JPH0325018A - Air-conditioning control unit for automobile - Google Patents

Abstract

PURPOSE:To stabilize air conditioning control by comparing the calculation result of a selection intake mode with that of an automatic intake mode, selecting basic temperature adjustment control when the compared result is equal or the atomosphere temperature is within predetermined limits, and selecting correction temperature adjustment control when the compared result is different and the atomospheric temperature is beyond the predetermined limits. CONSTITUTION:An automatic intake mode calculation means 200 automatically sets an intake mode by an integrated signal calculated by an integrated signal calculation means 100 from an interior temperature, an atomospheric temperature and a set temperature. Meantime, when a manual intake mode setting means 300 sets a mode other than automatic setting, an intake mode judging means 400 compares an automatic setting intake mode with a set mode. When the compared result is equal or the atomospheric temperature is within predetermined temperature limits, a basic temperature control means 600 conducts basic temperature adjustment value control. When the intake mode judged result is different and the judgement of the atomospheric temperature judging means 500 is beyond the predetermined limits, a correction temperature adjustment control means 700 conducts correction control. Due to this construction, the control is stabilized.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an automotive air conditioning control device that automatically switches between inside and outside air. This invention relates to an air conditioning control device for automobiles that prevents temperature control malfunctions.

(Prior art) Conventionally, in a type of vehicle air conditioning control device that automatically controls the switching of an intake door (inside/outside air switching door),
It has been proposed to automatically correct disturbances in the air conditioning inside the vehicle that occur when the intake door is switched automatically or manually. For example, Japanese Utility Model Publication No. 63-245 discloses means for generating an operation signal to increase the rate of air intake into the passenger compartment, and correcting compressor control to increase cooling capacity when this operation signal is generated. It is disclosed that by providing a correction means to automatically increase the cooling capacity when the intake door is manually switched to introducing outside air during cooling, the cooling capacity is automatically increased, mainly to prevent fogging of window glass, etc. ing. Also, Jikko Sho 64-
In Publication No. 8409, an intake door position sensor is provided to detect the position of the intake door, and automatic detection is performed when the intake door switches from outside air intake to inside air circulation, or when there is a difference between outside air temperature and vehicle interior temperature. It is disclosed that an attempt is made to stabilize the air conditioning inside a vehicle by correcting the opening degree of the air mix door.

(Problem to be Solved by the Invention) However, in conventional auto-controlled vehicle air conditioning control systems (particularly the latter conventional example), in general, internal air circulation (REC) is used as a standard in the summer, and outside air is introduced (REC) in the winter. F.R.E.
If the internal/external air intake control pattern is set based on SH), and the occupant manually sets a setting different from the set standard (F R E S H in summer, R E S H in winter).
已C), the temperature difference between the inside temperature of the vehicle and the outside air temperature is large in both summer and winter (10
degree (approximately 20 degrees or more in winter), so in either case, the temperature inside the vehicle becomes higher than the set value (control value) at the time of switching. In addition, in the former conventional example, at least the problem of temperature rise inside the vehicle at the time of switching the intake door during heating during winter is solved, even if the temperature rise inside the vehicle due to the switching of the intake door during cooling can be avoided. It had not been done. Furthermore, as in the conventional example described above, when correcting the air mix door control or the compressor control, the air outlet temperature changes, so the air conditioning feeling changes and the occupants may feel uncomfortable.

Therefore, this invention solves the above-mentioned conventional problems, and even if the intake door is set to a different setting than the automatic control setting due to an unexpected cause such as manual operation, in both summer and winter, the switching point An object of the present invention is to provide an air conditioning control device for an automobile that can perform stable air conditioning control without increasing the temperature inside the vehicle.

(Means for Solving the Problem) As shown in FIG. 1, the gist of the present invention is that, as shown in FIG. A blower 7, an air mix door 10 that changes the mixing ratio of cold air and hot air, and air UR equipment 7, 10 that affects temperature control such as a compressor 18 that constitutes a part of the refrigeration cycle. 18, etc., a small number < 100 stages of comprehensive signal calculation that calculates a comprehensive signal corresponding to the heat load in the vehicle interior based on the degree, outside air temperature, and set temperature in the vehicle interior] OO, and from the outside air temperature detector 26. an outside air temperature determination step 500 for determining the detected outside air; an automatic intake mode calculation means 200 for calculating an intake mode when automatic setting is selected based on the comprehensive signal obtained by the comprehensive signal calculation step 100; When an inhalation mode is selected by the manual inhalation mode setting means 300 which instructs an inhalation mode other than the manual inhalation mode at the time of setting, and the inhalation mode is selected by the automatic setting and manual inhalation mode setting means 300, the automatic inhalation mode calculation means 200 If the determination results of the suction mode determination means 400 are the same suction mode, or the determination by the outside air temperature determination means 500 If the result is within a predetermined temperature range, a control signal based on the basic temperature control value obtained from the comprehensive signal is sent to the air conditioning equipment 7, 10, which affects the temperature control. 18, etc. Basic temperature control control means 600 and the suction mode judgment stage 4
If the determination result of 00 is a different suction mode, and the determination result of the outside air temperature determination stage 500 is higher than the upper limit value of the predetermined temperature or lower than the lower limit value of the predetermined temperature, the correction temperature is Air conditioning equipment 7, 10, 18, etc. that uses control signals based on control values to affect temperature control
c.

