Air conditioning for a vehicle

Abstract

Air conditioning system (1) for a vehicle with a passenger compartment, comprising: an air supply duct (10) for supplying air to the passenger compartment, a blower (20) arranged in the air supply duct (10) to generate a blower airflow (LS) for the air supply to the passenger compartment, a cooling device (30) which is arranged in the air supply duct (10) downstream of the blower (20) in order to guide the blower airflow (LS) through the cooling device (30) and thereby to cool and dehumidify to a desired extent, a heating device (40) which is arranged in the air supply duct (10) downstream of the cooling device (30) in order to guide the blower airflow (LS) through the heating device (40) and thereby heat it to a desired extent, a first air outlet (60; 62) which is connected downstream of the heating device (40) to the air supply duct (10) to discharge a first portion (LS1; LS3) of the blower airflow (LS) into the passenger compartment, a second air outlet (61; 63) which is connected downstream of the heating device (40) to the air supply duct (10) to discharge a second portion (LS2; LS4) of the blower airflow (LS) into the passenger compartment, an air guidance device (50) arranged in the air supply duct (10) to divide the blower airflow (LS) into the first and second parts (LS1; LS3, LS2; LS4), and a cooling and heating device (51) which is configured to supply both cooling and heating power to the air supplied to the passenger compartment, wherein the cooling and heating device (51) is arranged downstream of the heating device (40) between the first air outlet (60; 62) and the second air outlet (61; 63), so that the cooling capacity of the cooling and heating device (51) can be supplied to the first portion (LS1; LS3) of the blower airflow (LS) and the heating capacity of the cooling and heating device (51) can be supplied to the second portion (LS2; LS4) of the blower airflow (LS), characterized in that The cooling and heating device (51) comprises a Peltier element arrangement with a cold side oriented such that the first portion (LS1; LS3) of the blower airflow (LS) can pass over it to supply cooling power to the first portion (LS1; LS3) of the blower airflow (LS), and a hot side oriented such that the second portion (LS2; LS4) of the blower airflow (LS) can pass over it to supply heating power to the second portion (LS2; LS4) of the blower airflow (LS), wherein the heating device (40) is arranged in the air supply duct (10) such that, in the case of operation, the entire blower airflow (LS) flows through the heating device (40) and is thereby heated as a whole to the desired extent, and wherein the first air outlet (60) is designed as a defrost air outlet and the second air outlet (61) is designed as a footwell air outlet.

Description

[0001] The invention relates to an air conditioning system for a vehicle designed according to the preamble of claim 1.

[0002] An air conditioning system of the type mentioned above is known, for example, from DE 196 51 279 A1. The cooling and heating unit provided in this air conditioning system is designed as a Peltier element arrangement and is arranged upstream of the blower, the cooling unit, and the heating unit. If an air temperature stratification is desired in this air conditioning system, i.e., for comfort reasons, a lower temperature level in the headroom of the vehicle than in its footwell, this can be achieved by creating a temperature difference at the various air outlets of the air conditioning system via adjustable flow guides and a downstream mixing chamber. These flow guides can influence the mixing of the air flowing through and past the heating unit in such a way that an air temperature stratification, such as...The air conditioning system maintains a lower temperature at the head end of the passenger compartment than at the foot end, as indicated by the various air vents. However, with this type of air conditioning system, achieving this temperature stratification requires a higher temperature level at the heating unit than at the air vents, which can negatively impact the efficiency of the heating unit. Furthermore, such an air conditioning system is limited in terms of the variability of the temperature stratification.

[0003] DE 10 2007 044 466 A1 relates to a heating and / or air conditioning system with Peltier technology for a vehicle, which has a front air conditioning unit with which fresh air from the environment and / or recirculated air from the vehicle interior is drawn in, conditioned and blown into the vehicle interior, wherein in the front air conditioning unit the air conditioning air is passed through an interior heat exchanger and at least partially through a heating heat exchanger.

