Stationary air conditioning of a vehicle interior

Abstract

Method for stationary air conditioning of a vehicle interior of a parked motor vehicle, wherein a departure time (t AZ ) can be specified, at which the vehicle interior has a desired climate control state, with the steps: - Activating an air conditioning function to control the air conditioning of the vehicle interior for a first period of time (Δt) before the specified departure time (t AZ ); and - after activating the air conditioning function, premature cancellation of the air conditioning function depending - from a shift of the current system time (t I ).

Description

[0001] The invention relates to a method for stationary air conditioning of a vehicle interior of a parked motor vehicle.

[0002] Methods for air conditioning the vehicle interior of a parked motor vehicle are known from the prior art. In these methods, a departure time can be specified by the user, for example via the user interface of a head unit or via a smartphone app, at which time the vehicle should have a desired air conditioning state, such as a certain temperature. Since reaching the desired air conditioning state at the departure time requires a certain amount of time due to the inertia of the thermal system, and the user may want to use the vehicle shortly before the specified departure time, the vehicle begins air conditioning the interior in good time before the departure time, for example, heating or cooling the interior depending on the temperature.This ensures that the interior is in the desired climate condition, for example, at a comfortable temperature, when the user intends to use the vehicle at the scheduled departure time. Such an exemplary method for stationary climate control of a vehicle interior is known from document DE 103 26 596 A1.

[0003] The vehicle typically starts an air conditioning function to control the air conditioning of the vehicle interior an initial period of time (e.g., 30 minutes) before the specified departure time. In a simple variant of the air conditioning function, the air conditioning function immediately starts the respective air conditioning device (e.g., auxiliary heating to increase or cool the temperature, or auxiliary ventilation to decrease the temperature). In a preferred variant of the air conditioning function, various boundary conditions are used to calculate how long the respective air conditioning device (e.g., auxiliary heating, auxiliary ventilation, or auxiliary cooling) actually needs to run to reach the desired interior temperature.If this period is shorter than the first period, the air conditioning function starts the respective air conditioning device (the auxiliary ventilation, auxiliary ventilation or auxiliary cooling) later for energy efficiency reasons (the air conditioning function is then initially activated in standby mode, in which no air conditioning device is activated), otherwise immediately.

[0004] The air conditioning function, and thus the stationary air conditioning of the interior, is deactivated, for example, when the vehicle is in use or—if the user is not using the vehicle—at the latest after a follow-up time has elapsed after the departure time (e.g., 5 minutes after the departure time). The vehicle is used, for example, when the vehicle is started up (e.g., when the ignition is turned on). Alternatively, the vehicle could also begin when the door is opened or the driver's seat is occupied.

[0005] After activating the climate control function (e.g., 20 minutes before departure), the user may postpone the departure time or deactivate it entirely. For example, the departure time is programmed for 8:00 a.m. and the auxiliary heating starts at 7:30 a.m. At 7:45 a.m., the departure time is changed to 9:00 a.m., e.g., via a smartphone app.

[0006] Furthermore, it would be conceivable that after activating the climate control function, the user intentionally shifts the system time via a user interface, a summer time / winter time changeover takes place or a system time in the climate control unit is shifted due to an updated system time later received from the climate control unit via a vehicle bus.

[0007] DE 195 48 548 A1 discloses an auxiliary vehicle heater that can be activated by means of a remote control system. Contrary to a previously claimed design in that document, in which a timer is installed in the vehicle as an additional time-programmable device, it is provided that a transmitter serves at least as an input unit for the time-programmable device and has corresponding control elements for programming at least one start time value.

[0008] DE 10 2006 052 370 A1 discloses a control device for an additional device for or in a vehicle, comprising a memory, a switching unit, and a detection unit. The memory stores a first and a second preselected operating time of the additional device, the switching unit switches on the additional device of the vehicle at the stored operating times, and the detection unit detects whether the vehicle is being used. Furthermore, the control device comprises a means for deactivating the second operating time, which deactivates the second operating time if the detection unit detects no use of the vehicle at the first operating time.

[0009] It is an object of the invention to provide a method for stationary air conditioning of a vehicle interior and a corresponding vehicle system, the behavior of which is adapted when such special cases occur so that the behavior corresponds to the user's expectations.

