JPH04163223A - Vehicular air-conditioning control device - Google Patents

Abstract

PURPOSE:To secure appropriate correction of solar radiation at the time of quick heating so as to further improve the comfortable feeling of passengers by correcting the detected quantity of solar radiation to be smaller as the difference between the set temperature and the detected internal air temperature becomes larger, for instance, when the detected internal air temperature is lower than the set temperature. CONSTITUTION:The desired temperature in the vehicle interior is set by a means 1, and the actual temperature in the interior is detected as the internal air temperature by a means 2. At least one of the temperature and flow quantity of air flow blown off to the interior is controlled by a means 3 so as to decrease the difference between the set temperature and the detected internal air temperature. In such an air- conditioning control device, the quantity of solar radiation is detected by a means 4. When the detected internal air temperature is lower than the set temperature, the detected quantity of solar radiation is corrected by a means 5 so as to be made smaller (or larger) as the difference between the set temperature and the detected air temperature becomes larger (or smaller). The correction quantity of solar radiation is further computed by a means 6 so as to moderate the heat receiving quantity of a passenger according to the corrected result.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an air conditioning control device, and particularly to an air conditioning control device suitable for use in a vehicle.

(Prior Art) Conventionally, in a vehicle air conditioning control device, as shown in Japanese Patent Application Laid-open No. 60-128013, for example,
For a predetermined period of time from the start of operation, air conditioning control is performed at a preset amount of solar radiation, and temperature response such as rapid heating is controlled (
Some attempts have been made to improve the comfort of passengers.

(Problem to be Solved by the Invention) However, in such a configuration, as described above, since the amount of solar radiation is fixed to the set value, for example, when the actual amount of solar radiation is larger than the set value, the solar radiation correction is As the amount is insufficient, a problem arises in which the occupants feel hotter due to the actual solar radiation.On the other hand, when the actual solar radiation amount is smaller than the set value, the solar radiation correction amount becomes over-corrected. There is a problem in that the occupants feel cold and feel less comfortable.

Therefore, in order to cope with the above-mentioned problems, the present invention provides an air conditioning control device for a vehicle, by changing the degree of influence of solar radiation according to the temperature environment of the vehicle, so as to perform appropriate solar radiation correction during rapid heating. This is intended to further improve the comfort of the occupants.

Means for Solving the Problem 1) In solving the above problem, the structural features of the present invention are as shown in FIG. An inside temperature detection means 2 that detects the actual temperature inside the vehicle as the inside temperature, and controls at least one of the temperature and the flow rate of the air flow blown into the vehicle interior so as to reduce the difference between the set temperature and the detected inside temperature. Control means 3
an air conditioning control device comprising: a solar radiation amount detection means 4 for detecting the amount of solar radiation; and when the detected internal temperature is lower than the set temperature, the difference between the set temperature and the detected internal temperature is large ( or smaller), the detected solar radiation amount should be made smaller.
The control means 5 is provided with a correction means 5 for correcting the amount of heat received by the occupant (or increasing) and a calculation means 6 for calculating a solar radiation correction amount so as to reduce the amount of heat received by the occupant according to the correction result of the correction means 5. However, the control is performed in consideration of the calculated solar radiation correction amount.

(Function) By configuring the present invention in this way, when the detected internal temperature of the internal temperature detection means 2 is lower than the set temperature of the temperature setting means 1, the correction means 5 adjusts the set temperature and the detected internal temperature. The larger the difference, the smaller the amount of solar radiation detected by the solar radiation amount detection means 4 is corrected, and the smaller the difference between the set temperature and the detected internal temperature, the more the amount of detected solar radiation is corrected to be larger. The calculating means 6 calculates a solar radiation correction amount to reduce the amount of heat received by the occupant according to the correction result of the correcting means 5, and the control means 3 adjusts at least the temperature and flow rate of the air flow blown into the vehicle interior. One of them is controlled so as to reduce the difference between the set temperature and the detected internal temperature, taking into account the calculated solar radiation correction amount.

(Effect) In this manner, during rapid heating, the solar radiation correction amount is calculated in accordance with the above-mentioned correction result for the detected solar radiation amount by the correction means 5 in controlling the control means 3.
This calculated solar radiation correction amount can be obtained as a value that is just the right amount that matches the thermal sensation of the occupant, and as a result, rapid heating control can be realized while always providing a sense of comfort to the occupant.

(Example) Hereinafter, one example of the present invention will be described with reference to the drawings.
The figure 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 installed in the vehicle, and a partition wall 11 is disposed in the downstream part of the air duct 10 so as to divide the inside of the air duct 10 into three equal parts in the axial direction. A ventilation duct 10a and a heat duct tob are defined. In the upstream part of the air duct 10, from upstream to downstream, there is an inside/outside air switching damper 20, a blower 30, and an evaporator 4.
0, flow rate distribution dampers 40A are sequentially arranged. The inside/outside air switching damper 20 is driven by the servo motor 208 and is switched to the first switching position (the position shown by the solid line in FIG. On the other hand, it is switched to the second switching position (the position indicated by the two-dot chain line in FIG. 2), and the inside air in the cabin of the vehicle is allowed to flow into the air duct 10 through the inside air inlet 13.

The blower 30 blows outside air from the outside air introduction port 12 or inside air from the inside air introduction port 12 as an airflow to the evaporator 40 according to the rotational speed of the blower motor M driven by the drive circuit 30a. The evaporator 40 cools the air flow from the blower 30 with a refrigerant that circulates in accordance with the operation of the refrigeration cycle of the air conditioning control device. Flow distribution damper 4
The base end of the damper 0A is rotatably supported by the inner end of the partition wall 15, and the flow rate distribution damper 40A is driven by a servo motor 40a to adjust the flow rate according to the distribution opening degree. The amount of cooling air flowing from the evaporator 40 into the ventilage duct 10a and the heat duct lob is distributed and adjusted.

Moreover, both air mix dampers 50A, 50B and a heater core 60 are arranged in the downstream portion of the air duct 10. The heater core 60 is connected to the partition wall 1 as shown in FIG.
1, and this heater core 60 is divided into three equal parts, each having a heater core part 60a, 60b.
As shown in FIG. Accordingly, the heater core section 60a heats the cooling air flow flowing from the flow rate distribution damper 40A via the air mix damper 50A in accordance with the cooling water from the engine cooling system of the vehicle, and supplies the cooling air flow to the outlet 14 of the penty lane duct 10a. Make it flow towards the target. On the other hand, the heater core section 60B is connected to the flow distribution damper 40 via the air mix damper 50B depending on the cooling water.
A heat duct heats the cooling air flow flowing in from A) lOb
The liquid is caused to flow toward the outlet 15 of.

The air mix damper 50A is driven by the servo motor 50a, and the flow rate distribution damper 40
A part of the cooling airflow from A is made to flow into the heater core portion 0a, and the remaining cooling airflow is made to flow directly to the blow-off port 14. On the other hand, the air mix damper 50B, driven by the servo motor 50b, allows a part of the cooling air flow from the flow distribution damper 40A to flow into the heater core portion 60b according to its opening degree, and the remaining cooling air flow Air outlet 15
Directly flow the direction.

The operation switch SW is operated to generate an operation signal when operating the air conditioning control device. The temperature setting device IQQ is
It is operated to set the temperature inside the vehicle to a desired temperature, and the desired temperature is generated as a set temperature signal. The inside temperature sensor 110 detects the actual temperature inside the vehicle and generates an inside temperature detection signal. The outside temperature sensor 120 detects the actual temperature of the outside air of the vehicle and generates an outside temperature detection signal.