[0004] From JP 2001 097 038 A, an air conditioning system is known which can be reduced in size and installed in a motor vehicle.The air conditioning system comprises air inlets and air outlets, a heat transfer plate located between the air inlets and the air outlets, equipped with an electronic thermoelectric cooling conversion module and featuring an absorbent film on opposing surfaces, an air switching unit with a separating mechanism that divides the airflow heated / cooled by the heat transfer plate into humid hot air and dry cold air towards the air inlets, and directs the airflow to one air outlet and the other air outlet, and a control circuit that sends the heating / cooling signal to the electronic thermoelectric cooling conversion module and sends the switching signal to the air switching unit synchronously with the heating / cooling signal to the electronic thermoelectric cooling conversion module.

[0005] EP 2 332 758 A1 relates to a vehicle air conditioning system with a main duct for directing an unconditioned airflow into a vehicle interior and at least one thermoelectric element arranged in a cooling section of the main duct such that a cold side of the thermoelectric element is in thermal contact with the airflow through the main duct. To dissipate the heat energy generated on the hot side of the thermoelectric element, the hot side of the thermoelectric element is in thermal contact with an auxiliary duct, while either a coolant or a portion of the unconditioned airflow is passed through the auxiliary duct.

[0006] WO 2012 114 767 A1 relates to a vehicle air conditioning system with an outside air intake for drawing outside air into the cab; and a duct with an inlet for drawing inside air into the passenger compartment and an outlet for blowing air out of the cab. A first internal heat exchanger and a second internal heat exchanger of a heat pump circuit are arranged in the duct. The first internal heat exchanger primarily contributes to heating, and the second internal heat exchanger primarily contributes to cooling. The duct is equipped with a heating outlet to discharge air cooled by the second internal heat exchanger to the outside of the cab during a heating cycle, and / or with a cooling outlet to discharge air heated by the first internal heat exchanger to the outside of the cab during a cooling cycle.The energy required to adjust the air temperature in the cabin can be used efficiently without being wasted.

[0007] The KR 10 2010 0 030 102 A relates to an air conditioning system for a car to independently heat / cool a front seat area and a rear seat area, to accurately control a temperature according to the current direction and amount applied to a console line, and to improve a cooling and heating function of the rear seat area by installing a thermoelectric element module with active reactivity.

[0008] From US patent 2012 / 0011869A1, a vehicle air conditioning system is known comprising an HVAC unit in which a first refrigerant evaporator and a second refrigerant condenser are arranged in an air duct that communicates with a vehicle interior; and a heat pump circuit in which a refrigerant compressor, a refrigerant switching device, a first refrigerant condenser that exchanges heat with the outside air, a first expansion valve and a first refrigerant evaporator are connected in series, and in which the second refrigerant condenser is connected in parallel to the first refrigerant condenser via the refrigerant switching device.A waste heat recovery circuit is connected in parallel to the first expansion valve and the first refrigerant evaporator of the heat pump circuit. This circuit is equipped with a second refrigerant evaporator, located in a ventilation duct leading from the vehicle interior, and a second expansion valve. The invention is based on the objective of designing an air conditioning system according to the preamble of claim 1 in such a way that its means for achieving air temperature stratification do not impair the efficiency of the heating and / or cooling system, and that the air temperature stratification in the passenger compartment can be achieved with greater variability.

[0009] This is achieved with an air conditioning system according to claim 1. Further developments of the invention are defined in the dependent claims.

[0010] According to the invention, an air conditioning system for a vehicle with a passenger compartment comprises: an air supply duct for supplying air to the passenger compartment; a blower arranged in the air supply duct to generate a blower airflow for supplying air to the passenger compartment; a cooling device arranged in the air supply duct downstream of the blower to pass the blower airflow through the cooling device and thereby cool and dehumidify to a desired extent; a heating device arranged in the air supply duct downstream of the cooling device to pass the blower airflow through the heating device and thereby heat it to a desired extent; a first air outlet connected to the air supply duct downstream of the heating device to discharge a first portion of the blower airflow into the passenger compartment;a second air outlet connected to the air supply duct downstream of the heating device to discharge a second portion of the blower airflow into the passenger compartment; an air guide arranged in the air supply duct to divide the blower airflow into the first and second portions; and a cooling and heating device configured to supply both cooling and heating power to the air supplied to the passenger compartment.