[0010] The object is achieved by the features of the independent patent claims. Advantageous embodiments are described in the dependent claims.

[0011] A first aspect of the invention relates to a method for stationary air conditioning of a vehicle interior of a parked motor vehicle, wherein a departure time can be specified at which the vehicle interior has a desired air conditioning state. In the method, a (stationary) air conditioning function for controlling the air conditioning of the vehicle interior is activated a first time period (e.g., 30 minutes) before the specified departure time, as already explained in the introduction to the description. This is the general case. However, exceptions are possible, for example if the driver specifies a departure time that is less than the first time period in the future (e.g., a departure time already in 15 minutes, although the first time period is, for example, 30 minutes); in this case, the air conditioning function should preferably start immediately.

[0012] After activating the (parking) climate control function, the climate control function can be canceled depending on a change in the specified departure time after the climate control function was activated. For example, in the above example, if the departure time is changed from 8:00 a.m. to 9:00 a.m. at 7:45 a.m. after activating the climate control function, the climate control function will be canceled and restarted preferably at 8:30 a.m.

[0013] Alternatively or additionally, it can be provided that after the air conditioning function has been activated and the predefined departure time is deactivated, the air conditioning function is canceled. For example, if the departure time is deactivated at 7:45 a.m. after the air conditioning function has been activated, the air conditioning function is canceled. In principle, it is advantageous if the stationary air conditioning continues to air-condition the interior for a specific run-on time after the departure time has elapsed without the vehicle being started. If a run-on time is provided, it is advantageous if the air conditioning function is canceled prematurely, provided that the predefined departure time was deactivated before the departure time was reached. If the departure time is deactivated during the run-on time, the air conditioning function should not be canceled prematurely.If the user deactivates the departure time during the run-on time period, it can be assumed that, in the case of a regular departure time, the user only wishes to deactivate the stationary air conditioning function for the next day, on which the stationary air conditioning would otherwise start again at the same departure time without deactivating the departure time.

[0014] Alternatively or additionally, it can be provided that the method is aborted in a manner analogous to the shifting of the departure time if the current system time shifts after the activation of the air conditioning function. For example, in the above example, if the system time is shifted to 6:45 a.m. at 7:45 a.m. after the air conditioning function is activated, the air conditioning function is aborted and preferably restarted when the then shifted system time reaches 7:30 a.m.

[0015] A shift in the system time can be caused by the user. Alternatively, it is conceivable that a system time in the climate control unit is shifted due to an updated system time later received from the climate control unit via a vehicle bus. For example, the climate control function for controlling the climate control runs on a climate control unit. To activate the climate control function, the climate control unit receives a wake-up signal from another control unit (e.g. the control unit of the instrument cluster, also known as the combination control unit) for an initial period of time before the departure time (e.g. at 7:30 a.m.) to wake up the climate control unit. The climate control unit uses its own initial current system time as long as the climate control unit has not received a current system time from the other control unit after the wake-up signal.The shift of the current system time occurs when the current system time is received from the other control unit, if the system time in the climate control unit is synchronized to this received system time.

[0016] With regard to the postponement of the departure time, it can be provided that after the air conditioning function has been activated, the air conditioning function is aborted prematurely if the departure time is postponed to a time before the current system time.

[0017] In an analogous manner, alternatively or additionally, it can be provided that after the air conditioning function has been activated, the air conditioning function is aborted prematurely if the current system time is shifted behind the departure time.

[0018] Alternatively or in addition to canceling the function if the departure time is postponed to a time before the current system time, it can be provided that if the departure time is postponed to a time more than the first time period in the future from the current system time, the air conditioning function is prematurely canceled. In this case, the air conditioning function is preferably reactivated a first time period before the changed departure time.

[0019] In an analogous manner, alternatively or in addition to the cancellation of the function if the current system time is shifted behind the departure time, it can be provided that after the activation of the air conditioning function, the air conditioning function is canceled prematurely if the current system time shifts in such a way that the departure time is more than the first time period behind the shifted current system time.

[0020] It is advantageous if, when the air conditioning function is activated, a functional duration of the air conditioning function is calculated for an initial period of time before the departure time (where activation is triggered, for example, by a wake-up signal / trigger signal from a combination control unit to the air conditioning control unit). The functional duration is the time during which the software executes the corresponding stationary air conditioning function. The air conditioning function is active during this time, whereby any time at the beginning of the functional duration during which none of the air conditioning devices (e.g. heating, ventilation, or cooling) is active for energy efficiency reasons is preferably also counted. The functional duration therefore serves to internally control the end of the function.

[0021] The operating time typically corresponds to the time available for the stationary air conditioning until the departure time plus a possible run-on time (e.g., 5 minutes). The time available for the stationary air conditioning until the departure time corresponds to the time between time t T of the receipt of the trigger signal / activation of the air conditioning function and the shutdown time. The time period between the time t T The reception of the trigger signal / activation of the air conditioning function and the shutdown time usually corresponds approximately to the first time period (e.g. 30 min).

[0022] If the departure time is postponed, a recalculation of the operating duration for the air conditioning function and / or the time available until the departure time is preferably carried out, provided that the air conditioning function is not canceled when the departure time is postponed.

[0023] As stated above, the air conditioning function is preferably aborted when the shutdown time is postponed to a point in time that is before the current system time or more than the first time period in the future from the current system time. Therefore, the operating time and / or the time available until the shutdown time is preferably recalculated when the shutdown time is postponed to a point in time that is not before the current system time and is not more than the first time period in the future from the current system time.

[0024] It is also advantageous if, when the current system time is shifted, a functional duration for the air conditioning function and / or a time available until the departure time is recalculated, provided that the air conditioning function is not aborted when the system time is shifted.

[0025] As explained above, the air conditioning function is preferably aborted when the system time is shifted such that it is behind the departure time, or the departure time is more than the first time period behind the shifted current system time. Therefore, the functional duration of the air conditioning function and / or the time available until the departure time are preferably recalculated when the current system time is shifted such that the system time is not shifted behind the departure time and the departure time is not more than the first time period behind the shifted current system time.

[0026] Preferably, several different departure times can be specified by the user. After a previous departure time has elapsed, the operating time for the air conditioning function and / or the time available until the next departure time is recalculated if the previous departure time and the next departure time differ by less than the first time period.

[0027] For example, it can be provided that a certain time period (e.g., 1 minute) after a departure time, the combination control unit communicates the next departure time to the climate control unit. In the case of overlapping departure times, i.e., departure times that differ by less than the first time period (e.g., 30 minutes) (e.g., an earlier departure time of 12:00 and a later departure time of 12:10), the operating duration is preferably updated as soon as the later departure time is sent to the climate control unit.

[0028] According to a further aspect of the method, after the air conditioning function has been activated, the air conditioning function is paused if the motor vehicle is used prematurely (i.e. if it is used before the departure time) (this also pauses any air conditioning that is already running) and the air conditioning function is resumed when the vehicle is stopped. In this case, it is advantageous if the air conditioning function is only resumed when the vehicle is stopped if the departure time has not yet been reached. If driving is ended during the run-on time, the function is not resumed. For example, the departure time is programmed for 8:00 a.m. and the auxiliary heater starts at 7:30 a.m. with an initial time of 30 minutes. The regular end of the function would be 8:05 a.m., assuming a run-on time of 5 minutes.However, the user drives a short distance from 7:40 a.m. to 7:45 a.m. and then parks the vehicle again. The climate control function therefore stops at 7:40 a.m. Since the departure time has not yet been reached when driving is stopped at 7:45 a.m., the climate control function restarts. However, if the vehicle is parked after 8:00 a.m. and not before the departure time, the auxiliary heater should not be reactivated.

[0029] The above statements on pausing the air conditioning function and resuming the air conditioning function are fundamentally independent of the technical teaching of claim 1.

[0030] A second aspect of the invention is directed to a system for stationary air conditioning of a vehicle interior of a parked motor vehicle, wherein a departure time can be specified at which the vehicle interior has a desired air conditioning state. The system comprises a first control unit (for example, a combination control unit) and an air conditioning control unit. The first control unit is configured to wake up the air conditioning control unit a first period of time before the specified departure time, so that the air conditioning control unit then activates an air conditioning function for controlling the air conditioning of the vehicle interior.The climate control unit is configured to prematurely abort the climate control function after activation of the climate control function depending on a shift that occurred after activation of the climate control function or a deactivation of the specified departure time that occurred after activation of the climate control function or a shift of the current system time that occurred after activation of the climate control function.

[0031] To start the standby function, the first control unit preferably sends a trigger signal to the climate control unit. This usually occurs at the beginning of the first time period before the departure time, for example, 30 minutes before the departure time. If multiple departure times can be defined, the first control unit preferably determines the next departure time internally and sends the information about the next departure time to the climate control unit a specific time period after the previous departure time (for example, 1 minute after the departure time). If the vehicle is not in use, the climate control function is canceled after a specific follow-up time after the departure time (e.g., 5 minutes after the departure time).

[0032] The above statements regarding the method according to the invention according to the first aspect of the invention also apply correspondingly to the system according to the invention according to the second aspect of the invention. Advantageous embodiments of the system according to the invention not explicitly described here or in the claims correspond to the advantageous embodiments of the method according to the invention described above or in the claims.

[0033] The invention is described below using an exemplary embodiment with the aid of the accompanying drawings. In these drawings: Fig. 1 shows an embodiment of a system for stationary air conditioning of a vehicle interior; Fig. 2 an exemplary user interface; and Fig. 3 a time course.

[0034] In Fig. 1 shows an embodiment of a system for stationary air conditioning of a vehicle interior. Via the user interface of a head unit 1, the user can specify one or more departure times, which are received by a control unit 2 of the instrument cluster, designed as a combination control unit. At the specified departure time, the vehicle interior should then be in a desired air conditioning state, e.g., have an interior temperature specified by the system. Departure times can optionally also be entered via a vehicle key 5 with a display (e.g., via a touchscreen) and / or via a suitable app 6 on a smartphone, whereby the smartphone is connected to the vehicle via the Internet and a backend server. All entered departure times are collected in the combination control unit 2.

[0035] An air conditioning control unit 3 is used to control the auxiliary ventilation and auxiliary heating 4 and activate them as needed. The auxiliary ventilation ventilates the interior and, if necessary, lowers its temperature. To reduce the temperature, cooling in the form of a compression air conditioning system could be provided as an alternative or in addition to the auxiliary ventilation. The auxiliary heating heats the interior.

[0036] In Fig. Figure 2 shows an example user interface of the head unit 1 for entering departure times. The user interface shown is displayed on a screen in the vehicle, and the user can enter inputs using an input medium (e.g., a multifunctional control button that can be pressed for confirmation and tilted in different directions for screen navigation, or a touchscreen). A one-time departure time can be entered (7:00 a.m. in this example). Pre-conditioning then only takes place on a single day, specifically at the entered one-time departure time. Furthermore, for example, several additional regular departure times (three in this example) can be specified, which can optionally be restricted to specific days of the week (if there is no restriction to the day of the week, the departure time applies to every day of the week).For example, by checking a box, the respective one-time or regular departure time can be activated; a deactivated departure time will be ignored by the system. Preferably, an activated one-time departure time is prioritized over the activated regular departure times in such a way that the activated regular departure times are ignored as long as the activated one-time departure time has not been reached.

[0037] All departure times predefined by the user are stored in the combined control unit 2. The combined control unit 2 regularly determines the next active departure time internally.

[0038] The individual departure times are sent regularly (e.g. every 10 ms) via a vehicle bus from the combination control unit 2 to the climate control unit 3.

[0039] Normally, the combination control unit 2 sends a trigger signal to the climate control unit 3 a defined pre-start period Δt before the next active departure time (for example, Δt = 30 min). If the climate control signal was previously in a sleep state, the climate control unit 3 is awakened by the trigger signal and the climate control function for controlling the climate control of the vehicle interior is activated. If the departure time has just been entered and the time until this departure time t AZ is smaller than Δt, the air conditioning function starts immediately.

[0040] The air conditioning function calculates a function duration for each trigger signal, which in the present embodiment is the available time until the departure time plus the follow-up time Δt NZ certainly.

