JPH0616029A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE:To correct drive control characteristics in response to the degree of the clouding of window glass with a drive mode manually set by a crew, and thereby prevent window glass from being clouded up at next automatic control. CONSTITUTION:When a diffuser mode setter 47 is operated by a crew, the degree of the cloud of window glass is operated by a control means 50 based on thermal environmental information such as detected temperature, outside air temperature and the like, and when the degree of the cloud of window glass is found to have been equal to or more than a specified value, drive control characteristics are then corrected in response to the degree of the cloud of window glass. By this constitution, an air conditioner main body 1 is driven based on corrected drive control characteristics at the time of the following automatic control, so that window glass is automatically prevented from being clouded up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle which automatically adjusts the air conditioning condition in a vehicle compartment to a target air conditioning condition.

[0002]

2. Description of the Related Art Some automotive air conditioners have a set room temperature set by a passenger's operation, a room temperature detected by a room temperature sensor provided in the passenger compartment (hereinafter simply referred to as a detected room temperature), and a vehicle body provided. Based on the thermal environment information inside and outside the vehicle, such as the amount of solar radiation detected by the solar radiation sensor and the outside air temperature detected by the outside air temperature sensor provided on the vehicle body, the target blow-out temperature as the optimum target air conditioning condition is calculated. A so-called automatic air conditioner (automatic air conditioner) is known that blows conditioned air into the vehicle compartment based on the target blowout temperature according to preset control characteristics so that the air conditioning state in the vehicle compartment becomes the target air conditioning condition. Has been.

The control characteristics of this automatic air conditioner are uniquely created based on the human sense of warmth and coolness. However, there are individual differences in human thermal sensation, and it is extremely difficult to uniquely determine control characteristics.

Therefore, for example, as disclosed in Japanese Patent Laid-Open No. 3-54015, an automatic air conditioner has been proposed in which the control characteristics are sequentially corrected in accordance with the occupant's sense of temperature.

[0005]

However, in the automobile air conditioner disclosed in Japanese Patent Laid-Open No. 3-54015, the control characteristic is corrected based on the operation of the occupant.
In some cases, fogging of windows may easily occur during automatic control based on the corrected control characteristics.

In other words, as the air outlet mode during automatic control, vent mode: Air conditioning air is blown out only from the ventilator air outlet Bi-level mode: Air conditioning air is blown out from the ventilator air outlet and the foot air outlet Foot mode: Air conditioning air The three outlet modes are used, which are to blow out from the foot outlet and the defroster outlet. And
When the outside temperature is low in winter (when the target blowing temperature is low), by blowing in the foot mode, the defroster outlet is constantly opened to prevent window fogging. However, if the control characteristics of the outlet mode are corrected according to the operation of the occupant, for example, if the occupant uses the bi-level mode a lot, the bi-level mode blows out the window even when the outside temperature is low in winter. Fogging is likely to occur.

Therefore, according to the present invention, when an occupant automatically sets a drive mode such as an outlet mode, the drive control characteristic is corrected according to the degree of window fogging at that time, and window fogging at the next automatic control is avoided. The task is to do.

[0008]

The first invention is shown in FIG.
As shown in (A), the driving means b of the air conditioner main body is driven by the thermal environment information inside and outside the vehicle such as the detected room temperature, the outside air temperature, the amount of solar radiation, and the set room temperature input from the thermal environment information detecting means a. In a vehicle air conditioner equipped with a drive control means c for air-conditioning the interior of a vehicle, a manual setting means d for setting a drive mode of the drive means by an occupant's operation, and a window for calculating a window fogging degree based on the thermal environment information. When the degree of window fogging is compared with a preset reference value by inputting the driving mode from the degree of fog computing means and the manual setting means d, and when the degree of window fogging is equal to or greater than the reference value, avoidance according to the degree of window fogging And a correction unit f that outputs a correction output to the drive control unit c.

The second invention is, as shown in FIG. 1 (B),
Drive control for driving the driving means b of the air conditioner main body to air-condition the vehicle interior based on the thermal environment information such as the detected room temperature, the outside air temperature, the amount of solar radiation, and the set room temperature input from the thermal environment information detecting means a. In an automobile air conditioner equipped with means c, a manual setting means d for setting a drive mode of the driving means b by an operation of an occupant, a window fog degree calculation means e for calculating a window fog degree based on the thermal environment information, Based on the drive mode input from the manual setting means d, the target blowout temperature calculated from the thermal environment information inside and outside the vehicle interior, and the window fog degree from the window fog degree calculation means e, the drive control means c is previously notified. Drive characteristic learning correction means g for learning and correcting the set drive characteristics, and blowing based on the target blow temperature and the blowing characteristics stored by the drive control learning correction means at all times. Perform teeth, said manual setting means d
When the window fogging degree is equal to or higher than the reference value according to the signal from the drive characteristic learning correction means g according to the window fogging degree.
The control means h for outputting to the drive control means c an avoidance correction output different from the drive control characteristics learned and corrected in step 1. Note that learning means, when the drive mode is manually set, searches for a difference between the drive mode manually selected and the drive mode selected from the thermal environment information, and determines whether window fogging is likely to occur. Is to judge.

According to a third aspect of the present invention, the window fogging degree calculating means e in the first or second aspect of the present invention uses the detected room temperature, the relative humidity of the air in the passenger compartment, and the temperature of the air immediately after passing through the evaporator to dew the air near the inside of the passenger compartment of the windshield. Dew point temperature calculation means for calculating the temperature, glass near air temperature calculation means for calculating the vehicle interior air temperature near the front window glass from the detected room temperature, blown air temperature, and blowout port mode, and the front from the glass near air temperature calculation means A glass inside surface temperature calculating means for calculating the inside surface temperature of the inside of the windshield from the inside air temperature, outside air temperature, and heat transfer characteristics of the windshield, and a windshield from this inside glass surface temperature calculating means. Front window from the vehicle interior surface temperature and the dew point temperature calculation means It is provided with means for calculating the window fog degree corresponding to the temperature difference between the dew point temperature of the lath passenger compartment side near the air.

According to a fourth aspect of the present invention, the correction means f in the first invention or the control means h in the second invention obtains a weight according to the degree of window fog, and the correction width of the avoidance correction output is changed by this weight. Means are provided.

According to a fifth aspect of the invention, the correction means f in the first aspect of the invention or the control means h in the second aspect of the invention has a blowout mode as a drive mode, and the window fogging degree is a reference value or more, and the blowout mode is There is provided means for selecting a blowout port mode including opening of the defroster blowout port when the maintenance time corresponding to the passenger's satisfaction with respect to is longer than the set time.

[0013]

In the first aspect of the invention, when the occupant operates the manual setting means d to manually set any one of the drive modes such as the air volume, the air outlet mode and the intake mode, the drive means b is manually controlled. On the other hand, the window fogging degree calculation means e
From the thermal environment information from the thermal environment information detecting means a at that time, the possibility of window fogging as the degree of window fogging is calculated and output to the correcting means f. Then, the correction unit f compares the window fog level with the reference value, and when the window fog level is equal to or higher than the reference value, the avoidance correction output corresponding to the window fog level is output to the drive control unit c. As a result, during automatic control, the drive means b is driven based on the corrected drive control characteristics in the drive control means c, and window fogging is automatically prevented.

