DE102017220381A1 - Method and apparatus for operating a vehicle air conditioning system - Google Patents

Abstract

The invention relates to a method for operating a vehicle air conditioning system comprising a blower and at least one manually operable vehicle interior air supply opening, comprising the steps: - (a) detecting a fan power requirement and / or a fan back pressure in an air duct system leading to the at least one air supply opening; b) detecting a manual closure of at least one of the air supply openings based on the detected fan power demand and / or blower back pressure; and (c) operating the vehicle air conditioning system in response to a detected manual closure of the at least one air supply opening by adjusting the blower power, in particular by a predetermined blower power proportion corresponding to the at least a detected as manually closed air supply opening, is lowered and / or the air flow from the at least one air supply opening whose manual closure is detected on at least one further driving is displaced on the inside of the chamber air supply opening.

Description

Technical area

The invention relates to a method for operating a vehicle air conditioning system comprising a blower and at least one vehicle interior side manually operable air supply opening.

Technical background

In air conditioning systems in automobiles, users can control the opening position of an air outlet opening, e.g. Set a slat position of so-called fresh air grills, a heating / cooling capacity of the air conditioning system and the performance of the fan. The heating / cooling capacity and the fan power are often regulated as a function of each other. However, the blower power is mostly independent of the opening position of the air outlet opening. If a user reduces the air supply at the air outlet opening by manual operation (eg by adjusting fins), but does not reduce the fan power accordingly, unnecessary energy consumption can occur if the fan continues to work against the flow resistance (closed fins) at the air outlet opening ,

To remedy this problem, therefore, for example, systems are known in which the fan power can be adapted to the opening state of the air outlet opening by a position determination of lamellae or flaps takes place in the flow path via limit switches. For this, however, each adjustable air outlet opening must be provided with such a switching arrangement.

Furthermore, it is off DE 410 08 17 A1 an air quantity control arrangement for motor vehicles, which determines a differential pressure between the inlet pressure in an air duct behind the blower and the vehicle interior pressure as a measure of the amount of air delivered to adapt the air supplied to the vehicle interior to various disturbances such as driving speed, window and sunroof opening. In order to always achieve a desired air volume and thus pressure differential setpoint, a voltage dependent on the determined deviation is applied to a fan motor. Sometimes this should also cause an automatic adjustment of the blower power to a manual change in the air distribution by means of butterfly valves, to achieve the original pressure difference setpoint again in this case, which is not further distinguished from the above disturbances as causes of a pressure difference change.

It is an object of the present invention to provide an improved in terms of reliability and comfort, cost-effective production and construction simplicity as well as energy efficiency solution adaptation of an air conditioning system to a manual operation, in particular closure of vehicle interior air supply openings.

Disclosure of the invention

This object is achieved by a method for operating a vehicle air conditioning system according to claim 1 and a corresponding device and a vehicle air conditioning system according to the independent claims.

Further embodiments are specified in the dependent claims.

All of the further features and effects mentioned in the claims and the description of the method also apply with regard to the device, the vehicle air conditioning system and the computer program, as well as vice versa.

1. (a) Erfassen eines Gebläseleistungsbedarfs (d. h. eines aktuellen Gebläseleistungsverbrauchs) und/oder eines Gebläsegegendrucks, der in einem zu der mindestens einen Luftzufuhröffnung führenden Luftleitungssystem stromabwärts vom Gebläse herrscht;
2. (b) definiertes Erkennen einer manuellen Schließung mindestens einer der manuell betätigbaren Luftzufuhröffnungen anhand des erfassten Gebläseleistungsbedarfs und/oder des erfassten Gebläsegegendrucks und
3. (c) Betreiben des Fahrzeugklimasystems abhängig von einer erkannten manuellen Schließung der mindestens einen manuell betätigbaren Luftzufuhröffnung, indem
   • - die Gebläseleistung um einen vorbestimmten Gebläseleistungsanteil entsprechend der/den nunmehr als manuell geschlossen erkannten Luftzufuhröffnung(en) (beispielsweise um einen Gebläseleistungsanteil, der zuvor auf die Luftzufuhr durch die nunmehr als manuell geschlossen erkannte(n) Luftzufuhröffnung(en) entfiel) gesenkt wird, oder
   • - indem ein Luftstrom, der zuvor durch die nunmehr als manuell geschlossen erkannte(n) Luftzufuhröffnung(en) strömte, auf mindestens eine weitere fahrzeuginnenraumseitige Luftzufuhröffnung kontrolliert umverteilt wird.

