JPH0314718A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To simplify imputting of a control parameter and reduce the number of components by storing data from a switch for setting a required room air conditioning temperature as the control parameter when the mode of operation is changed from temperature setting to control parameter setting. CONSTITUTION:A required air conditioning temperature is set with a switch 51 and the set data is displayed with means 52. Data required for the air conditioning is detected with a sensor 53. Data from the switch 51 and from the sensor 53 are operated with means 54. An air conditioner 55 is controlled with means 56 based on the data operation result. While the mode of operation is changed from temperature setting mode to control parameter setting mode, the mode change is discriminated with means 58. At the time of the discrimination, the data from the switch 51 is inputted as a control parameter with a circuit 60 and stored in means 59. Thereafter the data is operated with the means 54 according to the control parameter stored.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a microcombinator-controlled vehicle air conditioner in which control constants can be easily changed.

[Conventional technology] In general, as shown in FIG. 6, a vehicle air conditioner includes an inside/outside air switching door 1 provided on the upstream side of a duct D, a blower 2 and an evaporator provided sequentially toward the downstream side. 3. Heater core 4, air mix door 5 that adjusts the mixing ratio of cold air and warm air, and control unit 6
It is equipped with

Then, a control unit 6 including a microcomputer calculates input data such as the set temperature Td set by the temperature setting device 7, the detected value Tr of the inside air sensor 8, and the detected value Ta of the outside air sensor 9. By processing, a comprehensive signal T is calculated, and based on this comprehensive signal T, each actuator 1 of the air conditioning equipment, that is, the blower 2, the evaporator 3, the heater core 4, and the air minnow door 5 is activated.
0, 1l, and 12 are controlled to bring the temperature inside the car closer to the set temperature.

Here, in calculating the above-mentioned total signal T, a predetermined calculation formula previously stored in the ROM (storage means) of the microcomputer is used.

However, since the characteristics of air conditioning equipment differ depending on the model,
The control constants in the calculation formula must be different depending on the model. Conventionally, when storing arithmetic expressions including control constants in a ROM, a ROM is manufactured for each model and incorporated into a microcomputer. However, this method requires different ROMs for each model, increasing manufacturing costs.

Therefore, a method has been developed in which only basic arithmetic expressions that do not specify control constants are stored in the ROM, and the control constants are provided by data from an externally connected adjustment element. This method, as shown in Japanese Patent Application Laid-Open No. 63-2582-1, connects a control constant setting element such as a resistor to a control unit, converts the analog voltage given by the setting element into digital form, and converts it into a digital signal. Import it into the microcomputer as a value. Then, an arithmetic expression is completed using the captured data as a control constant, and arithmetic processing is performed on the input data.

[Problems to be Solved by the Invention] However, in the conventional method described above, when there are a large number of control constants, a corresponding number of multiplexers and setting elements are required, resulting in a problem that the cost is high and a large space is required.

[Means for Solving the Problems] In order to solve the above problems, the air conditioner of the present invention has the following features:
As shown in FIG. 1, a temperature setting switch 51 for manually setting a desired in-vehicle air conditioner crystallinity;
display means 52 for displaying data input by;
A sensor 53 that collects data necessary for air conditioning control, a calculation means 54 that processes the input data from the temperature setting switch 51 and the sensor 53, and an air conditioning equipment 55 that controls the air conditioning equipment 55 based on the calculation value of the calculation means 54. A control means 56 for thereby bringing the temperature inside the vehicle closer to the set temperature set by the temperature setting switch 51, and a mode changeover switch 57 for switching from the temperature setting mode to the control constant setting mode, and a control constant setting mode. A mode determining means 58 for determining whether the mode has been switched to the setting mode, and an input circuit for inputting the input data of the temperature setting switch 5 or 5 to the storage means 59 as a control constant when the mode determining means 58 outputs a determination signal. 60.

The arithmetic means 54 is configured to perform arithmetic processing on the human data using the control constants stored in the storage means 59.

[Operation] In the air conditioner having the above configuration, when setting the control constant, first operate the mode changeover switch 57. If the control constant setting mode is selected by the operation, the mode determining means 58 determines this and issues a determination signal. In this state, the temperature setting switch 51 is
Operate while looking at 2. Then, the displayed value is made to match a value corresponding to a predetermined control constant. Thereby, the input circuit 60 stores the value as a control constant in the storage device S9.

