DE10233415B4 - System for heating and cooling an interior of a vehicle - Google Patents

Abstract

System for heating and cooling an interior of a vehicle, with
A heating heat exchanger (12) arranged in an air-conditioning unit (10) and connectable to at least one heat source (14) or at least partially formed by the same,
- One in the air conditioner (10) arranged evaporator (16) which is connectable to a refrigerant circuit and
A latent memory (18) for storing heat or cold,
characterized in that in the air conditioner (10), a further heat exchanger (20) is arranged, which is connectable to the latent memory (18) via a heat carrier circuit, and that the latent memory (18) is part of the refrigeration circuit when loading with cold.

Description

The The invention relates to a system for heating and cooling an interior of a Vehicle according to the preamble of claim 1.

The mentioned air conditioners are also available as air conditioning boxes, front boxes or HVACs (heating, ventilating and air conditioners).

The DE 100 65 279 C1 relates to a device for air conditioning of a vehicle interior according to the preamble of claim 1, comprising a compressor comprising a compressor, a condenser and at least one evaporator refrigerant circuit and with at least one heat source (for example motor or vehicle auxiliary heater) and at least one heat exchanger having heat transfer circuit. To simplify the system and accelerate the response during heating or cooling is in accordance with DE 100 65 279 C1 provided that an evaporator of the refrigerant circuit and a heat exchanger of the heat transfer circuit are arranged together in a suitable storage for storing heat or cold storage.

Furthermore, from the document DE 100 36 038 A1 an air conditioner of a motor vehicle known. This air conditioner comprises an evaporator arranged in an air duct housing, in which air can be cooled, an additional heat exchanger arranged in the air duct housing in which air can optionally be cooled or heated, and a radiator arranged in the air duct housing which can be flowed through by an engine coolant. A latent storage for storing heat or cold is in the air conditioner according to the document DE 100 36 038 A1 not provided.

In addition, from the document DE 43 27 866 C1 a device for air conditioning of a passenger compartment and for cooling a drive system of an electric vehicle known. In this from the DE 43 27 866 C1 known device for air conditioning of the passenger compartment and for cooling the drive system of electric vehicles, a memory is provided which can be used both for the storage of heat and cold. This memory is discharged via an existing anyway in the air conditioner cooling heat exchanger when cold is stored in the memory. In the event that heat is stored in the memory, the memory is discharged via an existing anyway in the air conditioner heating heat exchanger. In this case, only heat exchangers are provided in a climate control unit associated with the air conditioner, which are flowed through by water of the cooling / heating circuit.

Furthermore, from the document DE 196 01 319 A1 a radiator of a motor vehicle engine known.

Of the Invention is therefore the object of the generic systems in such a way that results in a more compact structure, the to lower manufacturing or installation costs and a requires less space, and that in the generic systems a Stand climate control based on a latent memory can be realized that can be done without elaborate adjustments of the air conditioner in particular cost-effective Way allows becomes.

These The object is solved by the features of claim 1.

advantageous Further developments and embodiments of the invention will become apparent the dependent Claims.

The inventive system builds on the generic state the technology by the fact that in the air conditioner continue a heat exchanger is arranged, which is connectable to the latent storage via a heat carrier circuit, and that the latent storage during loading with cold component of the refrigeration circuit is. By the arrangement of the heat exchanger in the air conditioner Can the outside visible number of system components are reduced and it results in a more compact overall structure. The arrangement of the heat exchanger in the air conditioner, that anyway components like housing, Fan, air ducts etc. contains, continues to lower the for a stationary air conditioning required effort and thus the costs, since Any existing components also used for stationary air conditioning can be. About that also allows the arrangement of the heat exchanger in the air conditioner a variety of advantageous developments, of which at least some later be explained in more detail. The refrigeration circuit comprises, in a manner known per se, preferably a compressor, a condenser and at least one evaporator, which is an expansion element assigned. It is considered advantageous when loading the Latent storage with cold the same compressor and the same capacitor are used, too with the in the air conditioner arranged evaporator can cooperate.

In this context, it is further preferred that the latent accumulator has a further evaporator which can be operated as a heat exchanger and a latent heat exchanger through which a heat transfer medium can flow. The further evaporator can be arranged in particular parallel to the evaporator provided in the air conditioner, wherein the further evaporator before preferably associated with another expansion organ. The latent storage thus has two heat exchangers (the evaporator and the latent storage heat exchanger), one of which is in communication with the refrigerant circuit, while the other is in communication with a heat carrier circuit, the heat carrier, for example, by a brine or a water / glycol mixture can be formed. In connection with the cold storage, the use of two heat exchangers in the latent storage makes it possible to charge with one heat exchanger via refrigerant, while with the second heat exchanger the discharge can take place via a brine circuit. The cold introduction into the interior of a motor vehicle via brine / air heat exchanger or soleführende heat exchanger is advantageous because soleführende heat exchangers in many cases require a relatively small size, so that the respective installation location can be chosen flexibly. The cooling or heat input with brine / air heat exchangers is also advantageous because heat / cold can be transported with relatively little effort from the source to the heat exchanger. For example, compared to air as a heat transfer medium less volume is required for the brine pipes as for corresponding air ducts. Furthermore, there are also advantages in terms of cost when using brine pipes.

at preferred embodiments of the system according to the invention is further provided that the latent memory for loading with Heat with at least a heat source is connectable. The loading of the latent storage with heat takes place doing advantageously over the latent storage heat exchanger. For this purpose, the Wärmeträgerme medium through a heat source (For example, the vehicle engine, a stand and / or additional heating) heated the heat over the Latent storage heat exchanger to the storage medium provided in the latent memory at least partially released and thus stored.

at a considered particularly advantageous embodiment of the system according to the invention is provided that discharged during the discharge of the latent memory Cold that Interior of the vehicle are at least partially supplied via the heat exchanger can and that during the discharge of the latent heat dissipated the interior of the vehicle at least partially over the heater core supplied can be. It is considered particularly advantageous for delivery of heat and cold different heat exchangers to use, in particular because of a sudden misting the discs can be avoided. Such misting the Slices occurs in many cases when on for the release of cold used heat exchanger below for the release of heat is used. In this case, that evaporates in the delivery of Cold generated Condensation (at least in part), resulting in the undesirable Misting of the discs leads.

in the explained above The connection is preferably still in the system according to the invention provided that discharged during the discharge of the latent memory heat that Interior of the vehicle at least partially over the heater core supplied can be, in which the heat given off by the latent memory at least partly to increase the flow temperature of a heat source is usable. The increase in Flow temperature allows to use stored heat in the latent storage without giving up of heat and cold the same heat exchanger to use.

at all embodiments of the system according to the invention it can be provided that at least one further heat exchanger is provided outside of the air conditioner arranged and connectable to the latent memory. The further heat exchangers can, for example, in the area of a commercial vehicle cabin be provided provided couch, so that a stationary air conditioning specifically this area is possible.

ever according to embodiment can in the system according to the invention be provided that the latent memory via one or more valve devices with the refrigerant circuit and / or with at least one heat source and / or with the heat exchanger and / or with the further heat exchanger in Connection stands. For example, the valves may be 4/2-way valves act, which are magnetically operated. Of course, this concludes the use of other valves is not enough.

Farther is also in the system according to the invention provided in a conventional manner that the air conditioner at least a fan assigned. It is preferred that the fan within of the air conditioner is arranged.

A further advantageous embodiment of the system according to the invention provides that the heating heat exchanger, the evaporator and the heat exchanger in the air conditioner are arranged so that they are successively or simultaneously flows through an air flow can be. The air flow may in particular be one of at least one in the air conditioner arranged blower act generated airflow.

In the context explained above is further preferred that the heating heat exchanger, the evaporator and the heat exchanger are arranged in the air conditioner in relation to the air flow one behind the other. The sequences in which the heating heat exchanger, the evaporator and the heat exchanger are arranged in the air conditioner is in principle freely selectable and can meet the respective requirements in terms of the available installation space, the flow characteristics, the respective air conditioning task (for example, "reheat" or Rückheizbetrieb ) and so on.

ever according to embodiment can in the system according to the invention be provided that the heat source a drive motor of the vehicle and / or a heater and / or an auxiliary heater includes. In the additional heater it may be, for example, an electric auxiliary heater. Furthermore come embodiments in consideration, where the heat source in the air conditioner arranged heat exchanger forms.

The The invention also relates to an air conditioner for use in the system according to the invention, wherein with regard to the air conditioner provided is that there is a heater core provided for this purpose is to be connected to a heating system of the vehicle or at least partially forms this, an evaporator, the is provided with a refrigeration circuit to be connected, and a heat exchanger which is intended to be connected to a latent memory become.

Also in connection with the air conditioner according to the invention is preferably provided that it has at least one fan.

at a preferred embodiment of the air conditioner according to the invention provided that the heating heat exchanger, the evaporator and the heat exchanger in the air conditioner are arranged so that they are successively or simultaneously flows through an air flow can be.

In In this context, it can furthermore be provided that the heating heat exchanger, the Evaporator and the heat exchanger in the air conditioner are arranged in succession relative to the air flow.

Of the The invention is based on the finding that a two heat exchanger having latent storage in a system for heating and cooling a Interior of a vehicle in an advantageous manner, in particular for stationary air conditioning, can be used if one with the Latent storage co-operating heat exchanger in addition in one known air conditioner is arranged. It is considered particularly advantageous if for Dispensing stored in the latent memory cold another heat exchanger is used as for the delivery of stored in the latent memory warmth.

The Invention will now be described with reference to the accompanying drawings using preferred embodiments exemplified.

It demonstrate:

1 a schematic representation of a first embodiment of the system;

2 a schematic representation of a second embodiment of the system;

3a a schematic representation of a third embodiment of the system;

3b the system according to 3a in a mode in which is heated by a heater;

3c the system according to 3a in a mode in which the latent memory is charged with heat;

3d the system according to 3a in an operating mode in which the flow temperature of the heater is increased by heat emitted from the latent memory;

3e the system according to 3a in a mode in which the heat-loaded latent memory for heating the interior of the vehicle via the heater core is discharged.

3f the system according to 3a in an operating mode in which a so-called cooling and "reheat" or reheat operation takes place;

3g the system according to 3a in an operating mode in which the latent memory is charged with cold;

3h the system according to 3a in an operating mode in which the cold-stored latent accumulator is discharged via the heat exchanger arranged in the air-conditioning unit;

3i the system according to 3a in an operating mode in which the cold-loaded latent storage is discharged via an optional further consumer; and

3y the system according to 3a in a mode in which the heat-loaded latent memory is discharged via an optional further consumer.

In the drawings are open Valve components are shown bright throughout, while closed Valve components are shown continuously dark.

1 shows a first embodiment of the system for heating and cooling the interior of a vehicle. The illustrated system includes an air conditioner 10 , a heat source 14 , a stationary air conditioning 24 , a valve 36 , a compressor 56 and a capacitor 58 , The heat source 14 may for example be formed by the vehicle engine and / or an (additional) heater and / or a heater, etc. The air conditioner 10 has a heating heat exchanger 12 on top of that with the heat source 14 communicates. In this as well as in all other embodiments explained below, it is possible that the heating heat exchanger 12 at least partially even the heat source 14 forms, for example in the form of an electric auxiliary heater. In the air conditioner 10 is still an evaporator 16 arranged, which an expansion organ 60 assigned. The evaporator 16 forms together with the compressor 56 , the capacitor 58 and the expansion organ 60 a known compression refrigeration cycle. In addition to the heating heat exchanger 12 and the evaporator 16 is a heat exchanger 20 in the air conditioner 10 arranged, the heat exchanger 20 via a heat transfer circuit with the stationary air conditioning 24 is connectable, which will be explained in more detail below. A fan 54 is so in the air conditioner 10 arranged that of the blower 54 generated air flow successively through the heat exchanger 20 , the evaporator 16 and the heater core 12 flows before it is supplied to the interior of the vehicle. It should be noted that in this as well as in all other embodiments explained in more detail later, the order of arrangement of the heating heat exchanger 12 , the evaporator 16 and the heat exchanger 20 can be modified according to the respective requirements. The stationary air conditioner 24 includes a pump 26 , which is provided for circulating a heat carrier, which may be formed for example by a water / glycol mixture. Furthermore, the stationary air conditioning 24 a latent storage 18 associated with a further evaporator, not shown, which is another expansion element 32 assigned. The not shown in the latent memory 18 provided further evaporator is parallel to that in the air conditioner 10 provided evaporator 16 arranged and serves to the latent memory 18 to be loaded with cold. The stationary air conditioner 24 is still a surge tank 28 assigned, in which optionally excess heat transfer medium can be stored. The latent memory 18 contains any suitable storage medium, for example water.

Below are some examples of possible modes of operation of in 1 illustrated system explained.

In the embodiment according to 1 is the latent memory 18 intended exclusively for storing cold. To the latent memory 18 with refrigeration will be charged during operation of the compressor 56 at least the 2/2 valve 34 open. In this way, the further expansion organ 32 Refrigerant supplied in the in the latent storage 18 provided (not shown) further evaporator is evaporated. The thus released cold is in the also in the latent memory 18 stored storage medium stored. Optionally, parallel to the loading of the latent memory 18 also the 2/2 valve 36 be opened so that in the evaporator 16 generated cold by means of the blower 54 can be introduced into the interior of the vehicle. Regardless of whether the 2/2 valve 34 to load the latent memory 18 is open or not, can from the evaporator 16 exiting cooled and dehumidified air flow through the heater core 12 be heated again, so that there is a mode that is primarily intended to supply dehumidified air to the vehicle interior.

The discharge of the latent memory 18 done by the pump 26 is put into operation. As a result, the heat transfer medium (for example, a water / glycol mixture) circulates through the in the latent storage 18 provided but not shown latent storage heat exchanger and the heat exchanger 20 , This mode especially for stationary air conditioning with the drive motor and thus not active compressor 56 is provided. However, it is also possible to use the latent memory 18 with active compressor 56 to unload, for example, with a closed 2/2 valve 34 and open 2/2 valve 36 , This mode can be used, for example, in cases where there is a particularly high demand for refrigeration. Regardless of whether the compressor 56 active or not, can by the blower 54 generated air flow during the discharge of the latent memory 18 over the heat exchanger 20 be cooled before it is supplied to the interior of the vehicle.

2 shows a second embodiment of the system for heating and cooling the interior of a vehicle. In the 2 illustrated embodiment corresponds to the explained in more detail below embodiment of the embodiment according to 1 , which is why I'm looking for a new detailed Description is omitted at this point. The second embodiment of the system differs from the first embodiment in that additionally a heater 22 is provided, for example, the stationary air conditioning 24 can be assigned, the heater 22 For example, it may be formed by an electric booster heater or a heater. At the in 2 illustrated second embodiment of the system according to the invention, the latent memory 18 Save and release cold (as indicated by 1 has been explained) and also store and give off heat. The in the latent memory 18 heat to be stored is through the heater 22 generated, which may optionally be equipped with its own pump (not shown). When the heater 22 equipped with its own pump, the valve can 64 be actuated such that the heat transfer medium exclusively between the heater 22 and in the latent memory 18 provided (not shown) latent storage heat exchanger circulates. Unless the heater 22 does not have its own pump, the latent memory 18 be charged with heat by the in the latent storage 18 provided latent storage heat exchanger parallel to the heat exchanger 20 is operated. In the latent memory 18 stored heat can for example be used to heat the interior of the vehicle, even if the heat source 14 is not active, for example, in stand mode. Of course, it is also possible in the latent memory 18 stored heat even with active heat source 14 release, for example, in cases where there is a particularly high heat demand.

The operation of the latent memory 18 as cold storage corresponds to the basis of 1 explained operation.

The 3a to 3y show a third embodiment of the system for heating and cooling the interior of a vehicle. The illustrated system again includes an air conditioner 10 , a heat source 14 , a stationary air conditioning 24 , a valve 36 , a compressor 56 and a capacitor 58 , The arrangement of the heating heat exchanger 12 , the evaporator 16 with associated expansion organ 60 , the heat exchanger 20 and the blower 54 corresponds to that of 1 , The same applies to the arrangement of the compressor 56 , the capacitor 58 and the valve 36 , therefore, regarding the loading of the latent memory 18 with cold related to the corresponding designs 1 is referenced. The heat source in this embodiment comprises a heater 22 which is another pump 52 and another check valve 50 assigned. Additionally or alternatively, the heat source in a manner not shown, for example, include the drive motor of the vehicle. In the in the

3a to 3y illustrated embodiment of the system is another heat exchanger 62 provided, which may optionally be associated with an unillustrated further blower. The further heat exchanger 62 For example, it can be arranged in the lying area of a utility vehicle cabin and, in particular, serve for stationary air conditioning. In this embodiment, valves 38 to 48 provided the heating heat exchanger 12 , the heat source 14 , the heat exchanger 20 , the other heat exchanger 62 and the stationary air conditioning 24 or the latent memory 18 Depending on the operating mode, connect each other in a suitable way.