(Function) Therefore, a comprehensive signal is calculated by the comprehensive signal calculation means l00 based on the vehicle interior temperature, outside air temperature, vehicle interior set temperature, etc., and the intake mode is automatically set based on this comprehensive signal. It is calculated by the mode calculation means 200. On the other hand, the manual etc. suction mode calculation means 300 calculates the suction mode set manually (including the case based on the detection value of a sensor that detects various environmental signals such as an outside air pollution sensor) other than the automatic setting. The calculation results from the manual suction mode calculation 300 and the calculation results from the automatic suction mode calculation means 200 are used in the suction mode determination means 40.
0 is used for comparison and determination. This inhalation mode determining means 40
If the determination result of 0 is the same suction mode, or if the determination result of the outside air temperature determination means 500 is within the predetermined temperature range, the basic temperature control control 600 outputs a control signal based on the basic temperature control value. Air conditioner a 7, 1 that affects temperature control
0.18, etc. Further, if the determination results of the suction mode determination means 400 are different in the suction mode, and the determination result of the outside air temperature determination means 500 is higher than the upper limit value of the predetermined temperature and lower than the lower limit value of the predetermined temperature, the correction temperature Air conditioning equipment 7, 10 whose temperature control is affected by a control signal based on the corrected temperature control value by the control control means 700.
, 18, etc.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. In Fig. 2, the automotive air conditioning control system includes an air conditioning duct 1
An inside air population 2 and an outside air population 3 are provided on the most upstream side of the system, and an intake door (inside/outside air switching door) 5 is arranged at the part where the inside air population 2 and outside air population 3 are separated. Air conditioning duct 1 by operating
A desired intake mode can be obtained by selecting the air introduced into the interior between inside air and outside air.

The blower 7 sucks air into the air conditioning duct 1 and blows it downstream, and an evaporator 8 is disposed behind the blower 7. The evaporator 8 is connected to piping together with a compressor 18 that compresses the refrigerant, a condenser 19 that liquefies the refrigerant, a receiver tank 20 that temporarily stores the liquefied refrigerant, and an extraction valve to form a refrigeration cycle. A heater core 9 is disposed behind the evaporator 8, and an air mix door 10 is provided upstream of the heater core 9. The opening degree of the air mix store IO is controlled by an actuator 10a.
By adjusting the amount of air passing through the heater core 9 and the amount of air bypassing the heater core 9, the temperature of the blown air can be controlled.

The downstream side of the air conditioning duct 1 includes a defrost outlet 1l, a vent 12, and a foot outlet 1.
3 opens into the vehicle interior 30, and mode doors 14, 15, and 16 are provided at each outlet. The mode doors 14 15 16 are controlled by an actuator 17 to obtain a desired blowing mode.

The motors of the actuators 6.10a, 17 and the blower 7 are driven by drive circuits 40a, 40b, 40c, respectively.
, 40d. The drive circuits 40a to 40d are connected to the microcomputer 33.

On the other hand, a vehicle interior temperature sensor 2 that detects the vehicle interior temperature Tr
5. An outside air temperature sensor 26 that detects the outside air temperature Ta, a potentiometer 27 that detects the opening degree of the air minx door 10, a solar radiation sensor 28 that detects the amount of solar radiation on the left and right sides, and a humidity sensor that detects the degree of fogging on the window glass inside the vehicle. Detection signals from the sensor 44, the air pollution sensor 45 that detects the degree of pollution of the air inside the vehicle, the outside air dirt sensor 46 that detects the degree of pollution of the outside air, etc. are selected by the multiplexer 31 and sent to the A/DA.
j'! y gK 3 2 is input, and after being converted into a digital signal G, the microcombi! Ichiyo 3
34: Input.

The control knob 37 includes a temperature setting device 38 (having a knob 38a) for setting a set temperature in the vehicle interior.
, set the outlet mode to vent (VENT), pie level (
Bl-L), foot (FOOT), differential/foot (DE
F/FOOT), a mode setting device 39 (having a knob 39a) that switches between the air conditioner and the differential (DEF), an inside/outside air selector switch 41 that switches between outside air introduction and inside air circulation, an air conditioner (A/C) switch 42 that operates the compressor, and a blower. The fan lever 43 (having a knob 43a) for switching the rotational speed of the fan 7, etc. is provided, and these setting signals are input to the microcomputer 33.

