JPS60174311A - Controller for car air-conditioner - Google Patents

Abstract

PURPOSE:To selectively permit the setting of an aimed temperature to suspend immediately before a limit value or to be varied continuously by installing a means for renewing the data indicating the aimed temperature to the limit value and a judging means for suspending the renewal when the set value immediately before a limit value is reached. CONSTITUTION:When a temperature lowering switch 34c is continuously operated, and the aimed temperature tset of a RAM reaches the value immediately before a lower limit value, the aimed temperature data tset is not counted- down. Therefore, even if the switch 34c is continuously operated, the aimed temperature data tset does not reach the lower limit value 18 deg.C. However, when the temporary operation is suspended and the operation is carried-out again, tset is counted-down, judging that the aimed temperature data tset is not at the lower limit value. Thus, the aimed temperature can be varied until the time when the indication of 18.5 deg.C immediately before the limit value is reached, by the operation of the temperature varying switch, and the temporary stop immediately before the limit value is permitted, and the state in which the max. cooling or warming is inadvertently realized is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a car air conditioner control device that is equipped with a temperature control means that automatically adjusts the temperature of air supplied into a vehicle interior. This invention relates to a car air conditioner control device that can be changed.

[Prior art]

In this type of device, in order to easily change the adjusted temperature, it is possible to change the target temperature by operating a switch, for example in Japanese Patent Application Laid-Open No. 57-15511.
This method is known from Publication No. 7 and Publication No. G of Japanese Utility Model Application No. 57-25015. According to the known example, data indicating the target temperature continues to be updated while the switch operation continues. Since the data is continuously updated until the limit value is reached, there is a problem in that the amount of adjustment by the salinity adjusting means changes rapidly the moment the limit value is reached.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a car air conditioner control device that allows the user to select whether to stop the target temperature just before the limit value or to change the target temperature to the limit value when setting the target temperature without impairing operability. It is to be.

[Summary of the structure of the invention]

In order to achieve the above object, the present invention is characterized in that it is constructed as shown in FIG.

That is, the temperature adjusting means S2 adjusts the temperature of the air supplied into the vehicle interior S1 in response to a control signal, and the temperature adjusting means S2 is controlled according to the difference between the actual room temperature and the target temperature. , a car air conditioner control device comprising a control means S3 that controls the temperature adjustment means to a predetermined state when the target temperature is a preset limit value, which is operated when raising or lowering the target temperature; In response to the operation signals of the temperature change switch S4 and the control switch S4, which generate operation signals, the target value data indicating the target temperature is changed to the limit value while the operation signal continues to be generated. a data updating means S5 for updating in the upward or downward direction until the limit value is reached; A determining means S6 for temporarily suspending updating of the target value in the data changing means S5;

Note that the control means S3, the updating means S5, and the determining means S
6 can be configured by a microcomputer.

〔Example〕

The present invention will be described below with reference to an embodiment shown in FIG. In this embodiment, the present invention is applied to a generally known automobile air conditioner using a cold air/warm air mixing method. Certain outside air intake ports, lb and lb' are inside air intake ports, 2
Reference characters a and 2b are internal and external air switching dampers that open and close both the suction ports La and lb (lb'), and 3a and 3b are internal and external air switching dampers la.

A diaphragm actuator for opening and closing 1b (lb'), 4
a, , 4b are electromagnetic valves, 5 is a blower motor, 6 is a refrigerant evaporator of the refrigeration cycle, 7 is an expansion valve, 8 is a liquid receiver, 9 is a condenser, 10 is a compressor, which is Driven by a vehicle engine 12, these devices (7 to 1
1) and the evaporator 6 constitute a refrigeration cycle.

Reference numeral 13 denotes a heater using engine cooling water as a heat source, which is provided in series in the ventilation duct 15 downstream of the evaporator 6, and is controlled by a solenoid valve 14. 16 is a temperature adjustment damper,
The amount of heating by the heater 13 is adjusted by adjusting the ratio of air passing through the heater 13 to air passing through the bias passage 17 by 1 PII.

Reference numeral 18 denotes a heating outlet, which blows warm air toward the passenger's feet in the vehicle interior. Reference numeral 19 denotes a differential air outlet, which blows warm air toward the front window glass. 20 is a cooling outlet;
It blows cold air toward the upper body of the occupant inside the vehicle. 21a, 21b, 21C are the air outlet 1B, 19.2
2ia is a heating switching damper, 21b and 21G are differential and cooling switching dampers, 22a is a diaphragm actuator that opens and closes the air outlet switching damper 21a, and 22b is an air outlet switching damper 21b. ,
Diaphragm actuator for opening and closing 21C, 23'a, 2
3b is a solenoid valve.

24 is a diaphragm actuator that opens and closes the temperature adjustment damper 16; 25 is a negative pressure regulator that adjusts the negative pressure supplied to the diaphragm actuator 24; By valves 26 and 27 "ζ Negative pressure pipe 2
8 and the atmosphere opening 29 are opened and closed, respectively. The intake negative pressure of the automobile engine is applied to the negative pressure pipe 28.

In FIG. 2 showing the electrical system, numeral 40 is a computer for controlling various operating modes, temperature, inlet and outlet, and receives various information signals and processes them based on a preset control program. Execute the above codes 4a, 4b, 5゜7.14.23a, 23b, 26
．． It electrically commands the operation of 27 functional elements.

