JPH0214911A - Controller for car air conditioner - Google Patents

Abstract

PURPOSE:To perform very careful control over an auto air conditioner by finding a composite parameter to detection temperature in interpolating car inside temperature, detecting a basic composite parameter experimentally found in advance, with car outside temperature, and also finding a control data in operating the desired blowoff temperature in addition. CONSTITUTION:The experimental value of a composite parameter is found out of plural numbers of typical car inside and outside temperatures and stored in a basic composite parameter memory means 110 in advance. On the other hand, a composite parameter operational means 120 interpolates a basic composite parameter with each detected value of a car room inside temperature sensor 22 and a car room temperature sensor 23 and operates the composite parameter to the detected temperature. A desired blowoff temperature operational means 130 operates a desired blowoff temperature with this composite parameter and a setting temperature being inputted out of a temperature setter 21, and a control data is operated by a control data operational means 140. With this control data, a control means 100 control air-conditioning equipment. Thus, very careful control is achievable.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention forms control data for controlling air conditioning equipment based on various control factors in a vehicle air conditioning system called an auto air conditioner. This invention relates to a control device with improved processing.

(Prior Art) Conventionally, a method disclosed in Japanese Patent Publication No. 59-39334 is known as a method for controlling an air mix door, and its outline is shown in FIG.

This includes the set temperature TD set by the temperature setting device 21, the vehicle interior temperature TR detected by the vehicle interior temperature sensor 22, the vehicle exterior temperature TA detected by the vehicle exterior temperature sensor 23, and the vehicle exterior temperature TA detected by the position detection sensor 24. Using the position XP of the air mix door 12 as a control factor, these data are converted into digital signals via the A/D converter 27 and input, and each of the input data is given a preset gain (A
.

Add B, C, and D, of which B-TR and C-TA.

Add D-Xp using equation (1) to create the synthesis parameter □
Find K1=B-TR+C-TA+DXp+F...Equation (1) (however, F is a correction coefficient) Based on this 4 and A-TD which added gain to TO, air mix door 12 is calculated. Control data for the movement is calculated, and the position of the air mix door 12 is controlled by the control means 100 based on this control data.

(Problem to be solved by the invention) By the way, up to the second item on the right side of equation (1) above is
M, then it is expressed as It is represented by a group of straight lines whose intercept is constant (=B) and changes depending on TA.

However, the result obtained through experiments based on TR and TA of the most suitable composite parameter Depending on the temperature conditions, it may not always be optimal, and the drawback is that the air conditioning equipment cannot be delicately controlled to match the feeling desired by the occupants.

In order to avoid this drawback, XM is determined in advance for all possible values of TR and TA by experiment, and all of them are stored as map data and calculated from arbitrary input TR and TA. A method of extracting map data of This has the disadvantage that the overall accuracy deteriorates.

Therefore, an object of the present invention is to provide a control device for a vehicle air conditioner that can accurately form optimal control data tailored to the passenger's experience based on a small amount of map data and perform fine temperature control. There is.

(Means for Solving Problem 21) As shown in FIG. A sensor 22, a vehicle exterior temperature detection sensor 23 that detects the vehicle exterior temperature, and a control means 100 that controls the air conditioning equipment based on the calculated control data.
A control device for a vehicle air conditioner comprising: a basic composite parameter storage means 110 storing experimental values of composite parameters determined for a plurality of representative vehicle interior temperatures and vehicle exterior temperatures; a synthetic parameter calculating means 120 that interpolates the data stored in the basic synthetic parameter storage means '110 from the output values of the sensor 22 and the vehicle outdoor temperature sensor 23 and calculates a synthetic parameter for the output value, and this synthetic parameter calculating means 120 and a target blowout temperature calculation means 130 which calculates a target temperature of the blowout air based on the calculation result of the temperature setting device 21 and the output value of the temperature setting device 21; In addition, as shown in FIG. In a control device for a vehicle air conditioner, which includes an indoor temperature sensor 22, an outdoor temperature sensor 23 that detects the outdoor temperature of the vehicle, and a control means 100 that controls the air conditioning equipment based on calculated control data, a basic composite parameter storage means 150 that stores aggregated data of synthetic parameters experimentally determined for changes in vehicle interior temperature when the temperature is kept constant for each of a plurality of vehicle exterior temperatures, and the output of the vehicle exterior temperature sensor 23; a selection means 160 for selecting aggregate data of the synthetic parameters from the basic synthetic parameter storage means 150 according to the value; and a selection means 16 for selecting the set data of the synthetic parameters from the output value of the vehicle interior temperature sensor 22.
a synthetic parameter calculation means 120 that interpolates the set data of the synthesis parameters selected by 0 and calculates a synthesis parameter for the output value; the calculation result of this synthesis parameter calculation means 120; the output value of the temperature setting device 21; a target blowout temperature calculation means 130 that calculates a target temperature of the blowout air based on the target blowout temperature calculation means 130;
A control data calculation means 140 is provided for calculating control data for controlling the air conditioner based on the calculation results.

