JPS60135316A - Control method and controller for car air conditioner - Google Patents

Abstract

PURPOSE:To properly increase temperature in a car during the primary stage of the starting and to enable prevention of the occurrence of overshoot, by a methed wherein the heating amount of air to be blown in a car room is controlled by means of a control value responding to temperature outside a car. CONSTITUTION:A controller 16 inputs a car room temperature Tr, a temperature Ta outside a car, a temperature Ts responding to solar radiation, a set temperature Td, and an opening theta1 of an air mix door 7 to determine a basic opening theta0=K1Tr+K2Ta+K3Ts-Td+K4 responding to a basic control value and a control value thetax=K5-K6(Ta-25)+K7(Td-25), wherein K1-K2 are a constant. If theta0 is greater than thetax, a control signal for decreasing the opening of the door 7 is sent to an actuator 9, and in the case of thetax>=theta0, ordinary control is effected. If theta0-theta1 is within a given value, the motion of the actuator 9 is brought to an OFF-state, if it exceeds the given value, the door 7 is turned to the cool side or the heating side. This improves comfortableness to passengers, prevents the occurrence of overshoot, and prevents temperature from being uncontrollable.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner for a vehicle, and particularly to a method and device for controlling the temperature of air blown into a vehicle.

In an automatically controlled automobile air conditioner, temperature control is generally performed by adjusting the amount of heating of the air to be blown into the vehicle based on the deviation between the temperature detected inside the vehicle, the temperature detected outside the vehicle, etc., and the set temperature inside the vehicle. However, the temperature outside the car was 5.
If you start the device during the intermediate period between 15°C and 15°C, the temperature inside the car is still low and the difference from the set temperature is large, so it will reach the maximum heating state where the heating amount is the largest, and the temperature inside the car will suddenly increase. This raises the temperature, causing discomfort to the occupants, and the amount of heating is too large, causing an overshoot in which the temperature temporarily exceeds the set temperature. Therefore, in the past, for example, as shown in Japanese Patent Application Laid-Open No. 58-22711, when starting up in the intermediate period,
It has been proposed to regulate the amount of heating to a constant value so as not to reach the maximum heating state.

However, in such a conventional example, since the regulation value of the amount of heating is constant, if the regulation value is set too small, the heating amount will increase when the outside temperature is relatively low, such as when the temperature outside the vehicle is at the lower limit of the intermediate period. If the amount is too small, the temperature inside the car will not approach the set temperature and temperature control will become impossible, and if the regulation value is set too high, the temperature outside the car will be relatively high, such as when the upper limit is reached during the intermediate period. However, the heating amount was too large, causing the same problems as mentioned above, and the heating amount regulation value could not be set in a well-balanced manner.

Therefore, the present invention focuses on the fact that the regulation value for the amount of heating should be changed depending on the temperature inside the vehicle, and aims to solve the above-mentioned conventional drawbacks and appropriately regulate the amount of heating.

Therefore, the first gist of the present invention is as follows.

A basic control value is calculated based on at least a detected temperature inside the vehicle and a set temperature inside the vehicle, and a regulation value is calculated based on at least a detected temperature outside the vehicle and the set temperature inside the vehicle, and the basic control value is regulated by this regulation value. The present invention provides a control method for an automobile air conditioner that adjusts the amount of heat to be blown into a vehicle based on a value.

The second gist of the present invention relates to an apparatus for implementing the above method, which includes a vehicle interior temperature sensor 17 for detecting the interior temperature of the vehicle, and a temperature setting device for setting the interior temperature of the vehicle, as shown in FIG. 20, and an exterior temperature sensor 18 for detecting the temperature outside the vehicle. Further, a basic control value is calculated by the basic control value calculation means 4o according to the outputs of the inside temperature sensor 17 and the temperature setting device 20, and a regulation value is calculated according to the outputs from the temperature setting device 20 and the outside temperature sensor 18. Arithmetic means 5
It is calculated by O. Then, in the control signal generation means 60, the basic control value calculation means 40
The calculated value of is regulated by the calculation result of the regulation value calculation means 5o, and the value is output as a control signal, and the heating amount adjustment means 10
This adjusts the amount of heating of the air that should be blown into the car.

Therefore, since the regulation value of the amount of heating can be changed according to changes in the temperature outside the vehicle, the temperature inside the vehicle can also be increased at an appropriate rate according to the outside temperature, thereby achieving the above object.

