JPS62194927A - Air-conditioning device for automobile - Google Patents

Abstract

PURPOSE:To aim at making automatic air-condition comfortable, by changing over the operation mode of an air-conditioning device into a mode controlled by an automatic control means if a manual control condition is deviated from an optimum control condition during start of the air-conditioning device. CONSTITUTION:A control unit 29 receives a passenger's compartment temperature signal from a passenger's compartment temperature sensor 30, an outside air temperature signal from an outside air temperature sensor 31, a duct-inside temperature signal from a duct temperature sensor 32, a cooling water temperature signal from a water temperature sensor 33 and solar radiation signals from first and second solar radiation sensors 35, 37. Further, there is provided a manipulation switch 38 for manual control 38. During start of the air- conditioning device, when an already selected control condition for manual control is deviated from an optimum control condition which would be established if an automatic control mode is selected, the manual control mode is changed over into the automatic control mode so that the control operation is suitable for the present environment under the automatic control mode, thereby it is possible to obtain a comfortable air-condition.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an air conditioner for an automobile that can be switched between manual control and automatic control.

(Prior Art) In recent years, so-called automatic air conditioners that automatically control based on information from various sensors have been widely used as air conditioners for automobiles (Japanese Patent Laid-Open No. 60-12326).
(see publication).

This type of air conditioner is generally switchable between automatic control and manual control, so that the occupant can select which one to use.

Nowadays, with the development of various sensors and electronic technology, optimal control of air conditioners is now possible, and the manual control described above is currently provided to supplement automatic control.

In other words, automatic control is capable of generating control conditions that adequately correspond to current environmental conditions, and manual control is therefore only used in situations where automatic control is unsatisfactory.

(Problem to be Solved by the Invention) Under the current circumstances, if the device is stopped with 1 manual control selected and the device is started after a while, it is necessary to change the current environment and the manual control selected. The environment at that time has often changed significantly.

In other words, the environment changes significantly while the vehicle is parked. Alternatively, because the weather changes significantly during driving, the manual control conditions selected before the device is stopped are often unable to match the environment at the time the device is started.

To give you a specific example, if you set the air volume to maximum while driving at night in a very cold day, park the car, and then start it the next day when it's warm, you can set the outside air blower at night when it's cold, park the car, and then start the car. If it starts when it's hot and humid the next day,
Or, suppose you park your car with foot ventilation set during a severe cold and then start it the next day when it is warm. When starting the engine, that is, when starting the air conditioner, the manual control that has already been selected will be activated. Since air conditioning is performed under these control conditions, there are problems such as the air volume being too large, outside air being blown despite the need for a cooler, and too hot air being blown towards the feet.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to prevent air conditioning from being controlled in a manner that does not suit the current environmental conditions when the device is started with manual control selected. Our goal is to provide air conditioning equipment.

(Means and effects for solving the problem) In order to solve the above technical problem, the present invention provides that when the device is started up, if the control condition of manual control that has already been selected is set to automatic control, When the control conditions deviate from the optimal control conditions that would be generated if It is something.

Specifically, 1 the present invention switches between automatic control means that generates optimal control conditions for the actuator based on information from various sensors, and manual control means that generates manual control conditions selected by manual operation. As shown in Fig. 1, on the premise that the air conditioner of an automobile has been made possible, there is a startup time determination means that determines when the air conditioner is activated, and a means that determines that the manual control means is selected. and a manual determining means that receives a signal from the manual determining means to determine the manual control condition when the manual control means is selected and the optimum control condition when the automatic control means is selected. and a comparison means for comparing.

control change means that receives a signal from the comparison means and switches to the automatic control means when the manual control condition deviates from the optimum control condition, provided that the air conditioner is starting up; The structure is equipped with the following features.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 2 shows the main body of the air conditioner A. In this figure, 1 is a main duct, and the main duct 1 is provided with an outside air intake 2 at its upstream end, which takes in outside air, and an inside air intake 3, which takes in air from inside the vehicle, and at its downstream end. The department includes
A first outlet 4 for the heat duct, a second outlet 5 for the def duct and a third outlet 6 for the vent duct are provided. A heat duct 7 is connected to the first outlet 4, a differential duct 8 is connected to the second outlet 5, a vent duct 9 is connected to the third outlet 6, Main duct 1 and L ducts 7.8
．． 9 constitutes a passage for conditioned air. and,
The heat duct 7 is arranged so that its air outlet blows out air-conditioned air toward the feet of the front seat occupant, and the vent duct 9 has its air outlet that blows out air-conditioned air toward the front seat occupant's face. It is arranged as follows.

