JPH0478610A - Blower control device of air conditioning control device for car - Google Patents

Abstract

PURPOSE:To improve air conditioning feeling at the time of deflected insolation by correcting airflow amount of right and left blowers computed on the basis of a signal from a thermal load computing means and airflow amount computed on the basis of insolation amount in accordance with an insolation bearing and setting each airflow amount of the right and left blowers independently in accordance with the deflected insolation bearing. CONSTITUTION:Blowers 5a, 5b and heat addition means 10, 18a, 18b are arranged from the upstream side in air conditioning ducts 4a, 4b of two systems blowing air conditioning air in correspondence with the right and left of a car. In the above device, an insolation amount is detected by a means 202 and an insolation amount for control is computed by a means 203 from each of the detected insolation amounts, and an insolation bearing is computed by a means 206. Additionally, an integrated signal is computed by a means 204 by way of adding at least the aforementioned amount for control to a thermal load detected by a means 201. Furthermore, an airflow amount of the blowers is computed by a means 205 in accordance with the integrated signal. Thereafter, the airflow amount of the two blowers is respectively corrected by a means 208 in accordance with insolation bearing and it is output to right and left blower drive means 58a, 58b.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is an air conditioner having two left and right air conditioning ducts and a blower in each air conditioning duct, in which the air volume of the blower fan is controlled depending on the direction and altitude of solar radiation. The present invention relates to a blower control device.

(Prior Art) Conventionally, an air conditioner for a vehicle having left and right morale means has an inside/outside air switching door that switches between an inside air inlet 102 and an outside air inlet 103 on the most upstream side of an air conditioning duct 101, as shown in FIG. 104, and this internal/external air switching door 10
The outside air or inside air selected by No. 4 is sent into the air conditioning duct 101 by the blower 105. The introduced air is cooled by the evaporator 106 and divided into air that passes through the heater core 107 and is warmed, and air that bypasses the heater core 107 by an air mix door 108. The warmed air that has passed through the heater core 107 and the bypassed air that remains cooled are mixed in the air mix chamber 109 to become air whose temperature is controlled to a predetermined temperature, and the air is heated to a predetermined temperature, and the differential air outlet 110 and the foot air outlet 111, mode door 113 from vent outlet 112
114.115, it will be blown out into the passenger compartment 116. In particular, when a solar radiation sensor (not shown) detects a deviation in solar radiation, the air blown out from the vent door is transferred to the vent duct 11 by the left and right wind distribution doors 117.
The air amount ratio blown out from the right air outlet 119 and the left air outlet 120 of No. 8 is changed and blown into the vehicle interior.

As a control device for this left and right public morals,
No. 4576 discloses a device that blows more air in the direction of sunlight and reduces the temperature difference inside the vehicle by installing a plurality of temperature sensors. A device is disclosed that detects the balance of solar radiation in each part and determines the balance between left and right wind roses.

(Problem to be Solved by the Invention) However, in the above-mentioned public morals means, since the left and right public morals are performed at the left and right air distribution doors 117, when the air volume of one is increased, the air volume of the other is decreased accordingly. This means that in order to secure the air volume of one, the air volume of the other is sacrificed, and it is difficult to ensure the minimum air volume of the other.

In addition, if an increase in air volume or a decrease in air volume is required due to the conditions of the heat load detection means, etc., the air volume on both the left and right sides will increase or decrease at the same time, so it is difficult to set the target air volume. This cannot be said to be the execution of fine-grained control to achieve high comfort requirements.

Therefore, an object of the present invention is to provide a device that improves the air conditioning feeling during polarized solar radiation by independently setting the air volume of each blower provided on the left and right depending on the polarized solar radiation direction.

(Means for Solving the Problem) As shown in FIG. 1, the first invention provides two systems of air conditioning ducts 4a and 4b that blow out conditioned air corresponding to the left and right sides of the vehicle. , these air conditioning ducts 4a, 4b
Inside, from the upstream side, blowers 5a, 5b, heat adding means 10
．． In a vehicle air conditioning control device equipped with L8a and 18b, a heat load detection means 201 that detects heat load from at least the vehicle interior temperature, outside air temperature, and set temperature, and a plurality of solar radiation sensors are arranged at predetermined positions to measure the amount of solar radiation. a solar radiation amount detecting means 202 for detecting the solar radiation amount, a solar radiation amount calculating means 203 for calculating the solar radiation amount for control from each solar radiation amount detected by the solar radiation amount detecting means 202; A solar radiation direction calculation means 206 that calculates a solar radiation direction from the solar radiation amount, and a comprehensive signal that calculates a total signal by adding at least the solar radiation amount for control from the solar radiation amount calculation means 203 to the heat load from the thermal load detection means 201. A calculation means 204, an airflow amount calculation means 205 which calculates the airflow rate of the blower based on the total signal from the comprehensive signal calculation means 204, and an airflow amount calculation means 205 that calculates the airflow amount from the solar radiation direction obtained from the solar radiation direction calculation means 206. The air blowing amount correcting means 208 corrects the obtained air blowing amounts of the two blowers and outputs them to the left and right floor drive means 58a and 58b.

Furthermore, as shown in FIG. 2, the second invention includes two air conditioning ducts 4a that blow out conditioned air corresponding to the left and right sides of the vehicle.
, 4b are provided, and blowers 5a, 5b, heat adding means 10.18a,
18b, a heat load detection means 201 that detects heat load from at least the vehicle interior temperature, outside air temperature, and set temperature, and a plurality of solar radiation sensors are arranged at predetermined positions to detect the amount of solar radiation. solar radiation detection means 202
and a solar radiation amount calculating means 203 that calculates a solar radiation amount for control from each solar radiation amount detected by the solar radiation amount detecting means 202;
A solar radiation direction calculation means 206 that calculates a solar radiation direction from each solar radiation amount detected by the solar radiation amount detection means 203, and a solar radiation altitude calculation means that calculates a solar radiation altitude from each solar radiation amount detected by the solar radiation amount detection means 202. 207, a total signal calculation means 204 that calculates a total signal by adding at least the solar radiation amount for control from the solar radiation amount calculation means 203 to the heat load from the heat load detection means 201;
04, and the solar radiation direction calculation means 206.
Based on the solar radiation direction obtained from the solar radiation direction obtained from the solar radiation altitude calculation means 207 and the solar radiation altitude obtained from the solar radiation altitude calculation means 207, the ventilation! Arithmetic means 20
The air blowing amount correcting means 208 corrects the air blowing amounts of the two blowers obtained in step 5, respectively, and outputs the corrected air blowing amounts to the left and right blower driving means 58a and 58b.

(Function) Therefore, in this invention, the air flow amount of the left and right blowers calculated based on the signal from the heat load calculation means is
The above-mentioned problem can be achieved by correcting the amount of air flow calculated based on the amount of solar radiation based on the direction of solar radiation, or in addition to this, based on the altitude of solar radiation.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 3, to explain the first invention, an air conditioner 1 for a vehicle is partitioned at the center by a partition plate 3,
Air conditioning ducts) 4a and 4b are installed in parallel.

Upstream of the air conditioning ducts 4a, 4b, blowers 5a, 5b made of sirocco fans, etc. are provided, and further upstream of the blowers 5a, 5b are internal air inlets 6a, 6b and outside air inlets a, 7b.
Inside and outside air switching doors 8a and 8b are arranged to switch between the inside and outside air, and the air selected by the inside and outside air switching doors 8a and 3b is supplied to the motor 9a.

Air is sent into the air conditioning ducts 4a and 4b by the blowers 5a and 5b connected to the air conditioning ducts 4a and 4b. An evaporator 10 that constitutes a part of a common cooling cycle, which will be described below, is disposed with a partition plate 3 interposed between the air-conditioning ducts 4a and 4b in an integrated rear portion.

The cooling cycle includes a compressor 11 and a condenser 1.
2, accumulator 13, expansion valve 14
The evaporator 10 is arranged in series in order, and the heat of the air passing through the evaporator 1° is absorbed through the refrigerant moving in the cooling cycle, and the heat is released through the condenser 12. It cools the air passing through it.

This cooling cycle is operated by being connected to the engine 16 via an electromagnetic clutch 15 provided in the compressor nozzle 11, and an electromagnetic valve 17 for controlling the internal pressure of the compressor.
By controlling the amount of refrigerant compressed, the cooling level can be adjusted.

Air conditioning duct 4a on the downstream side of evaporator 10.

4b is provided with heater cores 18a and 18b, and the heater cores 18a and 18b are provided with pipes 1 drawn out to the outside
A heat medium is supplied through pipes 9a and 19b, and the flow rate of this heat medium is controlled by hot water flow control valves 20a and 20a provided in pipes 19a and 19b, respectively.
20b. By adjusting the temperature of the heater cores 18a, 18b according to the amount of the heating medium, the air that has passed through the evaporator 10 and has been cooled is warmed to a desired temperature.

Furthermore, bypass passages 21a and 21b are formed above the heater cores 1'8a and 18b between them and the air conditioning duct 2,
The air that has passed through the evaporator IO is heated to the heater core 18a,
18b or the respective air temperature ducts) 4a through the bypass passages 21a, 21b.

A mix chamber 22a is formed on the rearmost stream side of 4b.

22b.

The amount of air passing through the bypass passages 21a and 21b is controlled by a bypass door 23a provided for each air passage.

23b.

Each of the mix chambers 22a and 22b has an air conditioning duct l.
- Defrost outlet 24 formed on the top surface of 4a and 4b
Upper air outlet 25a, 2 formed at the upper front of a, 24b
5b and foot outlet 26a formed below both sides,
26b are provided respectively, and the defrost outlet 2
4a, 24b have differential doors 26a, 26b and an upper air outlet 25a.

25b has vent doors 27a and 27b, and foot air outlet 2.
6a, 26b are provided with foot doors 28a, 28b supported by air conditioning ducts 4a, 4b, respectively.

Therefore, when the blowers 5a and 5b rotate, the vehicle interior air or the vehicle exterior air selected by the interior and exterior air switching doors 8a and 8b are sucked separately, and then pass through the air conditioning ducts 4a and 4b without being mixed (evaporator 10 and heater core 18a
, 18b, the temperature is controlled by passing through the mix chamber 22a.
, 22b depending on the mode.
4b.

Air passing through the right side via 25a, 25b, 26a, and 26b is blown into the vehicle interior 29 from the right side, and air passing through the left side is blown into the vehicle interior 29 from the left side.

Further, the air passing through the bypass passages 21a and 21b when the bypass doors 23a and 23b are opened directly cools the upper portion of the vehicle interior 29 that is blown out from the upper outlet.

In order to control the air conditioner 1, a microcomputer 30 is provided, and the microcomputer 30 includes a central processing unit (CPU), a read only memory (ROM), and a random access memory (RA
M) is a well-known device having input/output ports (Ilo), etc., and processes and calculates signals from the operation panel 31 and each sensor signal input via the multiplexer (MPX) 32 and A/D converter 33. Control is executed by outputting control signals.

The operation panel 31 includes an AUTO switch 34 for setting all of the air conditioner 1 to the auto state, an A/C switch 35 for driving the compressor 11 of the cooling cycle, and an INTA switch for switching between inside and outside air to switch the introduced air to inside air or outside air.
KE switch 36, DEF switch 7 switch 37 to set the blowout mode to defrost mode, MODE switch 38 to set blowout modes other than defrost, rotation speed of right, side and left side pro fan motors 9a, 9b in 4 stages. FAN switch 39a/39b
, Asop-down switch to set the temperature on the right and left sides, /
It is formed from channels 40a, 40b, and a display section 41. The display section 41 includes set temperature display sections 42a and 42b that display the set temperature by operating the left and right temperature setting amplifier down switches 40a and 40b, and the rotation speed of the left and right pro fan motors 9a and 9b. Medium speed,
A display slope 43a that is displayed in four stages: medium high speed and high speed;
43b, a blowout mode display 45 in which the blowout mode is expressed by arrows 44a and 44b, an A/C display 46 that lights up when the A/C switch 35 is turned on, and an inside air circulation button that lights up when the inside air circulation mode is selected by the INTAKE switch 36. It is composed of a mode display 47.

The multiplexer (MPX) 32 includes left and right solar radiation sensors 48a and 48b formed by at least two left and right photosensors (not shown), a vehicle interior temperature sensor 49 that detects the temperature inside the vehicle, and an outside air temperature detection sensor that detects the temperature outside the vehicle. 50, an evaporator downstream temperature detection sensor 51 that detects the temperature on the downstream side of the evaporator 10, a right side heater outlet temperature detection sensor 52 that detects the hot water temperature of the right heater core;
and a left heater outlet temperature detection sensor 53 that detects the left heater core outlet temperature, a potentiometer 54 that detects the position of the mode door, and internal/external air switching doors 7a, 7b.
Each signal from the potentiometer 55 that detects the position of is inputted, which is sequentially arranged and output to the A/D converter 33, where it is converted into a digital signal.
The data is input to the microcomputer 30 as data.

The left and right solar radiation sensors 48a, 48b are arranged in parallel on the instrument panel of the vehicle, as shown in FIG.

This microcomputer 30 controls the suction solenoid valve 17 of the compressor 11 via a suction solenoid valve drive circuit 56 and controls the electromagnetic clutch 15 via an electromagnetic clutch drive circuit 57. Further, the blower motors 9a and 9b are connected to a blower drive circuit 58a.

Actuator 59a that opens and closes the inside and outside air switching doors 8a and 8b, and the bypass doors 23a and 2
Actuators 59b and 59c that open and close the mode doors 26, 27.
It is controlled via 60f.

In FIG. 5, blower control executed by the microcomputer 30 is shown as a flowchart, and the control operation will be explained below according to this flowchart.

At step 300, a flowchart for blower control is started. This interrupt routine
It can be executed by a jump instruction inserted at appropriate intervals into the main routine to be executed periodically, or by a timer that interrupts the main routine at predetermined intervals during execution of the main routine. You can also run it.

In step 310, the set temperature T is used as a heat load signal.
d, vehicle outside temperature Ta, vehicle interior temperature Tr, right side solar radiation TAR
1. The left side solar radiation amount Ts, the temperature Te on the downstream side of the evaporator, and the mode position signal are input.

In step 320, the right side solar radiation amount TSR and the left side solar radiation amount TSL input in step 310 are determined to be the sixth
Calculated according to the flowchart shown in the figure, solar radiation direction θ
seek. In step 321, the right solar radiation amount TSR
The magnitude of the left side solar radiation amount TSL is determined. If this results in strong solar radiation on the right side, proceed to step 322 and perform the following (
1) Calculate the right side solar radiation determination amount TtlR using the formula.

Then, the left side solar radiation determination amount TDL is calculated.

TDL=K+(TSL T!IR)/
TSL...(2) Right side solar radiation determination amount TDR and left side solar radiation determination amount TD calculated by this formula (1) or (2)
By applying L to the graph in step 324, the solar radiation direction θ can be determined. As a result, in step 325, the solar radiation azimuth calculation routine is ended, and the process returns to the original routine.

In step 330, a solar radiation calculation routine is executed. In the solar radiation amount calculation routine shown in FIG. 7, in step 331, the solar radiation amount Ts for control is determined using the following equation (3).

To*= K + (TSRTSL)/TSN ・
・11) Tss=CT□+T st) / Kz
... (3) Note that K1 is an arithmetic constant.

Also, if the left side solar radiation is strong according to step 321,
Proceed to step 323, and apply step 3 to equation (2) below.
32, the right solar radiation amount TslI and the left solar radiation amount TSL
If the right side solar radiation amount T is large, in step 333, the solar radiation amount T
55 and the right solar radiation amounts T and R, and if the solar radiation amount Tss is large, the solar radiation amount Ts for control is used as the solar radiation amount,
If the amount of solar radiation T, . If the left side solar radiation amount TSL is large in step 332, the process proceeds to step 335, where the solar radiation amount T'ss is compared with the left side solar radiation amount TSL, and if the solar radiation amount Tss is large, the control solar radiation amount Ts and solar radiation I T s s
If is small, in step 336, the control solar radiation ITS is set to the left solar radiation amount TsL. As shown in the graph of FIG. 8, between α and α, (T
SR + T st) / Kz is the solar radiation amount Ts for controlling
If the solar radiation is biased to the right side, the right solar radiation TSR is set, and if it is biased to the left, the left solar radiation TSR is set.
This indicates that 3L is used as the solar radiation amount Ts for control. This completes the calculation of the solar radiation amount Ts for control,
In step 337, the original routine is returned. Note that this α is approximately 30°, and α'' is approximately -30''. Therefore, the solar radiation between α and α′ is taken from the front, and 40° on the left and right sides.
The target range for polarized solar radiation control is between 7° and 7°.