[0011] The air conditioning system according to the invention is characterized in that the cooling and heating device is arranged downstream of the heating device between the first and the second air outlet, so that the cooling capacity of the cooling and heating device can be supplied to the first part of the blower airflow and the heating capacity of the cooling and heating device can be supplied to the second part of the blower airflow.

[0012] According to the invention, cooling and heating power can be supplied to the first and second portions of the blower airflow to a desired extent by means of the cooling and heating device arranged between the first and second air outlets. This allows for highly variable air temperature stratification, i.e., a temperature difference at the first and second air outlets of the air conditioning system, which may be desired for comfort reasons. By decoupling the air temperature stratification from the cooling and heating devices, these can operate at their respective optimal operating points and their efficiency is not impaired. In particular, since the cooling and heating power required for the air temperature stratification is supplied to the respective portions of the blower airflow, the heating device can be operated at a lower temperature level, thus ensuring that the overall energy balance of the air conditioning system is not affected.

[0013] In the context of the invention, it should be noted that the first and second components of the blower airflow need not together constitute 100 percent of the total blower airflow, although this is possible. In other words, additional air outlets may or may not be connected to the air supply duct, and the air supply duct (e.g., downstream of the heating element) may or may not branch into different individual air outlets or groups of air outlets.

[0014] In accordance with the invention, it is essential in every case that a portion of the blower airflow can be supplied to each of the two air outlets connected to the air supply duct, wherein a cooling or heating power can subsequently be supplied to the respective portion of the blower airflow of these air outlets by a cooling and heating device arranged downstream of the heating device between these two air outlets, so that a desired temperature difference can be achieved between the two air outlets, resulting in a temperature stratification in the vehicle.

[0015] According to the invention, the cooling and heating device has a Peltier element arrangement with a cold side, which is oriented in such a way that the first part of the blower airflow can be passed over it in order to supply the cooling power to the first part of the blower airflow, and a hot side, which is oriented in such a way that the second part of the blower airflow can be passed over it in order to supply the heating power to the second part of the blower airflow.

[0016] By integrating a Peltier element array into the cooling and heating system, cooling and heating power can be easily provided by supplying electrical energy or current and, if required, controlled or regulated by adjusting the current at the Peltier element array using a control unit. Within the efficiency limits of the Peltier element(s) in the Peltier element array, the cooling power required for cooling is converted into heating power available for heating.

[0017] According to a further embodiment of the invention, the cooling and heating device is designed in a plate-like form, so that the cooling power can be supplied to the first part of the blower airflow via a first plate side of the cooling and heating device, and the heating power of the cooling and heating device can be supplied to the second part of the blower airflow via a second plate side of the cooling and heating device facing away from the first plate side.

[0018] Due to its plate-shaped design, the cooling and heating unit can be easily positioned between the first and second air outlets and can be advantageously used, for example, as a partition.

[0019] According to the invention, the cooling and heating device is integrated into the air guide device, so that a positionally fixed branch is formed in the air supply channel.

[0020] In other words, according to this embodiment of the invention, the cooling and heating device, together with other components of the air guide system or even on its own, can form a fixed branch in the air supply duct that divides the blower airflow into a first and a second portion. This is particularly advantageous if the cooling and heating device is designed in a plate-like form as described above. Thus, since the cooling and heating device is designed as an integral unit with the air guide system, it can achieve both a desired air temperature stratification and the division of the blower airflow into a first and a second portion.

[0021] According to yet another embodiment of the invention, the heating device is arranged in the air supply duct in such a way that, in the event of operation, the entire blower airflow passes through the heating device and is thereby heated as a whole to the desired extent.

[0022] In this embodiment of the invention, the temperature level of the heating device is advantageously lowered to such an extent that the desired final temperature level with corresponding air temperature stratification in the passenger compartment is achieved by the downstream cooling and heating device, thus enabling the heating device to operate with the minimum necessary power. In conjunction with a design of the cooling and heating device as an exceptionally lightweight and precisely controllable Peltier element arrangement, the overall energy balance of the air conditioning system can therefore be further improved.

[0023] According to the invention, the cooling device is arranged in the air supply duct in such a way that, during operation, the entire blower airflow passes through the cooling device and is thereby cooled and dehumidified as a whole to the desired extent.