[0041] The auxiliary air conditioning function also calculates, based on various boundary conditions, how long the auxiliary heating or auxiliary ventilation will be active before the next active departure time t AZ actually needs to run to reach a desired interior temperature. If this required time Δt BZ is less than the time period Δt (here Δt = 30 min), the air conditioning function initially starts in standby mode, ie the auxiliary ventilation or the auxiliary heating is not activated. Otherwise, the auxiliary ventilation or the auxiliary heating starts immediately. If the required time period is less than the pre-start time period Δt (here Δt = 30 min), at time t AZ - Δt BZ (e.g. 20 minutes before departure time) the standby mode is left and the auxiliary ventilation or the auxiliary heating is activated.

[0042] After the departure time t AZWithout use (especially commissioning) of the vehicle, the interior is heated for a certain follow-up time Δt NZ (e.g. Δt NZ = 5 min) continues to be air-conditioned.

[0043] At time t AZ + Δt NA (with Δt NA < Δt NZ , e.g. Δt NA = 1 min) the next active departure time is communicated to the climate control unit 3 by the combination control unit 2.

[0044] At time t AZ + Δt NZ the function ends.

[0045] After the air conditioning function is normally switched on at time t AZ - Δt has been activated, the air conditioning function can be used until its end of function at time t AZ + Δt NZ be terminated prematurely by a series of termination criteria. This is determined by Fig. 3. Here, the vertical line corresponds to a time progression with time increasing to the right. The marked time t Icorresponds to the current system time. The time sequence is divided into - the hatched time range 10 with t < t I - the hatched time range 11 with t > t I + Δt - the dotted time range 12 with t ≥ t I and t ≤ t I + Δt - the completely filled time range 13 with t ≥ t I and t ≤ t AZ and - the unfilled time range 14 with t > t AZ and t ≤ t AZ + Δt NZ .

[0046] According to a first termination criterion, after activation of the air conditioning function, the air conditioning function is terminated if the next departure time t on which the activation is based AZ is shifted into the past, ie when the shifted departure time t' AZ less than the current system time t I In this case, the departure time t AZshifted into the hatched time range 10. An example of an already shifted departure time t' AZ , which has been shifted to the hatched time range 10, is in Fig. 3. A shift in the departure time t AZ into the past signaled that the driver probably did not have air conditioning at the previous departure time t AZ desired; the air conditioning function is therefore canceled.

[0047] According to a second termination criterion, the activated air conditioning function is terminated if the next departure time t on which the activation is based AZ is postponed into the future by more than the pre-start time Δt (e.g. Δt = 30 min), ie the departure time t AZ is shifted to the hatched time range 11. An example of an already shifted departure time t'' AZ , which has been shifted to the hatched time range 11, is in Fig. 3. In this case, the driver wants to depart later with the vehicle, whereby the remaining time until the postponed departure time t'' AZ is greater than the pre-start time Δt and the air conditioning function can be aborted for energy efficiency reasons and in good time before the changed departure time t AZ '' is restarted.

[0048] According to a third termination criterion, the activated air conditioning function is terminated if the next departure time t on which the activation is based AZ is deactivated. In the user interface in Fig. 2, for example, the check mark in front of the next departure time is removed. However, the cancellation preferably only occurs if the deactivation of the departure time t AZ before reaching the departure time t AZAlternatively, it could be provided that the cancellation preferably only occurs if the deactivation of the departure time t AZ until departure time t is reached AZ occurs, ie when the current system time t I when deactivated is in the time range 13. If the deactivation of the departure time t AZ however, occurs in the follow-up time period, ie when the current system time t I is in the time range 14, the air conditioning function will not be terminated prematurely. If the user sets the shutdown time t AZ deactivated, it can be assumed that in the case of a regular departure time, the user only wishes to deactivate the stationary air conditioning function for the next day, on which the stationary air conditioning would otherwise start again at the same departure time without deactivation of the departure time.

[0049] If the expiration time t AZis reached, the stationary air conditioning function is automatically cancelled when the vehicle is switched on (e.g., when the ignition is turned on). Without switching on, the function ends at t AZ + Δt NZ .

[0050] If, after activating the stationary air conditioning function, the vehicle is driven before the departure time t on which the activation is based AZ is already in operation, the stationary climate control function is interrupted or paused. When the vehicle is stopped, the function is resumed when the departure time t AZ has not yet been reached at the time the vehicle operation is terminated. For example, if at a scheduled departure time t AZIf the air conditioning function is activated at 9:30 a.m. from 10:00 a.m. and the vehicle is started up at 9:40 a.m., the stationary air conditioning function will be interrupted at 9:40 a.m. If vehicle operation is terminated before the departure time, for example, at 9:50 a.m., the stationary air conditioning function will be resumed (for example, immediately upon termination of operation or only after the user has left the vehicle and closed the doors). However, if the vehicle is still in operation at the departure time, the interrupted air conditioning function will be permanently terminated.

[0051] When the climate control unit 3 receives a trigger signal from the combination control unit 2, the operating time of the climate control function is calculated (this usually happens at approximately time t I = t AZ - Δt). The operating time typically corresponds to the available time t AZ - t Iuntil the next departure time t AZ plus the follow-up time Δt NZ .

[0052] If the air conditioning function is activated and the departure time t AZ within the time range 12 to a departure time t''' AZ instead of being shifted to time range 10 or 11 (see the example departure time t''' AZ in Fig. 3), the air conditioning function is not aborted (since none of the abort criteria are met). Instead, a shift within time range 12 results in a recalculation of the available time period t''' AZ - t I and to a recalculation of the resulting functional duration t''' AZ - t I + Δt NZ .

[0053] In the case of overlapping departure times, i.e. departure times that differ by less than the pre-start time Δt (e.g. an earlier departure time of t AZ,1= 12:00 and a later departure time of t AZ,2 = 12:10), the duration of operation is updated after the previous departure time has elapsed. The recalculation is preferably carried out if at time t AZ,1 + ΔT NA the climate control unit 3 from the combination control unit 2 the next active departure time t AZ,2 The newly calculated duration of operation then extends until time t AZ,2 + Δt NZ , so that the air conditioning function can then be switched on without starting the vehicle until time t AZ,2 + Δt NZ continues instead of at time t AZ,1 + Δt NZ to cancel.

[0054] The embodiment was described above with reference to a shift of the departure time t AZ described. If there is a shift in the system time t present in the climate control unit 3 Ioccurs, for example due to a change made by the user via the head unit 1 or during a summer / winter time change, the function can be aborted in a similar way to when one of the first two abort criteria is met.

[0055] The shift in the system time can also be triggered, for example, by the system time being received from the climate control unit 3 only at a later time. The climate control unit 3 uses its own initial current system time when starting up the climate control unit 2, as long as the climate control unit has not received a current system time from the combination control unit 2 after being woken up. Once the system time has been received from the combination control unit 2, a shift in the current system time can occur if the system time in the climate control unit 3 is synchronized to the received system time.

[0056] Analogous to the first termination criterion, the air conditioning function is terminated if the current system time is shifted behind the departure time.

[0057] Analogous to the second termination criterion, the air conditioning function is terminated if the current system time is shifted such that the departure time is more than the pre-start time Δt behind the shifted system time.

[0058] In addition, a recalculation of the function duration is carried out analogously in the event of a shift of the current system time in such a way that it is not behind the departure time and the departure time is not more than the first time period behind the shifted current system time.

[0059] If an error occurs when starting the climate control function or later when the climate control function is active, the climate control function will be terminated. If it is a one-time departure time, the one-time departure time will be deactivated, ie in the user interface in Fig. 2, the check mark is removed. The error is reported, for example, by the air conditioning unit equipped with a parking heater 4 to the climate control unit 3. For example, an error occurs if no fuel is available in the case of a fuel-powered parking heater.

Claims

[1] Method for stationary air conditioning of a vehicle interior of a parked motor vehicle, wherein a departure time (t AZ ) can be specified, at which the vehicle interior has a desired climate control state, with the steps: - Activating an air conditioning function to control the air conditioning of the vehicle interior for a first period of time (Δt) before the specified departure time (t AZ ); and - after activating the air conditioning function, premature cancellation of the air conditioning function depending - from a shift of the current system time (t I ). [2] Method according to claim 1, comprising the step: - after activating the air conditioning function, premature cancellation of the air conditioning function depending - from a postponement of the specified departure time (t AZ ), or - from deactivation of the preset departure time (t AZ ). [3] Method according to one of the preceding claims, comprising the step: - after activating the air conditioning function, premature cancellation of the air conditioning function - if the departure time (t AZ ) to a point in time (t' AZ ) before the current system time (f I ) or - when the current system time (t I ) behind the departure time (t AZ ). [4] Method according to one of the preceding claims, comprising the step: - after activating the air conditioning function, premature cancellation of the air conditioning function - if the departure time (t AZ) to a point in time (t'' AZ ) that is more than the first time period (Δt) starting from the current system time (t I ) in the future, or - when the current system time (t I ) such that the departure time is more than the first time period (Δt) behind the shifted current system time (t I ) lies. [5] Method according to claim 4, wherein after the premature termination of the air conditioning function, the air conditioning function has a first time period (Δt) before the changed [Disclosure eg: S6, Z25] departure time (t'' AZ ) is reactivated. [6] Method according to one of the preceding claims, comprising the step: after activating the air conditioning function, prematurely aborting the air conditioning function if the predetermined departure time (t AZ ) was deactivated, whereby ◯ after the departure time has elapsed without use, in particular without commissioning, of the vehicle, the interior is left for a certain follow-up time (Δt NZ ) will continue to be air-conditioned, and ◯ the air conditioning function is terminated prematurely if the specified departure time (t AZ ) has been deactivated before or alternatively until the departure time is reached, and the air conditioning function is not prematurely aborted when the specified departure time (t AZ ) was deactivated during the follow-up time period. [7] Method according to one of the preceding claims, wherein - the air conditioning function for controlling the air conditioning runs on an air conditioning control unit (3), - to activate the air conditioning function, the air conditioning control unit (3) determines the first time period (Δt) before the departure time (t AZ ) receives a wake-up signal from another control unit to wake up the climate control unit, - the climate control unit (3) has its own initial current system time (t I ) is used as long as the climate control unit (3) has not received the current system time from the first control unit (2) after waking up, and - the shift of the current system time occurs when the current system time is received from the first control unit (2). [8] Method according to one of the preceding claims, comprising the step: - if the departure time (t AZ ) or the current system time (f I ), recalculating a functional duration for the air conditioning function and / or a duration until the departure time (t AZ ) available time, if the departure time (t AZ ) or the current system time (t I ) the air conditioning function is not interrupted. [9] Method according to claim 3 and claim 4, wherein - if the departure time (t AZ ) to a point in time that is not earlier than the current system time (t I ) and which is no more than the first time period (Δt) starting from the current system time (t I ) in the future, or - when the current system time (t I ) in such a way that they do not fall behind the departure time (t AZ ) and the departure time (t AZ ) is not more than the first time period (Δt) behind the shifted current system time, the functional duration for the air conditioning function and / or the time until the departure time (t AZ ) is recalculated. [10] Method according to one of the preceding claims, wherein - several different departure times (t AZ ) can be specified and - after a previous departure time has elapsed, the operating time for the air conditioning function and / or the time available until the next departure time is recalculated if the previous departure time and the next departure time differ by less than the first time period (Δt). [11] Method according to one of the preceding claims, wherein after activation of the air conditioning function, the air conditioning function is paused or interrupted during use of the vehicle, in particular when the vehicle is put into operation, and is resumed when use is terminated. [12] The method of claim 11, wherein - the air conditioning function is only resumed when the vehicle is stopped if the departure time (t AZ ) has not yet been reached, and - after the departure time (t AZ) without use, in particular commissioning, of the vehicle, the interior for a certain follow-up time (Δt NZ ) should preferably continue to be air-conditioned. [13] Control device for stationary air conditioning of a vehicle interior of a parked motor vehicle, wherein a departure time (t AZ ) can be specified, at which the vehicle interior has a desired air conditioning state, comprising - a first control unit (2) and - a climate control unit (3), wherein - the first control device (2) is arranged to start a first time period (Δt) before the predetermined departure time (t AZ ) to wake up the climate control unit (3) so that the climate control unit (3) can then activate an air conditioning function for controlling the air conditioning of the vehicle interior; and - the climate control unit (3) is set up to prematurely terminate the climate control function after activation, depending on - from a shift of the current system time (t I ).

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