In the second aspect of the invention, when the occupant operates the manual setting means d to manually set one of the drive modes such as the air volume, the air outlet mode and the intake mode, the drive means b is manually controlled. On the other hand, window fogging degree calculation means e
However, the possibility of window fogging as the window fogging degree is calculated from the thermal environment information from the thermal environment information detecting means a at that time and is output to the drive characteristic learning correction means g and the control means h. Then, the drive characteristic learning correction means g is set by the manual setting means d.
Is preset in the drive control means c from the drive mode input from the above, the target blowing temperature calculated from the thermal environment information inside and outside the vehicle interior at that time, and the window fog degree from the window fog degree calculation means e. The existing drive control characteristics are learned and corrected and output to the control means h. Then, the control means h compares the window fog degree from the window fog calculation means e with a reference value,
When the window fogging degree is equal to or higher than the reference value, an avoidance correction output different from the drive control characteristic from the drive control characteristic learning correction means g is output to the drive control means c according to the window fogging degree. Thus, during the manual control, the control means h learns whether or not the window fogging is likely to occur, and when the window fogging is less likely to occur, the drive characteristic is corrected according to the drive mode. When there is a possibility of fogging of the window during the subsequent automatic control, the driving means b is driven based on the avoidance output different from the corrected drive control characteristic in the driving control means c, and the fogging of the window is caused. Automatically prevented.

In the third invention, the window fogging degree calculating means e
When calculating the degree of window fogging, first, the vehicle interior air temperature near the windshield is calculated, and the front window glass vehicle interior surface temperature is calculated using this vehicle interior air temperature near the windshield. In parallel with this, the dew point temperature of the air near the inside of the windshield passenger compartment is calculated. Finally, the degree of window fogging is calculated according to the temperature difference between the dew point temperature of the air near the inside of the windshield vehicle and the surface temperature of the inside of the windshield vehicle.

According to the fourth aspect of the invention, when the correction means f or the control means h corrects the drive control characteristic, the correction width of the avoidance output is changed by the weight obtained according to the degree of window fogging.

In the fifth aspect of the invention, when the correction means f or the control means h corrects the drive control characteristic, when the window fogging degree is equal to or higher than the reference value and the occupant satisfies the current outlet mode, Select the outlet mode, including opening the defroster outlet.

[0018]

【Example】

First Embodiment FIG. 2 shows an automobile air conditioner as a first embodiment. In FIG. 2, the air conditioner body 1 includes a blower unit 2, a cooling unit 3, and a heater unit 4.
And the duct unit 5.

The blower unit 2 has an outside air inlet 6 and
Inside air inlet 7, intake door 8 and blower fan 9
And are provided. The outside air introduction port 6 receives the traveling wind pressure to introduce outside air. The inside air introduction port 7 introduces the air in the vehicle compartment. The intake door 8 opens and closes the outside air introduction port 6 and the inside air introduction port 7 at an arbitrary ratio by an actuator 10 driven by a control device 50 described later. Blower fan 9
It is rotationally driven by a blower fan motor 11 as an actuator driven by the control device 50.

The cooling unit 3 is provided with an evaporator 12. The evaporator 12 is a refrigerant supplied from a refrigeration cycle including a compressor (not shown), a condenser (not shown), an expansion valve (not shown), and the like, and cools passing air.

The heater unit 4 includes a heater core 13
, Air mix door 14 and air mix chamber 1
5 are provided. The heater core 13 warms the passing air with hot water supplied from a heating cycle including an engine (not shown), a hot water cock (not shown), an expansion valve (not shown), and the like. The air mix door 14 is cooled by passing through the evaporator 12 by the actuator 16 driven by the control device 50, and the cold air that bypasses the heater core 13 and remains cold and passes through the evaporator 12 and is cooled. The air is opened and closed so as to adjust the ratio with the warm air warmed by passing through the heater core 13.

The duct unit 5 includes a defroster duct 17, a ventilator duct 18, and a foot duct 19
Defroster door 20, ventilator door 21,
A foot door 22 is provided. Defroster duct 17
Is connected to a defroster outlet 24 provided in the instrument panel 23, and blows the conditioned air toward a front window (not shown). Defroster outlet 2
A louver 25 as a wind direction setting device is provided in the No. 4.
The ventilator duct 18 is the instrument panel 2
3 is connected to a ventilator outlet 26 provided in No. 3, and blows conditioned air toward the upper body of the occupant. The ventilator outlet 26 has a louver 2 as a wind direction setting device.
7, 28 are provided. The air outlet of the foot duct 19 blows the conditioned air toward the feet of the occupant. Each of the defroster door 20, the ventilator door 21, and the foot door 22 has an actuator 29 driven by a controller 50,
The defroster duct 17, the ventilator duct 18, and the foot duct 19 are individually opened / closed by 30, 31. A display 32 is provided on a portion of the instrument panel 23 that is easily seen by an occupant. The display 32 allows the occupant to visually recognize or hear the control information of the air conditioner, such as the thermal environment information, the target air conditioning condition, or the actual blown air temperature, based on the output from the control device 50. And is composed of, for example, a light emitting device or a sound generating device.

The thermal environment information detecting means 35 detects a plurality of thermal environment information inside and outside the vehicle, and is the room temperature sensor 3.
6, an outside air temperature sensor 37, a solar radiation amount sensor 38, and a room temperature setting device 39. The room temperature sensor 36 detects the current ambient temperature in the vehicle compartment as the detected room temperature Tic, and the controller 50 detects the amount of electricity according to the detected room temperature Tic.
Output to. The outside air temperature sensor 37 detects the current ambient temperature outside the vehicle compartment as an outside air temperature Tamb, and detects the outside air temperature Ta.
The amount of electricity according to mb is output to the control device 50. The solar radiation amount sensor 38 outputs an electric amount corresponding to the received solar radiation amount Qsun to the control device 50. The room temperature setting device 39 is generally provided on an air-conditioning operation panel (not shown) arranged in a portion of the passenger compartment where the occupant can easily operate, and the air-conditioning switch (A / C switch) 4
4, auto switch 45 and blower fan switch 4
6 and the intake mode setting device 47 and the outlet mode setting device 48, the temperature desired by the occupant is set as the set room temperature Tset by the operation of the occupant, and the amount of electricity according to the set room temperature Tset is controlled by the control device. Output to 50.

Air temperature sensor 40 immediately after passing through the evaporator
Is provided on the air downstream side of the evaporator 12, detects the air temperature immediately after passing through the evaporator 12 as the air temperature Tint immediately after passing through the evaporator 12, and supplies the controller 50 with an electric quantity according to the detected evaporator passing air temperature Tint. Output.

Front windshield temperature sensor 41
Is provided in a portion that is not easily influenced by solar radiation, for example, in a center pillar portion (not shown), detects the temperature of the front windshield as the front windshield temperature Tw, and calculates the amount of electricity according to the detected front windshield temperature Tw. Is output to the control device 50.

The vehicle interior relative humidity sensor 42 is provided in the vehicle interior, detects the vehicle interior relative humidity Hic, and outputs an amount of electricity corresponding to the detected vehicle interior relative humidity Hic to the control device 50.

The control device 50 is constituted by a microcomputer which is activated by turning on the air conditioner switch 44, and is operated by operating the blower fan switch 46, the intake mode setting device 47 and the outlet mode setting device 48. In accordance with the manual program preset as the system base, the detection room temperature Tic becomes the set room temperature Tset,
The air conditioner body 1 is drive-controlled. In the drive control by this manual program, the air volume of the conditioned air is selected by the operation amount of the blower fan switch 46 by the occupant.
As the intake mode, one of the inside air circulation mode, the outside air introduction mode, and the half inside air circulation / semi outside air introduction mode is selected by the operation of the intake mode setting device 47 by the occupant. As the outlet mode, one of a foot mode, a bi-level mode, a vent mode, etc. is selected by the operation of the occupant of the outlet mode setting device 48.

The blower fan switch 46, the intake mode setting device 47, and the outlet mode setting device 48 constitute manual setting means 49.

Further, the control device 50 includes the auto switch 4
According to the thermal environment information such as the detected room temperature Tic, the outside air temperature Tamb, the amount of solar radiation Qsun, and the set room temperature Tset according to the auto program preset in the memory of the microcomputer as an on-operation of No. 5 of the vehicle interior. The air conditioner body 1 is drive-controlled so that the thermal environment state becomes the target thermal environment state. In FIG. 1, reference numeral S ₁ is a signal line from the control device 50 to the actuator 29, S ₂ is a signal line from the control device 50 to the display 32, and S _{3 is}
Is a signal line from the air temperature sensor 40 to the controller 50 immediately after passing through the evaporator.

The operation of the first embodiment will be described in detail with reference to the flow chart shown in FIG.

When the air conditioner switch 44 is turned on and the air conditioning control starts in step 101, step 102
In step 10, initial setting of each control constant is performed, and step 10
3, the detected room temperature Tic, the outside air temperature Tamb, the set room temperature Tset, and the solar radiation amount Qsun output from the room temperature sensor 36 and the outside air temperature sensor 37, the solar radiation amount sensor 38, and the room temperature setting device 39, respectively, are the target blowing temperature formulas, Tof = A x Tic + B x Tamb + C x Tset + D
Substituting xQsun + E (A, B, C, D, and E are constants) to calculate the target outlet temperature Tof.

In step 104, the target blow temperature Tof is substituted into the air mix door opening expression, X = F × Tof ² + G × Tof + H (F, G and H are constants), and the air mix door opening X is calculated. Then, a drive signal is output to the actuator 16 to drive the air mix door 14.

In steps 105, 106 and 107, the drive mode determined by the control characteristics corresponding to the target blowout temperature Tof stored in advance is determined, and the blower fan motor 11 and the actuators 10, 16, 29 and 3 are determined.
The drive signal is output to 0 and 31. And step 10
At 8, one cycle of air conditioning control is completed. In addition, this air conditioning control is until the air conditioner switch is turned off.
Repeated.

The outlet mode control shown in step 107 will be described in detail with reference to the flow charts shown in FIGS.

When the air outlet mode control is started in step 201, it is determined in step 202 whether the air outlet mode is set manually. That is,
When the occupant operates the auto switch 45 and the blow-out mode automatic control is selected (step 202 is N
In O), the process proceeds to step 203, and the outlet mode automatic control shown in (1) below is performed. On the contrary, when the passenger operates the outlet mode setter 48 and the outlet mode manual control is selected (YES in step 202).
In step 210, the outlet mode manual control shown in (2) below is performed.

(1) In the case of automatic control of the outlet mode, in step 203, the target outlet temperature Tof
Is input, and in step 204, the outlet mode according to the target outlet temperature Tof is selected according to the outlet mode map corresponding to the outlet control characteristics. This outlet mode map is step 204.
As shown in, the foot mode: the defroster door 20 and the foot door 22 are opened, the ventilator door 21 is closed, and the conditioned air is blown into the defroster air outlet 24 and the foot outlet according to the value of the target air outlet temperature Tof. -Level mode in which air is blown from the passenger compartment into the passenger compartment: Ventilator door 21 and foot door 2
2 is opened, the defroster door 20 is closed, and the conditioned air is blown out from the ventilator outlet 26 and the foot outlet. Vent mode: The ventilator door 21 is opened and the defroster door 20 and the foot door 22 are closed. The air-conditioning air is blown out only from the ventilator outlet 26, and the outlet mode is selected from the three modes. That is, the outlet mode is changed in the order of the vent mode, the bi-level mode, and the foot mode as the target outlet temperature Tof changes from low to high. As a result, the vent mode is selected when the target blowout temperature Tof is low as in summer, the bilevel mode is selected in the intermediate period as in spring and autumn, and the foot mode is selected as high in winter. The boundary temperature T ₁ of the vent mode and the bi-level mode, the boundary temperature T ₂ each of the bi-level mode and the foot mode, in order to prevent hunting of each door, hysteresis α
Is provided. Then, the values of these boundary temperatures T ₁ and T ₂ are calculated in steps 216, 218, 220 and 221 described later.
As shown in, the correction is made by the manual setting of the blowout port mode by the occupant. Also, the target outlet temperature Tof
Is usually 30 ° C. or higher when the outside temperature is low in winter.
Therefore, the boundary temperature T ₂ between the bi-level mode and the foot mode at the initial setting is set to 30 ° C., for example.
Therefore, unless the boundary temperature T ₂ between the bi-level mode and the foot mode at the time of initial setting is changed, the outlet mode in winter is almost the foot mode. That is, at the time of low outside temperature in winter, the foot door 22 and the defroster door 20 are opened, and the airflow having a high temperature and a low relative humidity is generated.
It blows out toward the windshield to avoid fog windows.

Subsequently, in step 205, it is judged whether or not the thermal environment at that time is likely to cause window fogging. That is, the target outlet temperature Tof is equal to or lower than the reference value Ta, or the detected room temperature Tic and the outside temperature Tamb.
When the temperature difference with the temperature difference is less than another reference value Tb (step 20
(5 is NO) means that there is no possibility of window fogging. On the contrary, if the target outlet temperature Tof is higher than the reference value Ta or the temperature difference Tic-Tamb is higher than the reference value Tb (YES in step 205), it means that the window fogging is likely to occur. . Here, as the reference value Ta, for example, 35 ° C. is set. Further, another reference value Tb is calculated by the dew point temperature in the passenger compartment obtained from the moist air diagram outside the drawing. For example, when the room temperature is 25 ° C. and the humidity is 50%, the dew point temperature of the air is about 13 ° C., and the inside temperature of the windshield is about 13 ° C. or less, that is, when the temperature difference of Tic-Tamb is 12 ° C. or more. Indicates that the window fogging is likely to occur, so the reference value Tb at this time is 12 ° C.

That is, by determining the degree of fogging of the window,
When there is almost no possibility of window fog (Step 2
If NO in 05), in step 208, the drive signals are set to the actuators 29, 30, 3 so that the outlet mode selected by the outlet mode map is set.
Output to any one of 1.

On the contrary, if the window fogging is likely to occur according to the degree of window fogging (YES in step 205), it is determined in step 206 whether the outlet mode selected from the outlet mode map is the foot mode. to decide.

If the outlet mode is the foot mode (YES in step 206), step 20
Proceed to 8 to maintain the current outlet mode.

On the contrary, when the outlet mode is other than the foot mode (NO in step 206), step 20
In 7, output a switching signal to the foot mode,
In step 208, the door opening signal is output to the actuators 29, 30 to open the defroster door 20 and the foot door 22, and the outlet mode is changed to the foot mode. As a result, the conditioned air is blown out toward the windshield to avoid the window fog condition.

(2) In the case of manual control of the outlet mode, in step 210, the target outlet temperature Tof
In step 211, it is determined whether the outlet mode selected by the operation of the passenger's outlet mode setting device 48 matches the outlet mode selected from the outlet mode map in step 204.

If the outlet modes match (YES in step 211), the outlet mode selected by the operation of the outlet mode setter 48 in step 222 without correction of the outlet mode thereafter. The drive signal is output to one of the actuators 29, 30, and 31 so that the mode is set.

On the contrary, when the outlet modes do not match (NO in step 211), the outlet mode set by the operation of the occupant is determined in step 212, and the vent mode, the bi-level mode and the foot mode are respectively determined. According to the above, the process proceeds to steps 213, 214 and 215.

(A) If the outlet mode is the vent mode by the operation of the passenger, step 2
13, the target outlet temperature Tof and the boundary temperature T ₁
It is determined whether the temperature difference between and is smaller than the threshold value β.

If the temperature difference of Tof-T ₁ is equal to or larger than the threshold value β (NO in step 213), the flow outlet mode map is not corrected and the process proceeds to step 222.

On the contrary, when the temperature difference Tof-T ₁ is less than the threshold value β (YES in step 213), in step 216, the value obtained by multiplying the temperature difference Tof-T ₁ by the weight W is set as the boundary. by adding to the temperatures T _1, corrects the boundary temperatures T ₁ in outlet mode map, the process proceeds to step 222.

(B) If the outlet mode is the bilevel mode due to the operation of the occupant, it is determined in step 214 whether the target outlet temperature Tof is lower than the boundary temperature T ₁ .

When the target outlet temperature Tof is lower than the boundary temperature T ₁ (YES in step 214), it is determined in step 217 whether the temperature difference T ₁ -Tof is smaller than the threshold value β.

If the temperature difference T ₁ -Tof is equal to or larger than the threshold value β (NO in step 217), the flow outlet mode map is not corrected and the process proceeds to step 222.

[0051] Conversely, if the temperature difference becomes Tof-T ₁ is less than the threshold value beta (Step 217 YES), in step 218, the boundary value multiplied by weight W to a temperature difference obtained as T ₁ -TOF The boundary temperature T ₁ in the outlet mode map is corrected by subtracting from the temperature T ₁ ,
Proceed to step 222.

When the target outlet temperature Tof is equal to or higher than the boundary temperature T ₁ (NO in step 214), it is determined in step 219 whether the temperature difference Tof-T ₂ is smaller than the threshold value β.

If the temperature difference of Tof-T ₂ is equal to or larger than the threshold value β (NO in step 219), the flow outlet mode map is not corrected and the process proceeds to step 222.

On the contrary, when the temperature difference of Tof-T ₁ is less than the threshold value β (YES in step 219), in step 220, the value obtained by multiplying the temperature difference of Tof-T _{2 by} the weight W is set as the boundary. by adding to the temperature T _2, to correct the boundary temperature T ₂ in the outlet mode map, the process proceeds to step 222.

(C) If the outlet mode is set to the foot mode by the operation of the occupant, step 2
15, the boundary temperature T ₂ and the target blowing temperature Tof
It is determined whether the temperature difference between and is smaller than the threshold value β.

When the temperature difference T ₂ -Tof is equal to or larger than the threshold value β (NO in step 215), the flow outlet mode map is not corrected and the process proceeds to step 222.

On the contrary, when the temperature difference T ₂ -Tof is less than the threshold value β (YES in step 215), in step 221, the value obtained by multiplying the temperature difference T ₂ -Tof by the weight W is set as the boundary. The boundary temperature T ₂ in the outlet mode map is corrected by subtracting from the temperature T ₂ ,
Proceed to step 222.

In short, in an automobile air conditioner capable of correcting the control characteristics according to the operation of the occupant, for example, when the bi-level mode is frequently used by the operation of the occupant during a low outside temperature in winter, one of the control characteristics is The boundary temperature T ₂ becomes higher than the initial setting by learning the outlet mode map. Therefore, in general, at low outside temperatures,
The bi-level mode is automatically selected as the outlet mode, and since the front window glass surface temperature is low, window fog may easily occur. In such a case, according to the first embodiment, when the blowout port mode is changed to the desired blowout port mode by the operation of the occupant, it is monitored whether or not the window fogging is likely to occur, and The correction amount of the outlet mode map is changed according to the degree of possibility of becoming cloudy (the degree of window fogging), and the boundary temperature T _{1 of the} outlet mode map by the occupant's operation in an environment where window fog is likely to occur. , T ₂ is suppressed, so that the possibility of falling into the window fog can be reduced as compared with the initial blowing mode map when the blowing mode for the next use is automatically selected. Therefore, the window fogging prevention performance can be improved.

Second Embodiment In the second embodiment, when controlling the outlet mode,
It is characterized in that the driving mode such as the intake mode and the operating state of the compressor is also checked to avoid window fogging.
Therefore, this second embodiment will be described based on the flowcharts shown in FIGS. 6 and 7. In the description of the second embodiment, the reference numerals given to the names of the constituent parts of the automobile air conditioner are based on FIG.

When the outlet mode control is started in step 301, the value of the window fogging degree determination flag Dflg is calculated in step 302 in order to determine whether or not the thermal environment at that time is likely to cause window fogging. The process is performed according to the flowchart shown in FIG. Subsequently, in step 303, the target outlet temperature Tof is input, and in step 304, the outlet mode according to the target outlet temperature Tof is selected according to the outlet mode map corresponding to the outlet control characteristics. As shown in step 304, this blowout port mode map selects any one of the foot mode, the bilevel mode, and the vent mode according to the value of the target blowout temperature Tof. The values of the boundary temperatures T ₁ and T _{2 in} the outlet mode map are set in Step 3 described later.
As indicated by 32, 335, 338, and 340, the correction is performed by the manual setting of the outlet mode by the occupant.

Subsequently, in step 305, it is determined whether or not the air outlet mode is manual setting. That is, when the occupant operates the auto switch 45 and the outlet mode automatic control is selected (NO in step 305), the process proceeds to step 306, and the outlet mode automatic control shown in (1) below is performed. . On the contrary, when the occupant operates the outlet mode setting device 48 and the outlet mode manual control is selected (YES in step 305).
In S), the process proceeds to step 322, and the outlet mode manual control shown in (2) below is performed.

(1) In the case of the automatic outlet mode control, it is determined in step 306 whether the value of the window fog degree determination flag Dflg is "3".

The window fogging degree determination flag Dflg
= 3 (YES in step 306), there is almost no possibility of window fogging and it means that the current outlet mode should be maintained as it is. Therefore, in step 307, the outlet mode is changed. The counter Cmode for determining whether or not it is reset and the counter Cd for measuring the elapsed time at the time when the window fog preventing outlet mode is set are reset, and counting is stopped. Subsequently, in step 342, the current value of the window fogging degree determination flag Dflg is stored as Dflg ₀ , and then in step 343, the drive signal is output to the actuator 29, so that the air outlet mode selected by the air outlet mode map is set. 30, 31
Output to any of.

On the contrary, the window fogging degree determination flag Dflg =
In the case of 1 or 2 (step 306 is NO), in step 308, the window fogging degree determination flag Dflg
It is determined whether the value of is smaller than the previous value Dflg ₀ . That is, the window fogging degree determination flag Dflg is "3.
From 2 to 1 ”or from“ 2 to 1 ”, and it is determined whether or not the window fogging is more likely to occur than the previous time.

Then, the window fogging degree determination flag Dflg
If there is little possibility of window fogging (step 308 is NO), the value of the counter Cd is changed to the value of the counter Cd in step 309. Is larger than the reference value Cd ₀ .

The value of the counter Cd is the reference value Cd _0.
In the above case (YES in step 309), the process proceeds to step 310. If the value of the counter Cd is less than or equal to the reference value Cd ₀ (NO in step 309), the actuator 2
This means that the changed outlet mode has not been completely switched to due to factors such as the response delays of 9, 30, and 31, and so the process proceeds to step 342 to maintain the current state.

On the contrary, if the value of the window fogging degree determination flag Dflg is less than the previous value Dflg ₀ and window fogging easily occurs (YES in step 308), or the count C
When the value of d is larger than the reference value Cd ₀ (step 309)
Is YES), which means that the effect in the current outlet mode is not seen and it is necessary to change to a new outlet mode, so in step 310, the counter Cd is reset and counting is started. Then, in step 311, it is determined whether the intake mode is the outside air introduction mode or the inside air circulation mode in order to prevent the window fogging by changing the outlet mode.

Then, in the inside air circulation mode (step 311 is inside air), in step 312, the inside air circulation mode is switched to the outside air introduction mode by the intake mode control (see step 108 in FIG. 3), and the outside air introduction signal is sent. Output to the actuator 10 to drive the intake door 8 to open the outside air introduction port 6 and proceed to step 342 to maintain the current outlet mode. This is because, in general, when the outside air temperature is low, the outside air has a lower dew point temperature than the inside air, and therefore it is a good idea to introduce the outside air in order to prevent window fogging easily.

On the other hand, if the outside air introduction mode has already been entered (step 311 is outside air), it is judged in step 313 whether the compressor in the refrigeration cycle of the evaporator 12 is operating.

If the compressor is not operating (NO in step 313), it is determined in step 314 whether the air temperature Tint immediately after passing the evaporator detected by the air temperature sensor immediately after the evaporator is lower than the evaporator freezing critical temperature Tlim.

Then, immediately after passing through the evaporator, the air temperature T
If int is higher than the evaporator freezing critical temperature Tlim (step 314 is NO), the evaporator 12
Does not freeze, so in step 315, a compressor drive signal is output to a compressor motor (not shown) to drive the compressor, and then step 3
Proceeding to 42, the conditioned air having a low relative humidity is blown into the vehicle interior.

On the contrary, the air temperature Ti immediately after passing through the evaporator
If nt is equal to or lower than the evaporator freezing critical temperature Tlim (YES in step 314), the evaporator 12 is frozen and the heat exchange rate with the refrigerant is reduced because the evaporator 12 is frozen.
It means that the compressor may cause liquid compression, so proceed to step 316.

Subsequently, when the compressor is in operation (YES in step 313) or when the compressor is not in operation but the air temperature Tin immediately after the evaporator is Tin.
When t is equal to or lower than the evaporator freezing critical temperature Tlim (YES in step 314), it is determined in step 316 whether the value of the window fogging degree determination flag Dflg is "1" or "2".

Then, the window fogging degree determination flag Dflg
Is "2" (NO in step 316), it means that the window does not immediately become clouded and there is no problem in maintaining the current outlet mode, so proceed to step 342. , Maintain the current outlet mode.

On the contrary, if the window fogging degree determination flag Dflg is "1" (YES in step 316), it means that there is a high possibility that the window fogging state will occur immediately. Cmode is reset to start counting, and in step 318, it is determined whether the outlet mode selected from the outlet mode map is the foot mode.

If the outlet mode is other than the foot mode (NO in step 318), step 3
19, the value of the counter Cmode is the reference value Csa.
Judge whether or not t is exceeded.

When the value of the counter Cmode is equal to or greater than the reference value Csat (NO in step 319), the door opening signal is output to the actuators 29 and 30 in step 320 to output the defroster door 20 and the foot door 2 to each other.
2 and 2, the outlet mode is changed to the foot mode, and the process proceeds to step 342. As a result, high-temperature conditioned air with low relative humidity is blown toward the windshield, and the window fogging state is immediately avoided.

If the outlet mode is the foot mode (YES in step 318), or
When the outlet mode is other than the foot mode, but the value of the counter Cmode is less than the reference value Csat (YES in step 319), the air mix door opening increase signal is output to the actuator 16 in step 321 to output the air. The opening degree of the mix door 14 is increased to increase the inflow rate of the cool air after passing through the evaporator into the heater core 13 to increase the temperature of the conditioned air, and the process proceeds to step 342.
As a result, the hotter air-conditioning air having a lower relative humidity is blown toward the windshield, and the window fogging state is immediately avoided.

Here, the larger the reference value Csat is, the longer the time for maintaining the blowout port mode at the present state is. The magnitude of the reference value Csat affects the response of the change of the blowout port mode. . Then, the reference value Csat is set in steps 333, 336, 393 described later.
It is set according to the outlet mode characteristic maintenance time tsat in 341. This outlet mode characteristic maintenance time t
The sat is a maintenance time of the outlet mode characteristics switched according to the heat load inside and outside the vehicle, and is a time for detecting the occupant's satisfaction with the switched outlet mode. That is, the larger the value of the outlet mode characteristic maintenance time tsat, the more the passenger is satisfied with the outlet mode at that time.
It is desirable not to change the outlet mode map as much as possible. Therefore, as shown in FIG. 9, the larger the value of the outlet mode characteristic maintenance time tsat, the larger the value of the reference value Csat, and the slower the response of the outlet mode change. It should be noted that the numerical values in FIG. 9 are not limited to these values, and may be other values as long as the order of time is similar.

Further, the change of the opening degree of the air mix door 14 means the change of the temperature of the conditioned air blown into the passenger compartment, and the change of the temperature of the conditioned air is one of the thermal environment factors affecting the comfort. It has a larger effect than changes in relative humidity. Therefore, in the step 321, the air mix door 1
The opening degree change of 4 is finally performed. However,
The change in the temperature of the conditioned air blown into the passenger compartment does not occur immediately after the opening of the air mix door 14 is changed, and there is some time to spare. If is a slight change, it does not impede comfort. On the other hand, when the outlet mode is changed, the blowing state of the conditioned air is changed immediately after the actuators 29, 30, 31 and the like are actuated, so that the change in comfort is large. However, in order to prevent window fogging, changing the conditioned air with low relative humidity to the foot mode in which the wind is blown directly on the windshield has a quicker effect than changing the opening of the air mix door 14, and its effect. Is big. Therefore, whether to prioritize the comfortability maintainability or the anti-fog quick effect is determined in Step 31.
In 9, the determination is made by referring to the preference of the occupant in the air outlet mode.

(2) In the case of the manual control of the outlet mode, the outlet mode selected by the operation of the outlet mode setting device 48 by the occupant in step 322 is the outlet selected from the outlet mode map in step 304. Judge whether it matches the mouth mode.

If the outlet modes match (YES in step 322), the process proceeds to step 342 without correcting the outlet mode thereafter.

On the contrary, when the outlet modes do not match (NO in step 322), the window fogging degree determination flag Dflg calculated in step 302 is "1" in step 323, and window fogging is most likely to occur. Judge whether the state.

Then, the window fogging degree determination flag Dflg
If = 1 (YES in step 323), it means that the setting of the blowout port mode by the occupant was manually operated in a state where the window fogging is likely to occur. Therefore, the change to the blowout port mode in which the window fogging is likely to occur. Is ignored without learning and the process proceeds to step 342.

Conversely, the window fogging degree determination flag Dflg ≠
In the case of 1 (step 323 is NO), step 32
4, it is determined whether the value of the window fogging degree determination flag Dflg is "2".

Subsequently, the window fogging degree determination flag Dfl
When g = 2 (YES in step 324), it is determined in step 325 whether the outlet mode is the foot mode.

[0087] Then, when outlet mode is other than a foot mode (other than step 325 foot mode), at step 326, sets the weight W used in correcting boundary temperature T _1, T ₂ and W ₂ , Step 328
Proceed to.

Conversely, the window fogging degree determination flag Dflg ≠
2 (NO in step 324) or the window fogging degree determination flag Dflg = 2, but when the outlet mode is the foot mode (step 325 is the foot mode), the weight W is set in step 327. W ₁
Then, the process proceeds to step 328. Note that W ₁ and W ₂ have a relationship of W ₁ > W ₂ . Therefore, as the weight W, a large value W ₁ is used when window fogging is unlikely to occur, and a small value W ₂ is used when window fogging is likely to occur. That is, in the processing from steps 324 to 327, the correction widths of the boundary temperatures T ₁ and T ₂ of the outlet mode map are set according to the degree of window fogging.

Subsequently, in step 328, the outlet mode set by the occupant's operation is determined, and the process proceeds to steps 329, 330, 331 according to the vent mode, the bilevel mode, and the foot mode, respectively.

(A) If the outlet mode is set to the vent mode by the operation of the occupant, step 3
29, the target outlet temperature Tof and the boundary temperature T ₁
It is determined whether the temperature difference between and is smaller than the threshold value β.

When the temperature difference of Tof-T ₁ is equal to or larger than the threshold value β (NO in step 329), the outlet mode map is not corrected and the process proceeds to step 342.

On the contrary, if the temperature difference of Tof-T ₁ is less than the threshold value β (YES in step 329), the value obtained by multiplying the temperature difference of Tof-T ₁ by the weight W is set as the boundary in step 332. by adding to the temperatures T _1, corrects the boundary temperatures T ₁ in outlet mode map, at step 333, after starting the counting of the outlet mode characteristic sustaining time tsat resets the timer,
Go to step 342. The timer for measuring the outlet mode characteristic maintenance time tsat is for detecting the satisfaction of the occupant with the outlet mode characteristic by measuring the time after the outlet mode is changed to the current outlet mode. Is. Note that this timer is counted only while the air conditioner is operating, and is initialized when the occupant turns on the air conditioner switch.

(B) When the outlet mode is the bi-level mode due to the operation of the passenger, it is determined in step 330 whether the target outlet temperature Tof is lower than the boundary temperature T ₁ .

If the target outlet temperature Tof is less than the boundary temperature T ₁ (YES at step 330), it is determined at step 334 whether the temperature difference T ₁ -Tof is smaller than the threshold value β.

If the temperature difference T ₁ -Tof is equal to or greater than the threshold value β (NO in step 334), the flow outlet mode map is not corrected and the process proceeds to step 342.

On the contrary, if the temperature difference of Tof−T ₁ is less than the threshold value β (YES in step 334), in step 335, the value obtained by multiplying the temperature difference of T ₁ −Tof by the weight W is set as the boundary. by adding to the temperatures T _1, corrects the boundary temperatures T ₁ in outlet mode map, at step 336, after starting the counting of the outlet mode characteristic sustaining time tsat resets the timer,
Go to step 342.

If the target outlet temperature Tof is equal to or higher than the boundary temperature T ₁ (NO in step 330), it is determined in step 337 whether the temperature difference Tof-T ₂ is smaller than the threshold value β.

If the temperature difference of Tof-T ₂ is greater than or equal to the threshold value β (NO in step 337), the flow outlet mode map is not corrected and the process proceeds to step 342.

On the contrary, when the temperature difference of Tof-T ₁ is less than the threshold value β (YES in step 337), in step 338, the value obtained by multiplying the temperature difference of Tof-T _{2 by} the weight W is set as the boundary. by adding to the temperature T _2, to correct the boundary temperature T ₂ in the outlet mode map, at step 339, after starting the counting of the outlet mode characteristic sustaining time tsat resets the timer, the process proceeds to step 342 .

(C) If the outlet mode is set to the foot mode by the operation of the occupant, step 3
31, the boundary temperature T ₂ and the target blowout temperature Tof
It is determined whether the temperature difference between and is smaller than the threshold value β.

If the temperature difference T ₂ -Tof is equal to or greater than the threshold value β (NO in step 331), the flow outlet mode map is not corrected and the process proceeds to step 342.

On the contrary, when the temperature difference T ₂ -Tof is less than the threshold value β (YES in step 331), in step 340, the value obtained by multiplying the temperature difference T ₂ -Tof by the weight W is set as the boundary. by adding to the temperature T _2, to correct the boundary temperature T ₂ in the outlet mode map, at step 341, after starting the counting of the outlet mode characteristic sustaining time tsat resets the timer,
Go to step 342.

