JP2596794B2 - Operation display device for vehicle air conditioner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device of a vehicle air conditioner for displaying an air conditioning control state of an automatic air conditioner.

(Prior art) This type of display device normally employs an “AU” (Automatically Controlled) air-conditioning control mechanism that automatically controls all air-conditioning control mechanisms.
When the "TO" switch is pressed, the AUTO display is turned on, and when any of the air conditioning control mechanisms is switched to manual control, the AUTO display is turned off.

According to such a device, for example, in order to urgently remove the fogging of the window glass, the A / C operation mode has been set to the economic control mode ("ECO" mode) in the automatic state until now. If the mode is switched to `` A / C '' mode, or if the suction mode is set manually from outside air introduction to inside air circulation to prevent the intrusion of exhaust gas etc. The AUTO indicator goes off, despite the fact that it is performed sufficiently to be comparable. For this reason, if you move, you will have the illusion that you have not yet used the automatic control function, and if the occupant presses the `` AUTO '' switch again, it will return to the full auto state and the manual setting state will be released There is a possibility that desired air conditioning cannot be maintained.

In order to eliminate such a risk, for example, the display units provided for each operation mode are illuminated by changing the display color between when in the automatic control mode and when in the manual control mode, respectively. It is also conceivable to make the occupant judge whether or not the "AUTO" switch is operated by recognizing the respective operating states.

(Problems to be Solved by the Invention) However, even if the presence or absence of the operation of the "AUTO" switch is determined based on the display color of the display unit, whether or not the control for approaching the set temperature in the vehicle compartment can be maintained in the current operating state. Since it is not possible to judge exactly whether or not the operation of the `` AUTO '' switch is really necessary, there is a drawback that the time when it is really necessary to change the display color is changed. It becomes necessary every time, and the panel configuration and circuit configuration of the display panel become complicated.

Therefore, in the present invention, it is possible to accurately display whether or not the automatic control function is necessary by using the display panel having a simple configuration which has been conventionally used as it is, so that the occupant can accurately operate the air conditioner for the vehicle. It is an object of the present invention to provide a display device that can perform such a display.

(Means for Solving the Problems) The gist of the present invention is, as shown in FIG. 1, an automatic selection means for switching a movable mechanism for performing temperature control to automatic control, and a manual control for the movable mechanism. An operation display device of a vehicle air conditioner having at least an automatic display unit 42 corresponding to the automatic selection unit, wherein the movable mechanism is an automatic control or a manual control. Control mode determining means 500 for determining whether the automatic control is the same as the control state obtained when the automatic control is selected when the control mode determining means 500 determines that the manual control is performed. Comfort control state determination means 600 for determining whether or not the control is performed, and control by manual control by the comfort control state determination means 600. Display control means and the auto display unit is turned on if the condition is determined to be identical to the control state by auto control 70
0 has been provided.

(Operation) Therefore, even if one of the control mechanisms is manually set in the mode from the fully-automatic state, the AUTO display section remains lit as long as the temperature control state similar to that at the time of the automatic control can be maintained. Just by checking whether the display unit is lit or not, it is possible to accurately recognize whether the operation state of the air conditioning control is a state requiring the automatic control function,
Therefore, the above object can be achieved.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 2, the vehicle air conditioner is provided with an intake door switching device 2 at the most upstream side of an air conditioning duct 1, and this intake door switching device is provided with an inside and outside air at a portion where an inside air inlet 3 and an outside air inlet 4 are separated. A switching door 5 is provided, and a desired suction mode in which the air to be introduced into the air conditioning duct 1 can be selected from inside air and outside air by operating the inside / outside air switching door 5 by the actuator 6 is obtained.

The blower 7 sucks air into the air-conditioning duct 1 and blows the air downstream. An evaporator 8 and a heater core 9 are provided behind the blower 7.