(Function) Therefore, based on the experimental values of the composite parameters stored in advance in the basic composite parameter storage means, the composite parameters for the output values are determined by interpolation from the output values of the vehicle interior temperature sensor and the vehicle exterior temperature sensor. Therefore, despite the small amount of map data, a value that is equal to or very close to the value determined experimentally can be obtained no matter what the temperature inside the vehicle and the temperature outside the vehicle, and as a result, the optimal target blowout temperature can be determined. It is possible to form control data that can be obtained accurately and realizes fine-grained temperature control that matches the passenger's experience.

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

In FIG. 3, the vehicle air conditioner is provided with an intake switching device 2 on the most upstream side of an air conditioning duct 1, and this intake switching device 2 has an internal/external air switching device in a part where an internal air inlet 3 and an external air inlet 4 are separated. A door 5 is disposed, and by operating the inside/outside air switching door 5 with an actuator 6, the air introduced into the air conditioning duct 1 can be selected 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 and a heater core 9 are provided behind the blower 7.

The evaporator 8 is connected to a compressor 10 and the like through piping to form a cooling cycle, and the compressor 10 is connected to an engine (not shown) via an electromagnetic clutch 11, and is controlled on and off by connecting and connecting the electromagnetic clutch 11. .

Further, the heater core 9 is configured to heat the air passing through the heater core 9 through circulation of engine cooling water. In front of this heater core 9 is an air mix door 1.
By adjusting the position of this air mix door 12 with an actuator 13, the amount of air passing through the heater core 9 and the amount of air bypassing the heater core 9 can be changed, and as a result, the amount of blown air temperature is controlled.

The downstream side of the air conditioning duct 1 is divided into a defrost outlet 14, a vent outlet 15, and a heat outlet 16, which open into the vehicle interior, and a mode door 17 is provided in the divided part.
．． A desired blowing mode can be obtained by operating this mode door 17.18 using an actuator 19.20.

21 is a temperature setting device for setting the set temperature TD in the vehicle interior;
2 is a vehicle interior temperature sensor that detects vehicle interior temperatures T and R;
3 is a vehicle exterior temperature sensor that detects vehicle exterior temperature TA; 24;
25 is a device detection sensor composed of, for example, a potentiometer, which detects the position xP of the air mix door 12;
26 is a mode sensor provided at the evaporator 8 or behind the evaporator 8 to detect the temperature of the evaporator 8 or the temperature TE of the air passing through the evaporator 8; 26 is a solar radiation sensor that detects the amount of solar radiation; these signals are sent to a multiplexer ( MPX) 28 selectively converts the A/D converter 2
7 converts it into a digital signal and inputs it to the microcomputer 30.

The microcomputer 30 is connected to a central processing bag (not shown) [
(CPU), read-only memory (ROM), random access memory (RAM), input/output port I10 port, etc. The actuator 6.13°t9i20
, outputs control signals to the motors of the compressor 10 and the blower 7 via drive circuits 31a to 31e, respectively, and controls the drive of each door 5, 12, 17.18, and the compressor 10.
on/off control and motor rotation control.

FIG. 4 shows an example of control of the air mix door 12 in the microcomputer 30 as a flowchart, and the following description will be made based on this flowchart.

The microcomputer 30 starts executing the program from step 50 in the same way as starting the air conditioner, and in the next step 52, the various signals TO are output.