34 is a panel including various mode switches, a fluorescent display 34a that displays the target temperature, temperature change switches 34b and 34c that raise and lower the set temperature, 35 is a driver for the blower motor 5, 36 is a power supply circuit, and 33 is various sensors. (
Inside air sensor, outside air sensor, solar radiation sensor, post-evaporation sensor,
32 is an A/D conversion circuit that converts the signals of water temperature sensor, potentiometer) 32 into digital values, 31 is a microcomputer (hereinafter referred to as CPU) with a built-in control program, and a driver for water pulp, heater relay, M g c relay). be.

37 is an ignition switch for an automobile engine, 3
8 is an in-vehicle battery.

The CPU 31 receives the sensor 32 signal converted by the A/D conversion circuit 33 and the control panel 34 signal. The CPtJ31 performs data processing and calculations based on the received signals, and controls the actuator and blower.

This control is performed at regular intervals according to a circulation control program schematically shown in FIG. In this control program, in the setting change routine, the target temperature set in RAM (internal memory) is changed to the temperature change switch 34 b, 34
A count amp or countdown is performed according to the operation state of c, and room temperature control is performed using the changed target temperature, and the target temperature is displayed on the display 34a.

FIG. 4 shows details of the temperature change routine.

Although FIG. 4 shows a temperature drop, a temperature rise is also shown in the same way.

In step 101 of the temperature change routine, it is determined whether the temperature reduction switch 34C has been operated, and step 10
In step 2, it is determined whether the operation continues. Step 1
A flag stored in RAM can be used to determine 02.

Next, in step 103, the RAM target temperature data Tse
1- has reached a preset value immediately before the lower limit (equivalent to 18.5° C.). If this operation has been performed, step 103 is executed. If the determination result in step 103 is "NO", steps 104 and 105 are processed, but if the determination is "YES", step 1 is processed.
Processing of 05 is bused. In other words, the target temperature data Tse
T is not counted down. Therefore, switch 34c
Even if you continue to operate the target temperature data Tse7, the lower limit value (1
8.0℃).

However, if the operation is not continuous but is temporarily interrupted and the operation is performed again, the process in step 103 is passed, and in step 104 it is determined that the target temperature data 7 s e 7 is not the lower limit value. , in step 105, the target temperature data 'I'Se' is counted down.

In the room temperature control routine shown in FIG.
operates the actuator so that the room temperature is maintained at the target temperature data '1'' s e 1-. In this case, the room temperature control routine is as described in the description of the prior art.
It is determined whether the target temperature Tse7 has reached the limit value, and depending on the determination result, it is switched whether to perform continuous temperature adjustment or maximum cooling control.

Thus, in the present invention, the target temperature can be changed continuously until the displayed temperature reaches 18.5°C, which is just before the limit value, and can be temporarily stopped just before the temperature change switch is operated. ing. In order to further enable maximum cooling control, it is sufficient to temporarily suspend and restart the switch operation. Therefore, this device does not reach the maximum cooling control inadvertently. This also applies to the case where maximum heating control is performed when the target temperature data does not reach the upper limit value.

In addition, in the embodiment described above, the target temperature data Tsc
We have explained the case where the temperature changes proportionally until it reaches the limit value (equivalent to 18.0℃) by operating a switch.
The present invention also includes the following embodiments. Zunawaji, the target temperature data 'l゛Se7 is composed of a pure temperature data part and a sign part, and the pure temperature data part is made to change up to the limit value according to the switch operation, and furthermore, it is made to change between the limit value and just before the limit value. and the same value (for example, 18.0℃
), and on the other hand, the sign part may be changed between just before the limit value and the limit value. This code indicates maximum cooling or maximum heating, and this code may be used to display whether or not the maximum cooling is being performed on the display 34a. For example, just before the limit value, the target temperature data in CP, U31 is expressed as "1B, 0-0", and at the limit value, it is expressed as "18°0-1", and at this time, the display 34a "18.0℃" and "18.0℃-" respectively.
MAX" may be displayed.

〔Effect of the invention〕

As described above, according to the present invention, the target temperature setting and the maximum cooling or maximum heating setting can be easily selected using a common switch.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a car air conditioner to which an embodiment of the present invention is applied, Fig. 2 is an electrical wiring diagram of an embodiment of the invention, and Figs. 3 and 4 are diagrams of a control program applied to the device. The flowchart, FIG. 5, is a functional block diagram of the present invention. 34b, 34c...A temperature increase switch and an up/down switch forming a temperature change switch, 31...A microcomputer (CF) including a data update means and a determination means.
U). Representative Patent Attorney Takashi OkabeFigure 2Figure 3

Claims (1)

[Scope of Claims] Salinity regulating means for regulating the temperature of the air supplied into the vehicle interior in °C in response to control (a-;), and said temperature regulating means in response to the difference between the actual room temperature and the target temperature. In a car air conditioner control device, the car air conditioner control device is provided with a control means that controls the temperature adjustment means to a predetermined state when the target salinity is a preset limit value, when raising or lowering the target temperature. 1 made by ゛C
While one operation continues to be performed, the temperature change switch that generates the operation, and the response to the switch iQ of this switch, and the target value data indicating the target temperature while the operation signal is being generated.
data updating means for updating in the upward or downward direction until reaching the limit value, and the data in the data updating means reaches a preset value immediately before the limit value, and the operation signal is continuously generated. and a determining means for temporarily suspending updating of the target value in the data changing means when the data changing means is running.