[0024] This advantageously raises the temperature level of the cooling unit, preferably while maintaining the dehumidification function, to such an extent that the desired final temperature level with corresponding air temperature stratification in the passenger compartment is achieved by the downstream cooling and heating unit, thus enabling the cooling unit to operate with the minimum necessary power. In conjunction with a design of the cooling and heating unit as an exceptionally lightweight and precisely controllable Peltier element arrangement, the overall energy efficiency of the air conditioning system can therefore be further improved.

[0025] According to further embodiments of the invention, the cooling device is designed as a heat-exchanging evaporator of a heat pump system of the vehicle and / or the heating device is designed as a heating heat exchanger supplied with heating power by the vehicle's heat pump system.

[0026] Within the scope of this embodiment of the invention, it was recognized that, particularly in electric vehicles with heat pump systems, the air temperature stratification typically achieved via adjustable flow guides and a downstream mixing chamber, as is customary in the prior art, can reduce the efficiency of the heat pump system due to the higher temperature level required at the heating unit. This creates a conflict between thermal comfort achieved through optimized air temperature stratification and the maximum efficiency of the heat pump system.

[0027] In this conflicting objective scenario, according to current technology, the heating system's temperature can be lowered to such an extent that all air is routed through it. This lower temperature allows the heat pump system to operate at its optimal point. However, the lack of cold air in the mixing chamber prevents temperature stratification, resulting in excessively high headroom temperatures and reduced thermal comfort in the passenger compartment. In the comfort scenario, the heating system is heated to a higher temperature and selectively mixed with cold air from the cooling system to achieve a level of comfort similar to that of a combustion engine vehicle. However, the higher temperature in this scenario reduces the efficiency of the heat pump system and leads to a decrease in the vehicle's range.

[0028] With the solution according to the invention, wherein the cooling and heating device is arranged downstream of the heating device between the first and the second air outlet, so that cooling power from the cooling and heating device can be supplied to the first part of the blower airflow and heating power from the cooling and heating device can be supplied to the second part of the blower airflow, the energy requirement of the air conditioning can be reduced, since the heat pump system can operate at an optimal operating point.

[0029] The inventive design of the cooling and heating unit eliminates the need for a separate, e.g., electric auxiliary heater running parallel to the heat pump system. Specifically, a pulsed switching in the control circuit could convert electrical energy into heat in the air conditioning system without affecting the temperature stratification, thus making the auxiliary heater unnecessary.

[0030] Particularly when the cooling and heating system is implemented with or as a Peltier element arrangement, the air temperature stratification for each operating point can be optimally adjusted by setting the current at the Peltier element arrangement. This can increase thermal comfort. Additionally, it is possible to offer the driver or a passenger in the passenger compartment variable air temperature stratification via a control menu on an input / output interface of the air conditioning control unit, for example, located in the dashboard, thereby increasing user-friendliness and climate control comfort.

[0031] According to the invention, the first air outlet is designed as a defrost air outlet and the second air outlet is designed as a footwell air outlet, and a further first air outlet can be designed, for example, as a side air outlet, and a further second air outlet can be designed, for example, as a defrost air outlet.

[0032] The invention expressly extends to embodiments which are not given by combinations of features from explicit cross-references of the claims, whereby the disclosed features of the invention can be combined arbitrarily with one another - insofar as this is technically sensible.

[0033] The invention will now be described with reference to preferred embodiments and the accompanying figures. Fig. Figure 1 shows a schematic sectional view of a typical air conditioner. Fig. Figure 2 shows a schematic sectional view of an air conditioning system according to an embodiment of the invention. Fig. Figure 3 shows a schematic sectional view of an air conditioning system according to one embodiment of the invention.

[0034] In Fig. Figure 1 shows a typical air conditioning system 1' of a vehicle (not fully shown and not separately labelled) with a passenger compartment shown in a schematic cutaway side view perpendicular to a longitudinal direction of the vehicle.

[0035] The air conditioning 1' according to Fig. 1 has an air supply duct 10' for supplying air to the passenger compartment, a blower 20', a cooling device 30', a heating device 40', an air guide device 50', a first air outlet 60' and a second air outlet 61'.

