Vehicle air conditioning control device

Abstract

To finely determine the generation of, for example, the cloudiness of a window, and to automatically switch a blowout port for blowing out air-conditioned air accurately at timing which is expected by an occupant when automatically switching the blowout port.SOLUTION: A weighing correction value for window cloudiness for coping with the existence of the window cloudiness is derived by a derivation part 7 by using a membership function of a fuzzy interference which is set at a membership function setting part 8 in advance, when the derived weighing correction value is equal to or larger than a preset value, a blowout switching part 10 is controlled by a control part 9, and a blowout state of air-conditioned air from a foot blowout port and a defroster is switchingly brought about. By this simple and inexpensive constitution, the blowout port for blowing out the air-conditioned air can be automatically switched accurately at timing expected by an occupant of a vehicle.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an air conditioning control device for a vehicle that switches and controls the airflow from a foot outlet to a foot outlet and a defroster outlet to prevent windows from fogging up during heating or other operations. [Background technology]

[0002] Conventionally, some vehicle air conditioning control devices are equipped with an automatic air conditioning function that automatically adjusts the air conditioning temperature of the air conditioning device (hereinafter also referred to as air conditioner) to the temperature desired by the occupant, and calculates the temperature of the air conditioning air based on detection signals from various sensors and controls it to be blown out from the optimal outlet (see, for example, Patent Document 1).

[0003] In order to prevent window fogging, some automatic air conditioner functions automatically switch the air outlets to blow conditioned air from the footwell and defroster outlets when certain conditions are met. Specifically, the system determines whether window fogging is occurring based on whether or not all or some of the detected values ​​from the outside air temperature sensor, the engine water temperature sensor, the solar radiation sensor, the vehicle speed sensor, and the air conditioner outlet temperature sensor are equal to or greater than predetermined values, and then determines whether or not to switch the air outlets to prevent window fogging, and then performs the switching control. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 6-206435 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if the determination of whether or not to perform air outlet switching control is made based on whether the detection values ​​of the outside air temperature sensor, engine water temperature sensor, solar radiation sensor, vehicle speed sensor, air conditioner outlet temperature sensor, etc. are above a predetermined value, it is not possible to make a precise determination of the occurrence of window fogging, which creates the problem that the air outlet cannot be automatically switched to prevent window fogging at the timing expected by the occupants.

[0006] To provide a vehicle air conditioner that can accurately switch an air outlet that blows out conditioned air at a timing expected by an occupant by making it possible to determine, for example, the occurrence of fogging on a window in detail and, when automatically switching an air outlet, to do so. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides a vehicle air conditioning control device that switches from blowing conditioned air from foot outlets to blowing conditioned air from foot outlets and a defroster outlet to prevent windows from fogging up, and includes wiper speed, outside air temperature, vehicle speed, amount of solar radiation, and vehicle interior temperature detection units that detect wiper speed, outside air temperature, vehicle speed, amount of solar radiation, and vehicle interior temperature, respectively, and uses preset fuzzy inference membership functions for the values ​​detected by each of the detection units to determine whether the wiper speed is fast or slow, and the outside air temperature, using a bad weather rate based on the detected wiper speed value as a factor. The system is characterized by comprising a derivation unit that classifies the output values ​​into high / low outside air temperature as an element, high / low vehicle speed as an element, high / low solar radiation as an element of detected vehicle speed, high / low solar radiation as an element of detected solar radiation, and high / low vehicle interior temperature as an element of detected vehicle interior temperature, and derives a weighting correction value from a combination of at least two of these classification results; and a control unit that determines whether the weighting correction value derived by the derivation unit is equal to or greater than a preset value, and determines whether to blow conditioned air from the foot outlet or from both the foot outlet and the defroster outlet, and controls the switching.

[0008] According to this configuration, the derivation unit uses preset fuzzy inference membership functions for each of the detected values ​​by the detection units that detect the wiper speed, outside air temperature, vehicle speed, amount of solar radiation, and cabin temperature to classify the wiper speed as fast or slow using the bad weather rate based on the detected wiper speed value as a factor, the outside air temperature as high or low using the detected outside air temperature value as a factor, the vehicle speed as high or low using the detected vehicle speed value as a factor, the solar radiation as high or low using the detected solar radiation value as a factor, and the cabin temperature as high or low using the detected cabin temperature value as a factor, and derives a weighting correction value from a combination of at least two of these classification results, and the control unit determines whether the derived weighting correction value is equal to or greater than a preset value, and depending on the determination result, the control unit determines whether to blow conditioned air from the foot outlet or from both the foot outlet and the defroster outlet, and controls the switching.