On the other hand, the calculation of the value of the window fog degree determination flag Dflg shown in step 302 will be described in detail with reference to the flowchart shown in FIG. That is,
In step 401, the window fogging degree determination flag Df
When the calculation of the value of lg begins, in step 402,
The detected room temperature Tic and the outside air temperature Tamb are compared, and it is determined whether the temperature difference between the outside air temperature Tamb and the detected room temperature Tic is the specified value Td or more. The specified value Td is a low value of, for example, about 1 to 3 ° C.

If the temperature difference Tamb-Tic is less than the specified value Td and the outside air temperature Tamb is higher than the detected room temperature Tic by a certain temperature or more (NO in step 402), it means that the window fogging does not occur. Therefore, in step 403, the value of the window fogging degree determination flag Dflg is set to "3" which means that window fogging does not occur, and the process proceeds to step 414.

On the contrary, if the temperature difference of Tamb-Tic is equal to or greater than the specified value Td (YES in step 402), it means that window fogging may occur. Therefore, in step 404, the target outlet temperature Tof is set. In response to the,
It is determined whether the outlet mode selected from the outlet mode map (see step 304 described above) is the foot mode.

Then, when the outlet mode is the foot mode, in step 405, the value of the actual outlet air temperature Tout is calculated by Tout = η (Tw-Tint) + Tint (η: heater heat exchange rate), In step 406, the indoor air temperature Tag near the windshield is calculated by Tag = K ₀ · Tout + K ₁ (K ₀ , K ₁ : constant). That is, when the outlet mode is the foot mode, the defroster door 20 is opened and the conditioned air is blown from the defroster outlet 24 toward the windshield, so the indoor air temperature Tag near the windshield is: This is because the value is close to the temperature of the conditioned air from the defroster outlet 24. However, the heater heat exchange rate η can be experimentally obtained using the air mix door opening degree X as a variable.

Subsequently, in step 407, it is determined whether the intake mode is the internal air circulation mode or the external air introduction mode.

When the intake mode is the internal air circulation mode, it is determined in step 408 whether the compressor is operating.

When the intake mode is the internal air circulation mode but the compressor is operating (step 40)
8 is YES), or when the intake mode is the outside air introduction mode, in step 409, the air temperature Tint immediately after passing through the evaporator is set as the dew point temperature Tdp of the indoor air near the windshield, and the step 4 is performed.
Proceed to 12. That is, in this case, the air sucked into the air conditioner body 1 is either the outside air or the inside air that has been heat-exchanged by the evaporator 12.
For this reason, the dew point temperature Td of the conditioned air blown from the defroster outlet 24 toward the windshield is
p is unknown. However, the air that has been heat-exchanged by the evaporator 12 while the compressor is operating is generally low temperature (5 ° C. or lower) and high in relative humidity Hic. Therefore, the difference between the air temperature Tint immediately after passing through the evaporator and the dew point temperature is small. Further, even when the outside air is blown out in the compressor inoperative state, the conditioned air blown out from the defroster outlet 24 is only heated by the heater core 13 after passing through the evaporator 12. Therefore, the dew point temperature does not exceed the air temperature Tint immediately after passing through the evaporator. Further, in the case of low-temperature and high-humidity outside air where window fogging easily occurs, the air temperature Tint immediately after passing through the evaporator is a value close to the dew point temperature. Therefore, there is no problem in accuracy even if the air temperature Tint immediately after passing through the evaporator is used approximately as the dew point temperature Tdp of the indoor air near the windshield.

On the other hand, when the air outlet mode is other than the foot mode (NO in step 404), the air conditioning air is not blown directly from the air conditioner body to the windshield, so that the indoor air temperature near the windshield is determined in step 410. Detection as room temperature Tic
To set.

After this, or even if the outlet mode is the foot mode and the intake mode is the internal air circulation mode and the compressor is inoperative (NO in step 408), the detected room temperature Tic and the detected room temperature are determined in step 411. The dew point temperature of the room air is obtained from the relative humidity Hic and the moist air diagram outside the figure, and this is set as the dew point temperature Tdp of the room air near the glass. In this case, since the air after passing through the evaporator 12 is the same as the indoor air, and the indoor air is humidified by the occupant himself as a humidity source, the detection room Tic and the detection room relative humidity Hic are separated from each other. By using this, the dew point temperature Tdp is accurately obtained. And
Proceed to step 412.

In step 412, the indoor air temperature Tag near the windshield and the outside air temperature Tamb are calculated by the following equation: Tgin = {1- (Kg / αin)} Tag + (Kg /
αin) Tamb (Kg: heat recirculation rate of the windshield) (αin: heat transfer coefficient of the inner surface of the windshield)
Calculate in. The front windshield inner surface temperature equation is a relational expression of the inside and outside air temperatures of a general windshield: Kg (Tag-Tamb) = αin (Tag-Tgi)
n) (Kg, αin is a constant that is determined by the thickness and material of the windshield).

Subsequently, in step 413, the value of the window fogging degree determination flag Dflg is set by the temperature difference between the front windshield inner surface temperature Tgin and the dew point temperature Tdp of the indoor air near the glass. That is, T
If gin-Tdp <Ta, Dflg = 1, Ta <T
If gin-Tdp <Tb, Dflg = 2, Tgin
If −Tdp> Tb, set Dflg = 3. This is because window fogging generally occurs when the inner surface temperature Tgin of the windshield becomes the dew point temperature Tdp of the indoor air near the windshield.
This is because window fogging is more likely to occur as the temperature difference of −Tdp is smaller. Therefore, the window fogging degree determination flag Df
As the value of lg is smaller, it means that the window fogging is likely to occur. Here, the reference value Ta is a dew condensation critical point at a temperature of about 0 to 1 ° C. The reference value Tb is a temperature of about 5 ° C., which is slightly higher than the reference value Ta. In other words, the indoor environment with the window fogging degree determination flag Dflg = 1 is a state in which the window fogging occurs immediately in the current outlet mode. The indoor environment with the window fogging degree determination flag Dflg = 2 does not immediately cause dew condensation even in the current outlet mode, but if the current outlet mode is continued to some extent, window fog is likely to occur. Further, the indoor environment with the window fogging degree determination flag Dflg = 3 is in a state in which there is no possibility of window fogging even in the current outlet mode.

In short, according to the second embodiment, for example, when the outside temperature is low in winter, the bilevel mode is frequently used by the operation of the occupant, and the boundary is learned by learning the outlet mode map which is one of the control characteristics. When the temperature T ₂ becomes higher than the initial setting and the window fogging easily occurs, first, the driving modes such as the intake mode other than the outlet mode and the operating state of the compressor are examined, and the intake mode is the outside air introduction mode. And the compressor is changed to an operating state to lower the relative humidity of the conditioned air to prevent fogging of the window. And only after these changes, there is still the possibility of window fog,
The outlet mode is changed to a foot mode in which the defroster outlet 24 is opened, or the opening degree of the air mix door 14 is changed to increase the amount of air passing through the heater core 13 to increase the temperature of the conditioned air, Air-conditioned wind with low relative humidity is blown on the windshield. In addition, a delay time is provided when changing the blowout port mode. Moreover, in determining whether or not to change the outlet mode, the occupant's satisfaction with the control characteristic is determined by referring to the maintenance time after the occupant is changed to the current outlet mode characteristic map. .
The delay time for changing the blowout port mode is set longer as the occupant is satisfied with the longer maintenance time and the current blowout port mode control characteristic. Therefore, the automatic control of the air outlet mode is according to the passenger's preference. Therefore, the window fogging prevention performance and the comfort can be made compatible.

In the first and second embodiments, the foot mode is used to avoid the fog on the window.
In the present invention, a blowout port mode other than the foot mode may be selected as long as it is a blowout port mode that opens the defroster blowout port.

As the condition for determining the degree of window fogging, the inference is made as to whether the target blowing temperature Tof is higher than the reference value Ta or the temperature difference between the detected room temperature Tic and the outside air temperature Tamb is higher than the reference value Tb. The window fog may be detected by using a sensor such as a humidity sensor.

Further, although only the outlet mode control has been described as an example, the air volume control or the intake mode control may be used.

[0118]

As described above, according to the first aspect of the present invention, when the occupant manually sets the drive mode of the air conditioner main body, the window fogging degree is calculated from the thermal environment information, and the window fogging degree exceeds the reference value. At this time, the drive control characteristics are corrected according to the degree of window fog, so during automatic control of the air conditioner body,
The drive means is driven based on the corrected drive control characteristic, and window fog can be automatically avoided.

In the second aspect of the present invention, the drive control characteristics are learned during manual control, and the drive control characteristics are corrected only when window fogging is unlikely to occur, so window fogging prevention performance during automatic control is improved.

According to the third aspect of the invention, the surface temperature of the inside of the windshield inside the vehicle is calculated using the calculated air temperature inside the vehicle near the windshield, and in parallel with this,
The dew point temperature of the air near the inside of the windshield vehicle interior is calculated, and the degree of window fogging is calculated according to the temperature difference between the dew point temperature of the air near the inside of the windshield vehicle interior and the surface temperature of the inside of the windshield vehicle interior. So
The accuracy of the window fogging degree is improved. Moreover, since the number of sensors is reduced, the cost can be reduced.

According to the fourth aspect of the invention, the correction width of the drive control characteristic is changed according to the degree of window fog, so the window fog prevention performance during automatic control is improved.

In the fifth aspect of the invention, when the drive control characteristic is corrected, the occupant's degree of satisfaction with respect to the current outlet mode is incorporated, so that the window fogging prevention performance and the comfort at the time of automatic control are compatible. be able to.

[Brief description of drawings]

FIG. 1 is a configuration diagram of the present invention.

FIG. 2 is a configuration diagram showing an entire first embodiment.

FIG. 3 is a flowchart of air conditioning control according to the first embodiment.

FIG. 4 is a flowchart of the outlet mode control of the first embodiment.

FIG. 5 is a flowchart of the outlet mode control of the first embodiment.

FIG. 6 is a flow chart of outlet mode control according to the second embodiment.

FIG. 7 is a flow chart of outlet mode control of the second embodiment.

FIG. 8 is a flowchart for calculating a window fogging degree determination flag value according to the second embodiment.

FIG. 9 is a characteristic diagram showing weights of the second embodiment.

[Explanation of symbols]

 a ... Thermal environment information input means b ... Drive means c ... Drive control means d, 49 ... Manual setting means e ... Window fog degree calculation means f ... Correction means 1 ... Air conditioner main body 2 ... Blower fan 45 ... Auto switch 48 ... Blowout Mouth mode setting device 50 ... Control device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Sasaki 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd.

Claims (5)

[Claims] 1. The air conditioner for the vehicle interior is driven by driving the drive means of the air conditioner body based on the thermal environment information such as the detected room temperature, the outside air temperature, the amount of solar radiation, and the set room temperature input from the thermal environment information detecting means. In a vehicle air conditioner equipped with a drive control means, a manual setting means for setting a drive mode of the drive means by an operation of an occupant, a window fog degree calculation means for calculating a window fog degree based on the thermal environment information, The window fogging degree is compared with a preset reference value by inputting the drive mode from the manual setting means, and when the window fogging degree is equal to or higher than the reference value, an avoidance correction output corresponding to the window fogging degree is output to the drive control means. An air conditioner for an automobile, comprising: 2. The vehicle interior is air-conditioned by driving the drive means of the air conditioner main body based on the thermal environment information inside and outside the vehicle compartment such as detected room temperature, outside air temperature, solar radiation amount, set room temperature, etc. input from the thermal environment information detection means. In a vehicle air conditioner equipped with a drive control means, a manual setting means for setting a drive mode of the drive means by an operation of an occupant, a window fog degree calculation means for calculating a window fog degree based on the thermal environment information, The drive control unit is preset with the drive mode input from the manual setting unit, the target blowout temperature calculated from the thermal environment information inside and outside the vehicle interior, and the window fog degree from the window fog degree calculating unit. Drive control learning correction means for learning and correcting drive control characteristics, and blowing based on the target blowing temperature and the blowing characteristics stored by the drive control learning correction means at all times. When the window fogging degree is equal to or higher than a reference value by a signal from the manual setting means, avoidance different from the drive control characteristic learned and corrected by the drive characteristic learning correction means according to the window fogging degree An air conditioner for an automobile, comprising: a control unit that outputs a correction output to the drive control unit. 3. The dew-point temperature calculating means for calculating the dew-point temperature of the air near the inside of the windshield passenger compartment from the detected room temperature, the relative humidity of the air inside the vehicle compartment, and the air temperature immediately after passing through the evaporator. , Near-window air temperature calculating means for calculating the air temperature near the front window glass from the blowout air temperature and the outlet mode, and the air temperature near the windshield inside the room, outside temperature, front A glass inner surface temperature calculating means for calculating the surface temperature of the front windshield vehicle interior from the heat transfer characteristics of the windshield, and a front window glass vehicle interior surface temperature from the glass inner surface temperature calculating means and the dew point temperature calculating means. Front windshield with the dew point temperature of the air near the vehicle interior Automotive air conditioner according to claim 1 or claim 2, characterized in that a means for calculating a degree fogging window corresponding to degrees difference. 4. The correction means or the control means is provided with means for obtaining a weight according to the degree of window fogging and changing the correction width of the avoidance correction output by the weight. The automobile air conditioner according to Item 2. 5. The correction means or the control means has a drive mode as an outlet mode, a window fog degree is a reference value or more, and a maintenance time equal to or more than a set value for an occupant's satisfaction with the outlet mode is set time or more. At the time of, the means for selecting the outlet mode including the opening of the defroster outlet is provided.
The air conditioning system for automobiles described in.