Next, an example of the control operation of the microcomputer 33 will be explained with reference to the flowchart shown in FIG. Starting from a start step 50, in step 52, various sensors, such as a vehicle interior temperature sensor 25, an outside air temperature sensor 2
6, each detection value Tr, Ta, Te, Ts of the potentiometer 27, solar radiation sensor 28, etc. and the control panel 33
Data input processing is performed to input setting operation signals (vehicle interior temperature setting T set etc.) from the microcomputer 33 to the microcomputer 33 . In the next step 54, it is determined whether the air conditioner is controlled automatically or manually.

If automatic, proceed to step 58; if manual, proceed to step 56. In this step 56, manual selection of the inhalation mode is performed. In the case of automatic control, the process proceeds to step 58, where a total signal T corresponding to the heat load inside the vehicle is calculated. The calculation of this total signal T is performed using, for example, the human data as follows: T=Tr+Ka −Ta+Ks−
Ts + Ke + Te Kset' Tsat
+c (However, Ka, K S % K e -, K
s@t is a gain constant and C is an arithmetic constant). When this calculation is completed, the process proceeds to step 60, where a suction mode calculation is performed to determine the setting state of the intake door 5, and the intake door 5 is controlled to be in the suction mode according to the calculation. Thereafter, the process advances to step 64, where a window defogging process is performed, and the subroutine thereof is described in FIG. That is, in this subroutine, control is started from start step 101, and a signal from the humidity sensor 44 attached to the glass surface is sent to step 110.
The process proceeds to step 120, where it is determined whether or not the glass surface is cloudy; if it is cloudy, step 13 is entered.
0, the intake door control is performed based on demist control, that is, the intake door 5 is set to introduce outside air, and if there is no fog, the process proceeds to step 140 and the step 58.6 is performed.
The state where the inhalation mode calculation and selection are performed based on the total processing signal at 0 is maintained.

Then, the process returns to the main routine from return step 150. Once the window defrosting control is processed in step 64, the process proceeds to step 66. The step 66
In this step, the air inside the vehicle is cleaned of dirt. The subroutine of step 66 is shown in FIG. 5, and control is started from start step 201, and at step 210 a signal from the air pollution sensor 45 provided in the vehicle interior is input. The process then proceeds to step 220 to determine if the air is contaminated. If the air is contaminated, the process proceeds to step 230, where the intake door 5 is set to introduce outside air based on the cleaning control. If the air is not contaminated, the process proceeds to step 230. Then, the process proceeds to step 240, and the state in which the inhalation mode calculation and selection are performed based on the overall signal processed in steps 58 and 60 is maintained. Then, the process returns to the main routine from return step 250. When the stain control of the air inside the vehicle is processed by the stem 66, the process proceeds to step 68, where the control of the pollution of the air outside the vehicle is performed. This step 6th subroutine is
As shown in the figure, control is started from a start step 30l, and step 31. At 0, the signal from the outside air dirt sensor 46 is input manually. Then, the process proceeds to step 320, where it is determined whether the outside air is contaminated, and if the outside air is contaminated, the process proceeds to step 330, where the intake door 5 is closed to the inside in order to stop introducing outside air. If air circulation is selected and the outside air is not contaminated, the process proceeds to step 340, and the state in which the inhalation mode calculation and selection based on the overall signal of the processing in steps 58 and 60 is performed is maintained. And return step 35
Return to the main routine from 0. When control of outside air contamination is completed on day 6, the process proceeds to step 70. In this step 70, it is determined whether or not the inhalation mode has been selected using a signal other than the inhalation mode setting signal based on the comprehensive signal (a signal based on the detection value of a manual or other sensor). If the suction mode is selected by a means other than the general signal, the process proceeds to step 72, where air conditioning control is performed using the basic temperature control value (shown by the solid line in FIG. 7) based on the general signal, and the overall If the inhalation mode has been selected by means other than the signal, step 7
Proceed to step 4. In this step 74, the step 6
The inhalation mode based on the total signal calculated in step 0 is compared with the inhalation mode selected manually or the like, and if they are equal, the process proceeds to step 72; if not, step 76
Proceed to. In this step 76, the outside air temperature T
The absolute value lra - αI of the difference between a and a predetermined temperature α°C is calculated, and if this absolute value is relatively small (for example, 15 de
If it is relatively large (for example, 15 degrees or more), the process proceeds to step 78. In this step 7 days, the deviation in temperature control that occurs when the intake door 5 is switched manually (or by the detected value of another sensor) is determined by the rotational speed of the blower 7, the opening degree of the air mix door 10, and the intake of the compressor 18. This is corrected by appropriately adjusting each pressure control amount. In other words, as shown in Fig. 7, the deviation of the warm feathers that occurs when the intake door 5, which was set to outside air intake (FRESH) during winter heating, is manually switched to inside air circulation (REC), is The control amount of the opening degree of the ξx door 10 and the rotational speed of the blower 7 are adjusted and corrected as appropriate. In addition, the deviation in temperature control that occurs when the intake door 5, which is set to internal air circulation (REC), is manually switched to outside air intake (FRESH) during cooling in the summer, the opening of the air mix door 10, the blower The rotational speed and the compressor suction pressure of No. 7 are adjusted and corrected as appropriate. That is, in both winter and summer, when the intake door 5 is switched manually, etc., each of the above-mentioned temperature control values is adjusted according to the corrected temperature control value shown by the broken line, which is obtained by appropriately correcting the basic temperature control value (shown by the solid line) based on the overall signal. This system corrects deviations in temperature control by controlling air conditioning equipment. In this figure, the control characteristic line of the intake door 5 is based on the overall signal. After each process in Step 7 7278 is completed, the process returns to the data input process in Step 52.