Enter TA, TA, XP, TE, etc. and proceed to the next step 54
Proceed to.

In this step 54, based on the set temperature TO (
4) Calculate the correction parameter XM according to the formula.

XM, =α・TO+β (1) where α is the gain of the setting device, and β is a correction term based on the amount of solar radiation, etc.

In the next step 56, using the vehicle interior temperature TR and vehicle exterior temperature TA as parameters, a composite parameter (XM2=/(TR, TA) previously stored in the ROM is determined from predetermined map data. The map 70 calculates the value of XM in advance based on some representative values of TA and TH through experiments, and plots these experimental values XM on a coordinate system with the vertical axis and TR as the horizontal axis. It has a three-dimensional structure in which the characteristic lines of TA are expressed in the same coordinate system.

Note that the representative point of TR and TA is XM, and it is desirable to find a boundary where the value of XM changes significantly nonlinearly and select that point.

Using this map 7o, the value of XM (MX) corresponding to the actual TR (referred to as RX) and TA (referred to as AX) input from the vehicle interior temperature sensor 22 and the vehicle exterior temperature sensor 23 In order to find, first, as shown in Fig. 5, calculate Rn and Rn+1 of two adjacent points plotted with respect to RX such that Rn<Rx<Rn+1, and calculate the inner hole of TR using equation (2). Find (a).

Rx-Rn Rn+1-Rn ”” Formula (2) also.

Also for Ax, find Am and Am+1 closest to Ax such that Am<Ax<Am+1 from among the representative TAs,
Find the inner hole (b) of TA using equation (3), Am+ 1-
A+a Next, the above-mentioned Rn, Rn+1 and AOI, AIl+
Extract the four points (r, s, t, u) plotted from 1 and calculate the difference between the value of XM at point r (Mn, a+) and the value of XM2 at point S (Mn+1.m). The value of point XM, (M n
, m +1) and the value of XM at point U (Mn+1.
rrh+1) is multiplied by the inner hole (a), and an interpolation calculation is performed using equation (4), and the point on Am of Rx (
P) and the point (Q) on Am+1, the value of XM (MP and M
Let Q) be obtained.

Mp= −((Mn, m−Mn+ 1 , m) a 4
M n , m) MO= ((Mn, m+l−Mn+
1. m+1) a+Mn, m+1) ---(4)
Equation Then, the difference between Mp and MQ is multiplied by the inner hole (b), and interpolation calculation according to equation (5) is performed to obtain the value (M x ) of XM for Rx and Ax.

Mx= ((Mp MQ)b+Mp)"" (5) Formula Therefore, from a local perspective, the adjacent map data of TA can be approximated by a straight line, but each plot is determined based on experiments. Therefore, XM can be calculated in a form extremely close to the experimental value, and the amount of map data can be significantly reduced compared to a format in which XM2 is stored for all possible values of TR and TA. Highly accurate processing can be achieved with sufficient memory capacity.

After determining the synthesis parameter (XM, ) in this way, the process proceeds to step 58, and based on the correction parameter (XL) obtained in step 54 and the synthesis parameter (XM, ) obtained in the previous step 56, ( Calculate the required blowout temperature (Xm) using formula 6), and calculate
The air mix door 12 is controlled so that the actual blowout temperature (XR) becomes XM.

The actual blowout temperature XR may be obtained by actually measuring the temperature of the air blowing out from the blowout port, but in this embodiment, the actual blowout temperature
and the output value TE of the mode sensor 25, XR (= g
(XP, TE)) is obtained, and in step 60, the value of XR for arbitrary XP and TE is obtained from this map 80 using the same method as the method used to obtain the above-mentioned XM.

Then, in the first step 62, the control amount of the air mix door 12 is calculated so that XR becomes XM, and a control signal is output to the drive circuit 31b, and then in step 52
It's like going back to.

In FIG. 6, an embodiment of the second invention is shown as a flowchart. In this invention, the synthesis parameters
I try to find it starting from 0.

That is, the map group used here sets TA to multiple values (
A1. A2. A, . It has a two-dimensional structure in which the experimental values of XM2 are plotted on a coordinate system with XM2 and TR as axes.