Next, the control constant setting mode is canceled to enter the temperature setting mode, and in this state, the temperature setting switch 51 is used to set the temperature. Then, the calculation means 54 performs calculation processing based on the detected values of each sensor 53 and the set temperature input by the temperature setting switch 51. During this arithmetic processing, the arithmetic means 54 completes the arithmetic expression using the control constants stored in the storage device 59, performs arithmetic processing using this completed arithmetic expression, and calculates the total signal T. Then, based on the comprehensive signal T, the control means 56 controls the air conditioning equipment 55 such as a blower and various actuators, and as a result, the temperature inside the vehicle approaches the set temperature.

[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 2 shows a schematic configuration of the control system of the embodiment device. 70 is a microcomputer that forms the center of the control unit, and this microcomputer 70 includes an UP switch 71 for increasing the set temperature provided on the operation panel;
DOWN switch 72 for lowering, FAN OFF
Switch (switch to turn off the blower) 73, AUT
Operation signals are input from the O switch 74, the FOOT switch 75 for air outlet selection, and the VENT switch 76, respectively. In addition, an inside air sensor 8 that detects the inside temperature of the car
1. Detection signals are manually inputted from an outside air sensor 82 that detects the outside air temperature and a solar radiation sensor 83 that detects the amount of solar radiation via a multiplexer 85 and an A/D converter 86, respectively. In addition, operation signals from other operation switches and sensors,
A detection signal is input, but will be omitted in the description of this embodiment. Note that the switches 71 to 76 are all push button type switches.

The microcomputer 70 causes the digital display 90 to display input data in response to operation signals from an UP switch 71 and a DOWN switch 72 for temperature setting. and,
While looking at the displayed value, the operator presses the switches 7l and 72.
By turning ON and fixing the displayed value to the desired value,
The displayed value is taken as the set temperature.

Further, this microcomputer 70 includes a ROM 70A as a read-only storage means and an E″FR as a writable storage means that retains the memory contents even after the power is turned off.
OM70B, and ROM70A contains the basic calculation formula T=Tr+K+Ta+KtTs+K3Td+K4 (where T=total signal, Tr=detected value of internal air sensor 8, Ta) which does not specify control constants K, -K,
= detection value of the outside air sensor 82, Ts = detection value of the solar radiation sensor, and Td = temperature setting value. ) is stored in the predetermined area of the E"FROM70B, and a basic control constant that is a reference value of the control constants K, ~K4 in the above formula is stored. Also, the above basic control constant is stored in the E"FROM7OB. An area is reserved for storing new control constants.

Then, the microcomputer 70 has an E'PROM7
If a new control constant is registered in 0B, complete the above calculation formula using the new control constant, and if no new control constant is given, complete the calculation formula using the basic control constant. Using the completed calculation formula, calculation processing is performed based on the detected value Tr of the inside air sensor 81, the detected value Ta of the outside air sensor 82, the detected value Ts of the solar radiation sensor 83, and the temperature setting value Td, and the total signal T Calculate. Furthermore, based on the overall signal T, the rotation speed of the blower 9l is calculated and the blower 9l is controlled, and the target value of the air conditioning equipment such as the air mix door is calculated and each actuator type 2 92 of the air conditioning equipment is controlled. do. Note that drive circuits 95, 96, and 97 are provided between the digital display 90, the blower 9l, the actuator 92, and the microcomputer 70.

The above are the functions for normal control, and the device of this embodiment selects a control constant setting mode other than the above normal control mode (which includes temperature setting mode), and sets the control constants arbitrarily. It also has the function of In that case, the operation signals are the IG (ignition) switch (not shown), the FAN
OFF switch 73, AUTO switch 74, FOOT
switch 75, vENT switch 76, array i. :．
It is provided by an UP switch 71 and a DOWN switch 72. Further, the microcomputer 70 is provided with functions corresponding to the input circuit 60 and mode determination means 58 in FIG. 1 described above.

Next, the content of control by the microcomputer 70 is as follows.
This will be explained based on the flowcharts shown in FIGS. 3 to 5.

As shown in Figure 3, after the microcomputer program starts, turn the IC switch from OFF to ON.
and turn off the fan within a certain period of time after turning on the IG switch.
Keep pressing the F switch 73 for 5 seconds or more (step 101
, 102). Then you will enter control constant setting mode (
Step 103).

To enter the control constant setting mode, turn off the IG switch (Step 104) or turn on the AUT○ switch 74 (
At step l05), the control is canceled and normal control is entered (step 106).