[0036] The blower 20' is arranged in the air supply duct 10' to generate a blower airflow LS' for supplying air to the passenger compartment. The cooling device 30' is arranged in the air supply duct 10' downstream of the blower 20' to direct the blower airflow LS' through the cooling device 30', thereby cooling and dehumidifying it to the desired extent. The heating device 40' is arranged in the air supply duct 10' downstream of the cooling device 30' to direct the blower airflow LS' through the heating device 40', thereby heating it to the desired extent.

[0037] The first air outlet 60' is connected downstream of the heating unit 40' to the air supply duct 10' to discharge a first portion LS1' of the blower airflow LS' into the passenger compartment. The second air outlet 61' is connected downstream of the heating unit 40' to the air supply duct 10' to discharge a second portion LS2' of the blower airflow LS' into the passenger compartment.

[0038] The air guidance device 50' is arranged in the air supply duct 10' to divide the blower airflow LS' into the first part LS1' and the second part LS2' of the blower airflow LS', so that the first part LS1' has a first temperature level and the second part LS2' has a second temperature level.

[0039] To achieve, for example, a temperature stratification in the passenger compartment for comfort reasons, i.e., a temperature difference between the footwell and headroom, the air guidance device 50' has adjustable flow guide elements 51', 52' (pivoting flow guide flaps) and the air supply duct 10' has a mixing chamber 11' downstream of the flow guide elements 51', 52'. The flow guide elements 51', 52' allow the blower airflow LS' exiting the cooling device 30' to be divided in such a way that a portion of it must flow through the downstream heating device 40' and another portion can bypass the downstream heating device 40'.

[0040] After the heating unit 40', these proportions of only cooled and dehumidified air and additionally reheated air mix in the mixing chamber 11' to an extent that can be influenced by the flow guide elements 51', 52'.

[0041] This makes it possible to ensure that the temperature level of the first portion LS1' of the blower airflow LS' exiting from the first air outlet 60' is lower than the temperature level of the second portion LS2' of the blower airflow LS' exiting from the second air outlet 61', thereby achieving a desired air temperature stratification in the passenger compartment.

[0042] The following will refer to the Fig. 2 and Fig. Three embodiments of an air conditioning system 1 according to the invention for a vehicle (not fully shown and not separately labelled) with a passenger compartment are described. Fig. Figure 2 shows an embodiment of the air conditioning system 1 according to the invention in a schematic, cutaway side view seen transversely to a longitudinal direction of the vehicle. Fig. Figure 3 shows an embodiment of the air conditioning system 1 according to the invention in a schematic cutaway top view seen transversely to the longitudinal direction of the vehicle.

[0043] The air conditioning system 1 according to Fig. 2 has an air supply duct 10 for supplying air to the passenger compartment, a blower 20, a cooling device 30, a heating device 40, an air guide device 50, a first air outlet 60 and a second air outlet 61.

[0044] The blower 20 is arranged in the air supply duct 10 to generate a blower airflow LS for the air supply to the passenger compartment.

[0045] The cooling device 30 is arranged in the air supply duct 10 downstream of the blower 20 in order to guide the blower airflow LS through the cooling device 30 and thereby cool and dehumidify it to the desired extent. More precisely, in the present embodiment, the cooling device 30 is arranged in the air supply duct such that, during operation, the entire blower airflow LS flows through the cooling device 30 and is thereby cooled and dehumidified as a whole to the desired extent.

[0046] The heating device 40 is arranged in the air supply duct 10 downstream of the cooling device 30 in order to guide the cooled and dehumidified blower airflow LS exiting the cooling device 30 through the heating device 40 and thereby heat it to the desired extent. More precisely, in the present embodiment, the heating device 40 is arranged in the air supply duct 10 such that, during operation, the entire blower airflow LS flows through the heating device 40 and is thus heated as a whole to the desired extent.

[0047] In the present embodiment, the cooling device 30 is designed as a heat-exchanging evaporator of a heat pump system (not fully shown) of the vehicle preferably configured here as an electric vehicle, and the heating device 40 is designed as a heating heat exchanger supplied with heating power by the vehicle's heat pump system.

