (1) according to claim 1, characterized by that at least one air filter (12, 13, 14) is arranged in the space (8) between the housing (6) and the separating housing (7). [3] Motor vehicle air conditioning system (1) according to claim 1 or 2, characterized bythat at least one air guiding device (15), in particular an air flap (16, 17), is arranged in the space (8) between the housing (6) and the separating housing (7). [4] Motor vehicle air conditioning system (1) according to claim 3, characterized by that the at least one air guiding device (15), in particular as a fresh and / or recirculated air flap (16, 17), serves to control the fresh and recirculated air portion of the air supplied to a vehicle interior (27). [5] Motor vehicle air conditioning system (1) according to one or more of the preceding claims, characterized by that at least one wall (18) of the separating housing (7) is a wall for separating the aggregate space (10) from an interior space of the separating housing (7), in particular the space (8) between the housing (6) and the separating housing (7), and / or at least one wall (19) of the separating housing (7) is part of the end wall (19) and / or at least one wall of the separating housing (7) is an outer wall (20) of the motor vehicle. [6] Motor vehicle air conditioning system (1) according to one or more of the preceding claims, characterized by that the refrigerant evaporator (3) and / or the fan (2) and / or the heating device (4, 5) and / or at least one air filter (12, 13, 14) is arranged within the housing (6). [7] Motor vehicle air conditioning system (1) according to one or more of the preceding claims, characterized by that the heating device (4) is an electrical resistance heating device (5) and / or the heating device (4) is a heat exchanger through which coolant of an internal combustion engine flows. [8] Motor vehicle air conditioning system (1) according to one or more of the preceding claims, characterized by that the end wall (19) has at least one inlet opening (21, 22, 23) for supplying air into the vehicle interior (27) from the motor vehicle air conditioning system (1). [9] Motor vehicle air conditioning system (1) according to one or more of the preceding claims, characterized by that the end wall (19) has at least one outlet opening (32) for discharging air as recirculated air from the vehicle interior (27) into the motor vehicle air conditioning system (1). [10] Motor vehicle air conditioning system (1) according to one or more of the preceding claims, characterized by that an air inlet opening (29) is aligned on the outside of the motor vehicle in the direction of travel of the motor vehicle. [11] Motor vehicle air conditioning system (1) according to one or more of the preceding claims, characterized by that the motor vehicle air conditioning system has a water separator and the water separator is arranged in the direction of air flow upstream of the space (8) between the housing (6) and the separating housing (7) and / or the water separator is arranged in the direction of air flow upstream of the at least one air guiding device (15, 16, 17) for controlling the fresh air and recirculated air portion of the air supplied to the vehicle interior (27). [12] Motor vehicle air conditioning system (1) according to one or more of the preceding claims, characterized by that the heat transfer coefficient of at least one housing wall of the housing (6) is greater, in particular 2, 3, 5, 10 or 20 times greater, than the heat transfer coefficient of at least one wall (18) of the separating housing (7) and / or a wall (18) of the separating housing (7) comprises thermal and / or electrical insulation (35). [13] Motor vehicle air conditioning system (1) according to one or more of the preceding claims, characterized by that heat from the heating device (4, 5) can be conducted through at least one housing wall of the housing (6) to the air in the space (8) for heating the air before it is introduced into the housing (6) and / or heat from the air in the space (8) can be conducted through at least one housing wall of the housing (6) to the refrigerant evaporator (3) for cooling the air before it is introduced into the housing (6). [14] Motor vehicle, in particular passenger car, with a motor vehicle air conditioning system (1), characterized by that the motor vehicle air conditioning system (1) is designed according to one or more of the preceding claims.

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