JP3327105B2 - Vehicle air conditioning controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning control device for a vehicle, and more particularly, to an air conditioning control device for a vehicle that requires information on an outside air temperature for control.

[0002]

2. Description of the Related Art Conventionally, outside air temperature information required for air conditioning control is as follows.
It was obtained as the output of the outside air temperature sensor. The outside air temperature sensor is generally mounted on the back of a vehicle bumper.

[0003]

However, in the above-mentioned conventional example, the outside air temperature sensor is affected by the radiant heat from the engine, causing an error in the detected value and sometimes an inadequate air conditioning control is not performed. there were. Further, there is a demand for a reduction in the price of a vehicle air conditioning system.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle air-conditioning control apparatus which solves the disadvantages of the prior art and realizes air-conditioning control of the same quality as before without using an outside air temperature sensor. And

[0005]

In order to achieve the above object, according to the first aspect of the present invention, an inside air temperature sensor for detecting a temperature in a vehicle cabin, and at least a detected value of the inside air temperature sensor and information on a predetermined outside air temperature. And an air-conditioning control unit that performs air-conditioning control based on the air conditioner. In addition, a memory that stores at least a preset outside air temperature estimation value before the vehicle stops and a detection value of the inside air temperature sensor when the vehicle stops, and a timer that measures the time from the vehicle stop to the vehicle start are provided. A temperature estimating unit.

Further, the outside air temperature estimating section predicts whether or not the detected value of the inside air temperature sensor at the time of starting the vehicle is equal to the actual outside air temperature at the time of starting the vehicle. If it is predicted that the detected value at the time of starting the vehicle is equal to the actual outside temperature at the time of starting the vehicle, the detected value of the inside air temperature sensor at the time of starting the vehicle or a value obtained by applying a predetermined correction to the detected value is used as the outside temperature after starting the vehicle. A first method of setting an estimated value and outputting the estimated outside temperature value as information of the outside temperature;
If the estimated value of the inside air temperature sensor at the time of starting the vehicle is predicted to be not equal to the actual outside air temperature at the time of starting the vehicle, at least the detected value of the inside air temperature sensor at the time of starting the vehicle, the inside air temperature Calculates the estimated outside air temperature after the vehicle is started based on the detection value of the sensor when the vehicle is stopped, the estimated outside air temperature before the vehicle is stopped, and the measured time from when the vehicle is stopped to when the vehicle is started. A second estimated value calculation function that outputs the information as outside temperature information,
The configuration is adopted.

According to the present invention, when the vehicle is started, the outside air temperature estimating section determines whether or not the detected value of the inside air temperature sensor at the time of starting the vehicle is equal to the outside air temperature. The detected value or a value obtained by performing a predetermined correction on the detected value is used as the estimated outside air temperature. On the other hand, if not equal, at least the detection value of the inside air temperature sensor when the vehicle starts, the detection value of the inside air temperature sensor when the vehicle stops, the estimated outside air temperature before the vehicle stops, and An estimated outside air temperature is calculated based on the measurement time. Then, the air conditioning control unit performs air conditioning control based on the estimated outside air temperature.

[0010] According to the second aspect of the present invention, an internal air temperature sensor for detecting the temperature in the vehicle interior, a solar radiation sensor for detecting the amount of solar radiation in the vehicle interior, at least the detected value of the internal air temperature sensor, the detected value of the solar radiation sensor, and An air-conditioning control unit that performs air-conditioning control based on information on a predetermined outside air temperature. A memory storing a preset outside air temperature estimation value before the vehicle stops, a detection value of the inside air temperature sensor when the vehicle stops, and a detection value of the solar radiation sensor when the vehicle stops, from a time when the vehicle stops to a time when the vehicle starts. And an outside air temperature estimating unit equipped with a timer for measuring the time.

Further, the outside air temperature estimating section predicts whether or not the detected value of the inside air temperature sensor at the time of starting the vehicle is equal to the actual outside air temperature at the time of starting the vehicle. If it is predicted that the detected value at the time of starting the vehicle is equal to the actual outside temperature at the time of starting the vehicle, the detected value of the inside air temperature sensor at the time of starting the vehicle or a value obtained by applying a predetermined correction to the detected value is used as the outside temperature after starting the vehicle. A first method of setting an estimated value and outputting the estimated outside temperature value as information of the outside temperature;
Calculating the estimated value of the inside air temperature sensor at the time of starting the vehicle, and detecting the detected value of the inside air temperature sensor at the time of starting the vehicle. Of the vehicle when the vehicle stops, the value detected by the solar radiation sensor when the vehicle starts, the value detected by the solar radiation sensor when the vehicle stops, the estimated outside air temperature before the vehicle stops, and the measurement time from when the vehicle stops to when the vehicle starts. A second estimated value calculating function of calculating an estimated outside air temperature after the vehicle is started based on the calculated value and outputting the estimated outside air temperature as information of the outside air temperature.

According to the present invention, when the vehicle is started, the outside air temperature estimating section determines whether or not the detected value of the inside air temperature sensor at the time of starting the vehicle is equal to the outside air temperature. The detected value or a value obtained by performing a predetermined correction on the detected value is used as the estimated outside air temperature. On the other hand, if they are not equal, the detection value of the inside air temperature sensor when the vehicle starts, the detection value of the inside air temperature sensor when the vehicle stops, the detection value of the solar radiation sensor when the vehicle starts, the detection value of the solar radiation sensor when the vehicle stops, The estimated outside air temperature is calculated based on the estimated outside air temperature before the vehicle stops and the measured time from when the vehicle stops to when the vehicle starts. Then, the air conditioning control unit performs air conditioning control based on the estimated outside air temperature.

Accordingly, the above-mentioned object is to be achieved.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG.

The air conditioning control device for a vehicle shown in FIG. 1 has an internal air temperature sensor 1b for detecting the temperature in the passenger compartment, and an air conditioner for performing air conditioning control based on the detected value of the internal air temperature sensor 1b and information on a predetermined external air temperature. And a control unit 4. The vehicle air conditioning control device shown in FIG. 1, a memory 3 for storing the detected value theta _{IN 0} when the vehicle is stopped in the preset vehicle stopped before the outside air temperature estimate theta _S and the inside air temperature sensor 1b, the vehicle stops And an outside air temperature estimating unit 2 equipped with a timer 2a for measuring a time t from time to the start of the vehicle.

The outside temperature estimating unit 2 includes a prediction function for predicting whether or not the detected value θ _IN of the inside temperature sensor 1b at the time of starting the vehicle is equal to the actual outside temperature at the time of starting the vehicle, If the detected value theta _iN when the vehicle start-up of the sensor 1b is predicted to be equal to the outside air temperature of reality during the vehicle start, the detection value theta _iN when the vehicle start-up of the inside air temperature sensor 1b outside air temperature estimation after vehicle start A first estimated value calculating function of setting the value to the value θ _S and outputting the estimated outside air temperature value θ _S as information of the outside air temperature.

In addition, the outside air temperature estimating section 2 determines at least the inside air temperature sensor when the detected value θ _IN of the inside air temperature sensor 1b at the time of starting the vehicle is not equal to the actual outside air temperature at the time of starting the vehicle. 1b, the detected value θ _IN when the vehicle starts, the detected value θ _{IN0 of} the internal temperature sensor 1b when the vehicle stops, the estimated outside air temperature θ _S before the vehicle stops, and the measurement time t from when the vehicle stops to when the vehicle starts. the outside air temperature estimate calculated the outside air temperature estimate theta _S after vehicle start based theta
_A second estimated value calculation function for outputting _S as information on the outside air temperature is provided.

More specifically, in this embodiment, the internal temperature sensor 1b is provided in the input unit 1. The input unit 1 is provided with an ignition switch 1a for starting and stopping the vehicle and a water temperature sensor 1c for detecting the temperature of the engine cooling water, in addition to the internal temperature sensor 1b. The starting operation and the stopping operation of the engine by the ignition switch 1a, the detection value of the inside air temperature sensor 1b, and the detection value of the water temperature sensor 1c are respectively input to the outside air temperature estimation unit 2.

The outside air temperature estimating section 2 is constituted by a microcomputer, and is configured to realize various processes including calculation of an outside air temperature estimated value θ _S by executing a micro program. Details of the processing operation performed by the outside air temperature estimating unit 2 will be described later.

A memory 3 attached to the outside air temperature estimating unit 2 is a rewritable nonvolatile memory, for example, EEPRO.
M, NVRAM, and the like, in which the estimated outside air temperature value θ _S and the detected value θ _IN0 of the inside air temperature sensor 1b when the vehicle is stopped are stored.

The air-conditioning control unit 4 is a conventional general air-conditioning control unit that calculates a blow-out temperature, calculates a blower air volume, and outputs control signals to various control targets such as an air mix damper. On the other hand, the configuration differs from the conventional general air-conditioning control unit in that the estimated value of the outside air temperature θ _S is used instead of the detection value of the outside air temperature sensor, thereby calculating the operation amount for each control target. It is.

Next, the overall operation of the present embodiment will be described with reference to FIGS. In the following description, the detection value of the inside air temperature sensor 1b will be abbreviated as the inside air temperature detection value, the detection value of the water temperature sensor 1c will be referred to as the water temperature detection value, and the time from the start of the vehicle to the stop of the vehicle will be referred to as the parking time. Shall be.

The variables and units used in the following description are as follows. θ _S [° C]: estimated outside air temperature θ _IN0 [° C.]: detected internal air temperature when the vehicle is stopped θ _IN [° C.]: detected internal air temperature when the vehicle is started θ _OUT [° C.]: provisional external air temperature T _W [ ° C]: Detected water temperature at vehicle start W [kcal / h ° C]: Heat loss coefficient in vehicle interior Q [kcal / ° C]: Heat capacity in vehicle interior t [h]: Parking time k ₁ : Coefficient

When the ignition switch 1a is operated and the vehicle is set to the starting state, the outside air temperature estimating section 2 stops the timer 2a which has measured the time t from the previous stop of the vehicle to the start of the current vehicle ( Step S21).
Then, the inside air temperature detection value of the outside air temperature estimate theta _S and the previous vehicle stop which has been used during the previous vehicle operation from the memory 3 theta
Reads the _{IN 0} (step S22), and receives an input of the inside air temperature detection value theta _IN and water temperature detection value T _W during vehicle start (step S23).

[Prediction function of outside temperature estimation unit]

Subsequently, the outside air temperature estimating section 2 outputs the detected water temperature T
It is determined whether _W is not less than 50 [° C.] (step S24). As a result, if the 50 [℃] or higher, it is determined that there is from the last vehicle stop state elapsed time is short cabin is still conditioned to date, the inside air temperature detection value theta _IN during vehicle start out Predict not to be equal to temperature. On the other hand, when the detected water temperature value T _W is less than 50 ° C., it is determined that a sufficient time has elapsed since the last stop of the vehicle, and
The inside air temperature detection value θ _IN at the time of starting the vehicle is predicted to be equal to the outside air temperature.

Here, whether or not the detected inside air temperature value θ _IN at the time of starting the vehicle is equal to the outside air temperature is predicted by judging whether or not the parking time t measured by the timer 2a is, for example, one hour or more. May be done.

[Estimation value calculation function of outside air temperature estimation unit]

If the detected water temperature T _W is 50 ° C. or more, that is, if it is predicted that the detected inside air temperature θ _IN at the time of starting the vehicle is not equal to the outside air temperature, the following equation (1) is used. The temperature θ _OUT is calculated (step S25).

[0028]

(Equation 1)

The above equation (1) is derived from the general equation of thermodynamics shown in equation (2) through the following process.

[0030]

(Equation 2)

When t = 0, the initial conditions are H = 0, θ = θ
By solving equation (2) assuming ₀ ,

[0032]

(Equation 3)

In equation (3), θ = θ _IN −θ _OUT , θ ₀
= Θ _IN0 −θ _S is substituted to obtain the above-described calculation formula of the provisional outside air temperature θ _OUT .

Next, the outside air temperature estimating section 2 calculates an outside air temperature estimated value θ _S by the following equation (4) (step S26).

Θ _S = k ₁ θ _OUT + (1−k ₁ ) θ _S Equation (4)

Here, 0 <k ₁ ≦ 1, for example, k ₁
= 0.5 may be set. Further, θ _{S on} the right side is the estimated outside air temperature during the previous operation of the vehicle stored in the memory 3. Best in the first state the device is operating, but the optimum ambient temperature estimate in the memory 3 is not stored, such a case, predicted that the inner air temperature detection value theta _IN and outside temperature during normal vehicle start is equal to Therefore, the processing after step S27 is performed.

After calculating the estimated outside temperature θ _S , the outside temperature estimation unit 2 updates the estimated value θ _S in the memory 3 (step S 28), and outputs the estimated outside temperature θ _S to the air conditioning control unit 4. (Step S29).

On the other hand, in step S24, when the detected water temperature value T _W is less than 50 ° C., that is, when it is predicted that the detected inside air temperature value θ _IN at the time of starting the vehicle is equal to the outside air temperature, The inside temperature detection value θ _IN is used as the outside temperature estimation value θ _S (step S27), and the processing from step S28 described above is executed. Here, the outside air temperature estimation value θ _S may be a value obtained by performing a predetermined correction on the inside air temperature detection value θ _IN .

The air-conditioning control unit 4 executes various air-conditioning control processes during operation of the vehicle by using the outside air temperature estimation value θ _S input from the outside air temperature estimation unit 2 instead of the detection value of the conventional outside air temperature sensor. I do.

[Process of External Temperature Estimation Unit when Vehicle Stops]

When the ignition switch 1a is operated,
When the vehicle is stopped, the outside air temperature estimating unit 2 updates the detected value θ _IN0 of the inside air temperature sensor 1b when the vehicle is stopped in the memory 3 (Step S31). Then, in order to measure the parking time t from the time when the vehicle stops to the time when the next vehicle starts, the timer 2a starts counting time.

According to this embodiment described above, for example, when a vehicle that has been left in a parking lot for a long time is operated, the normal water temperature detection value T _W is low, and it is predicted that the inside temperature and the outside temperature of the vehicle are equal. Therefore, the detected value θ _IN of the inside air temperature sensor 1b is used as the outside air temperature estimated value θ _S , and the air conditioning control during the operation of the vehicle is performed. On the other hand, when the vehicle is stopped and restarted for a short period of time for shopping or the like for a short time, the detected water temperature T _W is high, and it is predicted that the air-conditioned inside temperature and the outside temperature are not equal. Because
Subsequent air-conditioning control is performed according to the estimated outside air temperature obtained by the calculation. For this reason, air-conditioning control of the same quality as before can be realized without using an outside air temperature sensor. Further, the present embodiment is based on the existing auto air conditioner ECU (Electr
Sonic Control Unit) can be implemented only by changing the program, and therefore, by not providing an outside air temperature sensor, it is possible to reduce the apparatus cost as a whole.

Next, another embodiment of the present invention will be described with reference to FIGS. The same components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof will not be repeated.

In FIG. 4, an input unit 41 includes an ignition switch 1a, an internal temperature sensor 1b, and a water temperature sensor 1c.
Sensor 41d for detecting the amount of solar radiation into the vehicle interior
It has. Detected value S _T of the solar radiation sensor 41d is configured to be input to the ambient temperature estimation unit 42.

The outside air temperature estimating section 42 has the same configuration as that of the above-described embodiment except that its function is different. here,
Details of the processing performed by the outside air temperature estimating unit 42 will be described later.

The memory 43 stores an estimated outside air temperature θ _S and a detected value θ _IN0 of the internal air temperature sensor 1b when the vehicle is stopped, a detected value _{ST 0} of the solar radiation sensor 41d when the vehicle is stopped, and a solar radiation conversion table. 43a is stored. here,
The contents of the solar radiation conversion table 43a will be clarified together in the following operation description.

The other structure is the same as that of the above-described embodiment.

Next, the overall operation of this embodiment will be described with reference to FIGS. In the following description, the detection value of the inside air temperature sensor 1b is the inside air temperature detection value, the detection value of the water temperature sensor 1c is the water temperature detection value, and the detection value of the sunshine sensor 41d is the sunshine detection value. The time up to is referred to as the parking time.

The variables and units used in the following description are as follows. θ _S [° C]: Estimated outside air temperature θ _IN0 [° C]: Detected internal air temperature when the vehicle is stopped θ _IN [° C]: Detected internal air temperature when the vehicle is started θ _SUN [° C]: The amount due to solar radiation during parking Temperature rise conversion θ _OUT [° C]: Temporary outside air temperature θ _UP [° C]: Temperature rise conversion of solar radiation by the solar radiation conversion table T _W [° C]: Water temperature detection value at vehicle start S _T0 [klx]: Vehicle stop solar radiation detected value S _T [klx]: solar radiation detected value S _TOFF during vehicle start [klx]: solar radiation parked [klx] W [kcal / h ° C.]: cabin heat loss coefficient Q [kcal / ° C.] : Heat capacity in the cabin k ₂ [° C / klxh]: Actual measurement value t [h]: Parking time α, k ₃ : Coefficient

When the ignition switch 1a is operated and the vehicle is set to the start state, the outside air temperature estimating section 42 stops the timer 2a which has measured the time t from the previous stop of the vehicle to the start of the current vehicle ( Step S5
1). Then, the external temperature estimation value θ _S , the internal temperature detection value θ _IN0 when the vehicle was stopped last time, and the solar radiation detection value S _T0 when the vehicle was stopped last time are read out from the memory 43 (step S52). , the inside air temperature detection value θ _iN when the vehicle is started, the water temperature detection value T _W, the input of solar radiation detected value S _T accepted (step S53). And the outside air temperature estimation unit 4
2 calculates the in-parking solar radiation amount _STOFF based on the following equation (5) (step S54).

S _TOFF = αS _T0 + (1−α) S _T Equation (5)

Here, 0 <α ≦ 1, for example, α =
0.5.

[Prediction function of outside temperature estimation unit]

Subsequently, the outside air temperature estimating section 42 determines whether or not the detected water temperature value T _W is equal to or higher than 50 ° C. (step S55). As a result, if the 50 [℃] or higher, it is determined that there is from the last vehicle stop state elapsed time is short cabin is still conditioned to date, the inside air temperature detection value theta _IN during vehicle start out Predict not to be equal to temperature. on the other hand,
If the detected water temperature value T _W is less than 50 ° C., it is determined that a sufficient time has elapsed since the last stop of the vehicle and the present time, and the detected inside air temperature value θ _IN at the time of starting the vehicle is equal to the outside air temperature. Predict.

Here, whether or not the detected inside air temperature value θ _IN at the time of starting the vehicle is equal to the outside air temperature is determined by determining whether or not the parking time t measured by the timer 2a is, for example, one hour or more. May be done.

[Estimation Value Calculation Function of Outside Air Temperature Estimation Unit]

If the detected water temperature value T _W is 50 ° C. or more, that is, if it is predicted that the detected inside air temperature value θ _IN at the time of starting the vehicle is not equal to the outside air temperature, the following equation (6) is used. calculating the inside air temperature rise in terms theta _SUN of by sunlight (step S56).

Θ _SUN = k ₂ S _TOFF t Equation (6)

Here, k ₂ is an actually measured value, and it is necessary to set an optimum value experimentally obtained in advance.

Subsequently, the outside air temperature estimating section 42 calculates the following equation (7).
To calculate the provisional outside air temperature θ _OUT (step S5)
7).

[0061]

(Equation 4)

The above equation (7) is obtained by adding θ to the above equation (3).
= Θ _IN −θ _OUT −θ _SUN , θ ₀ = θ _IN0 −θ _S is substituted and derived.

Next, the outside air temperature estimating section 42 calculates an outside air temperature estimated value θ _S by the following equation (8) (step S58).

Θ _S = k ₃ θ _OUT + (1−k ₃ ) θ _S Equation (8)

Here, 0 <k ₃ ≦ 1, for example, k ₃
= 0.5 may be set. Θ _{S on} the right side is the estimated value of the outside air temperature during the previous operation of the vehicle stored in the memory 43. In the state where the apparatus is operated for the first time, the optimum outside air temperature estimation value is not stored in the memory 43, but in such a case, it is predicted that the inside air temperature detection value θ _IN at the time of normal vehicle start and the outside air temperature are equal. Therefore, the processing after step S59 is performed.

After calculating the estimated outside temperature θ _S , the outside temperature estimation unit 42 updates the estimated value θ _S in the memory 43 (step S61), and outputs the estimated outside temperature θ _S to the air conditioning control unit 4. (Step S62).

On the other hand, in step S55, if the detected water temperature value T _W is less than 50 ° C., that is, if it is predicted that the detected inside air temperature value θ _IN at the time of starting the vehicle is equal to the outside air temperature, the outside air temperature estimating section 42 refers to the solar radiation conversion table 43a shown in FIG. 6, the temperature rise in terms of the solar radiation from the solar radiation S _TOFF parked θ
_{The UP} is acquired (Step S59). The solar radiation conversion table 43a associates the solar radiation amount S _TOFF during parking with the temperature rise in the vehicle interior due to the solar radiation, and it is necessary to set an optimum value in advance by actual measurement.

Subsequently, the outside air temperature estimating unit 2 calculates the outside air temperature estimated value θ _S by the following equation (9), and thereafter, proceeds to step S61.
Execute the process from.

Θ _S = θ _IN −θ _UP Equation (9)

The air-conditioning control unit 4 executes various air-conditioning control processes during the operation of the vehicle by using the outside air temperature estimation value θ _S input from the outside air temperature estimation unit 2 instead of the detection value of the conventional outside air temperature sensor. I do.

[Process of External Temperature Estimation Unit when Vehicle Stops]

When the ignition switch 1a is operated,
When the vehicle is stopped, the outside air temperature estimation unit 2, a memory 4 the inside air temperature detection value theta _{IN 0} and solar radiation detected value S _T0 when the vehicle is stopped
3 (step S71). Then, in order to measure the parking time t from the time when the vehicle stops to the time when the next vehicle starts, the timer 2a starts counting time.

According to the above-described embodiment, for example, in a situation where the inside temperature is considerably higher than the outside temperature despite the fact that the water temperature detection value is not so high because the vehicle has been parked under the scorching sun for a long time. In, the value obtained by subtracting the temperature rise due to solar radiation from the detected inside air temperature is used as the estimated outside air temperature. On the other hand, when the vehicle is parked under the sunshine for a short time and then restarted immediately, the air temperature control is performed based on the estimated outside air temperature calculated taking into account the solar radiation during parking because the detected water temperature is high. Will be done. For this reason, in addition to having the same operation and effect as the above-described first embodiment, it is possible to set an appropriate outside air temperature estimation value even under a situation in which the solar radiation greatly affects the vehicle interior temperature, and it is possible to set a stable value. Air conditioning control can be performed.

Here, in each of the above embodiments, for example, when the vehicle is left in an indoor parking lot, the outside air temperature of the parking lot may be different from the outdoor outside temperature.
It is also conceivable that an appropriate outside air temperature estimate cannot be obtained when the vehicle is started. In this case, for example, a detected inside air temperature when a predetermined time has elapsed since the vehicle was started may be used as an estimated outside air temperature. Further, the detected value of the inside air temperature when the detected value of the solar radiation sensor exceeds a certain value after the vehicle is started may be used as the estimated outside air temperature value.

[0075]

Since the present invention is constructed and functions as described above, according to this, the outside air temperature estimating section predicts whether or not the detected value of the inside air temperature sensor at the time of starting the vehicle is equal to the outside air temperature. If it is predicted that they are equal, the detected value of the inside air temperature sensor or a value obtained by performing a predetermined correction on the detected value is set as the estimated outside air temperature. Since the estimated value is calculated and air conditioning control is performed using the estimated outside air temperature, air conditioning control of the same quality as the conventional air conditioning control can be realized without using the outside air temperature sensor. Can be eliminated and stable air conditioning control can be performed. Further, the present embodiment is based on an existing auto air conditioner ECU (Electronic C).
Since it can be implemented only by changing the program of the control unit (control unit), the cost of the apparatus can be reduced as a whole by not providing the outside air temperature sensor. According to the second aspect of the invention, in addition to the above-described functions and effects, the outside air temperature estimating unit calculates the outside air temperature estimated value in consideration of the sunshine into the vehicle interior. It is possible to provide an unprecedented excellent air conditioning control device for a vehicle that can set an appropriate outside air temperature estimation value even under a large situation and can perform stable air conditioning control.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the outside air temperature estimating unit of FIG. 1 at the time of starting the vehicle.

FIG. 3 is a flowchart showing an operation of the outside air temperature estimating unit of FIG. 1 when the vehicle stops.

FIG. 4 is a block diagram showing another embodiment of the present invention.

FIG. 5 is a flowchart showing an operation of the outside air temperature estimating unit of FIG. 4 at the time of starting the vehicle.

FIG. 6 is a table showing the contents of a solar radiation conversion table in FIG. 4;

FIG. 7 is a flowchart showing an operation of the outside air temperature estimating unit of FIG. 4 when the vehicle stops.

[Explanation of symbols]

1b Internal air temperature sensor 2, 42 External air temperature estimating unit 2a Timer 3, 43 Memory 4 Air conditioning control unit θ _IN Internal air temperature detected value when vehicle starts θ _IN0 Internal air temperature detected value when vehicle is stopped θ _S External air temperature estimated value

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60H 1/00 101

Claims (2)

(57) [Claims] 1. An air conditioning control system for a vehicle, comprising: an inside air temperature sensor for detecting a temperature in a vehicle interior; and an air conditioning control unit for performing air conditioning control based on at least a detected value of the inside air temperature sensor and information on a predetermined outside air temperature. The apparatus includes a memory that stores at least a preset outside air temperature estimation value before the vehicle stops and a detection value of the inside air temperature sensor when the vehicle stops, and a timer that measures the time from when the vehicle stops to when the vehicle starts. A prediction function of predicting whether or not a detected value of the internal temperature sensor at the time of starting the vehicle is equal to an actual external temperature at the time of starting the vehicle; and When it is predicted that the detection value of the inside air temperature sensor at the time of starting the vehicle is equal to the actual outside air temperature at the time of starting the vehicle, the detection value of the inside air temperature sensor at the time of starting the vehicle or A first estimated value calculating function of setting a value obtained by performing a predetermined correction to the output value as an estimated outside air temperature after the vehicle starts and outputting the estimated outside air temperature as information of the outside air temperature; If the detection value at the time of starting the vehicle is predicted to be not equal to the actual outside temperature at the time of starting the vehicle, at least the detection value of the inside temperature sensor at the time of starting the vehicle, the detection value of the inside temperature sensor at the time of stopping the vehicle, Based on the estimated outside air temperature before the vehicle is stopped and the measured time from when the vehicle is stopped to when the vehicle is started, an estimated outside air temperature after the vehicle is started is calculated, and the estimated outside air temperature is output as the information about the outside air temperature. And a second estimated value calculating function. 2. An interior temperature sensor for detecting a temperature in a vehicle interior, a solar radiation sensor for detecting an amount of solar radiation into the interior of the vehicle, and at least a detection value of the internal temperature sensor, a detection value of the solar radiation sensor, and a predetermined outside temperature. A vehicle air-conditioning control device having an air-conditioning control unit for performing air-conditioning control based on information, comprising: a preset outside air temperature estimation value before the vehicle stops, a detection value of the inside air temperature sensor when the vehicle stops, and the solar radiation A memory storing a detection value of the sensor when the vehicle stops, and an outside air temperature estimation unit equipped with a timer for measuring a time from when the vehicle stops to when the vehicle starts, wherein the outside air temperature estimation unit includes the inside air temperature sensor A prediction function for predicting whether or not the detected value at the time of starting the vehicle is equal to the actual outside temperature at the time of starting the vehicle; and If it is predicted that the outside air temperature is equal to the actual outside air temperature, the detected value of the inside air temperature sensor at the time of starting the vehicle or a value obtained by performing a predetermined correction on the detected value is set as the estimated outside air temperature after the vehicle starts, and A first estimated value calculating function of outputting an estimated temperature value as information of the outside temperature; and a case where a detection value of the inside temperature sensor at the time of starting the vehicle is predicted not to be equal to an actual outside temperature at the time of starting the vehicle. A detection value of the inside air temperature sensor when the vehicle starts, a detection value of the inside air temperature sensor when the vehicle stops, a detection value of the solar irradiation sensor when the vehicle starts, a detection value of the solar irradiation sensor when the vehicle stops, the vehicle stop Based on the previous outside air temperature estimation value and the measurement time from when the vehicle stopped to when the vehicle started, an outside air temperature estimation value after starting the vehicle was calculated, and the outside air temperature estimation value was used as the information on the outside air temperature. That the vehicle air conditioning control apparatus, wherein the includes a second estimate calculation function of force, the.