JP3028579B2 - Air conditioning controller for vehicles - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air conditioner, and more particularly to an air conditioner suitable for use in a vehicle.

(Prior Art) Conventionally, in a vehicle air conditioning control device, for example,
As disclosed in JP-A-59-34915, the amount of change in the amount of solar radiation exceeds a predetermined set value for the purpose of properly maintaining the occupant's warmth even when the amount of solar radiation changes suddenly. In such a case, the air conditioning control is performed to gradually change the output of the solar radiation sensor to obtain a target temperature in the vehicle compartment. Further, as disclosed in JP-A-62-258808, when adjusting the temperature of the vehicle interior to the target temperature, when there is solar radiation, a correction value corresponding to the solar radiation is increased at a predetermined gradient. In some cases, the air conditioning control is performed by controlling the air conditioning control in such a way that the correction value is reduced at a predetermined gradient with a delay when the solar radiation stops.

(Problems to be Solved by the Invention) However, in these configurations, in the air-conditioning control, the incident direction and altitude of solar radiation to the occupant, that is,
It does not take into account the situation of solar radiation incident on each part of the occupant's face, chest, legs, etc., and as a result, it is difficult to perform air conditioning control that accurately matches each sensation of each part of the occupant Met. As described above, as disclosed in JP-A-63-170115 or JP-A-1-145219, air-conditioning control is delayed by a delay time that changes in accordance with the amount of change in the amount of solar radiation. It is the same even if it is performed.

Therefore, the present invention, in order to deal with the above,
In the vehicle air-conditioning control device, when adjusting the temperature in the passenger compartment toward the set temperature, it is attempted to take into consideration the conditions of incidence of solar radiation to each part of the occupant's body.

(Means for Solving the Problems) In order to solve the problems, the constitutional feature of the present invention is, as shown in FIG. 1, a temperature setting means 1 for setting a desired temperature in a vehicle cabin, and a vehicle. An internal air temperature detecting means 2 for detecting an actual indoor temperature as an internal air temperature, and controlling at least one of a temperature and a flow rate of an airflow blown into the vehicle cabin so as to reduce a difference between the set temperature and the detected internal air temperature. In the air-conditioning control device provided with the control means 3, the detection means 4 which is disposed at an appropriate position of the vehicle and detects the amount of solar radiation from the solar light source and the elevation angle with respect to the solar light source is provided.
The solar radiation correcting means 3a for changing at least one of the temperature and the flow rate of the blown air flow in accordance with the detected solar radiation amount, and the control by the solar radiation correcting means 3a is more controlled by the controller 3 as the detected elevation angle increases. A change means 3b for changing the magnitude of the delay in accordance with the detected elevation angle so as to delay.

(Operation and Effect) By configuring the present invention as described above, the detecting means 4
Detects the amount of solar radiation from the solar light source and the elevation angle with respect to the solar light source, the solar radiation correcting means 3a of the control means 3 changes at least one of the temperature and the flow rate of the blown air flow according to the detected solar radiation. In such a case, the changing unit 3b changes the magnitude of the delay according to the detected elevation angle so that the control by the control unit 3 is greatly delayed as the detected elevation angle increases. For this reason, it can be estimated that the greater the elevation angle, the greater the rate at which the sunlight shines on the legs with low sensitivity, and the degree of delay can be increased. Therefore, fine air conditioning can be realized that matches the solar radiation sensitivity of each body part of the occupant.

(Example) Hereinafter, a first example of the present invention will be described with reference to the drawings.
FIG. 2 shows an example of a vehicle air-conditioning control device according to the present invention. This air-conditioning control device has an air duct 10 mounted on the vehicle, and inside the air duct 10, from the upstream to the downstream, an inside / outside air switching damper 2 is provided.
0, blower 30, evaporator 40, air mix damper 5
0, a heater core 60 and each of the outlet switching dampers 70 to 90 are provided. The inside / outside air switching damper 20 is a servo motor 20A
Is switched to the first switching position (the position shown by a solid line in FIG. 2) under the drive by the outside air, and outside air flows into the air duct 10 from the inlet 11 thereof, while the second switching position (FIG. 2) At the position indicated by the two-dot chain line in the drawing), and the inside air in the vehicle compartment of the vehicle flows into the air duct 10 through the inlet 11.

The blower 30 blows the outside air or the inside air from the inlet 11 to the evaporator 40 as an air flow according to the rotation speed of the blower motor M driven by the drive circuit 30a. The evaporator 40 cools the airflow from the blower 30 with the refrigerant circulating according to the operation of the refrigeration cycle of the air conditioning controller.
The air mix damper 50 is driven by the servo motor 50a, and according to its opening, allows the cooling air flow from the evaporator 40 to flow into the heater core 60, and transfers the remaining cooling air flow to each of the outlet switching dampers 70 to 90. Directly flow toward. The heater core 60 heats the inflowing cooling airflow according to the cooling water from the engine cooling system of the vehicle and causes the cooling airflow to flow toward the outlet switching dampers 70 to 90. The air outlet switching damper 70 is driven by the servomotor 70a and is opened in the ventilation mode of the air conditioning control device to blow airflow from the air outlet 12 of the air duct 10 toward the center of the vehicle compartment of the vehicle. The air outlet switching damper 80 is opened during the heat mode of the air conditioning controller under the driving of the servomotor 80a, and blows out an air flow from the air outlet 13 of the air duct 10 toward the lower part of the vehicle interior. Further, the outlet switching damper 90 is driven by a servomotor 90a,
The air conditioner is opened in the defroster mode of the air conditioning control device, and blows airflow from the outlet 14 of the air duct 10 toward the front windshield W (see FIG. 3) of the vehicle.

The operation switch SW is operated when the air conditioning control device is operated to generate an operation signal. The temperature setting device 100 is operated when the temperature in the vehicle interior is set to a desired temperature, and generates the desired temperature as a set temperature signal. Internal temperature sensor 11
A value of 0 detects the actual temperature in the vehicle compartment and is generated as an internal air temperature detection signal. The outside air temperature sensor 120 detects the actual temperature of the outside air of the vehicle and generates it as an outside air temperature detection signal. As shown in FIG. 3, the solar radiation sensor 130 is disposed in the center of the upper surface of the dashboard D near the lower left and right central portions of the front windshield W and near the vehicle interior. , As shown in FIG. 4 and FIG.
It comprises a base 131 and light receiving elements 132 to 134 each having a rectangular cross section. The base 131 is fixed to the center of the upper surface of the dashboard D at the lower surface 131a on the left and right sides of the dashboard D. The light receiving element 132 is attached to the horizontal upper surface 131b of the base 131. The light receiving element 132 has, for example, a built-in phototransistor. The light receiving element 132 receives the solar light incident through the front windshield W by the phototransistor through the horizontal light receiving surface 132a. I do.

Further, the remaining light receiving elements 133 and 134 have the same configuration as the light receiving element 132.
As shown in FIG. 4 and FIG. 5, they are stuck on left and right inclined surfaces 131c and 131d of the base 131, respectively. However, each of the light receiving elements 133 and 134 is positioned in the forward direction of the vehicle (FIGS. 3 to 5).
In the figure, the horizontal direction (corresponding to the illustrated x-axis direction),
(Corresponding to the axial direction). In such cases,
As shown in FIG. 4, each of the light receiving elements 133 and 134 is oriented left and right by a predetermined azimuth angle φs with respect to the x-axis. Each of the light receiving elements 133 and 134 is inclined upward (corresponding to the z-axis direction) by a predetermined inclination angle θs with respect to the x-axis direction. Thus, each of the light receiving elements 133 and 134 receives the solar light similarly to the light receiving element 132.

In the solar radiation sensor 130 thus configured, the third
As shown in the figure, when the solar light passes through the front windshield W at the elevation angle θ and the azimuth angle φ of the solar sensor 130 from the position of the point Sun and enters the solar sensor 130 with the solar radiation amount ST, each light received by the solar sensor 130 is detected. Element 132,133,134 is each solar radiation
Received as Ia, Ib, Ic, respectively, and each solar radiation Ia, I
b, Ic are generated as first, second and third solar radiation detection signals. The water temperature sensor 130a detects a cooling water temperature of an engine cooling system of the vehicle and generates a water temperature detection signal. Further, the outlet temperature sensor 130b detects the temperature of the cooling airflow at the outlet of the evaporator 40 and generates the detected temperature as an outlet temperature detection signal.
The A / D converter 140 has a set temperature signal from the temperature setter 100,
Inside air temperature detection signal from inside air temperature sensor 110, outside air temperature sensor 1
Outside temperature detection signal from 20 and the first from solar radiation sensor 130
The third to third solar radiation detection signals, the water temperature detection signal from the water temperature sensor 130a, and the exit temperature detection signal from the exit temperature sensor 130b are digitally converted into first to eighth digital signals, respectively.

The microcomputer 150 executes the computer program according to the flowcharts shown in FIGS.
-Executed in cooperation with the D converter 140, and during this execution, the drive circuit 30a and each servomotor 20a, 50a, 70a, 80
The arithmetic processing necessary for the drive control of a and 90a is performed. However, the above-mentioned computer program is a microcomputer 15
0 is stored in advance in the ROM. In addition, the microcomputer 150 is supplied with power from the battery B in response to the closing of the ignition switch IG of the vehicle to be activated, and starts executing the computer program in response to the operation signal from the operation switch SW.

In the first embodiment thus configured, the engine of the vehicle is started based on the closing of the ignition switch IG. When an operation signal is generated from the operation switch SW, the microcomputer 150 starts executing the computer program in step 200 according to the flowchart of FIG. 6, and in step 210,
The respective internal elements are initialized. Then, the microcomputer 150 receives the first to eighth digital signals from the A / D converter 140 in step 220, and in step 230, the reference required blowing temperature Tb of the air flow from the air duct 10 to the vehicle interior. Is calculated based on the following relational expression (1) according to each value of the first to third digital signals (hereinafter, referred to as set temperature Tset, internal temperature Tr, and external temperature Tam).

Tb = Kset · Tset−Kr · Tr−Kam · Tam + C (1) where, in the relational expression (1), each code Kset, Kr and Kam
Represents a positive coefficient, respectively. Symbol C represents a constant. The relational expression (1) is a microcomputer
It is stored in 150 ROMs in advance.

Next, the microcomputer 150 performs a step 240 based on the characteristic curve Vb-Tb shown in the step.
The reference blow air flow rate Vb of the air flow from the air duct 10 to the vehicle interior is determined according to the reference required blow temperature Tb in 230.
However, the characteristic curve Vb-Tb is stored in advance in the ROM of the microcomputer 150 as data representing the relationship between the reference blowout air flow rate Vb and the reference required blowout temperature Tb.

Thereafter, when the computer program proceeds to the insolation correction routine 250 (see FIG. 6 and FIG. 7), the microcomputer 150 determines in step 251 based on the following relational expression (2): The elevation angle θ is calculated according to each value of the fourth to sixth digital signals (that is, each of the solar radiation amounts Ia, Ib, Ic), and in step 251a, the following relational expression (2a) is obtained.
The solar radiation amount ST is calculated in accordance with the solar radiation amount Ia and the elevation angle θ based on the following formula (2b). In step 251b, the solar radiation amount ST, the reference required blowing temperature Tb in step 230, and the reference in step 240 are calculated based on the following relational expression (2b). The correction required blowing temperature Ta is calculated according to the blowing air flow rate Vb.

However, the relational expression (2) is obtained as follows. Generally, in the solar radiation sensor 130, each of the solar radiation amounts Ib, Ic
Are the various quantities ST, φ, θ, φs, θs shown in FIGS.
The relations are expressed by the following relational expressions (2c) and (2d).

_{Ib = ST · {cosθ s sinθ} + sinθ s cosθcos (φ -φs)} ··· (2c) Ic = ST · {cosθ s sinθ + sinθ s cosθcos (φ + φs)} ··· (2d) where, θs = φs = When 45 ゜, each relational expression (2
c) and (2d) are arranged as the following relational expressions (2e) and (2f), respectively.

The amount of solar radiation Ia is expressed by the following relational expression (2g) in relation to the elevation angle θ
Is obtained as

Ia = ST · sin θ (2g) By solving each of the relational expressions (2e), (2f), and (2g) with respect to θ, the relational expression (2) is obtained. The relational expression (2a) is obtained from the relational expression (2g). The relational expression (2
b) corrects the reference required blowing temperature Tb according to the amount of solar radiation ST in consideration of an increase in the thermal load of the vehicle due to the amount of solar radiation ST. However, in the relational expression (2b), the symbol Ks represents a positive coefficient, the symbol Cp represents the specific heat of air, and γ represents the specific gravity of air. In addition, each relational expression (2),
(2a) and (2b) are stored in the ROM of the microcomputer 150 in advance.

If the required blowing temperature Ta in step 251b is lower than the predetermined lower-limit blowing temperature Tas (for example, 5 ° C.) stored in the ROM of the microcomputer 150 in advance, the microcomputer 150 determines “NO” in step 252. "
In the next step 253, the target required outlet temperature Tao from the air duct 10 into the vehicle interior is reduced to the lower limit outlet temperature Tas.
, And based on the following relational expression (3), the set temperature Ts in step 220, the lower limit blowout temperature Tas,
Then, the target air flow rate Vao from the air duct 10 into the vehicle compartment is calculated according to the solar radiation amount ST.

This relational expression (3) is expressed as (Tas−Ta) in Tao = Tas.
Is corrected by the air flow rate. However, the relational expression (3) is stored in the ROM of the microcomputer 150 in advance. on the other hand,
When Ta ≧ Tas holds, the microcomputer 150
Determines "YES" in the step 252, and proceeds to the next step 254
In step 251, the required blowing temperature Tao is set equal to the correction required blowing temperature Ta in step 251, and the target blowing air flow rate Vao is set to the reference blowing air flow rate Vb in step 240.
Set equal to

When the calculation process of the solar radiation amount correction routine 250 is completed in this way, the microcomputer 150 shifts to execution of a delay time and change time calculation routine 260 (see FIGS. 5 and 8). And this arithmetic routine
At 260, the microcomputer 150 proceeds to step 26.
In step 1, the amount of change in solar radiation △ ST is calculated. However, when calculating the amount of change in solar radiation △ ST, the microcomputer 150
Repeatedly samples the fourth to sixth digital signals from the A / D converter 140 by executing a timer interrupt control program (not shown) at regular intervals, and at time t = ti
The sampling solar radiation STi at (i = 1, 2,...) Is sequentially calculated based on the relational expressions (2) and (2a) in the same manner as described above, and is temporarily stored. The microcomputer 150 calculates the difference between the sampled solar radiation amount STi and the preceding sampled solar radiation amount STi−1 as the solar radiation change amount △ ST = STi.
Calculate as -STi-1.

If the absolute value of the solar radiation change amount | △ ST | is smaller than the reference solar radiation amount change width 量 STb stored in advance in the ROM of the microcomputer 150, the microcomputer 150 determines “NO” in step 262. I do. On the other hand, | △ ST | ≧ △
If STb is satisfied, the microcomputer 150 determines “YES” in step 262. Then, the microcomputer 150 determines in step 263 the following relational expression (4).
Based on the respective solar radiation amounts Ib and Ic at step 220, the elevation angle θ at step 251 and the solar radiation amount S at step 251a.
The azimuth angle φ (see FIG. 3) is calculated according to T.

However, this relational expression (4) is equivalent to the above-mentioned relational expressions (2e),
It is obtained by solving (2f) and (2g) for φ.
Note that the relational expression (4) is expressed in the ROM of the microcomputer 150.
Is stored in advance.

Thereafter, the microcomputer 150 determines in step 264 a map τd−θ− that represents the relationship between the delay time τd, the elevation angle θ, and the azimuth angle φ for delaying the start of temperature control of the blown air flow by the evaporator 50. Based on φ (see FIG. 10), the delay time τd is changed to a predetermined delay time τ in accordance with the elevation angle θ in step 251 and the azimuth angle φ in step 263.
df, τdm, or τds.

However, the map τd-θ-φ is created based on the following grounds. When the present inventors suddenly increase the amount of solar radiation entering the occupant, the outside air temperature Tam = 20 ° C.
In the experiment, how the reported values of the thermal sensation of the occupant's head, trunk, and legs changed with time, the results shown in Fig. 9 were obtained. Was done. In FIG. 9, the broken line A indicates a rapid increase in the amount of solar radiation, the solid line B indicates the reported warmth value of the occupant's head, and the two-dot chain line C indicates the reported warmth value of the occupant's torso. The dashed line D indicates the reported warmth value of the occupant's leg. According to this, it is understood that the tendency of the passenger's warm feeling report value to increase in time becomes slower in the order of the head, the torso, and the legs, and differs for each of the head, the torso, and the legs. However, the warmth report value is
A larger number indicates that the occupant feels hotter.

Therefore, the angle ranges of −90 ° ≦ φ ≦ −30 ° and 0 ° ≦ θ ≦ 30 ° and the angle ranges of −90 ° ≦ φ ≦ −60 ° and 30 ° ≦ φ ≦ 60 ° Since solar radiation easily hits the head of the driver in the seat, it is necessary to shorten the delay time τd to speed up the air conditioning control. In addition, an angle range of −60 ° ≦ φ ≦ 90 ° and 60 ° ≦ θ ≦ 90 ° and 60 ° ≦ φ ≦ 90 ° and 30 ° ≦
In the angle region of θ ≦ 60 °, the solar radiation is likely to hit the legs of the driver who is insensitive to the solar radiation. Therefore, the delay time τd may be increased to delay the air conditioning control. Further, in the angle regions other than the above-described angle regions, the solar radiation easily hits the legs of the driver, so that the delay time τd may be set to an intermediate length. For this reason, the delay times τds, τdm, and τdf are determined so that τds>τdm> τdf, and are employed in correspondence with the above-described angle regions as shown in FIG. Note that the map τd-θ-
φ is stored in the ROM of the microcomputer 150 in advance.

When the delay time τd is determined in step 264 in this manner, the microcomputer 150 determines in step 265 the change time τc for changing the tendency of increasing or decreasing the air flow rate from the blower 30 with time. ,
Map τc−θ− representing the relationship between elevation angle θ and azimuth angle φ
Based on φ (see FIG. 11), change time τ according to elevation angle θ in step 251 and azimuth φ in step 263
c is determined to be one of the predetermined change times τcf, τcm, τcs.

However, the map τc−θ−φ is the same as the map τd−
It is created on the same basis as the basis for creating θ-φ. Therefore, each change time τcs, τcm, τcf is defined as τcs> τcm
> Τcf so as to correspond to each τds, τdm, τdf, and, as shown in FIG. 11, in the same manner as in the case where τds, τdm, τdf are used corresponding to each angular region in FIG. Therefore, it was adopted corresponding to each angle region. Note that the map τc-θ-φ corresponds to the microcomputer 150
Is stored in advance in the ROM.

Calculation routine for delay time and change time as described above
After the execution of 260, the microcomputer 150 advances the computer program to the opening degree control routine 270, the air flow rate control routine 280, the blowing mode control routine 290a, and the inside / outside air mode control routine 290b. However, when the arithmetic processing in step 264 is performed as described above, when the determined delay time τd after the arithmetic processing has elapsed, the air-mix damper 50 in the opening control routine 270 is not used.
The arithmetic processing corresponding to the control for increasing / decreasing the opening degree is started, and the arithmetic processing corresponding to the control for increasing / decreasing the blown air flow of the blower 30 in the air flow rate control routine 280 is started based on the determined change time τc in step 265.

That is, when the determined delay time τd elapses as described above,
The microcomputer 150 uses the opening control routine 270 to execute step 253 or 254 based on the following relational expression (5).
, The respective required values of the seventh and eighth digital signals in step 220 (hereinafter, the cooling water temperature Tw)
And the outlet temperature Te), and calculates the target opening of the air-mix damper 50 (hereinafter referred to as target opening SWo), and the servo motor 50 matches the opening of the air-mix damper 50 with the target opening SWo. The air-mix damper 50 is driven so as to cause the same.

However, each relational expression (5) is the R of the microcomputer 150.
It is stored in the OM in advance.

Also, when the determination delay time τd elapses as described above,
The microcomputer 150 is an air flow control routine 2
At 80, the target outlet air flow rate at step 253 or 254
The difference ΔVao between two consecutive values of Vao is divided by the determined change time τc in step 265 to generate a change amount (ΔVao / τc) per unit time of the target air flow rate Vao as a flow rate output signal. Based on the flow output signal, the blower motor M drives the blower 30 in cooperation with the drive circuit 30a so that the air flow from the blower 30 gradually matches the target blown air flow Vao. Thus, under the execution of the opening degree control routine 270 and the air flow rate control routine 280 as described above, the blowout mode control routine 290a and the inside / outside air mode control routine 290b are executed, and each of the air outlet switching dampers 12-14.
The air flow is related to its temperature and flow rate under the selective opening by cooperation with each of the servo motors 70a to 90a and the selective switching position by cooperation of the inside and outside air switching damper 20 with the servo motor 20a. It is controlled and blows out into the cabin. As a result, air conditioning in the vehicle interior that matches the driver's warmth under a solar radiation amount change exceeding the reference solar radiation amount change width 日 STb is realized.

As described above, in the first embodiment, the solar radiation sensor 130 is employed, and the light receiving elements 13 of the solar radiation sensor 130 are used.
The delay time τd and the change time τc are determined by the azimuth φ and the elevation angle θ determined based on the received light amount of 2,133,134, and the maps of FIGS. 10 and 11, and after the determination of the delay time τd, The opening degree control routine 270 and the air flow rate control routine 280 necessary to match the temperature and flow rate of the blown air flow into the vehicle cabin with the target required blow temperature Tao and the target blow air flow rate Vao in step 253 or 254 at the time of passage, respectively. The arithmetic processing is started, and the air flow control routine 280 performs the arithmetic processing for generating the flow output signal corresponding to the change time τc as described above.

Therefore, as shown in FIG. 12, after the elapse of τd = τdf when the amount of incidence on the driver's head changes suddenly, the blower is controlled under the opening control of the air-mix damper 50 to the target opening SWo. The control for increasing the flow rate to the target air flow rate Vao of 30 is performed along the solid line E in FIG. 12 in the course of τc = τcf. Further, after the elapse of τd = τdm when the amount of incident solar radiation to the driver's torso changes suddenly, the blower 3 is controlled under the opening control of the air-mix damper 50 to the target opening SWo.
Flow control for increasing the target air flow rate Vao to 0 is τc = τcm
Is performed along the two-dot chain line F in FIG.
After the elapse of τd = τds when the amount of incident solar radiation on the driver's leg suddenly changes, the target blown air flow rate of the blower 30 is controlled under the opening control of the air-mix damper 50 to the target opening SWo. The flow rate increase control to Vao is performed along the alternate long and short dash line G in FIG. 12 in the course of τc = τcs.

As described above, when the amount of incident solar radiation to the driver's head, torso, or legs suddenly changes, the delay time τd and the change time τc, which are determined to be longer in the order of the head, torso, and legs, are assumed. The opening control of the air mix damper 50 and the flow control of the blower 30 as described above are performed in the order of the head, the torso, and the legs,
The operation is started later, and the flow rate control of the blower 30 as described above is performed more gradually in the order of the head, the torso, and the legs. Therefore, it is possible to realize air conditioning that individually and precisely matches the warmth of the driver's head, torso, or legs.

In the first embodiment, the example in which the delay time τd and the change time τc are determined without considering the fluctuation of the outside temperature Tam has been described. However, the delay time τd and the change time The time τc may be determined such that the time τc is determined in consideration of the change in the outside temperature Tam. In the case where the amount of solar radiation incident on the occupant suddenly changes under the outside temperature Tam = 0 (° C.), the present inventors have determined that each of the occupant's head, trunk, and legs Experiments confirmed how the reported warmth value changes over time, and the results shown in FIG. 13 were obtained.
In FIG. 13, a dashed line A1 indicates a rapid increase in the amount of solar radiation, a solid line B1 indicates a reported warmth value of the occupant's head, and a two-dot chain line.
C1 indicates the passenger's body warmth report value, and the dash-dot line D1
Indicates the warmth report value of the occupant's leg. According to this, since the outside air temperature Tam is significantly lower than in the case of FIG. 9, the occupant's torso and leg portions increase in the amount of clothing, so that the change in the occupant's warm feeling report value becomes slower and the delay is almost complete. It turns out that it becomes. Therefore, when the outside temperature Tam is low, τdm,
The correction is performed so that τds, τcm, and τcs are each increased by Δτ. However, Δτ is set to be longer as the outside temperature Tam decreases.

Further, in the first embodiment, the delay time τd and the change time τc are determined based on the respective maps in FIGS. 10 and 11, but instead the delay time τd and the change time τc is defined by the characteristic lines La and L shown in FIG.
The determination may be made based on b and Lc or the characteristic lines Ld, Le and Lf shown in FIG. However, both characteristic lines La, Ld
Determines the relationship between [tau] d or [tau] c and [phi] with [theta] = 60 [deg.]-90 [deg.] As a parameter. Further, both characteristic lines Ld and Le are represented by θ = 3
The relationship between φ and φ with 0 ° to 60 ° as a parameter is specified. Further, both characteristic lines Lc and Lf are represented by θ = 0 ° to 30 °.
The relationship between τd or τc with φ as a parameter and φ is specified. Note that θ does not change as much as φ, and has three angle ranges (0 ° to 30 °, 30 ° to 60 °) in relation to the season and time.
{60,90 ゜ 90 ゜) is sufficient. The characteristic lines La, Lb and Lc or Ld, Le and Lf are stored in advance in the ROM of the microcomputer 150 as data.

In the first embodiment, the delay time τd and the change time τc are set to the same value for both the rapid increase and decrease in the amount of solar radiation, respectively. Alternatively, the delay time τd and the change time τc at the time of the rapid decrease in the amount of solar radiation may be set to be somewhat longer than the delay time τd and the change time τc at the time of the rapid increase of the solar radiation. Good.

Next, a second embodiment of the present invention will be described with reference to FIG. 16. In the second embodiment, instead of the air conditioning controller described in the first embodiment, FIG. The configuration of the air conditioning control device shown in FIG. Thus, in the second embodiment, instead of the air duct 10 described in the first embodiment,
An air duct 10A is employed, and in the downstream portion of the air duct 10A, a partition wall 15 is disposed so as to bisect the interior of the air duct 10A in the axial direction, and forms a ventilation duct 10a and a heat duct 10b. .

In the upstream portion of the air duct 10A, from the upstream to the downstream, the inside / outside air switching damper 20 described in the first embodiment,
A blower 30 and an evaporator 40 are sequentially provided. The inside / outside air switching damper 20 allows outside air (or inside air) to flow into the air duct 10A from the inlet 16 at the first (or second) switching position. The flow distribution damper 40A is rotatably supported at the base end thereof at the inner end of the partition wall 15. The flow distribution damper 40A is driven by a servomotor 40a to open and close the distribution damper 40A. Depending on the degree, the distribution amount of each cooling air flow from the evaporator 40 into the ventilation duct 10a and the heat duct 10b is adjusted.

As shown in FIG. 16, the heater core 60 described in the first embodiment is fitted to an intermediate portion of the partition wall 15. The heater core 60 is divided into two equal parts,
Projections 60a and 60b protrude into the ventilation duct 10a and the heat duct 10b, respectively. Thus, the heater core section 60a heats the cooling airflow flowing from the flow distribution damper 40A via the air mix damper 50A and causes the cooling air flow to flow toward the outlet 17 of the ventilation duct 10A.
On the other hand, the heater core section 60b heats the cooling air flow flowing from the flow distribution damper 40A via the air mix damper 50B and causes the cooling air flow to flow toward the outlet 18 of the heat duct 10b.

The air mix damper 50A flows a part of the cooling air flow from the flow distribution damper 40A into the heater core portion 60a in accordance with the opening degree under the drive by the servo motor 50a described in the first embodiment. And let the remaining cooling air flow
Flow directly to 7. On the other hand, air mix damper 50B
According to the opening degree, a part of the cooling air flow from the flow distribution damper 40a flows into the heater core 60b according to the opening degree, and the remaining cooling air flow is directed to the outlet 18 under the drive by the servo motor 50b. Flow directly.

Outlet temperature sensor 130c is ventilated duct 10a
The temperature of the blown air flow from the air is detected and generated as a blown air temperature detection signal. The outlet temperature sensor 130d is a heat duct
The temperature of the blown air flow from 10b is detected and generated as a blown temperature detection signal. The A / D converter 140A includes the temperature setting device 100.
, The internal temperature detection signal from the internal temperature sensor 110, the external temperature detection signal from the external temperature sensor 120, the first to third solar radiation amount detection signals from the solar radiation sensor 130, and the water temperature from the water temperature sensor 130a. The detection signal, the outlet temperature detection signal from the outlet temperature sensor 130b, and each outlet temperature detection signal from each outlet temperature sensor 130c, 130d are digitally converted into first to eighth digital signals.

The microcomputer 150A stores a computer program (hereinafter, referred to as a second computer program)
In accordance with the flow charts shown in FIGS. 17 to 19, the processing is executed in cooperation with the A / D converter 140A. During this execution, the driving circuit 30a and the driving control of the servomotors 20a, 40a, 50a, 50b are necessary. Perform arithmetic processing. However, the above-described second computer program is stored in the ROM of the microcomputer 150A in advance. Other configurations are substantially the same as those of the first embodiment.

In the second embodiment configured as described above, similarly to the first embodiment, when the microcomputer 150A starts executing the second computer program in step 300 according to the flowchart of FIG. In step 310, the computer 150A performs an initialization process, and in step 320, outputs the first to first data from the AD converter 140A.
Upon receipt of the eighth digital signal, in steps 330 and 340, the reference required blowing temperature Tb and the reference blowing air flow rate Vb of the air flow from the air duct 10A into the vehicle interior are described in the same manner as in steps 230 and 240 of the first embodiment. Is calculated. However,
The relational expression (1) and the characteristic curve Vb-Tb in the first embodiment.
Is stored in the ROM of the microcomputer 150A in advance.

Then, the microcomputer 150A executes step 350
At the same time, based on the characteristic curve Tv-Tb shown in the same step, the reference required blowing temperature Tv of the airflow blown from the ventilation duct 10a into the passenger compartment is determined according to the reference required blowing temperature Tb, and the characteristic curve shown in Step 350 Based on TH-Tb, the reference required blowing temperature TH of the airflow blown from the heat duct 10b into the vehicle compartment is determined according to the reference required blowing temperature Tb. However, if the temperature of the air volume blown from the ventilation duct 10a and hitting the upper body of the occupant is too high, the occupant may feel uncomfortable, so the upper limit value of Tv in the characteristic curve Tv-Tb is equal to the set temperature Tset. Meanwhile, heat duct 10b
If the temperature of the airflow impinging on the lower body of the occupant is too low, the occupant may feel uncomfortable. Therefore, the lower limit value of TH in the characteristic curve TH-Tb is set to 35 (° C.). The characteristic curves Tv-Tb and TH-Tb are stored in the ROM of the microcomputer 150A in advance.

After the arithmetic processing in step 350, the microcomputer 150A calculates in step 360 the correction required blowing temperature Tv1 according to the reference required blowing temperature Tv in step 350 based on the following relational expression (6).

Tv1 = Tv + △ T (ST) (6) where, in the relational expression (4), △ T (ST) is the amount of solar radiation.
Represents a function with St as a variable. The function ΔT (ST) serves to correct Tv to Tv1 by eliminating the rise in temperature in the vehicle interior due to the solar radiation and the rise in thermal sensation of the occupant by the temperature of the airflow blown out from the ventilation duct 10a. . Further, the function ΔT (ST) changes the temperature of the airflow blown out from the ventilation duct 10a that gives the occupant a sense of comfort under the low-speed mode of the blower 30 in the air conditioning control device in the stable state of the air conditioning, and changes the insolation ST. It was obtained experimentally. In this experimental result, if the correction amount for Tv is smaller than ΔT (ST), the amount of decrease in the blowout temperature is small, so that the occupant is given warmth due to solar radiation,
It has been confirmed that when the correction amount for Tv is larger than ΔT (ST), the occupant gives a sense of coolness due to a large amount of decrease in the blowout temperature. Note that the relational expression (6) and the function △ T
(ST) is stored in the ROM of the microcomputer 150A in advance.

After that, the microcomputer 150A executes step 370.
In accordance with the following relational expression (7), the amount of the cooling air flow into the ventilation duct 10a and the heat duct 1 in the state of ST = 0 according to the set temperature Ts and the respective reference required blowing temperatures Tb and TH at ST = 0.
0b, and calculates the air distribution ratio Pr corresponding to the ratio of the amount of cooling air flowing into the heat duct 10b, and calculates the air distribution ratio Pr and the reference blow air flow rate Vb from the heat duct 10b based on the following relational expression (8). The amount VH of the blown air flow is calculated.

VH = Pr · Vb (8) However, when 0 ≦ Tset−TH <2, Tset−TH = 2
When 0>Tset−TH> −2, Tset−TH = −
2, Pr = 0 when Pr ≦ 0, and Pr = 1 when P> 1. K1 and K2 both represent constants. Note that Pr = 0 corresponds to the ventilation mode, Pr = 1 corresponds to the heat mode, and 0 <Pr <1 corresponds to the bi-level mode. In addition, both relational expressions (7),
(8) is stored in the ROM of the microcomputer 150A in advance.

Then, the microcomputer 150A executes step 38
At 0, based on the following relational expression (9), the solar radiation amount ST and the air distribution ratio P
The required blowing temperature Tv2 of the blowing airflow from the ventilation duct 10a into the vehicle compartment is calculated according to r, the reference blowing air flow rate Vb and the reference required blowing temperature Tv.

Here, Kp represents the product of the specific heat Cp of air and the specific gravity γ. Α is a constant determined according to the volume of the air-conditioned space of the vehicle, the area of the window glass, the preference of the occupant, and the like.

Here, the relational expression (9) has the following significance. Assuming that the required blowing temperature Tv1 determined in step 360 is the lower limit of the temperature of the airflow blown from the ventilation duct 10a, the required blowing temperature Tv2 is set to the required blowing temperature T.
If it is higher than v1, the amount of heat received by the solar radiation of the vehicle is eliminated by the required blowing temperature Tv2 which is equal to or higher than the required blowing temperature Tv1. On the other hand, when Tv2 is lower than Tv1, since Tv1 is the lower limit of the temperature of the airflow blown from the ventilation duct 10a, the temperature of the blown airflow is Tv1, and the amount of heat received by the vehicle due to the remaining solar radiation is Venty. The problem is solved by increasing the flow rate of the air blown out from the ventilation duct 10a. From the above, in relational expression (9), Tv2 is (1−Pr) · Vb
It can be seen that the blowout air flow rate indicates a decrease in blowout temperature for canceling the amount of heat received by the insolation ST. In addition,
The relational expression (9) is stored in the ROM of the microcomputer 150A in advance.

As shown in FIGS. 18 and 19, the second computer program proceeds to each target value calculation routine 390 for the temperature and flow rate of the required blown air flow and the air distribution ratio. Each step 380,3
The required blowing temperatures Tv2 and Tv1 at 60 are compared and determined. Therefore, if Tv2 ≧ Tv1, the solar radiation amount ST is calculated based on the blowing temperature of the airflow from the ventilation duct 10a of Tv1 or less.
Microcomputer 150A determines in step 391 that "YE
S ”is determined, and the processing shifts to the arithmetic processing in step 392. Thus, in this step 392, the target required blowing temperature Taov of the blowing airflow from the ventilation duct 10a is set to the required blowing temperature Tv2,
Target outlet air flow rate V from ventilation duct 10a
aov is set to (1-Pr) Vb. Furthermore, the target required air temperature TaoH of the airflow blown from the heat duct 10b is set to the required airflow temperature TH (see step 350), and the target blown air flow rate VaoH from the heat duct 10b is set.
Is set to the blowing air flow rate VH in step 370.

On the other hand, if Tv2 <Tv1, based on the determination that the amount of heat received by the vehicle due to the amount of solar radiation ST cannot be canceled with the correction required blowing temperature Tv1 in step 360,
The microcomputer 150A determines “NO” in the step 391, and shifts to execution in the step 393. Then, in this step 393, Taov is set to Tv1, Vaov is calculated according to ST, Ts and Tv1 based on the following relational expression (10), TaoH is set to TH, and VaoH is set to VH.
Is set.

However, when 0 ≦ Tset−Tv1 <2, Tset−Tv1 = 2
When 0>Tset−Tv1> −2, Tset−Tv1 = −
Let it be 2. In relational expression (10), Vaov is Tv1
It has a meaning as a blown air flow rate that can cancel the amount of heat received by the vehicle due to the solar radiation ST in the state of the blowout temperature. Note that the relational expression (10) is stored in the ROM of the microcomputer 150A in advance.

After that, the microcomputer 150A executes step 394.
In step 392 or 393, the sum of Vaov and VaoH is calculated as the total target blown air flow rate VA into the vehicle interior, and in step 395, the target opening degree of the flow distribution damper 140A (hereinafter, referred to as
The target opening S is calculated according to Vaov and VaoH in step 392 or 393 based on the following relational expression (11).

However, in the relational expression (11), when S = 0, a complete ventilation mode is set, when S = 1, a complete heat mode is set, and when 0 <S <1, a bilevel mode is set. . Note that the relational expression (11) is stored in the ROM of the microcomputer 150A in advance.

When the calculation processing in the routine 390 is completed in this way, the microcomputer 150A advances the second computer program to the delay time and change time calculation routine 260 described in the first embodiment, and proceeds as described above in accordance with the flowchart of FIG. Similarly, the delay time τd and the change time τc are determined. After that, the microcomputer 150A
In step 400, the total target outlet flow rate VA in step 394 is generated as an outlet flow rate output signal, and in step 410
In step 395, the target opening S is generated as an air distribution ratio output signal. The maps in FIGS. 10 and 11 are stored in the ROM of the microcomputer 150A in advance.

Then, the microcomputer 150A uses the target opening processing routine 420 to set the target opening of the air-mix damper 50A (hereinafter referred to as the target opening SW1) in step 392 or 393 according to the following relational expression (12). Outlet temperature Tao
v, initially calculate according to the cooling water temperature Tw and the outlet temperature Te in step 320, and
Feedback of the value of the fifth digital signal (hereinafter referred to as ventilation duct outlet temperature) at
Perform PID control calculation.

The PID control calculation as described above is effective for high-accuracy control with good responsiveness of the temperature of the airflow blown from the ventilation duct 10a. The relational expression (12) is stored in the ROM of the microcomputer 150A in advance.

Then, the microcomputer 150A
At 0, the target opening SW1 in the routine 420 is generated as a first opening output signal. In the target opening routine 440, the target opening of the air-mix damper 50B in the bi-level mode or the heat mode (hereinafter, the target opening) SW2)
Is initially calculated based on the following relational expression (13) according to the target required blow-off temperature TaoH in step 392 or 393, the cooling water temperature Tw and the outlet temperature Te in step 320, and the calculation result is expressed by the sixth PID control calculation is performed by feedback of a digital signal value (hereinafter referred to as a heat duct blowout temperature).