The solar radiation sensor 130 is disposed near the interior of the vehicle at the lower edge of the front windshield of the vehicle, at the left and right center of the upper surface of the dash board. The amount of incident solar radiation is detected and generated as a solar radiation amount detection signal. The blowout temperature sensor 130a detects the temperature of the blowout airflow from the pentillation duct 10a and generates a blowout temperature detection signal. Further, the blowout temperature sensor 1301) detects the temperature of the blowout airflow from the heat duct 1mb and generates a blowout temperature detection signal. The water temperature sensor 130c detects the temperature of the cooling water in the engine cooling system and generates a cooling water temperature detection signal. Further, the outlet temperature sensor 130d detects the temperature of the cooling air flow at the outlet of the evaporator 4o and generates an outlet temperature detection signal.

The A-D converter 140 receives a set temperature signal from the temperature setting device 100, an inside temperature detection signal from the inside temperature sensor 110, an outside temperature detection signal from the outside temperature sensor 120, and a solar radiation sensor 13.
Solar radiation detection signal from 0, each outlet temperature sensor 130 a
, a blowout temperature detection signal from the water temperature sensor 130b, a cooling water temperature detection signal from the water temperature sensor 180c, and an outlet temperature sensor 1.
The outlet temperature detection signal from 30d is digitally converted into first to eighth digital signals. Microphone computer 15
The computer program is executed in cooperation with the A-D converter 140 according to the flowcharts shown in FIGS. 3 to 5, and during this execution, the drive circuit 30a and each servo motor 20a, 40a, 50a , 50b. However, the above-mentioned computer program is
M has been busy writing this in advance. Further, the microcomputer 150 is supplied with power from the batch +7B in response to the closing of the ignition switch IG of the vehicle and enters the operating state, and executes the convenience store program in response to an operation signal from the operation switch SW. Start.

In this embodiment configured as described above, the engine of the vehicle is started based on the closing of the ignition switch IG. Further, when an operation signal is generated from the operation switch SW, the microcomputer 150 starts executing a computer program at step 200 according to the flowchart of FIG. 3, and initializes each internal element at step 210. I do. Next, in step 220, the microcomputer 150 receives the first to eighth digital signals from the A-ray converter 140, and in step 230, the microcomputer 150 determines the standard necessary blowout temperature of the air flow from the air duct 1° into the vehicle interior. Based on the following relational expression (1),
Calculations are performed according to each value of the first to third digital signals (hereinafter referred to as set temperature Tset, inside temperature Tr, and outside temperature Tam).

Tb=Ksei Tset-Kr-Tr-Kam-Ta
+n+ C...(1) However, in relational expression (1), each code K set,
K r and Kam each represent a positive coefficient. Further, the symbol C represents a constant. Note that the relational expression (1) is stored in advance in the ROM of the microcomputer 150.

Then, the microcomputer 150 performs step 24.
0, the standard blowout airflow f of the airflow from the air duct 10 into the vehicle interior is determined in accordance with the standard necessary blowout temperature Tb in step 230 based on the characteristic curve Vb-Tb shown in the same step.
Determine ftVb. However, the characteristic curve Vb-Tb is based on the RO of the microcombinator 150 as data representing the relationship between the standard blowout air flow Mvb and the standard necessary blowout temperature Tb.
It is stored in advance in M.

Next, the microcomputer 150 performs step 25.
0, the standard necessary blowout temperature T of the airflow blown from the ventilage gin duct 10a into the passenger compartment is determined according to the standard necessary blowout temperature Tb based on the characteristic curve Tv-Tb shown in the same step.
At the same time, based on the characteristic curve Tl1-Tb shown in step 250, the standard necessary blowout temperature TH of the airflow blown from the heat duct 10b into the vehicle interior is determined according to the standard necessary blowout temperature Tb. However, if the temperature of the amount of air blown out from the ventilator duct 10a and hitting the upper body of the occupant is too high, the occupant will feel uncomfortable, so the upper limit of Tv in the characteristic curve Tv-Tb is equal to the set temperature T set. . On the other hand, if the temperature of the airflow blowing from the heat duct tab and hitting the lower body of the occupant is too low, the occupant will feel uncomfortable, so the lower limit of TH in the characteristic curve Tl1-Tb is equal to 35 ("C). ,
Each characteristic curve Tv-, Tb and Tl+-Tb is stored in advance in the ROM of the microcomputer 150.

After the arithmetic processing in step 250, the microcomputer 150 calculates the following relational expression (4) in step 260.
The standard required blowout temperature Tv in step 250 based on
Then, in step 282 (see FIG. 5), which will be described later, a corrected blowout temperature Tvl is calculated according to the corrected solar radiation amount S Ta (corresponding to S T).

T vl= T v ten △T(ST) ・--m
However, in relational expression (4), ΔT (ST) represents a function using the amount of solar radiation ST as a variable. This function △T(ST)
functions to correct Tv and set it as Tvl by correcting the temperature of the air flow blown from the ventilage duct 10a to correct the increase in the temperature inside the vehicle interior due to solar radiation and the increase in the thermal sensation of the occupants. In addition, the function △T(ST) is the ventilage engine duct loa that provides a comfortable feeling to the occupants under the low speed mode of the blower 30 in the air conditioning stable state of the air conditioning control device.
The temperature of the airflow blown from the air was experimentally determined by varying the amount of solar radiation ST. In this experimental result, when the amount of correction for Tv is less than ΔT(ST), the amount of decrease in the air outlet temperature is small, giving the occupants a sense of warmth due to solar radiation;
It has been confirmed that when the amount is higher than T), the amount of decrease in the blowout temperature is large, giving a cooling sensation to the occupants. In addition,
The relational expression (4) and the function ΔT(ST) are stored in advance in the ROM of the microcomputer 50.

After that, the microcomputer 150 performs step 27.
0, based on the following relational expression (5), the set temperature TS and each reference required blowing temperature Tb, T are calculated according to the amount of cooling air flow into the ventilage Ron duct 10a and the heat tag when l-. In addition to calculating the air distribution ratio Pr corresponding to the ratio with the amount of cooling air flow into the interior of the cooling air flow 10b, the following relational expression (
6), the amount of air flow v■ from the heat duct 10b is calculated according to the air distribution ratio Pr and the reference air flow rate vb.

VH-Pr-Vb... (6) However, O
When ≦T set - T It < 2, T set
-TH=2, and when 0>Tset-Tel>-2, Tset -T 11--2, and Pr≦0
When P>1, Pr=0, and when P>1, Pr=1. Further, both Kl and 2 represent constants. In addition, Pr
=0 corresponds to pentillation mode, l'r=1
corresponds to heat mode, and 0<Pr<1 corresponds to pie level mode. Also, both relational expressions (5), (6
) is stored in advance in the ROM of the microcomputer 150.

After the calculation processing in step 270, the microcomputer 150 executes the solar radiation correction amount calculation routine 280 (fourth
5)). In this solar radiation correction amount calculation routine 280, in step 281, the microcomputer 150 calculates T se based on the setting 1QTset and the internal temperature Tr in step 220.
It is determined whether or not t>Tr holds true. In such a case, the establishment of TscL>'rr means that the air conditioning control device must be placed in a rapid heating state (warm-up state) to rapidly raise the temperature in the vehicle interior (not only is there a need for heating, but also the solar radiation of the occupants is This also means that it is necessary to blow cold air into the vehicle interior in order to cancel the amount of heat received by This means that both the vehicle interior and the passengers are placed in the maximum cooling state and require cooling, and no correction of the amount of solar radiation is particularly required.

Therefore, if T set > T r holds true,
The microcomputer 150, in step 281,
l"YESJ, and the computer program proceeds to step 282. On the other hand, if T set < Tr holds, the microcomputer 150 determines "NO" in step 281, and the computer program proceeds to step 290. Proceed to.