After XM is determined in step 54, the map with the rank closest to the detected vehicle outside temperature TA is selected from the map group 90, and the map is then moved to step 64, where the detected vehicle interior temperature is determined in step 66. Extract two adjacent map data before and after that temperature from TR, (2)
Similarly to equation (4), XM is calculated by interpolation.

After XM is calculated, the processing from step 58 onwards is performed in the same way as in the previous embodiment.

According to this method, it is possible to perform interpolation calculations when calculating Although it is necessary to increase the number of sheets, that is, the memory capacity, the same functions and effects as the first invention can be sufficiently obtained.

Note that other steps are the same as those in the first invention, so the same steps are given the same numbers and the description thereof will be omitted.

Further, in the two embodiments described above, the necessary blowout temperature is used to form a control amount for controlling the air mix door 12, but the inside/outside air switching door 5, the blower 7, the compressor 1o, the mode door 17, 18 It can also be used to form control data for controlling etc.

(Effects of the Invention) As described above, according to the present invention, when determining a synthesis parameter based on the vehicle interior temperature and the vehicle exterior temperature,
Since experimental values of synthetic parameters stored as map data are interpolated, highly accurate control data can be reliably created based on a small amount of data, allowing fine-grained temperature control that matches the occupant's experience at any time. It can be done.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of the invention based on claim 1.
The figure is a functional block diagram of the invention based on claim 2, FIG. 3 is a configuration diagram showing an embodiment of the control device in this invention, and FIG.
The figure is a flowchart showing an example of controlling the air mix door by the microcomputer in the same as above, Figure 5 is a partially enlarged view of the map shown in the same as above, and Figure 6 shows another example of controlling the air mix door by the microcomputer. Flowchart, FIG. 7 is a configuration diagram showing a conventional technique. FIG. 8 is a diagram showing the characteristics of the synthesis parameters in the same as above. 21... Temperature setting device, 22... Vehicle interior temperature sensor,
23... Vehicle outside temperature sensor, 100... Control means. 110...Basic synthesis parameter storage means, 120...
- Synthesis parameter calculation means, 13o...Target blowout temperature, 140...Control data calculation means, 150...Basic synthesis parameter storage means. Patent applicant: Diesel Equipment Co., Ltd.

Claims (2)

[Claims] 1. A temperature setting device that sets the temperature, a vehicle interior temperature detection sensor that detects the vehicle interior temperature, a vehicle exterior temperature detection sensor that detects the vehicle exterior temperature, and a control means that controls the air conditioning equipment based on the calculated control data. A control device for a vehicle air conditioner, comprising: a basic composite parameter storage means storing experimental values of composite parameters obtained for a plurality of representative vehicle interior temperatures and vehicle exterior temperatures; and the vehicle interior temperature sensor. a synthetic parameter calculating means for interpolating the data stored in the basic synthetic parameter storing means from the output value of the vehicle outdoor temperature sensor and calculating a synthetic parameter for the output value; and a calculation result of the synthetic parameter calculating means and the temperature. target blowout temperature calculation means for calculating a target temperature of the blowout air based on the output value of the setting device;
A control device for a vehicle air conditioner, comprising: control data calculation means for calculating control data for controlling the air conditioner based on the calculation result of the target blowout temperature calculation means. 2. A temperature setting device that sets the temperature, a vehicle interior temperature sensor that detects the vehicle interior temperature, a vehicle exterior temperature sensor that detects the vehicle exterior temperature, and a control means that controls the air conditioning equipment based on the calculated control data. In a control device for a vehicle air conditioner, a basic composite parameter is stored for each of a plurality of vehicle exterior temperatures, which is a set of composite parameters that have been experimentally determined for changes in vehicle interior temperature when the vehicle exterior temperature is held constant. storage means; selection means for selecting the aggregate data of the composite parameters from the basic composition parameter storage means according to the output value of the vehicle interior temperature sensor; a composite parameter calculating means for interpolating the set data of the selected composite parameters and calculating a composite parameter for the output value; target air temperature calculation means for calculating a target temperature of the air conditioner; and control data calculation means for calculating control data for controlling the air conditioner based on the calculation result of the target air temperature calculation means. Characteristic control device for vehicle air conditioner.