Then, the microcomputer 150A executes step 450
, The target opening degree SW2 in the routine 440 is generated as a second opening degree output signal. The PID control calculation as described above is effective for high-accuracy control with good responsiveness of the temperature of the airflow blown from the heat duct 10b. In addition, the relational expression (1
3) is stored in the ROM of the microcomputer 150A in advance.

As in the first embodiment, the operation routine 26
When the arithmetic processing in step 264 of 0 is performed,
When the determined delay time τd after the calculation processing has elapsed, the calculation processing for the increase or decrease control of both or one of the opening degrees of both or one of the two target opening processing routines 420 and 440 and one of the two air mix dampers 50A and 50B is started, And an arithmetic process for increasing / decreasing the value of the blown air flow rate signal in step 400 based on the determined change time τc in step 265 and step 41
A calculation process for increasing / decreasing the value of the air distribution ratio output signal at 0 is started.

That is, when the determined delay time τd elapses as described above,
The microcomputer 150A controls both the temperatures of the ventilating duct 10a and the temperature of each of the blown air flows from the heat duct 10b so as to maintain the actual temperature in the cabin at the set temperature Tset in one or both of the target opening processing routines 420 and 440. Alternatively, the arithmetic processing is performed so that one of them gradually approaches both or one of the target required blow-off temperatures Taov and TaoH in step 392 or 393. For this reason, both or one of the two servo motors 50a, 50b matches the opening of both or one of the two air mix dampers 50A, 50B with the opening corresponding to both or one of the two target required blowing temperatures Taov, TaoH. Then, both or one of both air mix dampers 50A and 50B is driven so as to cause the air mix dampers 50A and 50B to rotate.

Also, when the determination delay time τd elapses as described above,
The microcomputer 150A divides the difference △ VA between the two connected values of the total discharge flow rate VA in step 394 in step 400 by the determined change time τc in step 265,
Let ΔVA / τc be the value of the total output flow rate output signal and the total output flow rate V
The arithmetic processing is performed so as to gradually approach A, and the arithmetic processing is performed so that the value of the air distribution ratio output signal in step 410 gradually approaches the target opening degree S in step 395.
Therefore, the blower motor M drives the blower 30 in cooperation with the drive circuit 30a such that the air flow rate from the blower 30 matches the total blowout flow rate VA.

As described above, in the second embodiment, the delay time τd and the change time τc are determined in the same manner as in the first embodiment, and after the delay time τd is determined, the vehicle enters the vehicle interior when the delay time τd elapses. The opening control routine 420 required to match the temperature and flow rate of the blown air flow to the target required blow temperature and target required air flow in step 392 or 393, respectively.
Then, each arithmetic processing in step 400 is started, and in step 400, arithmetic processing for generating a flow rate output signal corresponding to the change time τc is performed.

Therefore, also in the second embodiment, similarly to the first embodiment, when the amount of incident solar radiation to the driver's head, torso, or leg suddenly changes, the head, torso, and legs are sequentially arranged. Assuming the long determined delay time τd and change time τc, the opening control of the air mix dampers 50A and 50B and the flow control of the blower 30 as described above are performed in the order of head, trunk, and legs, The operation is started later, and the flow rate control of the blower 30 as described above is performed more gradually in the order of the head, the torso, and the legs. Therefore, it is possible to realize air conditioning that individually and precisely matches the warmth of the driver's head, torso, or legs.

[Brief description of the drawings]

1 is a diagram corresponding to the description of the claims, FIG. 2 is a block diagram showing a first embodiment of the present invention, FIG. 3 is a layout diagram of the solar radiation sensor of FIG. 2 with respect to a vehicle, FIG. Is a plan view of the solar radiation sensor, FIG. 5 is a right side view of the same, and FIGS.
FIG. 9 is a flowchart showing the operation of the microcomputer shown in FIG. 2, FIG. 9 is a graph showing the temporal change of the passenger's warm feeling report value, and FIG. 10 is a graph showing the relationship among the delay time τd, the azimuth angle φ and the elevation angle θ. FIG. 11 is a map showing a relationship between a change time τc, an azimuth angle φ and an elevation angle θ, and FIG. 12 is a graph showing a temporal change state in a relationship between a delay time and a change time of an air flow rate from a blower. , FIG. 13 is a graph showing the temporal change of the passenger's warm feeling report value, FIG. 14 is a characteristic diagram showing the relationship between the delay time or the change time and the azimuth with the elevation angle as a parameter, and FIG. 15 is the same characteristic. FIG. 16 is a characteristic diagram showing a modification of the diagram, FIG. 16 is a block diagram showing a second embodiment of the present invention, and FIGS. 17 to 19 are flowcharts showing the operation of the microcomputer shown in FIG. EXPLANATION OF SYMBOLS 30 Blower, 40 Evaporator, 50, 50A, 50B Airmix damper, 60 Heater core, 100 Temperature setting device, 110 Internal temperature sensor, 130 Solar radiation sensor, 150 ,
150A ... a microcomputer.

Claims (1)

(57) [Claims] 1. A temperature setting means for setting a desired temperature in a vehicle interior of a vehicle, an internal air temperature detecting means for detecting an actual temperature in the vehicle interior as an internal air temperature, and a temperature and a flow rate of an air flow blown into the vehicle interior. Control means for controlling at least one of the two so as to reduce the difference between the set temperature and the detected internal temperature, wherein the amount of insolation from the insolation light source, Detecting means for detecting an elevation angle with respect to the light source, wherein the control means changes at least one of the temperature and the flow rate of the blown air flow according to the detected amount of solar radiation, and control by the solar radiation correcting means. Changing means for changing the magnitude of the delay in accordance with the detected elevation angle so that the control by the control means is delayed more as the detected elevation angle becomes larger. The air conditioning control device that.