[0009] As a result, a weighting correction value is derived using a membership function of fuzzy inference, and if the derived weighting correction value is equal to or greater than a preset value, control is performed, such as switching to a state in which conditioned air is blown out from the foot outlets and the defroster outlets. This eliminates the need for a new sensor to determine whether or not the outlets need to be switched, thereby preventing the configuration from becoming complicated. Furthermore, compared to the case in which a new sensor is provided, the introduction cost of software for deriving a weighting correction value using a membership function of fuzzy inference is lower than the introduction cost of hardware for a new sensor. This simple and inexpensive configuration enables automatic switching of the outlets from which conditioned air is blown out with precision at the timing expected by the vehicle occupants.

[0010] In addition, the weighting correction value derived by the derivation unit is for window fogging to determine whether or not the window is fogging, and the higher the degree of fogging of the window, the higher the weighting correction value.The control unit may determine that the window is fogging if the weighting correction value for window fogging is equal to or greater than a predetermined value set in advance, and control the state of air conditioning air being blown out from the foot outlet and the defroster outlet.

[0011] With this configuration, the control unit determines that the windows are fogging if the weighting correction value for window fogging is equal to or greater than a predetermined value, and controls the state of the air conditioning air blowing out from the foot outlets and defroster outlets.This makes it possible to precisely determine the occurrence of window fogging, and automatically switch the outlets blowing out the air conditioning air with precision at the timing expected by the occupants.

[0012] The vehicle may further include an engine water temperature detection unit and an air volume detection unit that detect the engine water temperature and the volume of the conditioned air, respectively. The derivation unit uses preset fuzzy inference membership functions for the detection values ​​of the engine water temperature detection unit and the air volume detection unit to classify the detected engine water temperature as a factor into high / low engine water temperature and the detected air volume as a factor into strong / weak air volume, and derives a weighting correction value for hot flushing from a combination of these classification results to determine whether the occupant is hot flushed, the correction value becoming higher the lower the degree of hot flushing. If the sum of the weighting correction value for window fogging and the weighting correction value for hot flushing derived by the derivation unit is equal to or greater than a preset value, the control unit may determine that the window is fogging and that hot flushing is not present, and control the state of the conditioned air being blown out from the foot outlets and the defroster outlets.

[0013] With this configuration, if the sum of the weighting correction value for window fogging and the weighting correction value for facial flushing derived from the derivation unit is equal to or greater than a preset value, the control unit determines that there is window fogging but no facial flushing, and controls the state of air conditioning air being blown out from the foot outlets and defroster outlets.This makes it possible to precisely determine the state of window fogging and the state of facial flushing of the occupant, and automatically switch the outlets that blow out the air conditioning air with precision at the timing expected by the occupant. [Effects of the Invention]

[0014] According to the present invention, if the weighting correction value derived using the membership function of fuzzy inference is equal to or greater than a preset value, control is performed such as switching to a state in which conditioned air is blown out from the foot outlets and defroster outlets.Therefore, without providing a new sensor to determine whether or not the outlet needs to be switched, a simple and inexpensive configuration makes it possible to automatically switch the outlets that blow out conditioned air with precision at the timing expected by the vehicle occupants, making this suitable for in-vehicle automatic air conditioners. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a block diagram of a first embodiment of a vehicle air conditioning control device of the present invention. [Figure 2] FIG. 2 is an explanatory diagram of the operation of FIG. 1, showing an example of a membership function of the wiper speed. [Figure 3] FIG. 2 is an explanatory diagram of the operation of FIG. 1, showing an example of a membership function of the outside air temperature. [Figure 4] FIG. 2 is an explanatory diagram of the operation of FIG. 1, showing an example of a weighting correction value for window fogging. [Figure 5] 2 is a flowchart illustrating the operation of FIG. 1. [Figure 6] FIG. 10 is a block diagram of a second embodiment of the present invention. [Figure 7] 7 is a flowchart illustrating the operation of FIG. 6. DETAILED DESCRIPTION OF THE INVENTION

[0016] (First embodiment) A first embodiment of the vehicle air conditioning control device of the present invention will be described in detail with reference to FIGS.

[0017] FIG. 1 shows a vehicle air conditioning control device 1 that controls an in-vehicle automatic air conditioner, and is equipped with a wiper speed sensor 2, an outside air temperature sensor 3, a vehicle speed sensor 4, a solar radiation amount sensor 5, and an inside vehicle temperature sensor 6, which are wiper speed, outside air temperature, vehicle speed, solar radiation amount, and inside vehicle temperature detection units that detect wiper speed, outside air temperature, vehicle speed, solar radiation amount, and inside vehicle temperature, respectively.

[0018] Then, each detection value from each sensor 2 to 6 is taken into the derivation unit 7, and the derivation unit 7 uses membership functions preset in the membership function setting unit 8 for each detection value of each sensor 2 to 6 to classify the wiper speed into fast / slow using the bad weather rate based on the detected wiper speed value as a factor, the outside air temperature into high / low using the detected outside air temperature as a factor, the vehicle speed into high / low using the detected vehicle speed as a factor, the solar radiation into high / low using the detected solar radiation as a factor, and the interior vehicle temperature into high / low using the detected interior vehicle temperature as a factor, and derives a weighting correction value for window fogging from the combination of these classification results.

[0019] Here, the membership function setting unit 8 is configured by, for example, a memory, and stores a preset membership function of wiper speed as shown in Fig. 2 for classifying wiper speed into fast and slow using as an element the rate of bad weather based on the value detected by the wiper speed sensor 2, and a preset membership function of outside air temperature as shown in Fig. 3 for classifying outside air temperature into high and low using as an element the value detected by the outside air temperature sensor 3. The membership function setting unit 8 also stores a preset membership function of vehicle speed for classifying vehicle speed into high and low using as an element the value detected by the vehicle speed sensor 4, a preset membership function of solar radiation for classifying solar radiation into high and low using as an element the value detected by the solar radiation sensor 5, and a preset membership function of vehicle interior temperature for classifying vehicle interior temperature into high and low using as an element the value detected by the vehicle interior temperature sensor 6.

[0020] Now, the operation of deriving the weighting correction value by the deriving unit 7 will be explained. Based on the detected values ​​by the five sensors 2 to 6 shown in Fig. 1, the wiper speed is classified into fast and slow, and the outside air temperature, vehicle speed, amount of solar radiation, and interior temperature are each classified into high and low using membership functions preset in the membership function setting unit 8 as shown in Figs. 2 and 3. Since each of these is classified into two states, the combination of these classification results is divided into two states as shown in Fig. 4. 5A total of 32 categories are possible. In this case, a "fast" wiper speed indicates that the weather is bad and the windows are likely to fogging up; a "low" outside air temperature indicates that the outside of the vehicle is cold and the windows are likely to fogging up; a "high" vehicle speed indicates that the vehicle is traveling in a luminous flux and is cold and the windows are likely to fogging up; a "low" amount of solar radiation indicates that there is little sunlight and the windows are likely to fogging up; and a "high" interior temperature indicates that the inside of the vehicle is colder than the outside and the windows are likely to fogging up. The sum of the number of categories indicating that the windows are likely to fogging up is then derived as the weighted correction value by the derivation unit 7. Note that, to make it easy to determine whether or not the windows are likely to fogging up, as shown in FIG. 4, categories indicating that the windows are likely to fogging up, i.e., "window fogging present," are not shaded, and categories indicating that the windows are not likely to fogging up, i.e., "window not fogging up," are shaded.

[0021] For example, the first combination in FIG. 4, in which the wiper speed is "fast," the outside air temperature is "low," the vehicle speed is "high," the amount of solar radiation is "low," and the interior temperature is "high," indicates "window fogging" where none of the five categories of wiper speed, outside air temperature, vehicle speed, amount of solar radiation, and interior temperature are shaded. Therefore, as shown in FIG. 4, the derivation unit 7 derives "5," which is the sum of the five categories of wiper speed, outside air temperature, vehicle speed, amount of solar radiation, and interior temperature that indicate "window fogging," as the weighted correction value for window fogging to correspond to the presence of window fogging.

[0022] In addition, in the second combination in FIG. 4 where the wiper speed is "fast," the outside air temperature is "low," the vehicle speed is "high," the amount of solar radiation is "low," and the vehicle interior temperature is "low," the four categories of wiper speed, outside air temperature, vehicle speed, and amount of solar radiation represent "window fogging" with no shading, while the category of "low" for the vehicle interior temperature in FIG. 4 represents "window not fogging" with shading. Therefore, the derivation unit 7 derives "4," which is the sum of the four categories of wiper speed, outside air temperature, vehicle speed, and amount of solar radiation that represent "window fogging," as shown in FIG. 4, as the weighted correction value for window fogging to correspond to the presence of window fogging.

[0023] Furthermore, in the 31st combination in Figure 4, where the wiper speed is "slow," the outside air temperature is "high," the vehicle speed is "low," the amount of solar radiation is "high," and the interior temperature is "high," the shaded areas of the wiper speed, the outside air temperature, the vehicle speed, and the amount of solar radiation are "slow," representing "no window fogging," while only the unshaded area of ​​the interior temperature "high" in Figure 4 represents "window fogging." Therefore, as shown in Figure 4, the derivation unit 7 derives "1" based on only one area of ​​the interior temperature as the weighting correction value for window fogging to correspond to the presence of window fogging.

[0024] In addition, in the 32nd combination in FIG. 4, where the wiper speed is "slow," the outside air temperature is "high," the vehicle speed is "low," the amount of solar radiation is "high," and the temperature inside the vehicle cabin is "low," all five categories of wiper speed, outside air temperature, vehicle speed, amount of solar radiation, and temperature inside the vehicle cabin are shaded, indicating "no window fogging," and therefore the weighting correction value for window fogging derived by the derivation unit 7 to correspond to the presence of window fogging is "0," as shown in FIG. 4.

[0025] In this way, by creating a two-dimensional map as shown in FIG. 4 and storing the combinations of the categories of wiper speed, outside air temperature, vehicle speed, amount of solar radiation, and cabin temperature in a memory or the like, it is possible to easily derive a weighting correction value for the occurrence of window fogging, which corresponds to the number of categories of "window fogging" from the two-dimensional map.

[0026] Then, the control unit 9 determines whether the weighting correction value derived by the derivation unit 7 is equal to or greater than a predetermined value set in advance. If the determination result is equal to or greater than the predetermined value, and the current air conditioning air is being blown from the foot outlet, the control unit 9 controls the outlet switching unit 10 to switch the air conditioning air to being blown from the foot outlet and the defroster outlet.

[0027] Next, a control procedure for switching the air outlet for conditioned air depending on whether the window is fogging up will be described with reference to FIG.

[0028] As shown in FIG. 5, when the detection values ​​from the sensors 2 to 6 are taken in by the derivation unit 7 (step S1), the wiper speed is classified as fast or slow using the wiper speed membership function preset in the membership function setting unit 8 for the detection value of the wiper speed sensor 2 (step S2), and the outside air temperature is classified as high or low using the outside air temperature membership function preset in the membership function setting unit 8 for the detection value of the outside air temperature sensor 3 (step S3). Similarly, the vehicle speed is classified as high or low, the amount of solar radiation is classified as high or low, and the temperature inside the vehicle cabin is classified as high or low (steps S4 to S6).

[0029] 4, the derivation unit 7 derives a weighting correction value for window fogging to deal with the presence of window fogging (step S7), and determines whether the derived weighting correction value C is equal to or greater than a predetermined value C1 (C≧C1) (step S8). If the determination result is YES, it is determined that window fogging is present, and the control unit 9 controls the outlet switching unit 10 to switch the conditioned airflow to be blown from the foot outlet and the defroster outlet (step S9), and the operation then ends. On the other hand, if the determination result in step S8 is NO, it is determined that window fogging is not present, and the control unit 9 controls the outlet switching unit 10 to switch the conditioned airflow to be blown from the foot outlet (step S10), and the operation then ends.

[0030] Therefore, according to the first embodiment described above, the derivation unit 7 derives a weighting correction value C for window fogging to correspond to the presence of window fogging using a fuzzy inference membership function preset in the membership function setting unit 8. If the derived weighting correction value C is equal to or greater than a preset value C1 (C≧C1), the control unit 9 controls the outlet switching unit 10 to switch the state of conditioned air from the foot outlets and the defroster outlets. This allows for a more precise determination of the presence of window fogging than conventional methods that determine the presence of window fogging based on whether the wiper speed is faster or slower than a predetermined speed or whether the outside air temperature is higher or lower than a predetermined temperature, and allows for accurate automatic switching of the outlets from which conditioned air is blown at the timing expected by the occupant. Furthermore, since there is no need to provide a new sensor such as a humidity sensor to detect the presence of window fogging, the configuration can be kept simple and inexpensive.

[0031] Furthermore, compared to installing a new humidity sensor, etc., the cost of installing software to derive weighting correction values ​​using fuzzy inference membership functions is cheaper than the cost of installing hardware such as a new humidity sensor, so with a simple and inexpensive configuration, it is possible to automatically switch the air outlet that blows out conditioned air with precision at the timing expected by the vehicle occupants.

[0032] (Second embodiment) Next, a second embodiment of the vehicle air conditioning control device of the present invention will be described in detail with reference to Figures 6 and 7. In Figure 6, the same reference numerals as those in Figure 1 of the first embodiment indicate the same or corresponding parts, and the following description will mainly focus on the differences from the first embodiment.

[0033] The vehicle air conditioning control device 1A shown in Fig. 6 further includes an engine water temperature sensor 11 and an air flow sensor 12, which are an engine water temperature detection unit and an air flow detection unit that detect the engine water temperature and the air flow rate of the air conditioning air, in addition to the configuration shown in Fig. 1. In addition to preset membership functions for the detection values ​​of the sensors 2 to 6, a membership function setting unit 8 stores a preset engine water temperature membership function for classifying the engine water temperature as high or low using the detection value of the engine water temperature sensor 11 as an element, and a preset air flow membership function for classifying the air flow rate as strong or weak using the detection value of the air flow sensor 12 as an element, in order to determine whether the occupant is flushed.

[0034] 4, which represent the likelihood of window fogging, the derivation unit 7 derives a weighting correction value corresponding to the presence of window fogging. Furthermore, the derivation unit 7 also derives a weighting correction value corresponding to the absence of hot flushing using the membership functions for engine water temperature and airflow through a similar derivation process. The control unit 9 determines whether the sum C of the weighting correction value Ca corresponding to the presence of window fogging and the weighting correction value Cb corresponding to the absence of hot flushing is equal to or greater than a preset value C2. If the sum (Ca + Cb) is equal to or greater than the preset value C2, the control unit 9 determines that the window is fogging and the absence of hot flushing is present, and controls the outlet switching unit 10 to switch the state of the air conditioning from the foot outlets and the defroster outlets. Here, the weighting correction value Cb corresponding to hot flushing is larger the lower the degree of hot flushing is, and is smaller the higher the degree of hot flushing is.

[0035] Next, a control procedure for switching the air outlet for conditioned air depending on whether or not the window is fogging up and whether or not the face is flushed in the second embodiment shown in FIG. 6 will be described with reference to FIG.

[0036] As shown in FIG. 7, when the detection values ​​from the sensors 2 to 6 are taken in by the derivation unit 7 (step S21), the wiper speed is classified as fast or slow using the wiper speed membership function preset in the membership function setting unit 8 for the detection value of the wiper speed sensor 2 (step S22), and the outside air temperature is classified as high or low using the outside air temperature membership function preset in the membership function setting unit 8 for the detection value of the outside air temperature sensor 3 (step S23). Similarly, the vehicle speed is classified as high or low, the amount of solar radiation is classified as high or low, and the interior temperature is classified as high or low (steps S24 to S26). Thereafter, based on the combination of the classification results of the wiper speed, outside air temperature, vehicle speed, solar radiation, and interior temperature shown in the two-dimensional map of FIG. 4, the derivation unit 8 derives a weighting correction value Ca for window fogging to deal with the presence of window fogging (step S27).

[0037] Furthermore, the engine water temperature is classified as high or low using a membership function of engine water temperature preset in the membership function setting unit 8 for the detected value of the engine water temperature sensor 11 (step S28), and the air volume of the air conditioning air is classified as strong or weak using a membership function of air volume preset in the membership function setting unit 8 for the detected value of the air volume sensor 3 (step S29).Based on the combination of the classification results of engine water temperature and air volume similar to the two-dimensional map of Figure 4, the derivation unit 7 derives a weighting correction value Cb for facial flushing to deal with no facial flushing (step S30).

[0038] Then, it is determined whether the sum of the weighting correction value Ca for window fogging derived by the derivation unit 7 in step S27 and the weighting correction value Cb for hot flushing derived in step S30 is equal to or greater than a preset value C2 (Ca + Cb ≥ C2) (step S31). If the determination result is YES, it is determined that there is window fogging and the occupant is not hot flushing, and the control unit 9 controls the outlet switching unit 10 to switch the conditioned air to be blown from the foot outlets and the defroster outlets (step S32), after which the operation ends. On the other hand, if the determination result in step S31 is NO, it is determined that there is no window fogging and the occupant is hot flushing, and the control unit 9 controls the outlet switching unit 10 to switch the conditioned air to be blown from the foot outlets (step S33), after which the operation ends.

[0039] Therefore, according to the second embodiment, if the sum of the weighting correction value Ca for window fogging and the weighting correction value Cb for facial flushing derived by the derivation unit 7 is equal to or greater than the preset value C2, the control unit 9 determines that the windows are fogging but the occupants are not flushed, and controls the state of air conditioning air being blown out from the foot outlets and the defroster outlets. This makes it possible to precisely determine the state of window fogging and the state of facial flushing of the occupants, and automatically switch the outlets blowing out the air conditioning air with precision at the timing expected by the occupants.

[0040] The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention.

[0041] For example, in the first embodiment described above, the weighting correction value C for window fogging to deal with the presence of window fogging is derived using a fuzzy inference membership function that is preset for each of the detection values ​​from the sensors 2 to 6 that detect the wiper speed, outside air temperature, vehicle speed, amount of solar radiation, and temperature inside the vehicle cabin, respectively. However, the weighting correction value for window fogging may also be derived using at least two of the fuzzy inference membership functions that are preset for each of the detection values ​​from the sensors 2 to 6.

[0042] Furthermore, although examples of the membership functions of fuzzy inference in the above-described embodiment are shown in FIGS. 2 and 3, the membership functions are not limited to those shown in FIGS.

[0043] The present invention can be applied to a vehicle air conditioning control device that switches and controls the air conditioning from blowing from the foot outlet to blowing from the foot outlet and the defroster outlet to prevent windows from fogging up. [Explanation of symbols]

[0044] 1, 1A...Vehicle air conditioning control device 2...Wiper speed sensor (wiper speed detection part) 3...Outside air temperature sensor (outside air temperature detection part) 4... Vehicle speed sensor (vehicle speed detection section) 5...Solar radiation sensor (solar radiation detection unit) 6... Vehicle interior temperature sensor (vehicle interior temperature detection section) 7...Derivation part 9...Control section 11... Engine water temperature sensor (engine water temperature detection section) 12...Air volume sensor (air volume detection part)

Claims

1. In a vehicle air conditioning control device that controls switching from a state in which conditioned air is blown from a foot outlet to a state in which conditioned air is blown from a foot outlet and a defroster outlet in order to prevent windows from fogging up, a wiper speed, outside air temperature, vehicle speed, solar radiation, and vehicle interior temperature detection unit that detects a wiper speed, an outside air temperature, a vehicle speed, a solar radiation amount, and a vehicle interior temperature, respectively; a derivation unit that uses a preset fuzzy inference membership function for each of the detection values ​​by the detection units to classify the wiper speed into fast / slow using a bad weather rate based on the detected wiper speed as an element, high / low outside air temperature using the detected outside air temperature as an element, high / low vehicle speed using the detected vehicle speed as an element, high / low solar radiation using the detected solar radiation as an element, and high / low inside vehicle temperature using the detected inside vehicle temperature as an element, and derives a weighted correction value from a combination of at least two of these classification results; a control unit that determines whether the weighting correction value derived by the derivation unit is equal to or greater than a preset value, and determines whether to blow conditioned air from the foot outlet or to blow conditioned air from both the foot outlet and the defroster outlet, and controls the switching; An air conditioning control device for a vehicle, comprising:

2. the weighting correction value derived by the derivation unit is for determining whether or not a window is fogging, and the higher the degree of fogging of the window, the higher the weighting correction value; The control unit determines that the window is fogged if the weighting correction value for window fogging is equal to or greater than a predetermined value set in advance, and controls the blowing state of the conditioned air from the foot outlet and the defroster outlet.

2. The vehicle air conditioning control device according to claim 1.

3. The vehicle further includes an engine water temperature detector and an air volume detector that detect an engine water temperature and an air volume of the air conditioning air, respectively. The lead-out portion is using membership functions of fuzzy inference preset for the detection values ​​of the engine water temperature detection unit and the air volume detection unit, respectively, to classify the detected value of the engine water temperature as an element into high / low engine water temperature and the detected value of the air volume detection unit into strong / weak air volume, and deriving a weighted correction value for flushing for determining whether the occupant is flushed or not from a combination of these classification results, the correction value becoming higher as the degree of flushing becomes lower; The control unit If the sum of the weighting correction value for the window fogging and the weighting correction value for the facial flushing derived by the derivation unit is equal to or greater than a preset value, it is determined that the window is fogging and the facial flushing is not present, and the blowing state of the conditioned air from the foot outlet and the defroster outlet is controlled.

3. The vehicle air conditioning control device according to claim 2.

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