According to a first aspect, there is provided a method of operating a vehicle air conditioning system including a blower for conveying the air into a vehicle interior and at least one manually operable vehicle interior air supply opening, comprising the steps of:

1. (a) detecting a blower power demand (ie, a current blower power consumption) and / or a fan back pressure prevailing in an air duct system downstream of the blower leading to the at least one air supply port;
2. (b) defined detecting a manual closure of at least one of the manually operable air supply openings based on the detected fan power demand and / or the detected fan back pressure and
3. (C) operating the vehicle air conditioning system depending on a detected manual closure of the at least one manually operable air supply opening by
   • the blower power is reduced by a predetermined blower power proportion corresponding to the air supply opening (s) now recognized as being manually closed (for example, a blower power fraction which previously had been exhausted by the air supply opening (s) now recognized as manually closed); or
   • - in that a flow of air, which previously flowed through the air supply opening (s) now recognized as manually closed, is redirected in a controlled manner to at least one further vehicle-interior-side air supply opening.

A manually operable vehicle interior air supply opening is understood as partially or completely closed manually, whereby the air supply through this air supply opening can be partially or completely prevented accordingly. For this purpose, the air supply opening may comprise, for example, a manually operable plate arrangement and / or shut-off flap and / or another suitable, in particular mechanical or electromechanical closing device. The manual actuation of an air supply opening or an associated closing device can, in addition to a manual operation by a vehicle occupant, in particular also include an electrical adjustment by human interaction, for example by means of a remote control, an operating display or a control button, etc.

The manual closing of a vehicle interior side air supply opening, z. As a vehicle compartment side fin assembly and / or typically arranged upstream thereto shut-off valve, herein not only a tight or close close close the air supply port, but also a manual turning away of the air flow flowing through the respective air supply port to the side (ie away from the opposite to the air supply port seated vehicle occupant), which leads to an increase in the flow resistance and thus, for example, fan back pressure in the air line system.

One idea of the method is to automatically detect the event of manual closure of a vehicle interior air intake opening by a vehicle occupant from sensed fan power demand and / or fan back pressure, especially without other events (eg slow pressure changes due to changing vehicle speed or slight pressure fluctuations in the vehicle interior ) is confused. The defined automatic detection / registration of a closed state of an air supply opening makes it possible to adapt the operation of the vehicle air-conditioning system adequately, in particular speedily and specifically, to this situation manually changed by the occupant so that the greatest possible occupant comfort and the greatest possible energy efficiency of the vehicle air-conditioning system can be ensured throughout.

The defined detection of a manual closure of an air supply opening is based herein on conclusions about the closed in the above general sense state of the air supply opening via a back pressure sensor in the air duct system downstream of the fan and / or on the blower power requirement. When inferring about the blower power requirement, the method set forth here basically does not require any additional sensor, since the blower power requirement can be determined from blower operating parameters monitored on board the vehicle anyway, such as electric current or electric voltage of a blower motor.

The following relationships are used for the above-mentioned conclusions: If a vehicle occupant manually closes, for example, a lamella arrangement / shut-off flap (in other words a fresh-air grill), but the fan continues to operate for the time being, the pressure against which the blower must work rises. As a result, increases at constant speed usually the power requirement of the fan.

Thus, in the method set forth herein, there is no need to provide limit switches or any other type of sensors or electrical drive lines on or in the individual fresh grills or other vehicle-compartment-side shutters of the air supply openings to provide the desired functionality that energy is not unnecessarily consumed by the manually closed air supply openings and the blower is not is unnecessarily burdened to be able to fully guarantee.

As adequate automatic responses of the vehicle air conditioning system to the detected manual closure of an air supply opening, lowering of the blower power by a suitably predetermined blower power fraction and / or appropriate controlled redistribution of the airflow to further open air supply openings are provided. Lowering the blower output can prevent unnecessary energy consumption and associated blower load with manually reduced number of open air supply openings and undesirable increase in airflow in other air supply openings. Alternatively, if required - for example, at a desired cooling, heating or Durchluftgesamtleistung in the vehicle interior - a controlled air flow redistribution from the closed to other air supply openings are performed.