As the control constant setting mode, four modes are prepared as shown in FIG. The first mode is a set temperature gain (control constant K3) setting mode (step 201). When the control constant setting mode is selected, this mode is entered first. The second mode is the gain (control constant K,) setting mode (step 202) of the outside air sensor 82, and the third mode is the gain (control constant K2) of the solar radiation sensor 83.
The fourth setting mode is the overall signal adjustment value (control constant K.) setting mode (step 204).

When it is desired to sequentially switch from the first mode to the fourth mode, the FOOT switch 75 is turned on each time. In addition, if you want to switch sequentially in the opposite direction, use the VENT switch 7.
Turn on 6 each time. Then, the modes will change sequentially.

In each mode, control constants are set in almost the same way. Hereinafter, as a typical example, the procedure for setting the set temperature gain will be explained using FIG. 5.

When the set temperature gain setting mode is selected, the CPU first checks whether the control constants have been changed in the past.
makes a judgment (step 301).

If there is no past history, the basic control constants stored in the E2FROM 70B are displayed on the digital display 90 (
Step 302). Furthermore, if there is a history, the stored value of the control constant is displayed (Sutesof 303). Then, change operations are performed based on this value.

To change the temperature, press UP switch 71 for temperature setting, DOWN
This is done by the switch 72. If you want to increase the displayed value, press the UP switch 71 to increase the display by 0.1 (
Stenop 304, 305).

If you want to decrease the displayed value, press the DOWN switch 72 to lower the display by 0.1 (step 306).
, 307). Perform the above operation to make the displayed numerical value match the predetermined numerical value.

Once they match, press the VENT switch 76 or F○OT switch 75. Then, the displayed value is stored as a control constant in a predetermined area of the E'FROM 70B (steps 308, 309, 310, 311). If there is a previous stored value, it is updated.

Then, setting or changing the set temperature gain becomes difficult.

After that, if you want to move to another gain setting mode, use the fourth
As shown in the figure, it can be moved by further pressing the FOOT switch 75 or the VENT switch 76. Further, if it is desired to return from the control constant setting mode to the normal control mode, the AUT◯ switch 105 is pressed as shown in FIG. Then you can move to normal control.

In this way, in the air conditioner of the embodiment, control constants can be easily set or changed by operating the switches on the existing operation panel under predetermined conditions. Therefore, there is no need for an externally connected adjustment element or a multiplexer for reading data from the element.

In addition, in the above embodiment, an example was shown where the sensor gain is set as a control constant, but in the same way, the inflection point of the control pattern of the blower or the control pattern of the air mix door can be set as the control constant. You can do it like this.

[Effects of the Invention] As explained above, according to the air conditioner of the present invention,
Control constants can be easily input by operating the temperature setting switch. Therefore, there is no need for an externally connected setting element, and especially when there are many control constants to be set, there is no need for a multiplexer either, so that cost and space savings can be achieved.

[Brief explanation of drawings]

Fig. 1 is a Bronok diagram showing the configuration of the present invention, Fig. 2 is a Bronok diagram showing an embodiment of the invention, Figs. 1 is a schematic configuration diagram showing the general configuration of an air conditioner according to the present invention. 51...Temperature setting switch, 52...
Display means, 53...Sensor, 54...
Calculating means, 55... Air conditioning equipment, 56...
- Control means, 57...Mode selection switch, 5
8...mode determination means, 59...memory means, 60...input circuit, 70...microcomputer, 71... Temperature setting UP
Switch, 72...DOWN switch for temperature setting.

Claims (1)

[Scope of Claims] A temperature setting switch for manually setting a desired in-vehicle air conditioning temperature, a display means for displaying data input by the temperature setting switch, a sensor for collecting data necessary for air conditioning control, and a temperature setting switch for manually setting a desired in-vehicle air conditioning temperature; a calculation means for calculating input data from the setting switch and the sensor; and a control means for controlling the air conditioning equipment based on the calculation value of the calculation means, thereby bringing the temperature inside the vehicle closer to the set temperature set by the temperature setting switch. , a mode changeover switch for switching from a temperature setting mode to a control constant setting mode, a mode determination means for determining that the mode has been switched to the control constant setting mode, and a mode determination means for determining a determination signal. and an input circuit that inputs the input data from the temperature setting switch as a control constant to the storage means when output, and the calculation means performs calculation processing of the input data using the control constants stored in the storage means. A vehicle air conditioner characterized by: