Vehicle air conditioning control device

Abstract

The invention provides an air conditioner control device for a vehicle. The air-conditioning control device for the vehicle optimizes the set temperature and performs appropriate air-conditioning control according to the environment inside and outside the vehicle so as to improve the comfort of passengers. The vehicle air-conditioning control device controls a vehicle air-conditioning device mounted in a vehicle, supplies air whose temperature is adjusted on the basis of a set temperature into the vehicle, stores a recommended set temperature predetermined on the basis of an outside air temperature, and stores an off-time outside air temperature and an off-time set temperature when an ignition switch of the vehicle is off. When the ignition switch is turned on, if the difference between the current outside air temperature and the off-time outside air temperature is less than a predetermined value, the vehicle air-conditioning device is controlled on the basis of the off-time setting temperature, and if the difference between the current outside air temperature and the off-time outside air temperature is equal to or greater than the predetermined value, the vehicle air-conditioning device is controlled on the basis of the off-time setting temperature. The vehicle air-conditioning device is controlled on the basis of the recommended set temperature corresponding to the current outside air temperature.

Description

Technical Field

[0001] The present invention relates to a vehicle air-conditioning control device that is mounted on a vehicle and performs air conditioning in the vehicle. Background Art

[0002] In vehicle air conditioning systems, air conditioning control is usually performed by adjusting the temperature and air volume of the air supplied to the vehicle based on a temperature automatically set according to the temperature inside the vehicle or a temperature set by the vehicle occupants (set temperature), while referring to information indicating the environment inside and outside the vehicle, such as the outside temperature and the temperature inside the vehicle.

[0003] As an example of such a vehicle air conditioning system, for example, the vehicle air conditioning control device disclosed in Patent Document 1 selects the outside air temperature referenced during air conditioning control based on the time elapsed since the last engine stop (ignition switch OFF). Specifically, during engine startup (ignition switch ON), if the time elapsed since the last engine stop is less than a predetermined value, this vehicle air conditioning control device uses the outside air temperature stored at the time of the last engine stop. If the time elapsed is greater than the predetermined value, the outside air temperature measured at that time is used for air conditioning control.

[0004] Prior art literature Patent Literature Patent Document 1: Japanese Patent Application Laid-Open No. 2017-030376 Summary of the Invention

[0005] Technical issues In such a vehicle air conditioning device, for example, when the ignition switch of the vehicle is turned on, the device starts operating based on the set temperature stored when the ignition switch was last turned off, that is, starts air conditioning control.

[0006] However, when the vehicle's ignition switch is on, for example, if a long time has passed since the last time the ignition switch was turned off and the environment inside and outside the vehicle has changed, the air conditioning control based on the temperature set at the time of the last ignition switch off may be inappropriate, impairing passenger comfort. Furthermore, the perceived temperature and / or ideal interior temperature differ for each passenger, so air conditioning control based on the temperature set at the time of the last ignition switch off may not be appropriate for each passenger. Therefore, it is desirable to optimize the set temperature and perform appropriate air conditioning control based on the environment inside and outside the vehicle.

[0007] The present invention aims to address such a situation, that is, to optimize the set temperature and perform appropriate air-conditioning control according to the environment inside and outside the vehicle, thereby improving the comfort of the passengers.

[0008] Technical Solution In order to solve such problems, the present invention has the following configuration.

[0009] That is, one embodiment of the present invention provides a vehicle air-conditioning control device, which controls a vehicle air-conditioning device installed in a vehicle to supply air whose temperature is adjusted based on a set temperature into the vehicle, stores a recommended set temperature predetermined according to the outside temperature, and stores the outside temperature at the time of disconnection and the set temperature at the time of disconnection when the ignition switch of the vehicle is disconnected. When the ignition switch is turned on, if the difference between the current outside temperature and the outside temperature at the time of disconnection is less than a predetermined value, the vehicle air-conditioning device is controlled based on the set temperature at the time of disconnection; if the difference between the current outside temperature and the outside temperature at the time of disconnection is greater than a predetermined value, the vehicle air-conditioning device is controlled based on the recommended set temperature corresponding to the current outside temperature.

[0010] Technical Effects According to the vehicle air conditioning control device having such features, it is possible to optimize the set temperature and perform appropriate air conditioning control according to the environment inside and outside the vehicle, thereby improving the comfort of the vehicle occupants. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an explanatory diagram showing a schematic configuration of a vehicle control system including a vehicle air conditioning control device according to an embodiment of the present invention.

[0012] Figure 2 This is an example of a graph showing the ideal vehicle interior temperature Tref corresponding to the outside air temperature Tam for each vehicle occupant.

[0013] Figure 3 This is an example of a table showing the relationship between the recommended set temperature Tset_ref corresponding to the outside air temperature Tam and the ideal vehicle interior temperature Tref.

[0014] Figure 4 1 is a graph showing an example of the relationship among the current vehicle interior temperature Tr, the ideal vehicle interior temperature Tref, the deviation ΔTr, the recommended set temperature Tset_ref, and the correction value Ct.

[0015] Figure 5 : is a graph showing an example of the relationship between the current body surface temperature S of the occupant and the ideal body surface temperature Sref.

[0016] Figure 6 This is a flowchart showing the flow of processing for determining whether to use the set temperature Tset_OFF at the end of the previous operation or the recommended set temperature Tset_ref when determining the set temperature in the vehicle air conditioning control device according to the embodiment of the present invention.

[0017] Figure 7 It shows Figure 6 Flowchart of the process of step S114.

[0018] Explanation of symbols 1: Vehicle control system, 3: In-vehicle network, 4: CGW, 10: Vehicle air conditioning unit, 11: Air conditioning control ECU, 21, 31: ECU, 41: External temperature sensor, 42: In-vehicle temperature sensor, 43: In-vehicle camera, 100: Vehicle, 111: CPU, 112: ROM, 113: RAM. DETAILED DESCRIPTION

[0019] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same reference numerals in different figures represent parts with the same functions, and repeated descriptions in the figures will be omitted as appropriate.

[0020] like Figure 1 As shown, the vehicle air conditioning control device (air conditioning control ECU 11) of this embodiment functions as part of a vehicle control system 1 mounted on a vehicle 100. Vehicle control system 1 includes: a plurality of sensors that acquire various information indicating the driving state of vehicle 100, the internal and external conditions and / or environment of vehicle 100; various devices required for driving vehicle 100; and a plurality of ECUs (Electronic Control Units) that control these sensors and / or devices.

[0021] exist Figure 1 1 , the air conditioning control ECU 11, ECU 21, and ECU 31, which are vehicle air conditioning control devices, are shown among the plurality of ECUs, and illustration of the other ECUs is omitted. Furthermore, among the plurality of sensors and / or devices, an outside air temperature sensor 41 for detecting the outside air temperature of the vehicle 100, an inside air temperature sensor 42 for detecting the inside air temperature of the vehicle 100, and an inside air camera 43 for photographing the inside of the vehicle are shown, and illustration of the other sensors and / or devices is omitted.

[0022] In the present embodiment, detailed description and illustration of ECUs, sensors, and electronic devices that do not participate in the function of the vehicle air conditioning control device are omitted even if they are included in the vehicle control system 1 .

[0023] Sensors, devices, and ECUs are connected to each other via an in-vehicle network 3 such as CAN (Controller Area Network) or LIN (Local Interconnect Network) and a central gateway (CGW) 4 serving as a relay device so as to be able to communicate with each other.

[0024] In vehicle control system 1, information acquired by various sensors is output to in-vehicle network 3. Furthermore, information indicating the operating status of devices targeted for control (hereinafter referred to as "target devices") is output from each ECU to in-vehicle network 3. Furthermore, each ECU controls the operation of the target devices based on information acquired from the sensors and other ECUs via in-vehicle network 3.

[0025] Each ECU includes a processor, such as a CPU (Central Processing Unit) or an MPU (Microprocessing Unit), and circuits (hereinafter referred to as processors, etc.), and various processes are executed by the processors, etc. Each ECU also includes volatile storage elements such as RAM (Random Access Memory) to temporarily process data used by the processors, etc., and non-volatile storage elements such as ROM (Read Only Memory) to store programs executed by the processors, etc. It should be noted that some or all of the operations performed by each ECU can be implemented using hardware such as ASICs (Application Specific Integrated Circuits), FPGAs (Field-Programmable Gate Arrays), and GPUs (Graphics Processing Units).

[0026] like Figure 1 As shown, the air conditioning control ECU 11 is connected to the vehicle air conditioning unit 10 and performs air conditioning control based on the set temperature of the vehicle air conditioning unit 10. Specifically, the air conditioning control ECU 11 controls the vehicle air conditioning unit 10 to adjust the temperature of the air entering the vehicle air conditioning unit 10 and adjusts the amount of temperature-adjusted air supplied to the vehicle interior (air flow rate) to maintain the interior of the vehicle 100 at the set temperature.

[0027] The air conditioning control ECU 11 acquires the outside temperature Tam detected by the outside temperature sensor 41 , the vehicle interior temperature Tr detected by the vehicle interior temperature sensor 42 , and the vehicle interior image data captured by the vehicle interior camera 43 via the vehicle network 3 , and performs air conditioning control while referring to these.

[0028] The air-conditioning control ECU 11 includes a CPU 111 , a ROM 112 , and a RAM 113 . The CPU 111 executes various processes based on programs stored in the ROM 112 .

[0029] In the ROM 112 provided as a nonvolatile storage element, a program for controlling the vehicle air conditioner 10 and various data required for executing the program are stored.

[0030] As various data, the ROM 112 stores, for example, a recommended set temperature Tset_ref predetermined based on the ideal in-vehicle temperature Tref for each occupant and / or the outside temperature Tam corresponding to the outside temperature Tam, and other data referenced when automatically determining the set temperature Tset for air conditioning control.

[0031] The data stored in the ROM 112 will be described below.

[0032] (Data stored in ROM 112) The following describes data that is pre-stored in the ROM 112 and used when the air conditioning control ECU 11 automatically determines the set temperature Tset of the vehicle air conditioning device 10. In this embodiment, as examples of such data, at least (1) data indicating an ideal vehicle interior temperature Tref corresponding to the outside temperature for each vehicle occupant, and (2) data indicating a recommended set temperature Tset_ref corresponding to the outside temperature Tam and the ideal vehicle interior temperature Tref are stored in the ROM 112.

[0033] (1) Data on the ideal interior temperature Tref for each passenger corresponding to the outside temperature Tam The air conditioning control ECU 11 pre-stores data in the ROM 112 indicating the ideal vehicle interior temperature Tref corresponding to the outside temperature Tam for each passenger in the vehicle 100. The ideal vehicle interior temperature Tref represents the ideal temperature in the vehicle interior that is assumed to maintain comfort for each passenger. Even if the outside temperature Tam remains the same, the thermal sensation and perceived temperature vary from passenger to passenger, and therefore the ideal vehicle interior temperature Tref also varies from passenger to passenger. Therefore, by utilizing data corresponding to the outside temperature Tam and the ideal vehicle interior temperature Tref for each passenger, it is possible to determine the optimal set temperature Tset for each passenger.

[0034] Figure 2 An example of a graph showing the ideal vehicle interior temperature Tref corresponding to the outside temperature Tam for each vehicle occupant is shown. Figure 2 In the example of FIG, the relationship between the outside temperature Tam and the ideal vehicle interior temperature Tref of each of the three passengers D1, D2, and D3 is shown. Figure 2 , the ideal in-vehicle temperature data of passenger D1 is represented by a hollow circle, the ideal in-vehicle temperature data of passenger D2 is represented by a hollow quadrilateral, and the ideal in-vehicle temperature data of passenger D3 is represented by a hollow diamond.