Inside the main duct 1, from the upstream side, there are a blower 11 driven by a motor 10, a blower 12,
A heat core 13 is provided.

The evaporator 12 includes a condenser 14 and an engine 1.
The evaporator 12 is incorporated into a cooling circuit consisting of a compressor 16, an expansion valve 17, etc. mechanically driven by an output shaft 15a of the evaporator 12, and is designed to dehumidify or cool the air passing through the evaporator 12. In the figure, arrows indicate the flow of refrigerant.

Further, the heat core 13 is connected to a cooling water passage in the engine l via pipes 18 and 19.
Engine cooling water is introduced into the heat core 13 to warm up the air passing through the heat core 13. A flow rate control valve 20 is disposed in the upstream pipe 18 that introduces engine cooling water into the heat core 13, and this valve 20 is linked with an air mix door 21, which will be described later. In the figure, arrows indicate the flow of engine cooling water.

Inside the main duct 1, an inside/outside air door 22 for opening and closing the outside air intake port 2 and the inside air intake port 3 is disposed at its upstream end, and immediately upstream of the heat core 13, the outside air door 22 is disposed at its upstream end.
An air mix door 21 for controlling the proportion of air passing through the main duct 3 is disposed, and a first mode door 24 for opening and closing the heat duct outlet 4 is provided at the downstream end of the main duct 1.
A second mode door 25 is provided to switch between opening and closing the outlet 5 for the def duct and the outlet 6 for the vent duct. By controlling the opening and closing of the first and second mode doors 24 and 25, the air-conditioned air outlet is set to the first blowout mode at the feet of the front seat occupant, that is, only the heat duct 7, and the first blowout mode at the front seat occupant's face, that is, the vent. Three blowout modes are possible: a second blowout mode for only the duct 9, and a third blowout mode for the feet and face.

Further, the air mix door 21 is linked to the flow rate control valve 20 via a bell crank 23, and the first mode door 24 and the second mode door 25 are connected to each other via a rod 25.
They are connected by a and are designed to interlock with each other. Each of these doors 21.22.24.25 has a motor 26.27
．． 28, the motors 26, 27, 28 are driven by signals s, , s2 . from the control unit 29. It is activated based on s3. In addition, in FIG. 2, 27a is a potentiometer that detects the opening degree of the air mix door 21.

As shown in FIG. 3, the control unit 29 contains various information necessary for adjusting the air in the vehicle interior, such as a temperature signal in the vehicle interior from the interior sensor 30, an outside air sensor 31, etc.
In addition to the outside air temperature signal from the duct sensor 32, the duct internal temperature signal from the duct sensor 32, and the ON/OFF signal depending on the engine cooling water temperature from the water temperature switch 33, The front side solar radiation signal from the solar radiation sensor 35 and the rear side solar radiation signal from the second solar radiation sensor 37 disposed near the rear window glass are input, and the door control signals s, , s2 are input from the control unit 29. ．． s3 is output to each motor 26, 27, 28, and a control signal S4 is output to the power transistor lOa of the pro-ar motor 10.

This control unit 29 operates based on a setting device 38 installed on the front panel.
The inside/outside air switch SW2 sets the inside/outside air, and the blowout mode switch SW3~ sets the air outlet of the conditioned air.
5, and an air conditioner switch SW6 that operates the compressor 16 to cool and dehumidify the air. A temperature switch SW8 for setting the target vehicle interior temperature To, an air volume switch SW9 for setting the air volume of conditioned air, and an auto mode switch (AUTO) SWIO for selecting automatic control are provided.

Note that the switch SWI is an ON-OFF switch for a fogging heat shield provided on the rear window glass 36.

The control unit 29 generates the selected control conditions in response to the selection operations of the switches SW2 to SW9, and outputs control signals to the various actuators 10, 26, 27, and 28.

For example, by selecting the inside/outside air switch SW2, the inside/outside air motor 26 is operated, the inside/outside air intake port 2.3 is changed, and the introduction of inside/outside air is switched. Mode motor 2 is set by selecting operation of blowout mode switches SW3 to SW5.
8 is activated, the mode doors 24 and 26 are set in a predetermined manner, and the Suita outlet (blowout mode) of the conditioned air is changed. Further, by operating the temperature switch SW8, the target indoor temperature To is set, the opening degree of the air mix door 21 is changed, and the blowing temperature of the conditioned air is adjusted.

5 In this embodiment, the opening degree adjustment of the air mix door 21,
In other words, the blowout temperature is adjusted based on the calculation of @appropriate outlet temperature TF, which will be described later.

Automatic control This will be explained with reference to the flowchart shown in FIG.

