JPH09254631A - Controller for air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To widely use a controller for an air conditioner for an automobile, for plural kinds of vehicles, by setting the reference electric potential of an automobile, electrically connecting or disconnecting the reference electric potential to/from an input part so as to generate a vehicle kind selecting signal, memorizing corresponding control data, and controlling the plural kinds of vehicles according to the control data matched to the selected vehicle kind selecting signal. SOLUTION: Respective vehicle kind exclusive operation programs for plural kinds of vehicles are memorized in a microcomputer 12. By the construction of a connecter 16, it can be optionally selected that a (0) signal and a (1) signal are inputted to what ports out of input ports. The (0) or (1) signals are inputted to the whole of the four ports of the microcomputer 12, therefore these signals are utilized as four-digit binary signals, and 16 kinds of signals can be inputted to the microcomputer 12. Therefore, if the signals are previously assigned to the vehicle kinds of the operational programs that the microcomputer 12 memorizes, the vehicle kinds of up to 16 kinds can be judged, and the plural kinds of vehicle can be controlled without changing a controller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an air conditioner for a vehicle, and more particularly to a control device for an air conditioner for a vehicle capable of supporting a plurality of types of air conditioners.

[0002]

2. Description of the Related Art If a vehicle is equipped in a vehicle interior and various sensors detect changes in the vehicle interior temperature due to changes in the outside air temperature and the amount of solar radiation, and once the temperature is set to the desired temperature, the vehicle interior temperature will always remain constant. The air conditioner for automobiles (hereinafter referred to as an auto air conditioner) is automatically controlled by a control device having a microcomputer (hereinafter referred to as a microcomputer) so as to keep the air temperature, the amount of the blown air, and the switching between the inlet and the outlet. There is.

A control device for such an automatic air conditioner is
The detection values detected by various sensors are used to perform calculation according to a calculation program incorporated therein. The calculation program is for calculating the blowout temperature and the air volume, selecting the blowout port, and the like, and the control device controls the air conditioning based on the calculation result. The content of the calculation program is determined according to each vehicle type because the configuration of the automobile, the capacity of the interior of the vehicle, and the like differ depending on the vehicle type, and is dedicated to a specific vehicle type.

Further, a control device having a built-in calculation program has only a built-in calculation program dedicated to a specific vehicle type, and is provided with a substrate which is designed only to process the built-in calculation program. Functioning as a control device.

[0005]

However, when a control device is developed for each specific vehicle type in this way, many types of control devices are developed, and the boards and parts of each control device are manufactured. In addition, the management is complicated, and the development cost and the number of days are disadvantageous.

The present invention has been made in view of the above points, and an object of the present invention is to provide a control device for a vehicle air conditioner that can be used universally for a plurality of vehicle types.

[0007]

A control device for an automobile air conditioner according to the present invention is a control device for controlling an air conditioner for a vehicle, comprising a reference potential setting section for setting a reference potential of the automobile. An electric signal input section for inputting an electric signal to the control device; a vehicle type selection signal generating section for electrically connecting or disconnecting the electric signal input section and the reference potential setting section to generate a vehicle type selection signal; A control data storage unit that stores control data corresponding to the vehicle type selection signal generated in the signal generation unit in a one-to-one relationship, and control data that matches the vehicle type selection signal from the control data storage unit, and the selected control data And an air conditioning control unit that controls the air conditioning apparatus according to the above.

With this structure, the control device can select the control data by the electric signal in the electric signal switching section.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present embodiment will be described with reference to FIGS.
This will be described with reference to FIG.

FIG. 1 is a block diagram showing the configuration of an automatic air conditioner using the control device of the present embodiment.

The automatic air conditioner 1 is roughly divided into a detection unit 2 including a plurality of sensors such as an outside air sensor 21, an air conditioning unit 5 that takes in air and blows the air into and out of a vehicle compartment, and a control unit 10 that controls them. it can. The control unit 10 is a microcomputer 12
The microcomputer 12 performs a calculation using the information detected by the detection unit 2, and controls the air conditioning unit 5 and the compressor 40 so as to realize the air conditioning state set by the occupant based on the calculation result. .

The calculation performed by the microcomputer 12 is processed by a calculation program stored in the microcomputer 12. The contents of the calculation program differ depending on the vehicle type, and are created to be used exclusively for each vehicle type. The microcomputer 12 of the present embodiment stores a calculation program dedicated to each vehicle type of a plurality of vehicle types.

The microcomputer 12 is connected to a vehicle type determination unit 30 which is a characteristic feature of the present embodiment. The vehicle type determination unit 30 is configured to determine the vehicle type connected to the automatic air conditioner 1, and the vehicle type determination program determined by the vehicle type determination unit 30 is used to calculate a plurality of vehicle types stored in the microcomputer 12. Selected from the program.

FIG. 2 is a circuit diagram showing a specific configuration of the vehicle type determination section 30.

The microcomputer 12 has an input port for the vehicle type determination unit 30 of ports 1 to 4, and an adapter harness 6 is connected to each input port. The end of the adapter harness 6 is the automobile and the air conditioner 1
A connector 14 for electrically connecting is attached.