[0035] exist Figure 2 For example, it can be seen that when the outside temperature Tam is -30°C, the ideal interior temperature Tref for passenger D1 is 26°C, the ideal interior temperature Tref for passenger D2 is 28°C, and the ideal interior temperature Tref for passenger D3 is 30°C. Figure 2 The chart can help each passenger understand the ideal vehicle interior temperature Tref corresponding to the outside temperature Tam.

[0036] The data representing the ideal vehicle interior temperature Tref corresponding to the outside temperature Tam for each passenger can be obtained by calculation based on, for example, at least one of the set temperature Tset set when the passengers D1, D2, and D3 use the vehicle air conditioning device 10 in the vehicle 100, the temperature adjustment operation performed manually, etc.

[0037] (2) Data indicating the recommended set temperature Tset_ref corresponding to the outside air temperature Tam and the ideal interior temperature Tref While the air conditioning control ECU 11 can directly use the occupant's ideal vehicle interior temperature Tref as the set temperature Tset to control the vehicle air conditioning system 10, by increasing the set temperature Tset as the outside temperature Tam decreases and decreasing the set temperature Tset as the outside temperature Tam increases, the vehicle interior can reach the ideal vehicle interior temperature Tref sooner, thereby improving the comfort of the occupants. Therefore, the air conditioning control ECU 11 pre-stores data in the ROM 112 indicating the recommended set temperature Tset_ref corresponding to the outside temperature Tam and the ideal vehicle interior temperature Tref.

[0038] Figure 3 An example of a table showing the relationship between the outside air temperature Tam and the ideal vehicle interior temperature Tref is shown. Figure 3 In the example, it can be seen that it is preferable to set the recommended set temperature Tset_ref to 25.5°C when the external temperature Tam is 5°C and the ideal vehicle interior temperature Tref is 25°C, and it is preferable to set the recommended set temperature Tset_ref to 28.5°C when the external temperature Tam is 5°C and the ideal vehicle interior temperature Tref is 28°C.

[0039] Such a recommended set temperature Tset_ref corresponding to the outside air temperature Tam and the ideal vehicle interior temperature Tref is preferably determined by, for example, the specifications and performance of the vehicle air conditioning device 10, the volume of the vehicle 100 and the area of ​​the windows provided in the vehicle 100, and is calculated in advance and stored in the ROM 112.

[0040] The RAM 113, which is a volatile storage element, is used as a work area when the CPU 111 executes various processes. Therefore, the outside temperature Tam, the vehicle interior temperature Tr, and the vehicle interior image data acquired via the vehicle network 3 are temporarily stored in the RAM 113 as needed.

[0041] The CPU 111 controls the vehicle air conditioner 10 by reading a program stored in the ROM 112 into a memory such as the RAM 113 and executing the program.

[0042] Specifically, the CPU 111 controls the vehicle air conditioner 10 as follows.

[0043] When the operation of the vehicle air conditioning device 10 ends (including the case where the operation of the vehicle air conditioning device 10 ends simultaneously with the ignition switch of the vehicle 100 being turned off), the CPU 111 temporarily stores the outside temperature Tam_OFF at the end of the operation and the set value for the vehicle air conditioning device 10 in the ROM 112 or RAM 113.

[0044] The set values ​​for the vehicle air conditioner 10 at the end of operation include, for example, a set temperature Tset_OFF, the temperature of the air delivered to the vehicle interior (target outlet temperature TAO), and the air volume. The CPU 111 can appropriately determine which set value to store. Here, the CPU 111 stores at least the set temperature Tset_OFF as the set value for the vehicle air conditioner 10.

[0045] When receiving an operation start instruction for the vehicle air conditioner 10 (including a case where the operation start instruction for the vehicle air conditioner 10 is received simultaneously with turning on the ignition switch of the vehicle 100 ), the CPU 111 determines a set temperature Tset at the start of operation.

[0046] Specifically, when an operation start instruction is input to the vehicle air conditioner 10, the CPU 111 obtains at least temperature information from the status information indicating the internal and external conditions of the vehicle 100 and determines the set temperature Tset at the start of operation based on the temperature information. Specifically, the CPU 111 obtains the outside temperature Tam_OFF stored at the last completion of operation of the vehicle air conditioner 10 as the temperature information from the status information, and obtains the current outside temperature Tam detected by the outside temperature sensor 41 via the in-vehicle network 3.

[0047] Furthermore, if the outside temperature Tam_OFF is considered equal to the outside temperature Tam, that is, if the difference ΔTam between the outside temperature Tam_OFF and the outside temperature Tam is less than a predetermined value Tdif, the vehicle air conditioner 10 is controlled based on the set temperature Tset_OFF stored at the end of the previous operation. On the other hand, if the outside temperature Tam_OFF at the end of the previous operation cannot be considered equal to the outside temperature Tam, that is, if the difference ΔTam between the outside temperature Tam_OFF and the outside temperature Tam is greater than the predetermined value Tdif, the vehicle air conditioner 10 is controlled based on the recommended set temperature Tset_ref corresponding to the current outside temperature Tam.

[0048] It should be noted that when determining whether to use the stored set temperature Tset_OFF as the set temperature Tset at the start of the action, as temperature information, not only the current outside temperature Tam and the stored outside temperature Tam_OFF can be referred to, but also the vehicle interior temperature Tr and the status of the passengers can be referred to.

[0049] The CPU 111 also obtains at least occupant information indicating the state of the occupant and vehicle interior temperature information from the state information indicating the interior and exterior states of the vehicle 100 , and corrects the recommended set temperature Tset_ref based on the state information if correction is necessary.

[0050] The status information includes, for example, image data of the vehicle interior captured by the interior camera 43 and the vehicle interior temperature Tr detected by the vehicle interior temperature sensor 42. The CPU 111 calculates a corrected recommended set temperature Tset_co, which is a correction of the recommended set temperature Tset_ref, based on the body surface temperature of the occupant acquired from the image data and the vehicle interior temperature Tr, and controls the vehicle air conditioner 10 based on the corrected recommended set temperature Tset_co.

[0051] For example, the CPU 111 determines whether the recommended set temperature Tset_ref needs to be adjusted based on the degree of deviation ΔTr between the current vehicle interior temperature Tr and the recommended set temperature Tset_ref (or the ideal vehicle interior temperature Tref). The larger the deviation ΔTr, the longer it takes for the vehicle interior temperature to reach the recommended set temperature Tset_ref, potentially impairing occupant comfort. Therefore, the CPU 111 improves occupant comfort by adjusting the recommended set temperature Tset_ref based on the deviation ΔTr.

[0052] Figure 4 FIG. 1 shows a graph showing an example of the relationship between the current vehicle interior temperature Tr, the ideal vehicle interior temperature Tref, the deviation ΔTr, the recommended set temperature Tset_ref, and the correction value Ct. Figure 4As shown, the larger the deviation ΔTr, the larger the correction value Ct. Therefore, when the deviation ΔTr is greater than a predetermined value, the CPU 111 corrects the recommended set temperature Tset_ref using the correction value Ct obtained based on the deviation ΔTr, thereby calculating the corrected recommended set temperature Tset_co. Note that when the deviation ΔTr is less than the predetermined value, it is determined that the recommended set temperature Tset_ref does not need to be corrected based on the deviation ΔTr.

[0053] Furthermore, in addition to the deviation ΔTr, the need to adjust the recommended set temperature Tset_ref can also be determined based on, for example, the occupant's body surface temperature S. Specifically, the need to adjust the recommended set temperature Tset_ref is determined based on the degree of deviation ΔS between the occupant's current body surface temperature S and the ideal body surface temperature Sref.

[0054] Figure 5 An example of the relationship between the current body surface temperature S of a passenger and the ideal body surface temperature Sref is shown. When the deviation ΔS is greater than a predetermined value, the CPU 111 corrects the recommended set temperature Tset_ref using the correction value Cs obtained based on the deviation ΔS, thereby calculating a corrected recommended set temperature Tset_co. Note that when the deviation ΔS is less than the predetermined value, it is determined that no correction of the recommended set temperature Tset_ref based on the deviation ΔS is necessary.

[0055] Alternatively, it is possible to use both the deviation ΔTr and the deviation ΔS to determine whether the recommended set temperature Tset_ref needs to be corrected. In this case, the correction value Ct and the correction value Cs are used to correct the recommended set temperature Tset_ref. If the correction value Ct and the correction value Cs cancel each other out, it is determined that the recommended set temperature Tset_ref does not need to be corrected.

[0056] use Figure 6 and Figure 7 The flowchart of FIG. 1 will explain the processing in the air-conditioning control ECU 11 configured in this manner. Figure 6 The flowchart of the process for determining whether to use the set temperature Tset_OFF at the end of the previous operation or the recommended set temperature Tset_ref when determining the set temperature is shown. Figure 7 Indicates based on Figure 6 The flow of the process of calculating the set temperature Tset by the recommended set temperature Tset_ref in step S114 in the flowchart of FIG.

[0057] like Figure 6As shown, when the ignition switch of vehicle 100 is turned on and an instruction to start operation of vehicle air conditioner 10 is received, air conditioning control ECU 11 starts up and acquires temperature information (step S111). Here, air conditioning control ECU 11 acquires the current outside temperature Tam as temperature information via in-vehicle network 3 and reads the outside temperature Tam_OFF stored at the previous end of operation.

[0058] The air conditioning control ECU 11 calculates the difference ΔTam between the outside temperature Tam_OFF and the outside temperature Tam (step S112) and determines whether the difference ΔTam is greater than or equal to a predetermined value Tdif (step S113). If the difference ΔTam between the outside temperature Tam_OFF and the outside temperature Tam is greater than or equal to the predetermined value Tdif (YES in step S113), the air conditioning control ECU 11 calculates the set temperature Tset based on the recommended set temperature Tset_ref corresponding to the current outside temperature Tam (step S114). When the air conditioning control ECU 11 enters step S114, it discards the set temperature Tset_OFF stored at the end of the previous operation (marking it as unused data or deleting it from the storage unit).

[0059] On the other hand, if the difference ΔTam is less than the predetermined value Tdif (No in step S113), the set temperature Tset_OFF stored at the end of the previous operation is determined as the set temperature Tset (step S116). If the set temperature Tset is determined in step S114 or step S116, air conditioning control of the vehicle air conditioner 10 is started at the determined set temperature Tset (step S115).

[0060] Next, refer to Figure 7 Flowchart based on Figure 6 The calculation process of the set temperature Tset of the recommended set temperature Tset_ref corresponding to the current outside air temperature Tam in step S114 will be described.

[0061] like Figure 7 As shown, the air conditioning control ECU 11 obtains the occupant information indicating the state of the occupant and the vehicle interior temperature information from the state information (step S211). The state information indicates the state of the interior and exterior of the vehicle 100. If the occupant of the vehicle 100 is determined based on the occupant information obtained in step S211, the occupant information corresponding to the state in step S211 is read. Figure 6 The ideal in-vehicle temperature Tref corresponding to the current outside temperature Tam acquired in step S111 is read (step S212). Then, the recommended set temperature Tset_ref determined by the ideal in-vehicle temperature Tref and the current outside temperature Tam is read (step S213).

[0062] Next, the air conditioning control ECU 11 determines whether the read recommended set temperature Tset_ref needs to be corrected (step S214). As described above, the determination of whether correction is necessary can be based on, for example, at least one of the degree of deviation ΔTr between the current vehicle interior temperature Tr and the recommended set temperature Tset_ref (or the ideal vehicle interior temperature Tref), and the degree of deviation ΔS between the current body surface temperature S of the occupant and the ideal body surface temperature Sref.

[0063] If it is determined that correction is not necessary (No in step S214), the recommended set temperature Tset_ref is directly determined as the set temperature Tset (step S218). On the other hand, if it is determined that correction of the recommended set temperature Tset_ref is necessary (Yes in step S214), at least one of a correction value Ct and a correction value Cs is calculated (step S215), and the recommended set temperature Tset_ref is corrected using this correction value Ct or Cs (step S216). If the correction of the recommended set temperature Tset_ref results in a corrected recommended set temperature Tset_co, this corrected recommended set temperature Tset_co is determined as the set temperature Tset (step S217).

[0064] Thus, according to the air conditioning control ECU 11 (vehicle air conditioning control device) of the above-described embodiment, if the conditions inside and outside the vehicle 100 have not changed since the last operation of the vehicle air conditioning device 10, the set temperature Tset_OFF stored at the end of that operation is utilized. On the other hand, if the conditions inside and outside the vehicle 100 have changed since the last operation of the vehicle air conditioning device 10, the set temperature Tset is determined based on the change. This allows the set temperature to be optimized, enabling appropriate air conditioning control to be performed according to the vehicle's internal and external environments, thereby improving occupant comfort.

[0065] While the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the specific configuration is not limited to these embodiments, and design modifications, etc., that do not depart from the spirit of the present invention are also encompassed by the present invention. Furthermore, the aforementioned embodiments can be combined using the same techniques as long as there are no particular contradictions or problems in their objectives and structures.

Claims

1. A vehicle air conditioning control device, characterized in that: The vehicle air conditioner mounted on the vehicle is controlled to supply air whose temperature is adjusted based on a set temperature into the vehicle interior. The vehicle air conditioning control device stores a recommended set temperature predetermined according to the outside temperature. When the ignition switch of the vehicle is turned off, the vehicle air conditioning control device stores the off-time outside temperature and the off-time set temperature. When the ignition switch is turned on, if the difference between the current outside air temperature and the outside air temperature at disconnection is less than a predetermined value, the vehicle air conditioning control device controls the vehicle air conditioning device based on the set temperature at disconnection; and if the difference between the current outside air temperature and the outside air temperature at disconnection is greater than a predetermined value, the vehicle air conditioning control device controls the vehicle air conditioning device based on the recommended set temperature corresponding to the current outside air temperature.

2. The vehicle air conditioning control device according to claim 1, wherein: The vehicle air conditioning control device acquires environmental information based on the external environment of the vehicle and the internal environment of the vehicle. When the ignition switch is turned on, if the difference between the current outside air temperature and the outside air temperature when the ignition switch is turned off is greater than a predetermined value, the vehicle air conditioning control device controls the vehicle air conditioning device based on a corrected set temperature, where the corrected set temperature is obtained by correcting the recommended set temperature corresponding to the current outside air temperature using the environmental information.

3. The vehicle air conditioning control device according to claim 2, wherein: The environmental information is the body surface temperature of the vehicle occupant, The vehicle air conditioning control device acquires the body surface temperature based on imaging data captured by a camera that captures an image of the interior of the vehicle.

4. The vehicle air conditioning control device according to claim 1, wherein: The recommended set temperature is determined based on the ideal vehicle interior temperature determined for each vehicle occupant and the outside air temperature.

5. The vehicle air conditioning control device according to claim 4, wherein: The ideal vehicle interior temperature is determined for each vehicle occupant according to the outside air temperature and is determined based on at least one of a set temperature set by the vehicle occupant and a temperature adjustment operation performed by the vehicle occupant.

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