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

In Fig. 2, an air conditioner for an automobile is formed with an inside air inlet 2 and an outside air inlet 3 divided into two on the most upstream side of a ventilation duct 1, and an inside/outside air switching door 4 is installed in the divided part. By opening and closing the inside/outside air switching door 4, the air to be introduced into the ventilation duct 1 can be selected between inside air and outside air.

The blower 5 is for sucking air into the ventilation duct 1 and sending it to the downstream side.An evaporator 6 is disposed on the downstream side of this blower 5, and the following is arranged on the downstream side of this evaporator '6. An air mix door 7 and a heater core 8 are arranged.

The air mix door 7 adjusts the ratio of air sent to the heater core 8 and air bypassing the heater core 8 according to its opening degree ol, and is operated by actuating an actuator 9. and the actuator 9 constitute a heating amount adjusting means 10,
The heating amount of this heating amount adjusting means 10 is determined by the heating amount of the air mix door 7.
It is indicated by the opening degree of 01. The heating amount adjusting means 1° includes the air mix door 7 in this embodiment, but in other embodiments, the heating amount may be adjusted by a water cock that determines the amount of hot water sent to the heater core 8. Alternatively, the air mix door and the water cock may be linked together.

The air whose heating amount has been adjusted by the heating amount adjusting means 10 is blown into the vehicle through the upper air outlet 11, the lower air outlet 12, or the defrost air outlet 13 that open into the vehicle interior. Opening/closing is mode door 14.15
This is done to obtain the desired blowing mode.

In the control device main body 16, the inside temperature Tr from the inside temperature sensor 17 which detects the inside temperature of the car - the outside temperature Ta from the outside temperature sensor 18 which detects the outside temperature of the car.

Temperature Ts corresponding to the amount of solar radiation from the solar radiation sensor 19 that detects the amount of solar radiation - Set temperature Td + from the temperature setting device 20 that sets the interior temperature of the vehicle, and Opening from the potentiometer 21 that detects the opening degree of the air mix door 7. Degree θ1 is input. Each of the sensors 17 to 19 is composed of a heat sensitive element such as a thermistor.

The temperature setting device 20 is composed of a variable resistor and is operated by a passenger, and the potentiometer 21 is provided on the actuator 9. This control device main body 16
, each input signal is operationally amplified to obtain a control signal, and this control signal is output to the actuator 9 to control the opening degree of the air mix door 7, that is, the amount of heating of the air to be blown into the vehicle interior. It has become.

In FIG. 3, an example of the operation of the control device main body 16 is shown as a flowchart.
1, the input signals of the vehicle interior temperature Tr, vehicle exterior temperature Ta, temperature Ts corresponding to the amount of solar radiation, set temperature Td, and opening degree 0I are input.

Then, in the next step 102, a basic opening degree θ0 corresponding to the basic control value is calculated according to, for example, equation (1) below.

θa = K 1 Tr+ 2 Ta+ 3 Ts-Td+
K4-...(1) However, 4 is a constant in K1-.

In addition, in the next step 103, the following (2)
The regulation value θX is calculated according to the formula.

θx = K 6- (K 5 (Ta-25) - K 7 (
Td-25)) (2) However, K5~7 is a constant.

In the next step 104, the basic opening degree θO and the regulation value θX are compared, and if θ0>θX, the amount of heating is too large, so the process proceeds to step 107 and the actuator 9 is given "C00L". A control signal is output to reduce the opening degree of the air mix door 7. On the other hand, θ
If X≧00, the amount of heating is not too large, so normal control is performed. That is, the process proceeds to step 105, where the basic opening degree θ0 and the fed-back actual opening g are determined.
It is determined whether or not the supply value of the difference from 0+ is within a predetermined value E, and if it is within a predetermined value ε, the process proceeds to step 109 and a control signal of ``OFF'' is output to the actuator 9. The movement of the air mix door 7 is stopped. On the other hand, if it is determined that the opening degree is not within the predetermined value E, the process proceeds to step 106 and it is determined whether the difference between the basic opening degree 0o and the actual opening degree θ1 is larger than the predetermined value 0. If it is smaller than the predetermined value 0, the air mix door 7 has shifted to the heat side, so proceed to step 107. If it is larger than the predetermined value, the air mix door 7 has shifted to the cool side, so proceed to step 107.
Proceeding to step 08, a control signal of 'HEAT' is output to the actuator 9, and the air mix door 7 is moved to the heat side.When steps 107 to 109 are completed, a return step 110 returns to step 101.
The control is then returned to Ii.

In FIG. 4, a specific circuit example of the control device main body 16 is shown, in which 17 to 19 are the sensors, 20 are the temperature setters, 21 are the potentiometers, 22 to 26 are operational amplifiers, and 27 to 30 are transistors. , 31 is a motor of the actuator.

Therefore, the first operational amplifier 22 performs the calculation corresponding to the above formula (1), and the output v0 of the first operational amplifier 22 corresponds to the basic opening degree θ0, and the basic opening degree θ0 corresponds to the basic opening degree θ0. It constitutes a control value calculation means 40. Further, the second operational amplifier 23 performs an operation corresponding to equation (2), and the output Vx of the second operational amplifier 23 corresponds to the regulation value θX, and the regulation value calculation shown in FIG. It constitutes means 50. The output terminal of the second operational amplifier 23 is connected to the inverting input terminal of the third operational amplifier 24 via the diode 32, and the inverting input terminal of the third operational amplifier 24 When , the diode 33 is off, so it corresponds to the voltage Vx of the second operational amplifier 23, but when Vx>Vo, the diode 32 is off, so it corresponds to vo. And this third operational amplifier 2
The output V of No. 4 is determined by the relationship with the output of potentiometer 21, and the output V of No. 4 is determined by the relationship with the output of potentiometer 21.
are input to the operational amplifiers 25 and 26 of the reference voltages Vl, V
2 to determine a control signal, and constitutes the control signal generating means 60 shown in FIG. That is, when Vl>V2>V, the output of the fourth operational amplifier 25 becomes L''' and the output of the fifth operational amplifier 26 becomes DHII, so the transistors 27 and 30 are turned on and the motor 31 is turned on. When Vl>V>V2, the outputs of the fourth and fifth operational amplifiers 25 and 26 are "L" and the air mix door is moved to the cool side.
, 30 are turned off, the motor 31 stops, and V>Vl>
When it was V2.

Since the output of the fourth operational amplifier 25 is 11 HII and the output of the fifth operational amplifier 26 is y L n, the transistors 28 and 29 are turned on to reverse the motor 3I and turn the air mix door to the heat side. move to

Therefore, when the output voltage v0 of the first operational amplifier 22 exceeds the output voltage Vx of the second operational amplifier 23, the output Vx of the second operational amplifier 23 is input to the inverting input terminal of the third operational amplifier 24. is applied, and the air mix door stops at a position regulated by Vx. That is, the second operational amplifier 2 is determined by the outputs of the temperature setting device 2O and the vehicle external temperature sensor 18.
The opening degree of the air mix door is regulated by the output Vx of No. 3.

In the above embodiment, the set temperature Td and the vehicle exterior temperature Ta are input to the regulation value calculation means 50, but the temperature Ts corresponding to the amount of solar radiation may be added to the input.

Further, the regulation by the regulation value calculation means 50 is performed by the upper air outlet 11.
It may be enabled only in the open pipe level mode or vent mode, and the restriction may be canceled in other cases, or it may be activated only within a predetermined time from the time of activation. Since it is well known from No. 1, detailed explanation thereof will be omitted. Furthermore, it goes without saying that a microcomputer can be used for the control device main body 16.

As described above, according to the present invention, the amount of heating of the air to be blown into the interior of the vehicle is regulated by a regulation value that corresponds to the temperature outside the vehicle, so that the increase in temperature inside the vehicle at the initial stage of startup can be kept to a moderate level. This can improve passenger comfort, prevent overshoot, and prevent temperature control from becoming impossible.

[Brief explanation of drawings]

FIG. 1 is a planting diagram according to the present invention, FIG. 2 is a construction diagram according to an embodiment of the present invention, FIG. 3 is a flowchart showing an example of the operation of the control device main body used in the above, and FIG. FIG. 3 is a circuit diagram of the main body of the control device used in the same as above. DESCRIPTION OF SYMBOLS 10... Heating amount adjustment means, 17... Vehicle interior temperature sensor, 18... Vehicle exterior temperature sensor, 2o... Temperature setting device,
4o: Basic control value calculation means, 50: Regulation value calculation means, 60: Control signal generation means, Tr: Vehicle interior temperature, Ta: Vehicle exterior temperature, Td: Set temperature. Patent applicant: Diesel Kiki Co., Ltd. Procedural amendment (voluntary) February 2-1, 1982 Patent application No. 241625 2 Title of invention Control method and control device for automobile air conditioner 3 Amendment Patent applicant 4, agent 6, Detailed description of the invention in the specification subject to amendment Figure 7, Contents of amendment (1) Specification, page 4, line 6, f Vehicle interior temperature " is corrected to "temperature outside the vehicle." (2) From the 1st line of page 9 to the 6th line of page 10, the following steps are carried out in step 104. '' should be corrected as shown in the attached sheet. (3) Correct Figure 3 as shown in the attached sheet. In the next step 104, the basic opening degree θ0 and the regulation value θX are compared, and if θX≧00, the heating amount is not too large, so normal control is performed. That is, proceeding to the next step 105, the absolute value of the difference between the basic opening θ0 and the fed-back actual opening θ1 is determined as the predetermined value E.
If it is within a predetermined value ε, there is no need to move the air mix door 7, so step 111
The process proceeds to step 106 and outputs a control signal of 'OFF'' to the actuator 9 to stop the movement of the air mix door 7. On the other hand, if it is determined that the value is not within the predetermined value ε, the process proceeds to the next step 106. It is determined whether the difference between the basic opening degree θ0 and the actual opening degree θ] is larger than a predetermined value 0, that is, in which direction the air mix door 7 is deviated.It is smaller than the predetermined value 0. If so, the air mix door 7 is shifted toward the heat side, so the process proceeds to step 109, and a control signal of "C00L'" is output to the actuator 9 to move the air mix door 7 toward the cool side, while the predetermined value 0 is output. If it is larger than , the air mix door 7 has shifted toward the cool side, so the process proceeds to step 110, where a control signal of "HEAT" is output to the actuator 9 to move the air mix door 7 toward the heat side. If it is determined in step 104 that 00>θX, the amount of heating is too large if normal control is performed, so control is performed to restrict the opening degree of the air mix door 7.In other words, in this case, the next step Proceed to step 107, and the absolute value of the difference between the regulation value θX and the actual opening degree 01 is determined as the predetermined value C.
If it is within a predetermined value ε, it can be considered that the regulation has already been carried out, so the process proceeds to step 111 and outputs an "OFF" control signal to the actuator 9. On the other hand, if it is determined that it is not within the predetermined value ε, 1
Proceed to the next step 108 and set the regulation value θX and the actual opening θ.
1 is larger than a predetermined value 0, that is, it is determined in which direction the air mix door 7 is deviated. If it is smaller than the predetermined value 0, the air mix door 7 is shifted toward the heat side with respect to the regulation value θX, so the process goes to step 109. If it is larger than the predetermined value 0, the air mix door 7 is shifted to the heat side with respect to the regulation value θX. Since the deviation is toward the cool side with respect to θX, the process proceeds to step 110. Then, when the processing of steps 109 to 111 is completed, the process is returned to the step 101 by a return step 112,
Such control is performed cyclically. Figure 3 Procedural Amendment (Method) % Formula % The simple explanation of the control method and drawing of the control device for automobile air conditioners is amended as follows. ``Figure 1 is a block diagram according to the present invention, Figure 2 is a block diagram according to an embodiment of the present invention, Figure 3 is a flowchart showing an example of the operation of the main body of the control device used in the above, and Figure 4 is the same as above. This is a circuit diagram of the main body of the control device used.

Claims (1)

[Claims] ■ At least the detected temperature inside the vehicle and the set temperature inside the vehicle: 3
A basic control value is calculated based on this, and a regulation value is calculated based on at least the temperature detected outside the vehicle and the set temperature inside the vehicle, and the air to be blown into the interior of the vehicle is calculated based on the regulation value that regulates the basic control value. A method for controlling an automotive air conditioner, the method comprising adjusting the amount of heating. 2. The method of controlling an air conditioner for an automobile according to claim 1, wherein the amount of heating is indicated by the opening degree of the air mix door. 3. A vehicle interior temperature sensor that detects the vehicle interior temperature, a temperature setting device that sets the vehicle interior temperature, a vehicle exterior temperature sensor that detects the vehicle exterior temperature, and a basic control value according to the outputs from at least the vehicle interior temperature sensor and the temperature setting device. basic control value calculation means for calculating the regulation value; regulation value calculation means for computing the regulation value according to outputs from at least the temperature setting device and the vehicle exterior temperature sensor; A control signal generating means for generating a control signal that regulates the calculated value of the calculating means; and a heating amount adjusting means for adjusting the heating amount of the air to be blown into the vehicle according to the output of the control signal generating means. A control device for an automotive air conditioner, characterized by: 4. The control device for an air conditioner for an automobile according to claim 3, wherein the heating amount adjusting means includes an air mix door.