The controlled redistribution of the air flow can be realized in particular by suitable means, such as electrically adjustable air guide elements or air duct flaps in the air duct system, which a controllable change of an air flow direction in Air duct system allow. The controlled redistribution can, for example, include a redirection of the air flow, which previously flowed through the air supply opening (s) now recognized as manually closed, into predetermined, in particular automatically additionally opened, air supply openings which are arranged in the vehicle interior at positions at which no other occupants are disturbed by increased airflow (eg, in a floor-ceiling or center-pillar area), such as indirect or diffuse outflow.

In particular, the method presented herein enables a particularly simple and intuitive operation, because a vehicle occupant can achieve automatic adaptation of the vehicle air-conditioning system with fully guaranteed functionality and energy efficiency in the above sense in the event of undesired airflow from a specific air supply opening by simple manual closure of the fresh air grill.

The vehicle may in particular be a motor vehicle here. For example, the blower may itself be located in the air ducting system to carry the outside air into the vehicle interior against the back pressure prevailing downstream of the blower in the ducting system. In addition to the at least one manually operable vehicle interior side air supply opening, the vehicle air conditioning system may not include manually operable vehicle interior side air supply openings in the above sense.

1. (i) mindestens ein vorbestimmter Anstiegsschwellenwert durch den erfassten Gebläseleistungsbedarf und/oder den erfassten Gebläsegegendruck überschritten wird, und/oder
2. (ii) mindestens ein vorbestimmter Anstiegszeitschwellenwert für eine Zeitspanne eines Anstiegs des erfassten Gebläseleistungsbedarfs und/oder des erfassten Gebläsegegendruck unterschritten wird und/oder
3. (iii) mindestens ein vorbestimmter Zeitableitungsschwellenwert durch eine zeitliche Ableitung des erfassten Gebläseleistungsbedarfs und/oder des erfassten Gebläsegegendrucks überschritten wird.

According to one embodiment, a manual closure of the at least one air supply opening is detected when

1. (i) at least a predetermined threshold increase threshold is exceeded by the sensed fan power demand and / or the detected fan back pressure, and / or
2. (ii) at least one predetermined rise time threshold value is exceeded for a time span of an increase of the detected fan power requirement and / or of the detected fan back pressure and / or
3. (iii) at least one predetermined time derivative threshold is exceeded by a time derivative of the sensed fan power demand and / or the detected fan back pressure.

In this embodiment, for the defined detection of the manual closure of one or more air supply openings, the characteristic times and / or absolute or relative amounts of the increase in the fan power demand or fan back pressure or of their time derivatives are used. These characteristic times and amounts can, for example, be determined in advance by simple tests or by suitable model simulations or model calculations and provided in the form of defined recognition of suitable characteristics and / or threshold values, in particular entered / stored in an associated control unit or programmed in an associated computer program.

The defined recognition is based on the fact that other possible causes for an increase in the fan power demand or fan back pressure, such as a change in vehicle speed or pressure fluctuation in the vehicle interior, typically have significantly different temporal behavior and amounts of increase in the fan power demand or fan back pressure. In particular, the manual closing of the air supply openings can be characterized by a characteristic rapid increase in the fan power demand or fan back pressure, which is why the rise times and time derivatives are suitable for detection. The use of a combination of all three different methods (i), (ii) and (iii) can lead to a particularly accurate detection.

As an alternative or in addition to the exceeding / undershooting of the respective threshold values, for a defined detection of the manual closing in this embodiment, a comparison with provided characteristic time characteristics of the fan power requirement or fan back pressure can be performed and for example a non-exceeding of a deviation threshold value can be used as the recognition criterion.

In one development of the above embodiment, the at least one vehicle interior side air supply opening is a plurality of manually operable vehicle interior air supply openings, and the at least one predetermined threshold and / or the at least one predetermined time derivation threshold includes / each comprise a plurality of different thresholds for a different number and / or type of manually closed air supply openings. In this case, the predetermined blower power fraction is also defined differently depending on the respectively recognized different number and / or different type of manually closed air supply openings. In particular, in this development, a possible temporal displacement in the case of manual closure of several fresh air grills by providing correspondingly longer rise time threshold values or by omitting this recognition criterion can also be taken into account.

