JPH02169319A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To improve an air-conditioning feeling by constituting an altered input signal value so as to be compensated according to the operated value of an integrated signal operational means when any change has occurred in either of plural numbers of input signals being inputted in the said operational means for controling air-conditioning equipment. CONSTITUTION:At time of air-conditioning operation, an integrated signal equivalent to heat load in a cab is operated by an integrated signal operational means 300 on the basis of plural numbers of input signals or the like including cab temperature, setting temperature and solar radiation quantity, and according to the operated value, operation of air-conditioning equipment doing air-condition in the cab, for example, an inside-outside air selector door 4, a blower 5, an evaporator 6, an air-mix door 14 or the like is controlled. In this case, there is provided with a signal change detecting means 100 which detects a fact that a change has occurred in either of these plural input signals. When the signal change has been detected like this, the changed input signal valve is made so as to be compensated by an input signal compensating means 200 according to the operated value of the integrated signal operational means 300.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention calculates a comprehensive signal using the amount of solar radiation inside a vehicle as one element, and operates air conditioning means such as a blower and an air mix door based on this comprehensive signal. The present invention relates to a vehicle air conditioner to be controlled.

(Prior Art) Conventionally, a value obtained by multiplying the outside air temperature, the set temperature inside the vehicle interior, the amount of solar radiation, etc. by an appropriate gain constant and adding these has been used as a comprehensive signal for controlling the temperature inside the vehicle interior. A correction (solar radiation correction) is used in which the rise time is delayed by a predetermined period (the rise is increased). For example, in Japanese Utility Model Application Laid-open No. 62-92908, solar radiation is corrected by giving a relatively short delay time to the solar radiation detection value for a predetermined period from when the ignition switch is turned on, and then performing solar radiation correction with a relatively long delay time. A system has been disclosed that allows air conditioning to be performed without causing any discomfort to the user's body.

(Problem to be Solved by the Invention) However, in the above conventional example, the delay time of solar radiation correction is such that the air mix door is opened by solar radiation correction in a region where the outlet temperature changes, that is, in a region where the air mix door opening degree changes. Therefore, if the air conditioning equipment other than the air mix door controlled by the general signal, such as a blower, is set to the full heat position or the full When the speed is controlled according to changes in solar radiation after reaching the cool position, the speed changes are too fast for the occupants' perception, giving them an excessively warm or cold feeling, which ultimately impairs the air conditioning feeling. There was a problem with the loss.

Therefore, this invention solves the above-mentioned conventional problems,
It is an object of the present invention to provide an air conditioning system for a vehicle that smoothly harmonizes the air conditioning of each air conditioning device controlled by a comprehensive signal and does not impair the feeling of air conditioning for passengers when environmental conditions change. .

(Means for Solving the Problems) The gist of the present invention is, as shown in FIG. *, Ta, etc., a comprehensive signal calculating means 300 that calculates a comprehensive signal corresponding to the heat load in the vehicle interior, and the plurality of input signals T*, T.
signal change detection means 100 for detecting that a change has occurred in any one of the input signals T*, Ta, etc.; In this case, the comprehensive signal calculation means 30
Input signal correction means 200 corrects the changed input signal value in the calculation of the total signal calculation means 300 according to the calculation value of 0; Air conditioning equipment 4, 5.6 that performs air conditioning
The present invention also includes an air conditioner control means 400 for controlling the operations of the air conditioners and the like.

(Function) Therefore, when the signal change detection means detects a change in any one of the plurality of input signals of the comprehensive signal calculation means, for example, the signal of the detected value of solar radiation, this is transmitted to the input signal correction means, This input signal correction means corrects, for example, the rise delay time of the signal in which the change has occurred, in accordance with the calculated value of the total signal calculation means. Then, based on this corrected input signal, a new total signal is calculated by the total signal calculation means, and the calculation results of the total signal calculation means are used to control the air conditioning equipment such as air blowers, air mix doors, etc. The device is controlled, and therefore the above object can be achieved.

(Example) Hereinafter, an example of the vehicle air conditioner according to the present invention will be described with reference to the drawings. In FIG. 2, the vehicle air conditioner is formed in such a way that an inside air population 2 and an outside air population 3 are divided into two parts on the most upstream side of an air conditioning duct 1, and an inside/outside air switching door 4 is provided in the divided part. , this inside/outside air switching door 4
The opening degree of the air conditioning duct 1 changes continuously to adjust the ratio of inside air and outside air to be introduced into the air conditioning duct 1.

The blower 5 is for sucking air into the air conditioning duct 1 and blowing it to the downstream side, and an evaporator 6 is provided on the downstream side of the blower 5.

The evaporator 6 is connected with piping together with a compressor 7, a condenser 8, a receiver tank 9, an expansion valve IO, and a pressure control valve 11 to form a refrigeration cycle 36.

The compressor 7 has an electromagnetic clutch 13 for connecting and connecting the driving force transmitted from the engine 12.

The pressure control valve 11 controls the evaporation pressure of the evaporator 6 so that the temperature of the evaporator 6 does not drop below the freezing temperature even when the compressor 7 is continuously operated.

An air mix door 14 is provided on the downstream side of the evaporator 6.
and the heater core 15 are arranged, and the air mix door 14
The ratio of air sent to the heater core 15 and air bypassing the heater core 15 is adjusted according to the opening degree of the heater core 15 . The air that has passed through the heater core 15 and the bypassed air are mixed on the downstream side of the heater core 15 and their temperature is adjusted.

The rear end of the air conditioning duct 1 is divided into a defrost outlet 16, a vent outlet 17, and a heat outlet 18, which open into the vehicle interior 19, and mode doors 20a, 20b are installed in the separated parts.
are provided, and the Suita mode can be changed by selectively opening and closing the mode doors 20a and 20b.

The above-described internal/external air switching door 4, air mix door 14, and mode doors 20a, 20b are operated by actuators 21a to 21c, respectively, and the actuators 21a to 21c are operated by the microcomputer 23 via drive circuits 22a to 22c. Controlled based on output signal. In addition, the rotation speed of the blower 5 and the electromagnetic clutch 1
3 are similarly turned on and off by the drive circuits 22d and 22e, respectively.
It is controlled based on the output signal from the microcomputer 23 via the microcomputer 23.

The microcomputer 23 includes a central processing unit CPU, a read-only memory ROM, and a random access memory IJRAM.
etc. are well known. An AD converter 25 is connected to this microcomputer 23. This A
-D converter 25 includes a vehicle interior sensor 26 that detects the representative temperature in the vehicle interior 19 (the representative temperature in the vehicle interior is TR), a potentiometer 27 that detects the opening degree of the air mix door 14, and a potentiometer 27 that detects the opening degree of the air mix door 14. Solar radiation sensor 2 that detects the amount of solar radiation entering
8. Outside air sensor 29 that detects outside air temperature (outside air temperature is T
A), a temperature setting device 3 that sets the temperature inside the vehicle compartment 19
1 (setting temperature is To) are connected, and the analog signals input from these are sent to the microcomputer 23 in place of digital signals. The temperature setting device 31 sets a typical vehicle interior temperature (for example, 25 degrees) by appropriately operating a knob provided on an instrument panel (not shown).
C) something that can be done.

The microcomputer 23 also has a manual switch 3 that instructs whether or not to automatically control the introduction of inside and outside air.
A signal from 3rd grade is input. Based on these input signals, the microcomputer 23 calculates control signals to be output to the aforementioned drive circuits 22a to 22e.

Next, an example of the control operation of the microcomputer 23 will be explained, but since the control of the blower 5, compressor 7, air mix door 14, and mode doors 20a and 20b is the same as in the conventional case, the explanation will be omitted. First, the main routine shown in FIG. 3 will be explained. Explain the control of

Starting from step 40, in step 42, input processing of signals from the solar radiation sensor 28, outside air sensor 29, temperature setting device 31, etc. is performed. The next step 44 is a solar radiation correction routine to be described later, in which the solar radiation correction delay time corresponding to each control area of the total signal T is set and solar radiation correction processing is performed, and based on this correction, the total signal T is Perform the calculation.

In step 46, a total signal T is calculated based on the various data input in step 42 and the data after the solar radiation correction process in step 44. The calculation of which total signal T is generally performed as follows: where TI is the indoor temperature, TA is the outside temperature, To is the set temperature, and T is the solar radiation correction processing value, T=A-T, I +B-T, 10c-To +D -T
, +E (where A, B, C, and D are gain coefficients and E is a constant). In the next step 48, mix door control is performed in accordance with the calculated value of the aforementioned total signal, and the process proceeds to step 50. At step 50, fan control is similarly performed in accordance with the overall signal, and the process proceeds to step 52. In step 52, the compressor is similarly controlled in accordance with the overall signal. The vehicle interior is appropriately air-conditioned through the above three steps, and the process ends at step 54.

Next, the control of the solar radiation correction routine shown in FIG. 4 will be explained.

Starting from step 60, as shown in FIG. 5, it is determined in step 62 whether or not the overall signal T is in the control range A in which the air mix door 14 is brought into a full heat state and the fan of the blower 5 is controlled.

If YES, the process proceeds to step 64 and sets the solar radiation correction delay time (hereinafter referred to as delay time) d to 60 (S!EC); if No, the process proceeds to step 66. Step 66
Then, it is determined whether the overall signal T is within the control range B for both the fan and the air mix door 14.

If YES, proceed to step 68 and set the delay time d to 45
(SEC), and if NO, proceed to step 70. At step 70, the general signal T is air mix door 1.
4, it is determined whether or not it is in the control area C. If YES, proceed to step 72 and set the delay time d to 30 (StIC); if NO, proceed to step 74. In step 74, it is determined whether the overall signal T is within the control range D' that controls both the fan and the intake door 4. If YES, the process proceeds to step 76 and sets the delay time d to 75 (SEC); if NO, the process proceeds to step 78. In step 78, it is determined whether the overall signal T is within the control range for setting the air mix door 14 in a fully cooled state and controlling the fan.

If YES, proceed to step 80 and set the delay time d to 60.
(SIIIC), and if NO, step 82
It is determined whether or not there is solar radiation. If YES, the process proceeds to step 84; if NO, the process returns to the main routine via step 88. In step 84, based on the delay time d set in each step, the solar radiation detection value shown in FIG.
Perform solar radiation correction as shown in . Then step 86
Then, a new total signal T is calculated based on the solar radiation correction, and the process returns to the main routine via step 88.

In addition, in the solar radiation correction using the delay time d shown in FIG. 6(b), for example, the time in the control area B of the fan and air mix door of the general signal T is relatively short, and the control area immediately shifts to the mix door control area C. In such a case, since the delay time d changes, the characteristic line of the solar radiation correction rise becomes a polygonal line, as shown by the dotted line.

In this embodiment, among the various data (indoor temperature TR1, outside temperature TA, etc.) constituting the comprehensive signal T, the delay time d of the solar radiation calculation value T was made different in each control of the comprehensive signal T. Although the case is shown above, when setting other data such as the set temperature T, the delay time (set temperature delay) in controlling each of the blower 5 and the air mix door 14 can be made different as in the above embodiment. can.

Further, even when the outside air temperature TA changes, a delay time (outside air temperature delay) similar to the above can be set.

In this embodiment, the control object of the general signal has been explained limited to the blower 5 and the air mix door 14, but it can also be implemented in controlling other parts such as the intake door 4, the evaporator 6, the mode doors 20a and 20b, etc. It is also possible to have a configuration in which each has its own delay time similar to the example.

(Effects of the Invention) As described above, according to the present invention, the delay time of the solar radiation correction in the fan control area, air mix door control area, and fan/mix door control area of the overall signal is made different, for example, Since the delay time of the fan control area is appropriately longer than the delay time of the air mix door control area, it is possible to improve the air conditioning feeling when solar radiation changes compared to conventional methods. By changing the time, hunting and overshoot can be prevented, and control stability can be achieved.

Furthermore, by setting different delay times for each control area for the outside air temperature and set temperature, which are components of the overall signal, the air conditioning feeling is improved when the outside air temperature changes and when setting the set temperature. It is something that can be done.

[Brief explanation of the drawing]

Fig. 1 is a functional block diagram showing the configuration of the present invention, Fig. 2 is a block diagram showing a vehicle air conditioner according to an embodiment of the invention, and Fig. 3 is a flowchart showing the main routine of the microcomputer used in the above. , FIG. 4 is a flowchart showing the solar radiation correction routine of the microcomputer, FIG. 5 is a characteristic diagram showing the relationship between the overall signal, blower speed, intake door position, and air mix door position, and FIG. 6(a). (b) is an explanatory diagram of solar radiation correction. 4... Intake door, 5... Blower, 6... Evaporator, 14... Air mix door, 15...
Heater core, 20a, 20b...Mode door, 28.
... Solar radiation sensor, 29 ... Outside air sensor, 31 ... Temperature setting device, 100 ... Fluctuation signal detection means, 200 ...
- Input signal correction means, 300... comprehensive signal calculation means,
400...Air conditioner control means. Patent applicant: Diesel Kiki Co., Ltd. Agent Patent attorney Kazuho Onuki

Claims (1)

[Scope of Claims] Comprehensive signal calculation means for calculating a comprehensive signal corresponding to a heat load inside the vehicle interior based on a plurality of input signals including at least a vehicle interior temperature, a set temperature, an outside temperature, and an amount of solar radiation; signal change detection means for detecting that a change has occurred in any of the input signals; and when the signal change detection means detects that a change has occurred in any of the plurality of input signals; input signal correction means for correcting the input signal value that has changed in the calculation of the comprehensive signal calculation means according to the calculation value of the calculation means; 1. An air conditioner for a vehicle, comprising an air conditioner control means for controlling the operation of the air conditioner.