In response to information from the setting device 38 and various sensors 30 to 33, 35, and 37, optimal control conditions corresponding to the target indoor temperature To set in the temperature switch SW8 are generated (step S4), and each actuator 10, 27 A control signal is outputted for the following (steps 56 to S10).

The outline of the basic control in this air conditioning automatic control is that the optimum blowing temperature TF is calculated based on the comparison between the target indoor temperature To and the actual vehicle indoor temperature T detected by the indoor sensor 30 and the temperature difference ΔT ( Step S4): When the actual vehicle interior temperature T is low, the opening degree of the air mix door 21 is increased.

The proportion of air passing through the heat core 13 is increased to raise the blowout temperature of the conditioned air (step S6). Conversely, when the actual vehicle interior temperature T is high, the compressor 16
is operated to cool the air passing through the evaporator 12 (step S8), and the temperature difference ΔT is determined based on the magnitude of the temperature difference ΔT between the target vehicle interior temperature To and the actual vehicle interior temperature T. The larger the value, the more the air volume of the conditioned air is increased (step S7).In addition, the optimum blowing temperature TF is set in advance based on the height of the optimum blowing temperature TF.
- Based on the blowout mode, for example, when the optimum Suita temperature TF is 40°C or higher, the first blowout mode (foot);
2nd blowout mode (face) when below ℃, 40℃～2
When the temperature is 0° C., the mode doors 24 and 25 are controlled to be in the third blowout mode (foot, face), and the air outlet of the conditioned air is automatically set (step S8). This comparison table is shown in FIG.

For such basic control, an outside temperature signal from the outside air sensor 31, an inside duct temperature signal from the duct sensor 32,
Corrective control is performed using information such as solar radiation signals from the solar radiation sensors 35 and 37.

Startup Control (FIG. 4, Step S5) To make the explanation easier to understand, the explanation will be limited to the blowout mode as an example of the present invention.

First, in step S21, it is determined whether or not the device A is starting up. When it is determined that the device A is starting up, the process moves to step S22.

It is determined whether the blowout mode switches SW3 to SW5 are ON, that is, whether the Suita mode has been manually set. When the blowout mode is manually set, in step 523, the appropriate blowout temperature TF' in that blowout mode is calculated. That is, taking into account the conditions in the mode setting in automatic control (see Figure 5), for example, when the first blowing mode is selected, TF' = 50°C, and when the third blowing mode is selected. When it is, TF'=30℃,
When the second blowing mode is selected, TF'=
After calculating the temperature to 10°C, the next step S24
In, the appropriate blowing temperature TF′ and the optimum blowing temperature TF
A determination is made as to whether the absolute value of the difference is greater than a predetermined value α. In other words, the control conditions generated when automatic control is selected in step S24;
A comparison is made with the manually selected control conditions, and if the absolute value l TF - TF'l of the temperature difference is greater than the predetermined value α, it is determined that the Suita mode, which does not suit the current environmental conditions, has been selected, and the step In S25, a control change is made to switch to automatic control. According to this control change, the optimum blowing mode is automatically set as shown in FIG. 4 (step S9).

Although one embodiment of the present invention has been described above, the present invention is not limited to only the blowout mode, but also determines whether or not the air volume, internal/external air switching, compressor control, etc. Of course, it also includes things that change.

(Effects of the Invention) As is clear from the above description, according to the present invention, when the air conditioner is started with manual control still selected, control unsuitable for the current environmental conditions is performed. This can be prevented and a more preferable automatic air conditioner can be achieved.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of the present invention; FIG. 2 is a mechanical configuration diagram in an embodiment of the present invention; FIG. 3 is a control system diagram in an embodiment of the invention; FIG. 5 is a flowchart showing an example of basic control; FIG. 5 is a setting comparison table of optimum blowout temperature TF and blowout mode in automatic control; FIG. 6 is a subroutine showing an example of startup control. A: Air conditioner 27-28: Actuator 29: Control unit 30-32.33.35.37: Various sensors 38 Two setting device TF: Optimal Suita temperature TF': Appropriate blowout temperature

Claims (1)

[Claims] (1) automatic control means that generates optimal control conditions for the actuator based on information from various sensors;
manual control means for generating a manual control condition selected by manual operation; startup time determination means for determining that the air conditioner is at startup time in an automobile air conditioner capable of switching; and manual control. a manual determination means for determining that the means is selected; and upon receiving a signal from the manual determination means, when the manual control means is selected, the manual control condition is determined;
a comparison means for comparing the optimum control conditions when the automatic control means is selected; and upon receiving a signal from the comparison means, the manual control An air conditioner for an automobile, comprising: control change means for switching to the automatic control means when conditions deviate from the optimum control conditions.