In step 340, a total signal T for controlling the air conditioner 1 is calculated according to (4) 2 below.

T=ATr +BTa +CTe +DTsETd+F
(4) Note that A, B, C, D, and E are gain constants, and F is a calculation constant.

In Step 7 350, the amount of air blown on the left and right sides during front solar radiation is determined as the blower voltage Bs using the graph shown in Step 350 based on the total signal T determined in Step 340.

Further, in step 360, the lowest voltage Bo of the blower voltage BS is determined in proportion to the solar radiation amount Ts.

In step 370, the amount of air blown on the left and right sides according to the solar radiation direction is calculated using equations (5) and (6) below, and the amount of air blown on the shaded side and the sunny side is determined as the blower voltage. These two formulas calculate the difference in blower voltage as the airflow amount on the solar radiation side and the non-solar radiation side, divide this value by the solar radiation azimuth control range of 40°, and calculate the control azimuth for the blower voltage Bs at the solar radiation azimuth of 0°. 0
In the case of the blower voltage BXX on the sunny side, it is added, and in the case of the blower voltage Bx on the shaded side, it is determined by subtraction.

BX = Bs (Bs Be) (l θ l-30)/40・
(5) BXX=BS + (Bs Be) (l θ 30) /40 (6) As a result, the amount of air blown on the right side and the left side is set to the shade side or the sunny side.

In step 380, the actual mode is determined and V
In the case of ENT mode or Bl/L mode, the shade side blower voltage B8 determined in step 370 is:
Step 37 as shown in the graph shown in step 390
It is output to the right or left blower motor control circuit 58a, 58b set in step 37.
The blower voltage BXX on the sunny side obtained at step 0 is calculated at step 370 as shown in the graph shown at step 400.
The output is output to the left or right pro-ar motor control circuits 38a, 38b set in , and control of the left and right air blowing amounts is executed. In step 390, the blower voltage after reducing the blower voltage ΔBv to reduce the air volume is equivalent to the blower voltage B0 during solar heat, and can ensure the minimum air volume. Further, in step 400, when setting the maximum air volume on the sunny side, the blower voltage is increased by the amount of decrease in the air volume on the shade side, that is, the decrease in blower voltage ΔBY, so that excessive cooling can be suppressed.

Further, in step 380, the VENT mode or B
In the case of modes other than L/L mode, there is no need for left and right discipline, so both pro-a fan motors are operated in step 350.
and step 410 set in step 360
is controlled as shown in the graph.

After the blower fan motor is controlled as described above, the process returns to the main routine in step 420.

Next, the second aspect of the present invention will be described. The amount of air blown is controlled not only by the above-mentioned solar radiation direction but also by the solar radiation altitude.

That is, in the embodiment shown in FIG. 3, the solar radiation sensors are on the left and right, but in this example, as shown in FIGS. 9 and 10,
Three solar radiation sensors 48a, 4 provided on the left and right surfaces and the top surface
8b and 48c, each solar radiation"l T S R,
T S L , T S )l are input to the microcomputer 30 . The solar radiation height signal (shown in FIG. 11) Hss is calculated from each solar radiation amount using the following equation (7).

H3, = +1as+ to 3(TSHTSLR) /T
so... (7) In addition, h4s is 0.5 at an altitude of 45°,
TsL, l is calculated as (Tsi + TSL)/Kz.

As shown in FIG. 13, when the solar radiation altitude H3N is large, the solar radiation altitude is high, so the correction amount is decreased, and when the solar radiation altitude H5N is small, the solar radiation altitude is large and the correction amount is increased.

That is, the amount of air blown is linearly corrected compared to the solar radiation altitude.

Incidentally, FIG. 14 shows a flowchart of the second invention, in which step 335 "solar radiation height calculation", step 375
"Calculation of each air blow amount according to solar radiation altitude", step 405 "
Each step of solar radiation altitude ventilation setting division WJ, ST, 7B 415 "addition of correction amount based on solar radiation direction and solar radiation altitude" has been added.

As a result, the amount of air blown by the blower is corrected based on the solar radiation direction and solar radiation altitude.