[0048] The first air outlet 60 is connected downstream of the heating device 40 to the air supply duct 10 in order to discharge a first portion LS1 of the blower airflow LS into the passenger compartment, wherein the first air outlet 60 in the present embodiment of Fig. 2 is designed as a defrost air outlet.

[0049] The second air outlet 61 is connected downstream of the heating device 40 to the air supply duct 10 in order to discharge a second portion LS2 of the blower airflow LS into the passenger compartment, wherein the second air outlet 61 in the present embodiment of Fig. 2 is designed as a footwell air vent.

[0050] The air guide device 50 is arranged in the air supply duct 10 to divide the blower airflow LS into a first portion LS1 and a second portion LS2, such that the first portion LS1 has a first temperature level and the second portion LS2 has a second temperature level. More precisely, the air guide device 50 comprises a cooling and heating element 51 and a guide plate assembly 55, which is fixedly mounted inside a housing 12 of the air supply duct 10.

[0051] The cooling and heating device 51 is formed by a plate-shaped Peltier element arrangement with one or more Peltier elements, wherein the cooling and heating device 51 is integrated into the air guide device 50 such that, together with the guide plate arrangement 55, it forms a fixed branch in the air supply duct 10. In other words, the cooling and heating device 51, together with the guide plate arrangement 55, is arranged downstream of the heating device 40 between the first and second air outlets 60, 61 as a fixed branch in the air supply duct 10.

[0052] In detail, the Peltier element arrangement of the cooling and heating device 51 has a first plate side 52, which is oriented such that the first part LS1 of the blower airflow LS can be passed over it in order to supply cooling or heating power to the first part LS1 of the blower airflow LS, and a second plate side 53 facing away from the first plate side 52, which is oriented such that the second part LS2 of the blower airflow LS can be passed over it in order to supply heating or cooling power to the second part LS2 of the blower airflow LS.

[0053] The cooling and heating unit 51 is electrically connected to a control unit 70 for its regulated DC power supply (in Fig. 2 (schematically represented by an arrow pointing to the circled reference symbol 51). The control unit 70 is in turn signal-coupled to a temperature sensor arrangement 80 with one or more sensor(s) (in Fig. 2 (schematically represented by an arrow pointing to the circled reference numeral 80), wherein the temperature sensor arrangement 80 can provide temperature signals to the control device 70 with respect to the passenger compartment temperature, the temperature of the first part LS1 of the blower airflow LS and the temperature of the second part LS2 of the blower airflow LS.

[0054] Depending on the polarity of two power connections (not shown) of the cooling and heating device 51, the control device 70 can cause the first plate side 52 to form a cold side and the second plate side 53 a hot side of the Peltier element arrangement of the cooling and heating device 51, or the first plate side 52 to form a hot side and the second plate side 53 a cold side of the Peltier element arrangement of the cooling and heating device 51.

[0055] In the Fig. In the application shown in Figure 2, the first plate side 52 forms a cold side and the second plate side 53 a hot side of the Peltier element arrangement of the cooling and heating device 51, so that cooling power from the cooling and heating device 51 can be supplied to the first part LS1 of the blower airflow LS and heating power from the cooling and heating device 51 can be supplied to the second part LS2 of the blower airflow LS in order to achieve an air temperature stratification in the passenger compartment, i.e. a temperature difference at the two air outlets 60, 61.

[0056] In the operating case of the air conditioning system 1, according to the present embodiment, the cooling device 30 and the heating device 40, which are part of the heat pump system, can now be operated at their respective optimal operating points, whereby in particular the cooling capacity of the cooling device 30 and the heating capacity of the heating device 40 can be reduced to optimal values.

[0057] During operation, the entire blower airflow LS is cooled and dehumidified to the desired extent in the cooling unit 30. The blower airflow LS exiting the cooling unit 30 is then heated in its entirety to the desired extent in the heating unit 40. The blower airflow LS exiting the heating unit 40 is then divided or branched by the air guide 50 into the first portion LS1 and the second portion LS2. The first portion LS1 of the blower airflow LS flows over the first plate side 52 of the Peltier element arrangement of the cooling and heating unit 51, receiving cooling power or heat transfer. The second portion LS2 of the blower airflow LS flows over the second plate side 53 of the Peltier element arrangement of the cooling and heating unit 51, receiving heating power or heat transfer.

[0058] This makes it possible to ensure that the temperature level of the first component LS1 of the blower airflow LS exiting from the first air outlet 60 is lower than the temperature level of the second component LS2 of the blower airflow LS exiting from the second air outlet 61, thereby achieving a desired air temperature stratification in the passenger compartment.

[0059] To regulate the supply of cooling and heating power, the Peltier element arrangement of the cooling and heating device 51 is controlled by the control unit 70 in such a way that a current at the Peltier element arrangement is changed depending on the temperature signals of the temperature sensor arrangement 80 with respect to the passenger compartment temperature, the temperature of the first part LS1 of the blower airflow LS and the temperature of the second part LS2 of the blower airflow LS in order to achieve a preset target temperature in the passenger compartment while ensuring a desired air temperature stratification.

[0060] For inputting the target temperature of the passenger compartment and the desired air temperature stratification, an input-output interface (not shown) of the control unit 70 of the air conditioning system 1 is preferably provided in a dashboard of the vehicle, so that a driver of the vehicle or a passenger in the passenger compartment can enter and / or select corresponding values ​​in an operating menu of the input-output interface.

[0061] In Fig. Finally, 3 shows an embodiment of the invention which, in addition to the embodiment according to Fig. 2 or alternatively, it can be implemented. For the description of the embodiment according to Fig. 3 is not addressed in Fig. 3 components of the air conditioning system shown on Fig. 2 referred to. Since the embodiment according to Fig. 3. Except for minor differences, identical to the embodiment according to Fig. Since the second stage is trained, only these differences will be highlighted below.

[0062] According to Fig. 3 A first air outlet 62 is connected downstream of the heating device 40 to the air supply duct 10 in order to discharge a first portion LS3 of the blower airflow LS into the passenger compartment, wherein the first air outlet 62 in the present embodiment is Fig. 3 is designed as a side air outlet. In addition, according to Fig. 3 a second air outlet 63 is connected downstream of the heating device 40 to the air supply duct 10 in order to discharge a second portion LS4 of the blower airflow LS into the passenger compartment, wherein the second air outlet 63 in the present embodiment of Fig. 3 is designed as a defrost air outlet.

[0063] It should be noted that in Fig. 3 a mirror-image representation of the first and second air outlets 62, 63 is made, so that in Fig. 3 two pairs of first and second air outlets 62, 63 with air guide device 50 arranged between them are provided.

[0064] According to the embodiment of Fig. 3 forms the first plate side 52 a cold side and the second plate side 53 a hot side of the Peltier element arrangement of the cooling and heating device 51 of the respective air guide device 50, so that a cooling power of the cooling and heating device 51 can be supplied to the first part LS3 of the blower airflow LS and a heating power of the cooling and heating device 51 can be supplied to the second part LS4 of the blower airflow LS in order to achieve an air temperature stratification in the passenger compartment, i.e. a temperature difference at the two air outlets 62, 63 of each pair of air outlets.

[0065] It follows from the foregoing that, according to the invention, the first part LS1, LS3 and the second part LS2, LS4 of the blower airflow LS need not together constitute 100 percent of the blower airflow LS, but this can be the case. In other words, exactly two or more than two air outlets can be connected to the air supply duct 10, and the air supply duct (e.g., downstream of the heating device) may or may not branch into different individual air outlets or groups of air outlets.

[0066] In accordance with the invention, it is essential in every case that a portion of the blower airflow LS can be supplied to each of the two air outlets connected to the air supply duct 10, wherein a cooling power or a heating power can subsequently be supplied to the respective portion of the blower airflow of these air outlets by a cooling and heating device 51 arranged downstream of the heating device 40 between these two air outlets, so that an air temperature stratification, i.e. a desired temperature difference between the two air outlets, can be achieved. Reference symbol list 1'; 1 air conditioner 10'; 10 air supply duct 11' Mixing room 20'; 20 blowers 30'; 30 Cooling unit 40'; 40 heating unit 50'; 50 air guide device 51', 52' Flow guide section 51 Cooling and heating equipment 52, 53 plate side 55 Circuit board arrangement 60', 61' Air vents 60, 61 Air vents 62, 63 Air vents 70 Control unit 80 Temperature sensor arrangement LS'; LS blower airflow LS1'; LS2' Proportion of the blower airflow LS1; LS2 Proportion of the blower airflow LS3; LS4 Proportion of the blower airflow