In this way, when the intake mode is changed manually other than auto or by the detected value of another sensor, and when the difference between the outside air temperature and the cabin temperature is relatively large (summer and winter), corrective temperature control is performed. (Effects of the Invention) As explained above, according to the present invention, when the intake door is manually switched while the intake mode is controlled automatically, If the outside air temperature is above a certain temperature (summer) or below a certain temperature (winter 11JI), at least a certain amount of correction is applied to the control of the blower, air intake door, and compressor, so when the intake door is switched, the overall It is possible to prevent the temperature inside the vehicle from becoming too high due to air conditioning control based on the signal, and stable temperature control can be performed. In addition, since the correction of the rotational speed control of the blower is not easily accompanied by a change in the blowout temperature, the occupants can obtain an air conditioning feeling that does not make them feel uncomfortable. Furthermore, when the intake door is manually switched between heating and cooling, the target temperature is reached more quickly in temperature control.

[Brief explanation of drawings]

Fig. 1 is a functional block diagram showing the structure of this invention, Fig. 2 is a structural diagram showing an automobile air conditioning control device in an embodiment of this invention, and Fig. 3 shows the main routine of the microcomputer used in the above. Figure 4 is a flowchart for window glass defogging control, Figure 5 is a flowchart for controlling air pollution inside the vehicle, Figure 6 is a flowchart for controlling air pollution outside the vehicle, and Figure 7 is a flowchart for controlling air pollution in each air conditioner. FIG. 3 is a characteristic diagram showing a basic temperature adjustment control value and its corrected temperature adjustment control value based on a comprehensive signal. 5...Intake door, 7...Blower, 10...
Air miss door, 18...Compressor, 26...
Outside temperature sensor, 33... microcomputer, l
00... General signal calculating means, 200... Automatic suction mode calculating means, 300... Manual etc. suction mode setting means, 400... Suction mode determining means, 500... Outside air temperature determining means, 600. ...Basic IJi control means, 7
00...Correction temperature control control means.

Claims (1)

[Claims] A blower that is located in an air conditioning duct and sucks air into the air conditioning duct and blows it downstream, an air mix door that changes the mixing ratio of cold air and hot air, and constitutes a part of a refrigeration cycle. an air conditioning device that affects temperature control such as a compressor; a comprehensive signal calculating means for calculating a comprehensive signal corresponding to the heat load in the vehicle interior based on at least the vehicle interior temperature, the outside air temperature, and the set temperature; and the comprehensive signal computing means automatic suction mode calculation means that calculates the suction mode when the automatic setting is selected based on the comprehensive signal obtained from the automatic suction mode calculation means; outside air temperature determination means that determines the detected outside air from the outside air temperature sensor; When an inhalation mode is selected by the manual inhalation mode setting means for commanding an inhalation mode of If the suction mode determining means for determining whether or not the suction mode is the suction mode, and the determination result of the suction mode determining means is the same suction mode, or if the determination result of the outside air temperature determining means is within a predetermined temperature range, A control signal based on the temperature control value influences the temperature control. The basic temperature control means output to the air conditioning equipment and the suction mode determination means have different determination results, and the determination result by the outside air temperature determination means is higher than the upper limit of the predetermined temperature or the predetermined temperature is higher than the predetermined temperature. An automotive vehicle characterized by comprising: corrective temperature control control means for outputting a control signal based on the corrected temperature control value to an air conditioner that affects temperature control when the temperature is lower than the lower limit value. Air conditioning control equipment.