The evaporator 8 includes a compressor 10, a capacitor 11,
A cooling cycle is constituted by pipe connection together with a liquid dunk 12 and an expansion valve 13.The compressor 10 is connected to an engine of a vehicle via an electromagnetic clutch 15, and is turned on and off by intermittently connecting the electromagnetic clutch 15. Is done. Further, the heater core 9 circulates cooling water of the engine to heat the air. An air mix door 16 is provided in front of the heat core 9. The opening of the air mix door 16 is adjusted by an actuator 17 so that the amount of air passing through the heater core 9 and the amount of air bypassing the heater core 9 change. As a result, the temperature of the blown air is controlled.

The downstream side of the air-conditioning duct 1 is divided into a defrost outlet 18, a vent outlet 19, and a heat outlet 20 and opens to the passenger compartment. The divided parts are the mode doors 22a, 22b,
The mode doors 22a, 22b, and 22c are operated by the actuator 24 so that a desired blowing mode can be obtained.

25 is a cabin temperature detector for detecting the temperature TR inside the cabin, 27
Is an opening detector which is configured by, for example, a potentiometer for detecting the opening θ _X of the air mix door, 28 is an outside air temperature detector for detecting the temperature TA outside the vehicle compartment, and these output signals are used for signal selection. Performing Multiplexer (MPX) 31
Is input to an A / D converter 32, where it is converted into a digital signal and input to a micro computer 33.

Further, an output signal from the operation display panel 34 is input to the micro computer 33. This operation display panel
Mode switches 35a to 35e for manually setting the blowing mode to one of vent (VENT), bilevel mode (B / L), heat mode (HEAT), differential heat (D / H) and defrost (DEF) Set the suction mode to inside air (RE
C) and inside / outside air switching switch 36 that alternately switches between outside air introduction (FRESH), A / C switch 37 that sequentially switches comparator 10 to normal control (A / C), economic control (ECO), off state (OFF), and blower Blower switch 4 for sequentially switching the number of rotations
4.AUTO switch that sets all of the blow mode, suction mode, A / C mode, blower speed, etc. to automatic control mode
38, all of the blow-out, suction mode and blower rotation speed
Equipped with an OFF switch 47 and a temperature setting device 43 to be F,
On the upper side of each switch, for example, display units 39a to 39 made of LEDs
e, 40, 41a, 41b, 42 are provided. In particular, the display unit corresponding to the A / C switch 37 has two A / C display units 41a and ECO display units 41b.

The temperature setting device 43 includes an up-down switch 43a and an indicator 4
3b, the set temperature (TSET) shown on the display 43b can be changed within a predetermined range by operating the switch 43a.

The temperature setting device may be of a type in which a template bar is slid.

The microcomputer 33 has a central processing unit (CPU), a read-only memory (ROM), a random access memory (RAM), an input / output port (I / O), and the like (not shown). Based on the signal, the actuators 6, 17, 24, the compressor 10 and the blower 7
A control signal is output to each of the motors via drive circuits 45a to 45e, and drive control of the doors 5, 16, 22a, 22b, and 22c, on / off control of the compressor 10, and rotation control of the motor are performed.

Further, a display signal is output to the operation display panel 34 via a display control circuit 46, and lighting control of each display unit is performed.

In FIG. 3, a control example of the display unit by the computer is shown as a flow chart, and the following description will be made in accordance with the flow chart.

First, when an ignition switch (not shown) is turned on, power is applied to the air conditioner including the micro computer 33 and the air conditioner is turned on.

Then, the microcomputer 33 starts the control from step 50, and inputs various signals such as the outside temperature TA in the next step 52 and stores them in a predetermined area of the RAM. Then, in the next step 54, the thermal load in the passenger compartment is calculated in the form of a total signal T by using, for example, equation (1).

T = K ₁ · TR + K ₂ · TA−K ₃ · TSET + C (1) where K ₁ , K ₂ , K ₃ , and C are operation constants.

After this calculation, the process proceeds to step 55, and when the auto switch 38 is pressed, any of the mode doors 22a to 22c, the inside / outside air switching door 5, and the compressor 10 are automatically controlled based on the total signal T in a fully automatic state, and the automatic control is performed. In this case, the operation proceeds to step 64 to display the current control state. Here, in the blowout mode, the display units 39a to 39d above the mode switch corresponding to the control state are turned on, and in the suction mode, the light is turned on when the inside air is introduced, and is not turned on when the outside air is introduced. Yes, in A / C mode, the compressor is off
In the state, no light is turned on, and in the A / C mode or the ECO mode, the corresponding display section 41a or 41b is turned on.

Then, in the next step 66, the display section 42 above the AUTO switch 38 is turned on, and the process exits to another control routine for performing the air conditioning control via the step 90.

In step 56, it is determined whether or not the blow mode switches 35a to 35e are operated to switch the blow mode from the automatic control to the manual control. If the mode switches 35a to 35e are not operated and the automatic control is maintained in step 56, the process proceeds to step 58, and the inside / outside air switching switch 36 is operated to switch the suction mode from the automatic control to the manual control. It is determined whether or not. Further, if the suction mode is maintained at the automatic control in step 58, the process proceeds to step 60, where it is determined whether or not the A / C switch 37 is operated to switch the A / C mode to manual control. .

If it is determined in step 56 that the blowout mode has been switched to the manual control, the process proceeds to step 68, in which the mode doors 22a to 22c are first set to positions corresponding to the selected mode, and the next step is performed. At step 70, the display above the mode switch (any one of 35a to 35e) operated to select the mode is turned on to display the set state. Then, in the next step 72,
It is determined whether or not it is possible to maintain a comfortable temperature control by manually controlling the blowing mode.

Specifically, as shown in FIG. 4, in step 100, it is determined whether or not the switch 35a corresponding to the VENT mode among the mode switches is pressed, and it is determined that the switch 35a is not pressed. If (NO), step 102
It is determined whether or not the switch 35b corresponding to the B / L mode has been pressed, and if it is determined that the switch 35b has not been pressed (N
In step O), it is determined in step 104 whether the switch 35c corresponding to the HEAT mode has been pressed. If it is determined that the switch 35c has not been pressed, the switch 35d corresponding to the H / D mode is pressed in step 106. Is determined.
If it is determined in step 100 that the switch 35a has been pressed, the process proceeds to step 108, in which the blowing mode determined based on the above-described total signal T, that is, the blowing mode (MAUTO) that should be selected during automatic control. Is in the VENT mode. In the VENT mode, temperature control that is no different from automatic control can be maintained, so go to step 118 and set the flag to “1” to indicate that temperature control is possible. If the mode is other than the VENT mode, the VENT mode must be set to perform comfortable temperature control.
Since the mode is fixed, the process proceeds to step 120, and the flag is set to "0" to indicate that comfortable temperature control cannot be performed. If it is determined in step 102 that the mode switch 35b has been pressed, the process proceeds to step 110, where it is determined whether or not the blowing mode (MAUTO) during automatic control is the B / L mode. Similarly, (MA
If UTO) is in the B / L mode, the process proceeds to step 118 to set the flag to "1". If not, the process proceeds to step 120 to set the flag to "0". The same is true when it is determined in step 104 that the mode switch 35c has been pressed. In step 112, it is determined whether MAUTO is in the HEAT mode. If the mode is the HEAT mode, the flag is set to "1" (step 118). If so, it is set to "0" (step 120). If it is determined in step 106 that the mode switch 35d has been pressed, the flow advances to step 114 to determine whether MAUTO is in the H / D mode. If not, the flag is set in step 120. Is set to “0”, and if in H / D mode, step 116
Then, it is determined whether or not the vehicle exterior temperature TA is lower than the predetermined temperature α. This α is a predetermined value for determining whether the environment is such that the window glass is easily fogged. T
If A is smaller than α, it is desirable to warm the feet and have a defrost function at the same time, so in this case, since the setting of the H / D mode matches the control for obtaining comfortable air conditioning, proceed to step 118, Set the flag to “1”.
Conversely, if TA is larger than α, the need for the defrost function is eliminated, and if the H / D mode is maintained, the head becomes too hot and uncomfortable, so that the procedure proceeds to step 120 to indicate that comfortable temperature control cannot be performed. Set the flag to “0”.