(Effects of the Invention) As explained above, according to the first invention, the amount of air blown by the left and right blowers can be adjusted depending on the solar radiation direction, and the air conditioning feeling can be improved.

According to the second invention, since the amount of air blown by each blower is adjusted by adding the solar radiation altitude in addition to the solar radiation direction, the air conditioning feeling becomes even better.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the first invention, FIG. 2 is a block diagram showing the configuration of the second invention, FIG. 3 is an explanatory diagram showing the configuration of the embodiment of the first invention, and FIG. FIG. 5 is a flowchart showing the control according to the first invention executed in a microcomputer, FIG. 6 is a flowchart showing the solar radiation direction calculation routine, and FIG. 7 is a flowchart showing the solar radiation direction calculation routine for the vehicle. FIG. 8 is an explanatory diagram of a graph showing left and right solar radiation amounts and calculated values; FIG. 9 is a plan view showing the arrangement of solar radiation sensors; FIG. 10 is a similar side view; The figure is an explanatory diagram of solar radiation altitude, Figure 12 is a graph showing the relationship between solar radiation altitude I''13N and solar radiation altitude, Figure 13 is a graph showing the relationship between H3N and blower voltage, and Figure 14 is a microcomputer 15 is an explanatory diagram showing the configuration of the conventional technology. 1. Air conditioner, 3. Partition plate, 4a, 4b-air conditioning duct. , 5a, 5b... blower, 9a, 9b... blower motor. Patent applicant: Diesel Kiki Co., Ltd. Figure 7 Figure 1O Figure 48b \... Figure 11 Figure 12 Figure SN Figure 13

Claims (2)

[Claims] 1. In a vehicle air conditioning control system, two systems of air conditioning ducts are provided for blowing out conditioned air corresponding to the left and right sides of the vehicle, and a blower and a heat adding means are arranged in each air conditioning duct from the upstream side. A heat load detection means for detecting a heat load from temperature and a set temperature; a solar radiation detection means for detecting the amount of solar radiation by arranging a plurality of solar radiation sensors at predetermined positions; and each solar radiation detected by the solar radiation amount detection means. a solar radiation calculation means for calculating a solar radiation amount for control from the amount of solar radiation; a solar radiation direction calculation means for calculating a solar radiation direction from each solar radiation amount detected by the solar radiation amount detection means; a total signal calculation means for calculating a total signal by adding at least the amount of solar radiation for control from the solar radiation amount calculation means; and an air volume calculation means for calculating the air volume of the blower based on the total signal from the total signal calculation means; It is characterized by comprising air blowing amount correction means for correcting the air blowing amounts of the two blowers obtained by the air blowing amount calculating means based on the solar radiation direction obtained from the solar radiation direction calculating means and outputting the corrected air amounts to the left and right blower driving means. Blower control device for vehicle air conditioning control device. 2. In a vehicle air conditioning control system, two systems of air conditioning ducts are provided for blowing out conditioned air corresponding to the left and right sides of the vehicle, and a blower and a heat adding means are arranged in each air conditioning duct from the upstream side. A heat load detection means for detecting a heat load from temperature and a set temperature; a solar radiation detection means for detecting the amount of solar radiation by arranging a plurality of solar radiation sensors at predetermined positions; and each solar radiation detected by the solar radiation amount detection means. a solar radiation calculation means for calculating a solar radiation amount for control from the solar radiation amount; a solar radiation direction calculation means for calculating a solar radiation direction from each solar radiation amount detected by the solar radiation amount detection means; solar radiation altitude calculation means for calculating a solar radiation altitude from the solar radiation amount; and comprehensive signal calculation means for calculating a total signal by adding at least the solar radiation amount for control from the solar radiation amount calculation means to the heat load from the thermal load detection means. , an air blowing amount calculating means for calculating the air blowing amount of the blower based on the comprehensive signal from the comprehensive signal calculating means, and a solar radiation direction obtained from the solar radiation direction calculating means and a solar radiation altitude obtained from the solar radiation altitude calculating means. A blower control device for a vehicle air conditioning control device, characterized in that the blower control device is equipped with an airflow amount correction means for correcting the airflow amounts of two blowers obtained by an airflow amount calculation means and outputting the corrected airflow amounts to left and right blower drive means.