Thereby, the reaction of the vehicle air-conditioning system becomes the above step (C) flexibly adapted to a respective different number and / or different type (for example, size, geometry and / or arrangement in the vehicle) of the manually closed air supply openings, whereby the energy efficiency of the vehicle air conditioning system and the vehicle occupant comfort can be further increased significantly.

In a specific embodiment, to carry out the step (C) between lowering the blower power and controlling the airflow in a controlled manner using a user interface. By a controlled redistribution of the air flow, for example, a substantially unchanged heating, cooling or ventilation performance of the vehicle air conditioning system can be maintained at the same fan performance. Such a user interface may be provided, for example, as a menu item in an existing climate system operator program.

In particular, the steps (A) to (C) while driving repeatedly, for example at predetermined periodic intervals or continuously performed. As a result, an always current situation with respect to the manually operable air supply openings can be detected and taken into account by the above system reaction, which in turn leads to increased vehicle occupant comfort and increased energy efficiency.

In a specific embodiment, the at least one vehicle-interior-side air supply opening is a plurality of manually operable vehicle-compartment-side air supply openings and the air-line system has a manifold connected to the plurality of air supply openings manifold portion, wherein a back pressure sensor for detecting the blower back pressure is arranged in the manifold portion. Thus, the variant of the method based on the detection of the fan backpressure can be realized with a single backpressure sensor.

In particular, in the method set forth herein, sensing the fan power demand may include sensing an electrical power required by a blower motor and / or decreasing blower power may include decreasing a fan speed.

According to a further aspect, an apparatus, in particular a control unit, is provided for operating a vehicle air-conditioning system of the type set forth herein, the apparatus being designed to carry out a method of the type set forth herein. Furthermore, according to a still further aspect, there is provided a vehicle air conditioning system of the kind set forth herein which is adapted to carry out the method of the kind set forth herein and in particular may comprise said control unit.

Another aspect is a computer program that is loadable into a controller and configured to perform all the steps of a method of the kind set forth herein when executed in the controller. According to a further aspect, a machine-readable storage medium is provided on which such a computer program is stored.

list of figures

• 1 eine schematische Darstellung eines Fahrzeugklimasystems der hierin dargelegten Art und
• 2 ein Flussdiagramm zur Darstellung eines Verfahrens der hierin dargelegten Art zum Betreiben eines Fahrzeugklimasystems.

Embodiments are explained in more detail below with reference to the examples shown in the accompanying drawings. The drawings are purely schematic, in particular they are not to be read as true to scale. Show it:

• 1 a schematic representation of a vehicle air conditioning system of the type set forth herein, and
• 2 a flowchart for illustrating a method of the type set forth herein for operating a vehicle air conditioning system.

Description of embodiments

1 shows very simplified and schematically an example of a vehicle air conditioning system 1 of the type set forth herein, that of an air duct system 2 and a fan disposed therein 3 to the outside air against a downstream of the fan 3 in the airline system 2 prevailing back pressure in a vehicle interior (not shown) to convey (indicated by arrows).

For illustrative purposes shows 1 purely exemplary two in the above sense manually operable vehicle interior air supply openings 4 which are each manually operable with a vehicle occupant, d , H , in particular partially or completely closable lamellar arrangement 5 , in the 1 symbolically indicated by a parallel bar arrangement are provided. Alternatively or in addition to a manually operable blade assembly 5 can in the airline system 2 For example, a manually operable shut-off valve (not shown) can be arranged directly behind a lamella arrangement. The airline system 2 in this example has one with both air supply openings 4 connected manifold section 2a from the two to the respective air supply openings 4 leading single-line sections 2 B branch.

It may also be provided less or more vehicle interior side air supply openings of this kind or other type, for example, in a motor vehicle one or two air supply openings for the driver and the passenger in the dashboard and other manually operable or non-actuable air supply openings near the vehicle floor, the vehicle ceiling and / or for inmates on rear seats.

In 1 is the left lamellar arrangement 5 shown in a manually closed state, in which little or no air through this air supply opening 4 can flow into the vehicle interior, which is indicated by a returning (air flow) arrow. On the other hand is in 1 the right lamellar arrangement 5 shown in an open state, in the air through this air supply opening 4 can flow into the vehicle interior.

2 FIG. 12 is a flow chart illustrating an example of a method of the type set forth herein for operating a vehicle air-conditioning system using the example of the vehicle air-conditioning system 1 the 1 is explained.

For example, the method may be automatically performed by a control unit (not shown) of the kind set forth herein in which, for example, a computer program of the type set forth herein has been loaded.

All of the above-mentioned or described in detail embodiment and execution features of the method and the vehicle air conditioning system in the context of the present invention can be used in the examples shown in the figures, optionally alternatively or additionally, and are therefore not all repeated again. The same applies mutatis mutandis to the above-mentioned definitions of terms and also for the above-mentioned effects with respect to individual features shown in the figures.

The exemplary method explained below is based on the detection of the blower power requirement, which can be determined without additional sensors from blower operating parameters monitored in any case aboard the vehicle, such as electric current or electrical voltage of a blower motor (not shown). Alternatively or additionally, a fan back pressure from a back pressure sensor, for example, at an in 1 With P marked spot in the manifold section 2a of the air duct system 2 downstream from the blower 3 can be arranged to be detected.

In a preparatory first step (A0) In this example, through tests with a motor vehicle and a vehicle air-conditioning system of the same type or based on appropriate model simulations or calculations, the defined detection of a manual closure of one and both lamination assemblies 5 the 1 defined based on the detected blower power requirement. As explained above in detail, the following relationships are used: If a vehicle occupant - as in 1 purely by way of example indicated - the left lamellar arrangement 5 closes manually, the blower 3 but for the time being continues to work, the pressure increases, against which the blower 3 must work on, because the previously by the in 1 left air intake opening 4 in the vehicle interior flowing air mass against the now closed left air supply opening 4 can not drain. This is in 1 through one of the left louver assembly 5 to the manifold section 2a returning air mass flow illustrated. As a result, increases at constant speed usually the power requirement of the fan 3 ,

By quantitatively detecting this increase in blower power demand, for example in the form of a corresponding absolute or relative magnitude of the increase in blower power demand and / or its time derivative and / or a rise time characteristic of that rise, the 1 illustrated event of manual closure of the left louver assembly 5 recognized in a defined manner and in particular of the above-mentioned different events in the vehicle air conditioning system 1 , which can also cause a change in the fan power requirement, are reliably distinguished. As suitable recognition criteria characteristic threshold values are determined here for example from characteristic curves of the blower power requirement recorded in preparatory tests and provided as predetermined rise thresholds, rise time thresholds and / or time derivative thresholds, in particular forwarded to a control unit of the kind set forth herein or programmed in a computer program of the kind set forth herein.

The appropriate detection criteria thus provided may be in particular dependent on the blower power requirement and / or the state, if appropriate, in the vehicle air conditioning system 1 existing other air supply openings - in 1 the lamellar arrangement 5 the right air intake opening 4 - be provided in the form of correspondingly differentiated data records.

Finally, at the preparatory step ( a0 ) also the respectively suitable reaction of the vehicle air conditioning system 1 prepared, in this example, to provide an appropriate fraction by which the detected before the detected event Blower power is to be lowered in order to maintain unaltered air flows in not recognized as closed air supply openings of the vehicle air conditioning system 1 to ensure. This is provided in the form of a predetermined blower power component, for example forwarded to the control unit or programmed in the computer program. In particular, the predetermined blower power fraction can also be defined as a function of the respective blower power requirement and / or the state of other air supply openings. For example, in a limiting case in which all the vehicle interior side air supply openings are closed, the appropriate reaction of the vehicle air conditioning system 1 in a turn off the blower 3 ( d , H , Lowering the blower output by a blower power percentage of 100%).

As described in detail above, as an alternative or in addition to lowering the blower power and in a similar manner at step (b), a0 ) a controlled redistribution of an air flow previously through the now recognized as manually closed air supply opening 4 flowed, defined at least one further vehicle interior air supply opening / predetermined and thus be prepared.

1. (i) Überschreitung eines der vorbestimmten Anstiegsschwellenwerte;
2. (ii) Überschreitung eines der vorbestimmten Zeitableitungsschwellenwerte;
3. (iii) Unterschreitung eines der vorbestimmten Anstiegszeitschwellenwerte, unter Verwendung der jeweiligen im obigen Vorbereitungsschritt (a0) bereitgestellten Schwellenwerte. Ist eine der so geprüften Bedingungen (i)-(iii) nicht erfüllt (Schritt (b): nein), wird das Verfahren mit dem Schritt (a1) fortgesetzt.

In operation, in this example, in one step ( a1 ) in the above manner, the blower power demand detected. In a further step ( b ), one to all three of the following conditions (depending on the i ) - (iii) tested:

1. (i) exceeding one of the predetermined slew thresholds;
2. (ii) exceeding one of the predetermined time derivative thresholds;
3. (iii) Falling below one of the predetermined rise time thresholds, using the respective ones in the above preparation step ( a0 ) provided thresholds. Is one of the conditions tested ( i ) - ( iii ) is not fulfilled (step ( b ): no), the procedure goes to step ( a1 ).

The fulfillment of all the conditions tested ( i ) - (iii), on the other hand, is automatically considered to be a defined recognition of a manual closure of at least one of the lamellar arrangements 5 In addition, when providing multiple rise or time derivative thresholds, the number and / or type of manually closed air supply openings may also be interpreted 4 can be concluded. At "step ( b ): yes "is therefore the method with a step ( c ), during which the preparation step ( a0 ) defined reaction of the vehicle air conditioning system 1 to one or more than manually detected slat arrangements 5 is carried out.

In particular, the whole process of the 2 cyclically, for example continuously or at predetermined periodic intervals. For this purpose, the method in the example according to 2 after step ( c ) with the step ( a1 ).

LIST OF REFERENCE NUMBERS

1

Vehicle air system

2

Duct system

2a

Manifold section

2 B

Single line section

3

fan

4

Air supply port

5

manually operable lamellar arrangement

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4100817 A1 [0004]

Claims (10)

A method of operating a vehicle air conditioning system (1) comprising a blower (3) and at least one manually operable vehicle interior air supply opening (4), comprising the steps of: (A) detecting a fan power requirement and / or a fan back pressure in an air duct system (2) leading to the at least one air supply opening (4); (B) detecting a manual closure of at least one of the air supply openings (4) based on the detected fan power demand and / or fan back pressure and (c) operating the vehicle air conditioning system (1) in response to a detected manual closure of the at least one air supply opening (4) by - The blower power, in particular by a predetermined Gebläseleistungsanteil corresponding to the at least one as manually closed detected air supply opening (4), is lowered and / or - The air flow from the at least one air supply opening (4), the manual closure is detected, is deflected to at least one further vehicle interior side air supply opening. Method according to Claim 1 wherein a manual closure of the at least one air supply port (4) is detected when (i) at least one predetermined increase threshold is exceeded by the sensed fan power demand and / or the detected fan back pressure, and / or (ii) at least one predetermined rise time threshold value for a period of one Is exceeded and / or (iii) at least one predetermined time derivative threshold is exceeded by a time derivative of the detected fan power requirement and / or the detected fan back pressure. Method according to Claim 2 in which - a plurality of manually operable air supply openings (4) are provided, - the at least one predetermined rise threshold value and / or the at least one predetermined time derivation threshold each comprise a plurality of different threshold values for a different number and / or type of the manually closed air supply openings (4) and - the predetermined blower power fraction is differently predetermined depending on the respectively detected different number and / or different nature of the manually closed air supply openings (4). Method according to one of the preceding claims, wherein to perform the step (c) between a lowering of the blower power and a controlled redirecting the air flow is selected by means of a user interface. Method according to one of the preceding claims, wherein steps (a) to (c) are repeated during travel, in particular at predetermined periodic intervals or continuously. Method according to one of the preceding claims, wherein a plurality of manually operable air supply openings (4) are provided, wherein the fan back pressure is detected by means of a back pressure sensor in a manifold section (2a) corresponding in the air duct system (2) a portion through which the air flow for the plurality of air supply openings (4) flows. Method according to one of the preceding claims, wherein detecting the fan power requirement comprises detecting an electric power required by a blower motor and / or - Lowering the blower power includes lowering a blower speed. Device, in particular a control unit, for operating a vehicle air conditioning system (1) comprising a blower (3) and at least one manually operable vehicle-compartment-side air supply opening (4), the device being designed to carry out a method according to one of the preceding claims. A vehicle air conditioning system (1) having a blower (3), at least one manually operable vehicle interior air supply opening (4) and a device according to Claim 8 , Computer program that is loadable into a control unit and is adapted to perform all the steps of a method according to one of Claims 1 to 7 when executed in the control unit.

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