In step 282, the microcomputer 15
0 is the amount of solar radiation ST in step 220 based on the following relational expression (7), the setting m T 5ets The corrected amount of solar radiation STa is calculated according to the inside temperature Tr and the outside temperature Ta++, and the computer program is advanced to step 290 and 3 Ta
= S T X Map (Tset-Tr,
Tan) - (7> However, in relational expression (7), M a
p (T set −Tr, Tam) is the amount of solar radiation S
It represents a correction coefficient for T, and this correction coefficient M a
p (T set −Tr, T am) is the setting mT
set, the internal temperature Tr, and the external temperature Tam are determined as follows. The present inventors calculated changes in the thermal sensation of the occupant's head due to solar radiation to the occupant's head using heat received from the occupant's head due to solar radiation jlQh as a parameter. Trh), results shown in FIG. 8 were obtained. According to this, if we assume that Tset = 25 ('C) and the air conditioning condition is stable at the nearby temperature Trh = 25 ('C), the thermal sensation of the occupant's head will be equal to the amount of heat received Qh. It can be seen that the temperature shifts to the hotter side as the temperature increases. Here, Qh-10 (Kca I/h) and Q
h=20 (Kc a I/h) is the amount of solar radiation outside the vehicle under typical winter weather conditions 5T=430 (
Kca, l / h - m2) and 5T = 860 (
Kcal/hm2).

The function ΔT(ST) in the above relational expression (4) is determined mainly based on a stable state such as "double series", and according to this function ΔT(ST), the temperature sensation is always insensible. When performing air conditioning, the amount of change in the temperature of the blown air flow and mff1 is determined so as to cancel out the shift in thermal sensation. For example, when heat reception ff1Qh=20 (Kcal/h), the shift from no sensation of warmth to the hot side (+3.5
), air conditioning control is performed to lower the temperature of the blown air flow and increase the flow rate of the blown IB air flow.

However, even if Qh=20 (Kc a l/h), if the near speed T rh=20 (''C), the shift from no sense of warmth to the hot side is approximately +1. 5
It can be seen that this is smaller than when Trh=25 ('C). Therefore, the function ΔT(ST)
is T rh= 25 at T rh= 20 (℃)
If the value is the same as (°C), the air conditioner will not match the sense of temperature and will be overcooled, making the occupants uncomfortable.

Therefore, at Trh=20 ('C), the function ΔT (S
It is necessary to reduce the value of T). For this, Trh
-20 (°C) and Qh = 20 (Kca I/h), T rh = 25 (°C) and Qh = 10
Since the thermal sensation at (Kc a I / h ) is almost the same, it can be seen that T(ST) can be calculated as a function by setting the solar radiation ST to about half the value. As can be inferred from this example, T set −Tr (> 0
) is large, the function ΔT (ST) is
By reducing the correction coefficient of T, the effect of solar radiation is reduced to maintain the occupant's sense of warmth, and also to reduce the Tse
When t-Tr(>O) is small, the function ΔT(ST)
However, it is understood that by increasing the correction coefficient for the amount of solar radiation ST, the influence of solar radiation can be increased to maintain the occupant's sense of warmth.

In addition, the present inventors have determined that changes in the thermal sensation in the occupant's torso are
Using the outside air iMTam as a parameter, an investigation was conducted in relation to the temperature near the occupant's torso (hereinafter referred to as neighborhood temperature Trb), and the results shown in FIG. 9 were obtained. However, it is assumed that at Tam-0 ("C), the occupant is wearing winter clothes, and at Tam=20 (°C), the occupant is wearing spring clothes.

According to FIG. 9, it can be seen that the slope of the change in thermal sensation relative to the nearby temperature Trb is greater when Tam=20 (°C) than when Tam=0 (°C).

The reason for this is that spring clothes are thinner than winter clothes, so they are more susceptible to temperature changes. This means that it is necessary to consider differences in the amount of clothing worn. Therefore, in this embodiment, it is assumed that the amount of clothing varies depending on the outside temperature Tam. That is, when it is assumed that the amount of clothing is large because the outside temperature Tan is low, the correction coefficient for the amount of solar radiation ST is shifted to the smaller side, while the outside air m T
When it is assumed that the amount of clothing is small because am is high, the correction coefficient is shifted to the larger side.

From the above points of view, the correction coefficient Map of the solar radiation ST
(T set -Tr, Tam) was mapped in relation to Tam and (T set -Tr) as shown in FIG. Incidentally, the relational expression (7) and the map shown in FIG. 7 are stored in advance in the ROM of the microcomputer 150. -As mentioned above, the convenience store program can be changed from step 281 or step 282 to step 2.
90 (see FIGS. 4 and 5), the microcomputer 150 calculates the amount of solar radiation S based on the following relational expression (8).
T, pentillation duct loa according to air distribution ratio Pr, standard blowout air flow rate vb, and standard necessary blowout temperature Tv
The necessary blowout temperature Tv2 of the blowout airflow into the vehicle interior is calculated from.

However, Kp represents the product of specific heat Cp and specific gravity γ of air.

Further, α represents 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, relational expression (8) has the following meaning. On the premise that the required blowing temperature Tvl determined in step 260 is the lower limit of the temperature of the blowing air flow from the pentillation duct loa, if the necessary blowing temperature Tv2 is higher than the necessary blowing temperature Tvl, the The amount of heat received is determined by the required blowing temperature Tv2 which is higher than the required blowing temperature Tv1.
It is resolved by On the other hand, when Tv2 is lower than Tvl, since Tvl is the lower limit of the temperature of the airflow blown from the pentillation duct 10a, the temperature of the airflow is set as Tvl, and the amount of heat received by the vehicle due to the remaining solar radiation is calculated. This problem is solved by increasing the flow rate of air blown from the pentillation duct 10a. From the above, in relational expression (8), Tv2 indicates the amount of decrease in the blowout temperature to cancel the amount of heat received due to the solar radiation ST with the blowout air flow rate of (1-Pr)・Vb. I understand. In addition, relational expression (8)
is stored in advance in the ROM of the microcomputer 150.

As shown in FIG.
0 at the step 301, each step 260, 30
Required blowing temperature T at 0 v2. Compare and determine T vl. Therefore, if Tv2≧Tv1, Tvl
Based on the judgment that the amount of heat received by the vehicle due to the amount of solar radiation ST can be canceled out by the following blowing temperature of the air flow from the pentillation duct 10a, the microcomputer 1
50 is determined as l''YESJ in step 301, and the process proceeds to step 302.In step 302, the target necessary blowing temperature T ao of the blowing air flow from the pentillation duct 10a is determined.
v is set to the required blowout temperature Tv2, and the target blowout air flow fi from the pentillation duct loa
Vaov is set to (1-['r)·Vb. Further, the target necessary blowing temperature Tao11 of the blowing air flow from the heat duct 10b is set to the necessary blowing temperature TH (step 250
) and the target air flow fiVa from the heat duct 10b.

11 is the blowing air flow m V 11 in step 270
It is said that it is serious.

On the other hand, if Tv2<Tvl, the microcomputer 150 executes step 260 based on the judgment that the required correction air temperature Tvl in step 260 cannot cancel out the amount of heat received by the vehicle due to the amount of solar radiation ST. 30
If the answer is NO in step 1, the process moves to step 303. Therefore, in this step 303, Taov is set to Tvl, Vaov is calculated according to ST, Tset, and Tvl based on the following relational expression (9), Taall is set to 1, 11, and Vaoll is is set to Vll.

K p (T set −T vl) However, when 0≦T5et−T vl<2, T
set-′rvl=2, O> 1” set-T
When vl>-2, T 5et-T vl--
Set it to 2. Further, in relational expression (9), V aov has a meaning as a flow rate of blown air that can cancel out the amount of heat received by the vehicle due to the amount of solar radiation ST at the Suita temperature of Tvl. Incidentally, the relational expression (9) is pre-arranged in the ROM of the microcomputer 150.