Claims

[1] Air conditioning system (1) for a vehicle with a passenger compartment, comprising: an air supply duct (10) for supplying air to the passenger compartment, a blower (20) arranged in the air supply duct (10) to generate a blower airflow (LS) for the air supply to the passenger compartment, a cooling device (30) which is arranged in the air supply duct (10) downstream of the blower (20) in order to guide the blower airflow (LS) through the cooling device (30) and thereby to cool and dehumidify to a desired extent, a heating device (40) which is arranged in the air supply duct (10) downstream of the cooling device (30) in order to guide the blower airflow (LS) through the heating device (40) and thereby heat it to a desired extent, a first air outlet (60; 62) which is connected downstream of the heating device (40) to the air supply duct (10) to discharge a first portion (LS1; LS3) of the blower airflow (LS) into the passenger compartment, a second air outlet (61; 63) which is connected downstream of the heating device (40) to the air supply duct (10) to discharge a second portion (LS2; LS4) of the blower airflow (LS) into the passenger compartment, an air guidance device (50) arranged in the air supply duct (10) to divide the blower airflow (LS) into the first and second parts (LS1; LS3, LS2; LS4), and a cooling and heating device (51) which is configured to supply both cooling and heating power to the air supplied to the passenger compartment, wherein the cooling and heating device (51) is arranged downstream of the heating device (40) between the first air outlet (60; 62) and the second air outlet (61; 63), so that the cooling capacity of the cooling and heating device (51) can be supplied to the first portion (LS1; LS3) of the blower airflow (LS) and the heating capacity of the cooling and heating device (51) can be supplied to the second portion (LS2; LS4) of the blower airflow (LS), characterized by , that The cooling and heating device (51) comprises a Peltier element arrangement with a cold side oriented such that the first portion (LS1; LS3) of the blower airflow (LS) can pass over it to supply cooling power to the first portion (LS1; LS3) of the blower airflow (LS), and a hot side oriented such that the second portion (LS2; LS4) of the blower airflow (LS) can pass over it to supply heating power to the second portion (LS2; LS4) of the blower airflow (LS), wherein the heating device (40) is arranged in the air supply duct (10) such that, in the case of operation, the entire blower airflow (LS) flows through the heating device (40) and is thereby heated as a whole to the desired extent, and wherein the first air outlet (60) is designed as a defrost air outlet and the second air outlet (61) is designed as a footwell air outlet. [2] Air conditioning system (1) according to claim 1, wherein the cooling and heating device (51) is designed in a plate-like form, such that the cooling capacity can be supplied to the first portion (LS1; LS3) of the blower airflow (LS) via a first plate side (52) of the cooling and heating device (51) and the heating capacity of the cooling and heating device (51) can be supplied to the second portion (LS2; LS4) of the blower airflow (LS) via a second plate side (53) of the cooling and heating device (51) facing away from the first plate side (52). [3] Air conditioning system (1) according to one of claims 1 to 2, wherein the cooling and heating device (51) is integrated into the air guide device (50) so that a positionally fixed branch is formed in the air supply channel (10). [4] Air conditioning system (1) according to one of claims 1 to 3, wherein the cooling device (30) is arranged in the air supply duct (10) such that in the event of operation the entire blower airflow (LS) flows through the cooling device (30) and is thereby cooled and dehumidified as a whole to the desired extent. [5] Air conditioning system (1) according to any one of claims 1 to 4, wherein the cooling device (30) is designed as a heat-exchanging evaporator of a heat pump system of the vehicle. [6] Air conditioning system (1) according to one of claims 1 to 5, wherein the heating device (40) is designed as a heating heat exchanger supplied with heating power by the vehicle's heat pump system. [7] Air conditioning system (1) according to any one of claims 1 to 6, wherein a further first air outlet (62) is designed as a side air outlet and a further second air outlet (63) is designed as a defrost air outlet.

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