If it is determined in step 106 that the mode switch 35d corresponding to the H / D mode is not pressed (NO), the blowout mode is always the DEF mode, and priority is given to clearing the window glass over temperature control. Proceed to step 120 to indicate that a comfortable temperature control cannot be maintained because the operation is being performed. Then, after steps 118 and 120, the process returns to the main routine, and proceeds to step 86.

If it is determined in step 58 that the suction mode has been switched to the manual control, the process proceeds to step 74, in which the intake door 5 is set to a position corresponding to the selected mode, and in the next step 76. The display unit 40 on the inside / outside air switching switch 36 is turned on when the selection mode is the inside air introduction, and is turned off when the outside air is introduced. And
In the next step 78, it is determined by the subroutine in FIG. 5, for example, whether or not comfortable temperature control can be maintained by manual control of the suction mode.

In FIG. 5, first, in step 200, the suction mode is set to FRE.
It is determined whether or not the SH mode has been selected. If the FRESH mode has been selected, the process proceeds to step 202, where the suction mode (IAUTO) at the time of automatic control determined based on the general signal T is set to the FRESH mode. It is determined whether or not there is. If the IAUTO is in the FRESH mode, temperature control that is no different from the automatic control can be realized, so the process proceeds to step 210 and the flag is set to “1” to indicate that the temperature control is possible.
If the IAOTO is in the REC mode, the outside air is forcibly introduced even if it is not desired to introduce the outside air. Therefore, the process proceeds to step 212 to indicate that comfortable temperature control is impossible, and the flag is set to “0”. Set to On the other hand, at step 200
If it is determined that the RESH mode has not been selected (N
O) Since the REC mode has been selected, the process proceeds to step 204, where it is determined whether or not the IAUTO is in the REC mode. If the IAUTO is in the REC mode as in the above step, step 2 is executed.
Go to 10. If IAUTO is in the FRESH mode in step 204, the process proceeds to step 206, where it is determined whether or not the vehicle exterior temperature TA is lower than a predetermined temperature β. Here, β is a predetermined value for judging whether or not the vehicle exterior temperature TA is so high that cooling is necessary. If TA is higher than β, proceed to step 208 to determine whether or not the A / C switch 37 has been operated to activate the cooling cycle.However, if the cooling cycle is not operating, how much outside air is introduced Even so, the interior of the vehicle cannot be lowered to a comfortable temperature, and the process proceeds to step 212 to indicate that comfortable temperature control is not possible. On the other hand, if TA is higher than β and the cooling cycle is operating, comfortable temperature control is possible, and the process proceeds to step 210. Then, after steps 210 and 212, the process returns to the main routine, and proceeds to step 86.

Further, when it is determined in step 60 that the A / C mode has been switched to the manual control, the process proceeds to step 80, where the compressor 10 is set to the selected control mode, and in the next step 82, the A / C mode is set. Display section 4 above C37
1a and 41b are turned off when the selection mode is OFF, the A / C display 41a is turned on for normal control, and the ECO display 41b is turned on for economic control. Then, in the next step 84, it is determined by a subroutine as shown in FIG. 6 whether or not comfortable temperature control can be intermittently performed by manually controlling the A / C mode.