On the other hand, the sensor 2 of the detection unit 2 is provided on the automobile side.
A sensor ground 4 for connecting 1, 23 and 25 is provided. The vehicle harness 8 is connected to the sensor ground 4, the connector 16 is attached to the end of the vehicle harness 8, and the connector 14 is connected to the connector 16.
The vehicle type determination unit 30 is connected to the vehicle 6.

The adapter harness 6 includes a connector 16
According to the above configuration, some are electrically connected to the vehicle harness 8 and some are not electrically connected to each other, and some of the input ports 1 to 4 are not connected to the port connected to the sensor ground 4. The 0 signal having the same potential as the ground is input to the input port connected to the sensor ground 4, and the voltage value of VDD7 is input to the input port not connected to the input port.

That is, in the present embodiment, the connector 1
With the configuration of 6, it is possible to arbitrarily select which of the input ports the 0 signal is input to and which port the 1 signal is input to.

A signal of 0 or 1 is input to all four input ports of the microcomputer 12, so that 4
It is possible to input 16 kinds of signals to the microcomputer 12 by using them as binary digit signals. Therefore, if the signals are assigned in advance to the vehicle types of the calculation program stored in the microcomputer 12, it is possible to determine up to 16 vehicle types. In the present embodiment, this 4-digit binary signal is hereinafter referred to as a vehicle code.

To configure the connector 16 in this way,
For example, the vehicle harness 8 connected to the port for inputting one signal does not have to be provided in the connector 16 from the beginning.
You may remove the electroconductive member of the connector 16 connected with the adapter harness 6 connected to the port which inputs a signal. It is also possible to use a jumper wire or a micro switch to select the connection method between the adapter harness 6 and the vehicle harness 8.

FIG. 3 is a flow chart showing the vehicle type determination processing of this embodiment.

When the vehicle type determination unit is constructed by connecting the connectors 16 and 14, the vehicle code is input to the microcomputer 12. The microcomputer 12 reads the input vehicle code (S1), and compares the vehicle code of the arithmetic program stored in the microcomputer 12 with the input vehicle code.

In the present embodiment, there are four types of vehicles storing the calculation program: vehicle type A, vehicle type B, vehicle type C, and vehicle type D, and 0001, 0011, 0111 and 111 respectively.
It is assumed that the vehicle code of 1 is assigned.

Therefore, the entered vehicle code is 0001
If so, the microcomputer 12 determines that the vehicle type of the automobile connected to the auto air conditioner is A (S2), and selects the calculation program for the vehicle type A (S3). Similarly,
When the vehicle code of 0011 is input, the calculation program of the vehicle type B is input (S5), and when the vehicle code of 0111 is input, the calculation program of the vehicle type C is input (S7). Then, the vehicle type D is selected as the one (S8).

The contents of the calculation program changed depending on the vehicle type are, for example, constants for data correction for processing the data detected by the outside air sensor 21, the inside air sensor 23, and the solar radiation sensor 25 of the detection unit 2 and input to the microcomputer 12, It is determined by the configuration of the vehicle such as the temperature at which the compressor is operated and stopped, the capacity of the vehicle interior, and the like.

The control unit 12 controls the automatic air conditioner according to the selected arithmetic program by using an arithmetic program dedicated to the vehicle type, which is set so as to perform optimum air conditioning for the vehicle type (S9). .

In the present embodiment described above, since one type of control device can be used to control the auto air conditioners of a plurality of vehicle types, the types of parts such as the board and IC of the control device to be managed. This reduces the number of parts and facilitates parts management on the manufacturing side. Further, it is not necessary to develop a control device associated with the development of a new automobile, which can reduce the number of days and cost involved. Further, it is advantageous for inventory management of the control device.

[0028]

The control device for an automobile air conditioner according to the present invention can input a vehicle type selection signal to the control device and determine the control contents of the control device by this signal. Therefore, it is possible to control a plurality of automobiles without changing the control device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an automatic air conditioner including a control device for an automobile air conditioner of the present invention.

FIG. 2 is a circuit diagram of a vehicle type determination unit of the control device for the air conditioner for a vehicle of the present invention.

FIG. 3 is a flowchart of a vehicle type determination process performed by the control device for an automobile air conditioner of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Control device, 2 ... Detection part, 4 ... Sensor ground, 7 ... Power supply voltage, 8 ... Vehicle harness, 10 ... Control part, 12 ... Microcomputer, 14, 16 ... Connector, 30 ... Vehicle type determination part.

Claims (1)

[Claims] 1. A control device for controlling an air conditioner for an automobile, comprising: a reference potential setting unit (4) for setting a reference potential of the automobile.
8), an electric signal input section (6, 7) for inputting an electric signal to the control device (12), an electric signal input section (6, 7) and a reference potential setting section (4, 8) which are electrically connected. Type selection signal generation unit (6, 8, 30) that generates a vehicle type selection signal by connecting or disconnecting the signals dynamically
And a control data storage unit (12) for storing control data corresponding to the vehicle type selection signal generated by the vehicle type selection signal generation unit (6, 8, 30) in a one-to-one relationship, and the control data storage unit (12). ), The control data that matches the vehicle type selection signal is selected, and the air conditioning control unit (1) that controls the air conditioning apparatus according to the selected control data is selected.
2) A control device for an air conditioner for a vehicle, comprising: