JP2011235807A - Device and method for air conditioning control for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for air conditioning control for a vehicle, which determines whether a pre-air conditioning operation is operable so that a cruising range of a vehicle reliably is extended.SOLUTION: An electronic control unit 4 performs the pre-air conditioning operation when the relation Q2>Q1+Q3 is satisfied at an estimated time of a start of the pre-air conditioning operation, and when the relation is not satisfied, delays a start of an air conditioning operation inside a cabin till a start of the vehicle driving operation, wherein: Q1 represents a charging rate of an in-vehicle battery; Q2 represents a power consumption of an air conditioner that is necessary for controlling the temperature inside the cabin to reach a set temperature of the air conditioner; and Q3 represents a power consumption of the air conditioner that is necessary for maintaining the temperature inside the cabin, which has reached the set temperature, at the set temperature.

Description

  The present invention relates to a vehicle air-conditioning control apparatus and an air-conditioning control method for performing pre-air-conditioning in a vehicle interior while charging a vehicle-mounted battery by an external power source.

  In an electric vehicle that travels by driving a motor with the power of the vehicle battery, the air conditioner is driven by the power of the vehicle battery in addition to the motor. For this reason, the use of the air conditioner while the vehicle is running is a factor that increases the power consumption of the in-vehicle battery and shortens the cruising distance of the vehicle. Therefore, during the charging of the on-board battery by the external power supply, the so-called pre-air conditioning that operates the air conditioner by operating the air conditioner with the power of the external power supply, that is, the cruising distance of the electric vehicle by using the air conditioner. It is considered to reduce the shortening.

  However, if pre-air conditioning is performed in preference to the charging of the in-vehicle battery by the external power source, the charging rate of the in-vehicle battery may be insufficient and the cruising distance of the vehicle may be shortened. Therefore, conventionally, in the vehicle air conditioning control device described in Patent Document 1, pre-air conditioning is performed if the charge rate of the in-vehicle battery at the scheduled start time of pre-air conditioning is equal to or greater than a predetermined determination value, otherwise pre-air conditioning is performed. By canceling, the in-vehicle battery is prevented from being insufficiently charged due to pre-air conditioning.

JP 2009-083567 A

  However, the charging speed of the in-vehicle battery and the required power for pre-air conditioning vary depending on the situation. Therefore, just looking at the charging rate of the in-vehicle battery at the scheduled start time of pre-air conditioning, it is advantageous to perform pre-air conditioning to ensure the vehicle cruising distance, or canceling the pre-air conditioning and charging the in-vehicle battery It is not possible to accurately determine whether it is advantageous to prioritize. Therefore, in the above-described conventional technique, the longer cruising distance may not be selected in determining whether or not to perform pre-air conditioning.

  Incidentally, such a problem is common to vehicles that run on the power of the in-vehicle battery, and also occurs in a hybrid vehicle that uses a motor as one of the drive sources.

  The present invention has been made in view of such circumstances, and a problem to be solved is air conditioning of a vehicle that can determine whether or not pre-air conditioning can be performed so that the cruising distance of the vehicle is reliably extended. A control device and an air conditioning control method are provided.

  The invention described in claim 1 is premised on an air conditioning control device for a vehicle that performs pre-air conditioning in the vehicle interior during charging of the in-vehicle battery by an external power source. In order to solve the above problems, the invention according to claim 1 is characterized in that the charging speed of the in-vehicle battery is “Q1”, and the power consumption of the air conditioner required to set the air conditioning inside the vehicle interior is “Q2”. When the power consumption of the air conditioner necessary for maintaining the passenger compartment at the set temperature at the set temperature is “Q3”, the pre-air conditioning is performed when “Q2> Q1 + Q3” is satisfied, When not established, the start of air conditioning in the passenger compartment is delayed until the start of vehicle operation.

  Here, the time required from the start of air conditioning until the passenger compartment is set to the set temperature is “Ta”. If it is desired to set the air-conditioning temperature inside the passenger compartment at the start of vehicle operation by pre-air conditioning, the pre-air conditioning is started before Ta at the start of vehicle operation. Here, assuming that the charging speed of the in-vehicle battery is “Q1” and the in-vehicle battery is not charged during pre-air conditioning, the charge amount of the in-vehicle battery at the start of operation when pre-air conditioning is performed Compared to the case where the charging is continued without performing, it is reduced by “Q1 × Ta”.

  When pre-air conditioning is not performed, air conditioning is started from the start of vehicle operation. At this time, the time required to change the passenger compartment to the set temperature for air conditioning is still Ta. Here, if the power consumption of the air conditioner at that time is “Q2”, the power consumption of the air conditioner required for setting the air conditioning in the passenger compartment is “Q2 × Ta”.

  On the other hand, when pre-air conditioning is performed, the air conditioner after the start of vehicle operation is operated to maintain the interior of the passenger compartment that has already reached the set temperature at that temperature. Here, if the power consumption of the air conditioner necessary for maintaining the temperature in the passenger compartment at this time is “Q3”, the power consumption necessary for the operation of the air conditioner until the time Ta has elapsed from the start of vehicle operation is , “Q3 × Ta”.

  Here, as described above, the amount of charge of the in-vehicle battery at the start of vehicle operation is “Q1 × Ta” more when not performing the pre-air conditioning, and the time Ta elapses from the start of vehicle operation. The power consumption of the air conditioner is “Q3 × Ta” when pre-air conditioning is performed, and “Q2 × Ta” when it is not performed. Therefore, the difference Δ between the charge amounts of the in-vehicle battery at the time when the time Ta has elapsed from the start of the vehicle operation when the pre-air conditioning is performed and when the pre-air conditioning is not performed is expressed by the following equation (1).

Δ = Q1 × Ta−Q2 × Ta + Q3 × Ta (1)

If the charge amount difference Δ is positive (ΔL> 0), the on-vehicle battery is charged when the time Ta has elapsed from the start of vehicle operation when pre-air conditioning is performed rather than when pre-air conditioning is not performed. The amount will increase. That is, when the following formula (2) is established, the cruising distance of the vehicle is extended when pre-air conditioning is performed rather than when pre-air conditioning is not performed.

Q1 * Ta-Q2 * Ta + Q3 * Ta> 0 (2)

From the above equation (2), the inequality of the following equation (3) can be derived.

Q2> Q1 + Q3 (3)

As described above, the cruising range of the vehicle is longer when the pre-air conditioning is performed than when the pre-air conditioning is not performed when the power consumption Q2 exceeds the sum of the charging speed Q1 and the power consumption Q3. . Therefore, when “Q2> Q1 + Q3” is satisfied, pre-air conditioning is performed, and when it is not satisfied, the start of air conditioning in the passenger compartment is delayed until the start of vehicle operation. It becomes possible to determine whether or not the pre-air-conditioning can be performed so as to be surely extended.

  Here, the power consumption Q2 can be said to be the power consumption of the air conditioner necessary for pre-air conditioning in the passenger compartment before the vehicle operation is started. The power consumption Q3 can be said to be the power consumption of the air conditioner when the room temperature is kept steady, that is, the power consumption of the air conditioner during the steady state. Therefore, according to claim 2, the charging speed of the in-vehicle battery is “Q1”, the power consumption of the air conditioner required for pre-air conditioning in the vehicle compartment before the start of vehicle operation is “Q2”, and the power consumption of the air conditioner in the normal state. Is set to “Q3”, the pre-air conditioning is performed when “Q2> Q1 + Q3” is satisfied when the on-vehicle battery is charged by the external power source, and the air conditioning of the vehicle interior is started after the vehicle operation is started when it is not satisfied. In this case, it is possible to determine whether or not the pre-air conditioning can be performed so that the cruising distance of the vehicle is reliably extended.

  Incidentally, as claimed in claim 3, during charging of the on-vehicle battery by the external power source, the charging speed Q1 can be obtained by actual measurement. The power consumption Q2 can be obtained by prediction based on the room temperature, the amount of solar radiation, and the outside air temperature, and the power consumption Q3 can be obtained by prediction based on the air conditioning set temperature, the amount of solar radiation, and the outside air temperature.

  On the other hand, in order to solve the above-mentioned problem, the invention according to claim 4 as a vehicle air-conditioning control method for pre-air-conditioning of the vehicle interior during charging of the on-vehicle battery by an external power source, sets the charging speed of the on-vehicle battery to “ Q1 ", the power consumption of the air conditioner necessary for setting the interior temperature of the passenger compartment to" Q2 ", and the consumption of the air conditioner required to maintain the interior temperature of the passenger compartment at the preset temperature. When the power is “Q3”, the step of determining whether or not “Q2> Q1 + Q3” is satisfied, and the pre-air-conditioning is performed when the determination is affirmative, and the air-conditioning of the passenger compartment is determined when the determination is negative. And a step of delaying the start of the vehicle until the start of vehicle operation.

  As described above, when “Q2> Q1 + Q3” is established, the cruising distance of the vehicle is longer when pre-air conditioning is performed than when it is not performed. Therefore, according to the method of the fourth aspect, it is possible to determine whether or not the pre-air conditioning can be performed so that the cruising distance of the vehicle is reliably extended.

  Further, as in the invention according to claim 5 as a vehicle air-conditioning control method, the charging speed of the in-vehicle battery is set to “Q1”, and the power consumption of the air-conditioning apparatus required for pre-air-conditioning in the vehicle interior before starting the vehicle operation is set to “Q2”. "When the power consumption of the air-conditioning apparatus in a steady state is set to" Q3 ", a step of determining whether or not" Q2> Q1 + Q3 "is satisfied when the vehicle battery is charged by an external power source is affirmed in the determination. The vehicle cruising distance is reliably extended even when the vehicle is provided with a step of delaying the start of the air conditioning in the passenger compartment until the start of vehicle operation when a negative determination is made. As described above, it is possible to determine whether or not the pre-air conditioning can be performed.

  By the way, the determination includes the step of obtaining the charging speed Q1 by actual measurement, the step of obtaining the power consumption Q2 by prediction based on the room temperature, the amount of solar radiation, and the outside temperature, the air conditioning set temperature, and the amount of solar radiation. And the step of obtaining the power consumption Q3 by prediction based on the outside air temperature, and using the three parameters obtained through the step.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic which shows typically the whole structure of the air-conditioning control apparatus about one Embodiment of this invention. The time chart which shows transition of the charge amount of the vehicle-mounted battery in each of the case where it does not perform pre air-conditioning, and room temperature. The flowchart which shows the process sequence of the pre air conditioning execution determination routine employ | adopted as the same embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment embodying an air conditioning control device and an air conditioning control method for a vehicle according to the present invention will be described in detail with reference to FIGS. In the present embodiment, the present invention is applied to a plug-in hybrid vehicle capable of charging an in-vehicle battery with an external power source.

  FIG. 1 shows an overall configuration of an air conditioning control device for a vehicle according to the present embodiment. The vehicle 1 shown in the figure is provided with an in-vehicle battery 2 and an electric compressor 3. The in-vehicle battery 2 stores electric power necessary for running the vehicle and operating the air conditioner. The electric compressor 3 is a part of an air conditioner that adjusts the room temperature, and pressurizes the refrigerant.

  The charging of the in-vehicle battery 2 and the operation of the electric compressor 3 are controlled by the electronic control unit 4. The electronic control unit 4 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and an input / output port (I / O). Here, the CPU performs arithmetic processing for charging control of the in-vehicle battery 2 and operation control of the electric compressor 3, and the ROM stores a control program and data. The RAM temporarily stores the calculation results of the CPU, the detection results of the sensors, etc., and the I / O functions as an interface for sending and receiving signals with the outside.

  Detection signals such as the charging rate (SOC) of the in-vehicle battery 2, the room temperature, the outside temperature, and the amount of solar radiation are input to the input port of the electronic control unit 4. Further, a control panel of the air conditioner is connected to the input port of the electronic control unit 4, and a signal such as a set temperature of the air conditioner is also input.

  Such a vehicle 1 is connected to an external power source 6 via a charging connector 5. In the vehicle 1, the in-vehicle battery 2 can be charged and the air conditioner can be operated by the electric power supplied from the external power source 6.

  In the vehicle 1 configured as described above, the electric compressor 3 and the like are driven by the electric power supplied from the external power source 6 to start air conditioning of the vehicle interior before the operation is started. Such pre-air conditioning is started from a scheduled start time calculated from an operation start time designated in advance by the driver. According to such pre-air conditioning, the cruising distance of the vehicle 1 may be extended by reducing the operation of the air conditioner after the start of operation and reducing the power consumption.

  However, depending on the situation, pre-air-conditioning may cause the in-vehicle battery 2 to be insufficiently charged, and the cruising distance of the vehicle 1 may be shortened. Therefore, in the present embodiment, the electronic control unit 4 determines whether pre-air conditioning is advantageous or non-advantageous in securing the cruising distance of the vehicle 1 at the scheduled start time of pre-air conditioning. Then, whether or not pre-air-conditioning can be performed is determined based on the result.

Hereinafter, the details of the pre-air-conditioning execution determination in this embodiment will be described.
FIG. 2 shows the amount of charge of the in-vehicle battery 2 and the transition of the room temperature of the vehicle 1 when pre-air conditioning is performed and when it is not performed. In the figure, for the sake of simplicity, the power required for running the vehicle 1 is set to “0”, and the power of the in-vehicle battery 2 after the start of operation is all used for air conditioning. Here, assuming that the operating time of the air conditioner necessary for setting the room temperature to be the set temperature of the air conditioning is “Ta”, the pre-air conditioning is from the time t1 that is back by the time Ta from the time t2 when the operation of the vehicle 1 is started. Just start.

  On the other hand, if pre-air conditioning is not performed, charging of the in-vehicle battery 2 is continued during the period from the time t1 to the time t2 when the operation of the vehicle 1 is started. If the charging speed of the in-vehicle battery 2 at this time, that is, the amount of power charged in the in-vehicle battery 2 per unit time is “Q1”, when pre-charging is not performed, the period from time t1 to time t2 is set. Therefore, the in-vehicle battery 2 is charged with the electric energy of “Q1 × Ta”.

  Here, during pre-air conditioning, if all of the electric power supplied from the external power supply 6 is used for air conditioning and the vehicle battery 2 is not charged, the charge amount of the vehicle battery 2 during pre air conditioning is It will not increase at all after the start time t1. Therefore, the charge amount of the in-vehicle battery 2 at the start of operation when pre-air conditioning is performed is smaller by “Q1 × Ta” than when the pre-air conditioning is not performed.

  When pre-air conditioning is not performed, the operation of the air conditioner is started from the start of operation of the vehicle 1. In this case, the room temperature of the vehicle 1 reaches the set temperature for air conditioning at time t3 when the time Ta has elapsed from time t2 when the operation of the vehicle 1 is started. Here, if the power consumption of the air conditioner necessary for setting the temperature inside the passenger compartment to air conditioning is “Q2,” the power consumption of the air conditioner during the period from time t2 to time t3 when pre-air conditioning is not performed is , “Q2 × Ta”.

  On the other hand, when pre-air conditioning is performed, since the room temperature is already set at the air conditioning temperature when the vehicle 1 is started, the power consumption of the air conditioner after the operation is started is higher than when the pre-air conditioning is not performed. Get smaller. Here, if the power consumption of the air conditioner necessary to maintain the interior of the passenger compartment that has reached the preset temperature is “Q3 (<Q2)”, from time t2 when pre-air conditioning is performed to time t3 The power consumption of the air conditioner during the period is “Q3 × Ta”.

  Here, as described above, the charge amount of the in-vehicle battery 2 at the start of the vehicle operation is “Q1 × Ta” when the pre-air-conditioning is not performed and when the time Ta elapses from the start of the vehicle operation. The power consumption of the air conditioner is “Q3 × Ta” when pre-air conditioning is performed, and “Q2 × Ta” when it is not performed. Therefore, the difference Δ between the charge amounts of the in-vehicle battery 2 at time t3 when pre-air conditioning is performed and when pre-air conditioning is not performed is expressed by the following equation (1).

Δ = Q1 × Ta−Q2 × Ta + Q3 × Ta (1)

If the charge amount difference Δ is positive (ΔL> 0), the on-vehicle battery is charged when the time Ta has elapsed from the start of vehicle operation when pre-air conditioning is performed rather than when pre-air conditioning is not performed. The amount will increase. That is, when the following formula (2) is established, the cruising distance of the vehicle is extended when pre-air conditioning is performed rather than when pre-air conditioning is not performed.

Q1 * Ta-Q2 * Ta + Q3 * Ta> 0 (2)

From the above equation (2), the inequality of the following equation (3) can be derived.

Q2> Q1 + Q3 (3)

As described above, the cruising range of the vehicle is longer when the pre-air conditioning is performed than when the pre-air conditioning is not performed when the power consumption Q2 exceeds the sum of the charging speed Q1 and the power consumption Q3. . Therefore, if “Q2> Q1 + Q3” is established, pre-air conditioning is performed, and if it is not established, the start of air conditioning in the passenger compartment is delayed until the start of vehicle operation, so that a longer cruising distance is secured. Whether or not pre-air conditioning can be performed can be determined.

  Incidentally, the above-mentioned power consumption Q2 can also be said to be the power consumption of the air conditioner necessary for pre-air conditioning in the vehicle compartment before the vehicle operation is started. The power consumption Q3 can also be referred to as the power consumption of the air conditioner when the room temperature is kept steady, that is, the power consumption of the air conditioner during steady state.

  FIG. 3 shows a flowchart of a pre-air-conditioning execution determination routine employed in this embodiment. The processing of this routine is repeatedly executed by the electronic control unit 4 every predetermined control period while being connected to the external power source 6.

  When this routine is started, it is first determined in step S100 whether it is the scheduled start time of pre-air conditioning. If it is determined that the pre-air conditioning start scheduled time is not reached (S100: NO), the process of this routine is terminated as it is. On the other hand, if it is the start time of pre-air conditioning (S100: YES), the process proceeds to step S101.

  When the process proceeds to step S101, the charging speed of the in-vehicle battery 2 is measured in step S101. In the subsequent step S102, the power consumption Q2 of the air conditioner necessary for setting the air conditioning inside the passenger compartment is predicted. The power consumption Q2 at this time is predicted based on the room temperature, the amount of solar radiation, and the outside air temperature. In further subsequent step S103, prediction of the power consumption Q3 of the air conditioner necessary for maintaining the passenger compartment at the preset temperature at the preset temperature is performed. The power consumption Q3 at this time is predicted based on the air conditioning set temperature, the amount of solar radiation, and the outside air temperature.

  When the measurement of the charging speed Q1 and the prediction of the power consumptions Q2 and Q3 are completed in this way, it is determined whether or not the inequality “Q2> Q1 + Q3” is satisfied in step S104. If the above inequality is satisfied (S104: YES), it is determined in step S105 that pre-air conditioning is to be performed, and if it is not satisfied, it is determined that pre-air conditioning is cancelled.

According to the vehicle air-conditioning control apparatus and the air-conditioning control method of the present embodiment described above, the following effects can be obtained.
(1) In the present embodiment, the charging speed of the in-vehicle battery 2 is “Q1”, the power consumption of the air conditioner necessary for setting the air conditioning in the vehicle interior is “Q2”, and the vehicle interior is at the preset temperature. When the power consumption of the air conditioner required to maintain the air temperature at the set temperature is “Q3”, pre-air conditioning is performed when “Q2> Q1 + Q3” is satisfied, and the air conditioning in the passenger compartment is started when it is not satisfied. Delays are made until the start of operation. As described above, the cruising distance of the vehicle 1 is longer when the pre-air conditioning is performed than when the pre-air conditioning is not performed when the power consumption Q2 exceeds the sum of the charging speed Q1 and the power consumption Q3. is there. Therefore, the pre-air conditioning is performed when “Q2> Q1 + Q3” is satisfied, and when the condition is not satisfied, the start of the air conditioning in the passenger compartment is delayed until the start of vehicle operation. It becomes possible to determine whether or not the pre-air-conditioning can be performed so as to be extended.

  (2) In the present embodiment, during charging of the in-vehicle battery 2 by the external power source 6, the charging speed Q1 is obtained by actual measurement. The power consumption Q2 is obtained by prediction based on the room temperature, the amount of solar radiation, and the outside air temperature, and the power consumption Q3 is obtained by prediction based on the air conditioning set temperature, the amount of solar radiation, and the outside air temperature. By obtaining the charging speed Q1 and the power consumptions Q2 and Q3 in this manner, it is possible to suitably perform the pre-air conditioning implementation determination as described above.

In addition, the said embodiment can also be changed and implemented as follows.
In the above embodiment, the charging speed Q1 of the in-vehicle battery 2 by the external power source 6 is obtained by actual measurement. However, the charging speed Q1 is predicted from the voltage of the external power source 6, the charging rate of the in-vehicle battery 2, and the like. It can also be.

  In the above embodiment, the power consumption Q2 is obtained by prediction based on room temperature, solar radiation amount, and outside temperature. Further, the power consumption Q3 is obtained by prediction based on the air conditioning set temperature, the amount of solar radiation, and the outside air temperature. The method of predicting these power consumptions Q2 and Q3 is not limited to this, and may be performed based on other parameters.

  In the above embodiment, whether or not pre-air conditioning is performed is determined based on whether or not the inequality “Q2> Q1 + Q3” is established, but the same applies to other inequality obtained by modifying the inequality. You may make it perform determination of. For example, the same determination can be made using an inequality such as “Q1−Q2 + Q3 <0” or an inequality such as “Q1 <Q2−Q3”.

  In the above embodiment, the case where the present invention is applied to a plug-in hybrid vehicle has been described. However, the present invention can also be applied to a plug-in electric vehicle.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Vehicle-mounted battery, 3 ... Electric compressor (air conditioner), 4 ... Electronic control unit, 5 ... Charge connector, 6 ... External power supply.

Claims (6)

In the vehicle air conditioning control device that performs pre-air conditioning of the vehicle interior while charging the on-vehicle battery by an external power source,
In order to maintain the charging speed of the in-vehicle battery at “Q1”, the power consumption of the air conditioner necessary to set the vehicle interior to the preset temperature for air conditioning, “Q2”, and the vehicle interior at the preset temperature at the preset temperature. When the power consumption of the air conditioner necessary for the vehicle is “Q3”, when “Q2> Q1 + Q3” is satisfied, the pre-air conditioning is performed, and when it is not satisfied, the start of the air conditioning in the vehicle interior is delayed until the vehicle operation starts. An air conditioning control device for a vehicle. When the charging speed of the in-vehicle battery is “Q1”, the power consumption of the air conditioner required for pre-air conditioning in the passenger compartment before starting the vehicle operation is “Q2”, and the power consumption of the air conditioner in the steady state is “Q3”, The vehicle air conditioning control is characterized in that when “Q2> Q1 + Q3” is satisfied when the on-vehicle battery is charged by an external power source, the pre-air conditioning is performed; otherwise, the air conditioning of the vehicle interior is started after the vehicle operation is started. apparatus. The charging speed Q1 is obtained by actual measurement, the power consumption Q2 is obtained by prediction based on room temperature, the amount of solar radiation, and the outside air temperature, and the power consumption Q3 is predicted based on the air conditioning set temperature, the amount of solar radiation, and the outside air temperature. The vehicle air-conditioning control device according to claim 1 or 2, wherein A control method for air conditioning in a vehicle that performs pre-air conditioning in a vehicle interior while charging an in-vehicle battery by an external power source,
In order to maintain the charging speed of the in-vehicle battery at “Q1”, the power consumption of the air conditioner necessary to set the vehicle interior to the preset temperature for air conditioning, “Q2”, and the vehicle interior at the preset temperature at the preset temperature. Determining whether or not “Q2> Q1 + Q3” is satisfied when the power consumption of the air conditioner necessary for the operation is “Q3”;
When the determination is affirmative, the pre-air conditioning is performed, and when the determination is negative, the start of the air conditioning in the passenger compartment is delayed until the start of vehicle operation;
An air conditioning control method for a vehicle, comprising: When the charging speed of the in-vehicle battery is “Q1”, the power consumption of the air conditioner required for pre-air conditioning in the passenger compartment before starting the vehicle operation is “Q2”, and the power consumption of the air conditioner in the steady state is “Q3”, Determining whether or not “Q2> Q1 + Q3” is satisfied when the vehicle battery is charged by an external power source;
When a positive determination is made in the determination, the pre-air conditioning is performed, and when a negative determination is made, the step of delaying the start of the air conditioning in the passenger compartment until the start of vehicle operation;
An air conditioning control method for a vehicle, comprising: Obtaining the charging speed Q1 by actual measurement;
Obtaining the power consumption Q2 by prediction based on room temperature, solar radiation and outside temperature;
Obtaining the power consumption Q3 by prediction based on an air conditioning set temperature, an amount of solar radiation, and an outside temperature;
A vehicle air conditioning control method according to claim 4 or 5.

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