After that, the microcomputer 150 performs step 30.
4, V aov in step 302 or 303
The sum of V aoH and V aoH is the total target airflow into the vehicle interior.
VAa is calculated, and in step 305, the target opening degree (hereinafter referred to as target opening degree S) of the flow rate distribution damper 140A is calculated.
Step 302 or 3 based on the following relational expression (10)
Calculate according to V aov and VaoH in 03.

V aov+ V aoll However, in the relational expression (lO), when S-0, it becomes complete napentilation mode, when 5=177), it becomes complete heat mode, and when 0<S It becomes level mode. Note that the relational expression (10) is stored in advance in the ROM of the microcomputer 150.

When the arithmetic processing in the routine 300 is completed in this way, the microcomputer 150 performs step 3.
10, the total target blowout flow rate VA in step 304
is generated as a blowout flow rate output signal, and in step 320, the target opening degree S in step 305 is generated as an air distribution ratio output signal.

Next, in the target opening processing routine 330, the microcomputer 150 determines the target opening of the air mix damper 50A (hereinafter referred to as target opening SWI) using the following relational expression (
11), the target required outlet temperature TaOV in step 302 or 303, the value of the seventh digital signal (hereinafter referred to as cooling water 4TV) and the value of the eighth digital signal (hereinafter referred to as outlet temperature Te) in step 220. Initial calculation is performed according to , and the result of this calculation is
PrD control calculation is performed by feedback of the value of the fifth digital signal (hereinafter referred to as pentillation duct blowout temperature) in step 220.

Note that the PID control calculation as described above is effective for highly responsive and highly accurate control of the temperature of the air flow blown from the pentillation duct 10a. Further, the relational expression (11) is stored in advance in the ROM of the microcomputer 150 (7).

Therefore, the microcomputer 150 performs step 3.
At step 40, the target opening degree SWI in routine 330 is generated as a first opening degree output signal, and the target opening degree SWI in routine 330 is generated as the first opening degree output signal.
In step 50, the target opening degree (hereinafter referred to as target opening degree SW2) of the air mix damper 50B in the pentillion mode or heat mode is set to the target necessary blowing temperature g in step 302 or 303 based on the following relational expression (12).
T aol+, cooling water temperature Tw in step 220
and the outlet temperature Te, and the result of this calculation is used as the value of the sixth digital signal in step 220 (
The PID control calculation is performed by feedback of the heat duct blowout temperature (hereinafter referred to as heat duct blowout temperature).

T - Te Next, the microcomputer 150 performs step 36.
0, the target opening SW2 in the routine 350 is generated as the second opening output signal, and the routine moves to execution of the inside/outside air mode switching control routine 370. Note that the PID control calculation as described above is effective for highly responsive and highly accurate control of the temperature of the air flow blown from the heat duct lOb. Moreover, the relational expression (12) is expressed as R of the microcomputer 150.
It is stored in OM in advance.

Therefore, when the microcomputer 150 generates the blowout flow rate output signal, the air distribution ratio output signal, the first opening degree output signal, and the second opening degree output signal as described above, the switching mode of the inside/outside air switching damper 20 is also changed. Then, the blower 30 is driven by the drive circuit 30a using its motor M in response to the blowout flow rate output signal from the microcomputer 150, and introduces inside air or outside air as an airflow into the air duct 10 and into the evaporator 40. Blow air. Then, the flow distribution damper 4
0A is driven by the servo motor 40p in response to the air distribution ratio output signal from the microcomputer 150 so that the opening degree matches the target opening degree S. Further, the air mix damper 50A is driven by the servo motor 50a in response to the first opening output signal from the microcomputer 150 so that its opening matches the target opening SW1, and the air mix damper 50B is driven by the servo motor 50a in response to the first opening output signal from the microcomputer 150. , is driven by the servo motor 50b in response to the second opening output signal from the microcomputer 150 so that the opening matches the target opening SW2.

In such a case, the determination in step 281 is [YESJ
In this case, the corrected solar radiation fi S T a obtained in step 282 is set as ST, and step 260
function ΔT(ST) and correction required blowout temperature Tvl
and Tv2 in step 290 or T aov and V aov in step 303 are determined based on this Tvl, so VA and S become S
It is determined in consideration of Ta. Therefore, the flow rate and temperature of the airflow blown from the pentillation duct 10a are controlled according to the map shown in FIG. 7 so as to match the thermal sensation of the occupant. This means that a rapid heating effect can be smoothly achieved while always providing a sense of comfort to the occupants, depending on the correct amount of solar radiation correction that matches the occupant's sense of warmth.

In addition, in the above embodiment, the correction coefficient Map(T s
eL -Tr, T am) has been described as a map as shown in FIG.
Mend) may be determined based on the following relational expression (13).

Amend=1-Ka(Tset-Tr)-Kb(T
am-TalIy...(13) However, in this relational expression (13), Ka, Kb
represents a constant. Tam represents the lfQ outside temperature when Tset-Tr>0. Therefore, by using the relational expression (13), the solar radiation correction amount during rapid heating can be continuously determined, so that even more precise control is possible.

Further, in the embodiment, the correction coefficient Map(T 5
et-T r, T am) as T set, T r
Although we have described an example in which the amount of clothing is estimated based on the outside temperature Tan, the amount of clothing can be directly detected, or the amount of clothing can be directly detected by the crew member By inputting it indirectly, (T s
et, T r) and the amount of clothing, the amount of solar radiation S
The correction coefficients for T may be mapped in substantially the same manner as in FIG. Generally, the amount of clothing is c
+ o (7+) Taking advantage of the fact that it is expressed using (black value), when the outside temperature is low, reduce the amount of clothing by 1.0 × cl.
o, and when the outside temperature is medium, the amount of clothing should be 0.8X c
Lo, and when the outside temperature is high, wear clothes and reduce the amount to 0°5.
It may also be mapped as X elo.

Further, in the embodiment described above, each of the air mix dampers 50A and 50B is provided in each of the pentillation duct 10a and the heat duct 10b, but
Alternatively, by integrating the air mix damper into one, the temperature and flow rate of the air flow blown from the pentillation mode outlet can be controlled by using a cold air bypass mechanism. It may be controlled independently. In such a case, the amount of bypass of the cold air bypass mechanism is controlled in advance in proportion to the amount of solar radiation, so during rapid heating, the amount of bypass can be corrected using the correction coefficient of solar radiation, as in the above embodiment. It becomes possible.

[Brief explanation of drawings]

FIG. 1 is a diagram corresponding to the description of the claims, FIG. 2 is a block diagram showing an embodiment of the present invention, FIGS. 3 to 6 are flow charts showing the operation of the microcomputer shown in FIG. 2, and FIG. The figure is a map of the correction coefficient for solar radiation ff1ST.
FIG. 8 is a graph showing the relationship between the thermal sensation and the nearby temperature Trh using heat reception 11Qh as a parameter, and FIG.
It is a graph showing the relationship between the thermal sensation and the nearby temperature Trb using Tam as a parameter. Explanation of symbols 30... Blower, 40... Evaporator, 50
A, 50B...Air mix damper, 60...Heater core, 100...Temperature setting device, 11O...Interior temperature sensor, 130...Solar radiation sensor, 150...Microcomputer.

Claims (1)

[Claims] temperature setting means for setting a desired temperature inside the vehicle interior; interior temperature detection means for detecting the actual temperature inside the vehicle interior as the interior temperature; An air conditioning control device comprising: a control means for controlling to reduce a difference between a set temperature and the detected internal temperature; a correction means that corrects the detected solar radiation amount to be smaller (or larger) as the difference between the set temperature and the detected internal temperature becomes larger (or smaller) when the temperature is lower; a calculation means for calculating a solar radiation correction amount so as to reduce the amount of heat received by the vehicle, and the control means performs the control also taking into consideration the calculated solar radiation correction amount. air conditioning control equipment.