That is, in step 300, it is determined whether or not the A / C mode has been selected for the economic control (ECO). If the A / C mode has been selected for the economic control, the process proceeds to step 302, where the determination is made based on the total signal T. A / C mode during automatic control (CAUT
It is determined whether or not O) is economic control (ECO). If it is determined in step 302 that AUTO is economic control, temperature control that is no different from automatic control can be realized, so the process proceeds to step 312, and the flag is set to "1" to achieve comfortable temperature control. It indicates that it is possible, and if AUTO is in another mode, the cooling capacity will be too high or too low.
Proceeding to 314, the flag is set to "0", indicating that comfortable temperature control cannot be realized. On the other hand, when it is determined that the economic control is not manually selected in step 300, step 304 is executed.
Then, it is determined whether the normal control (A / C) or the OFF state is selected. If it is determined that the normal control (A / C) has been selected, the process proceeds to step 306 to execute the AUTO control.
It is determined whether or not is the normal control (A / C). If the AUTO is the normal control (A / C) as in the above step, step 3 is performed.
Proceed to 12.

In step 306, the normal control is performed by AUTO (A / C).
If it is determined to be other than the above, the process proceeds to step 308, and it is determined whether or not the vehicle exterior temperature TA is higher than the predetermined temperature γ.
This γ is a predetermined value for determining whether or not the outside temperature TA is so high that cooling is necessary. TA is γ
If it is higher, the normal temperature control is performed even if the AUTO is not A / C, so that comfortable temperature control can be performed.
Proceed to 312, and if TA is lower than γ, the cabin will be too cold if normal control (A / C) is performed while CAUTO is set to economical control (ECO) or OFF. Since it becomes impossible to maintain comfortable temperature control, step 31
Proceed to 4. If it is determined in step 304 that the control is not the normal control (A / C), the OFF state is manually selected. Therefore, in step 310, it is determined whether or not the AUTO is in the OFF state. If is in the OFF state, the flow proceeds to step 312. If CAUTO is in a mode other than the OFF state, the flow proceeds to step 314. Then, after steps 312 and 314, the process returns to the main routine, and proceeds to step 86.

In step 86, it is determined whether or not the content of the flag set in each subroutine is "1". If "1", the process proceeds to step 66, where the display 42 on the AUTO switch 34 is turned on. If "0", the process proceeds to step 88, where the display unit 42 is turned off. Thereafter, the process proceeds to another routine through steps 66 and 88.

Therefore, the AUTO display section 42 displays the mode switches 35a to 35a.
5e, It does not turn off simply by operating either the inside / outside air switching switch 36 or the A / C switch 37 to switch from the full auto mode to the partial auto mode, but it stays on as long as comfortable temperature control is possible manually. Keep doing.

For this reason, the point in time when manual control is truly required to restore comfortable temperature control can be made to correspond to the point in time when the automatic display unit 42 is turned off.

(Effect of the Invention) As described above, according to the present invention, even when the air conditioner for a vehicle is manually controlled, the automatic display unit is turned on when the manual operation is equal to the automatic control. As a result, the occupant can easily recognize whether or not the current control state matches the state required by the automatic control simply by looking at the lighting and non-lighting of the auto display unit, and provides comfortable vehicle air conditioning. The device can be operated.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing the present invention, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a flow chart showing lighting control of a display unit of an operation display panel used in the above embodiment. FIG. 4 is a subroutine showing an example of a temperature control possibility determination at the time of manual control in the blowing mode, FIG. 5 is a subroutine showing an example of temperature control possibility determination at the time of manual control in the suction mode, and FIG. It is a subroutine showing an example of temperature control possibility determination at the time of manual control in the C mode. 42 ... Auto display section, 500 ... Control mode judgment means, 600
... Comfort control state determination means, 700 display control means.

Claims (1)

(57) [Claims] 1. An automatic selection means for switching a movable mechanism for performing temperature control to automatic control and a manual selection means for manually controlling the movable mechanism, and at least an automatic display unit corresponding to the automatic selection means is provided. A control mode determining means for determining whether the movable mechanism is an automatic control or a manual control; and a case where the control mode determining means determines that the manual control is performed. A comfort control state determination means for determining whether or not the control state by manual control is the same as a control state obtained when the automatic control is selected; and a control state by manual control by the comfort control state determination means. When it is determined that the control state is the same as the control state by the automatic control, the automatic display unit is turned on. Operation display device of a vehicle air-conditioning system, characterized in that a display control means.