Below are some possible operations of the system according to the 3a to 3y explained in more detail. However, it will be apparent to those skilled in the art that depending on the particular nature of the valves 38 to 48 , In particular, depending on the respectively intended number of working positions, other than the below explained modes of operation can be realized.

3b shows the system according to 3a in an operating mode in which heating is supplied via a heater. It can be in the latent memory 18 Heat be stored. In this mode, the heater core is 12 over the valves 46 and 48 from the heat source 14 supplied heated heat transfer medium. At the same time, the further heat exchanger 62 during operation of the pump 26 optionally by the latent memory 18 heated Wärmeträgrmedium be supplied. Also included are embodiments or operating modes in which by the latent memory 18 circulating heat transfer medium additionally or alternatively the heat exchanger 20 is supplied. However, it is considered advantageous for the reasons mentioned above, when the heat exchanger 20 is provided exclusively for cooling, in particular so that fogging of the discs can be avoided. For this reason, the in 3b dark illustrated components of the valves 42 and 44 closed, leaving the heat exchanger 20 not from the latent memory 18 passing through the heat transfer medium is flowed through.

3c shows the system according to 3a in a mode in which the latent memory is charged with heat. In this mode, the heat transfer medium circulates exclusively between the heat source 14 and the latent memory 18 , which is based on the in 3c shown respective working positions of the valves 38 to 48 can be reconstructed.

3d shows the system according to 3a in an operating mode in which the flow temperature of the heater is increased by heat emitted from the latent memory. For this purpose, the valves 38 to 48 each brought into a working position, which allows it through the latent memory 18 heated heat transfer medium to the heater 22 over the valves 40 . 44 and 48 is supplied, so that the flow temperature for the heater 22 is increased. From the heater 22 escaping heat transfer medium flows through the heating heat exchanger 12 and is about the valves 46 . 42 and 38 as well as the pump 26 again the latent memory 18 fed. By increasing the flow temperature of the heater 22 can increase the efficiency or a higher temperature at the heat exchanger 12 be achieved.

3e shows the system according to 3a in a mode in which the heat-charged latent accumulator is discharged via the heater core to heat the interior of the vehicle. For this purpose, the valves 38 to 48 be brought into the respective working position shown. In this mode, the heater is 22 not active and exiting from the heat storage heat transfer medium passes through the valves 40 . 44 . 48 to the heater core 12 and then over the valves 46 . 42 and 38 as well as the pump 26 back to the latent memory 18 , In the 3e shown operating mode is particularly suitable for stand-mode.

3f shows the system according to 3a in a mode in which a known, so-called cooling and "reheat" or Rückheizbetrieb takes place. In this mode, the compressor is 56 active, so in the evaporator 16 Cold is generated. At the same time is also the heat source 14 active, allowing the heater core 12 heated heat transfer medium is supplied. As already explained at the beginning, this operating mode can be used in particular for dehumidifying air which is intended to be introduced into the interior of the vehicle. Furthermore, it is possible, for example in connection with a so-called automatic climate control, maintain a relatively constant temperature in the vehicle interior, which can be, for example, by the driver PRE-ben. Optionally, the latent memory 18 simultaneously over the other heat exchanger 62 and / or the heat exchanger 20 be discharged (if necessary by changing the in 3f illustrated working positions of the valves 38 and 40 ), so that over the further heat exchanger 62 especially cold can be discharged.

3g shows the system according to 3a in a mode in which the latent memory is charged with cold. In this mode, the pumps are 26 and 52 preferably not in operation, so it affects the working positions of the valves 38 to 48 in principle does not arrive. Essential for this mode is that the compressor 56 in operation and the valve 34 is open, leaving the latent memory 18 via the not shown further evaporator, in the latent memory 18 is provided and with the further expansion organ 32 interacts, is charged with cold.

3h shows the system according to 3a in an operating mode in which the cold-stored latent accumulator is discharged via the heat exchanger arranged in the air-conditioning unit. This operating mode, which is particularly suitable for cooling in stationary mode, is achieved by the valves 38 to 48 each in the in 3h shown working position, the pump 52 in this mode is preferably out of service. By the latent memory 18 cooled heat transfer medium is in this mode by the pump 26 and due to the working position of the valves 38 to 44 through the heat exchanger 20 pumped. Preferably, the further heat exchanger 62 while an unillustrated further fan assigned.

3i shows the system according to 3a in an operating mode in which the cold-loaded latent storage is discharged via an optional further consumer. This operating mode corresponds to that of 3h explained operating mode, with the exception that due to the working position of the valves 38 and 40 that through the latent memory 18 cooled heat transfer medium exclusively through the other heat exchanger 62 is pumped, which is assigned in this case, preferably another blower. This operating mode can be provided, for example, to cool exclusively the couch area of a utility vehicle cabin, provided the further heat exchanger 62 is arranged there.

3y shows the system according to 3a in an operating mode in which the heat-loaded latent storage is discharged via an optional further consumer. This mode corresponds to the respective working position of the valves 34 and 36 such as 38 to 48 the basis of 3i explained mode. The only difference is that in this case heat is stored in the latent storage 18 is stored exclusively on the other heat exchanger 62 is discharged, especially in stand mode.

Although not shown in the figures, in the latent memory 18 stored heat may also be used to preheat the vehicle engine.

10

air conditioning

12

Heater core

14

heat source

16

Evaporator

18

latent storage

20

heat exchangers

22

heater

24

Standklimaanlage

26

pump

28

surge tank

30

check valve

32

additional expansion element

34

2/2-valve

36

2/2-valve

38

3/2-valve

40

3/2-valve

42

3/2-valve

44

3/2-valve

46

4/2-valve

48

4/2-valve

50

additional check valve

52

Further pump

54

fan

56

compressor

58

capacitor

60

expansion element

62

Another heat exchangers

64

3/2-valve

Claims (11)

System for heating and cooling an interior of a vehicle, comprising - one in an air conditioner ( 10 ) arranged heating heat exchanger ( 12 ), which is equipped with at least one heat source ( 14 ) is connectable or at least partially formed by these, - one in the air conditioner ( 10 ) arranged evaporator ( 16 ), which is connectable to a refrigeration circuit and - a latent storage ( 18 ) for storing heat or cold, characterized in that in the air conditioner ( 10 ) another heat exchanger ( 20 ) arranged with the latent memory ( 18 ) is connectable via a heat carrier circuit, and that the latent memory ( 18 ) is part of the refrigeration circuit when loaded with cold. System according to claim 1, characterized in that the latent memory ( 18 ) has a further operable as a heat exchanger evaporator and a flow-through of a heat transfer latent storage heat exchanger. System according to one of the preceding claims, characterized in that the latent memory ( 18 ) for loading with heat with at least one heat source ( 14 . 22 ) is connectable. System according to one of the preceding claims, characterized in that the system is designed, during the discharge of the latent memory ( 18 ) discharged cold the interior of the vehicle at least partially via the heat exchanger ( 20 ) and when discharging the latent memory ( 18 ) emitted heat the interior of the vehicle at least partially via the heater core ( 12 ). System according to claim 4, characterized in that the system is designed to prevent the discharge of the latent memory ( 18 ) emitted heat the interior of the vehicle at least partially via the heating heat exchanger ( 12 ), in which the from the latent memory ( 18 ) emitted heat at least partially to increase the flow temperature of a heat source ( 14 . 22 ) is usable. System according to one of the preceding claims, characterized in that at least one further heat exchanger ( 62 ) provided outside the air conditioner ( 10 ) and with the latent memory ( 18 ) is connectable. System according to one of the preceding claims, characterized in that the latent memory ( 18 ) via one or more valve devices ( 34 . 36 . 38 to 48 . 64 ) with the refrigeration circuit and / or with at least one heat source ( 14 . 22 ) and / or with the heat exchanger ( 20 ) and / or with the further heat exchanger ( 62 ). System according to one of the preceding claims, characterized in that the air conditioner ( 10 ) at least one blower ( 54 ) assigned. System according to one of the preceding claims, characterized in that the heating heat exchanger ( 12 ), the evaporator ( 16 ) and the heat exchanger ( 20 ) in the air conditioner ( 10 ) are arranged such that they can be flowed through successively or simultaneously by an air flow. System according to claim 9, characterized in that the heating heat exchanger ( 12 ), the evaporator ( 16 ) and the heat exchanger ( 20 ) in the air conditioner ( 10 ) are arranged one behind the other with respect to the air flow. System according to one of the preceding claims, characterized in that the heat source ( 14 . 22 ) a drive motor of the vehicle and / or a heater and / or an addition heater includes.