JPH0220419A - Controller of vehicular air controller - Google Patents

Abstract

PURPOSE:To maintain comfortable air conditioning and safe driving by interrupting the operation of air conditioning equipment governing the blowing capability and the cooling capacity when a stop mode command signal is generated, and locking both the suction mode and the blow-out mode when it is decided that the room is in the specified circumstance. CONSTITUTION:When the stop mode is selected by operation of a personnel to generate the stop mode command signal from a stop mode instruction means 130, a control means 150 interrupts the operation of an air conditioner which governs the variation in blow-out capability and the cooling capacity. When a decision means 140 decides that the room is in the specified circumstance the suction mode and the blow-out mode are locked and otherwise, these modes are varied in accordance with the output of a mode variation command signal 120. That is, under the specified circumstances, the output of the mode variation command signal from the mode variation command means 120 is cancelled so that there is no fear to cause unnecessary modification of the current state.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a control device for a vehicle air conditioner that improves control when a stop mode is selected by a command operation by a passenger.

(Prior Art) A vehicle air conditioner, known as an O-1 air conditioner, automatically controls air conditioning equipment such as an intake door, blower, compressor, mode door, etc. to obtain desired air conditioning. In addition to changing modes such as blowout mode, it is now possible for the occupants to independently command the selection of modes such as stop mode. It is known that the blower and compressor should be completely stopped, and the intake door and blowout mode door should be activated in response to a command to change the mode from a passenger (Special Publication No. 62-2803). .4 Public!II).

(11M to be solved by the invention) However, if the suction mode and the blowout mode are set so that they can always be driven based on the passenger's commands even though they are in the stop mode, if the passenger resents the wrong command, the system will not be maintained until now. There was an inconvenience that the previously unobstructed state was impaired.

For example, during the summer, the intake mode may be changed to internal air intake mode (R
If air conditioning was performed as IEC).

After selecting stop mode 1''', open air intake mode 14 (PI(E
SII) If the command to change A. is made by mistake, the interior of the vehicle will rapidly become hot, and the window glass demises 1-
If the blowout mode is set to defrost mode or the suction mode is set to FRESH to perform
If the command to change to C is made by mistake, hot air will be blown onto the occupant's head, causing discomfort, and the window glass will begin to fog up, reducing visibility, resulting in a dangerous situation.

Therefore, the object of the present invention is to eliminate the above two disadvantages. 2. It is an object of the present invention to provide a control device for a vehicle air conditioner that can maintain comfortable air conditioning and safe driving conditions. .

(Means for Solving the Problems) The gist of the present invention is, as shown in FIG. environmental signal generation means IJ-0, mode change command means 120 that generates a command signal to change all or part of the air blowing capacity, cooling capacity, suction mode, and blowout mode by the operation of the passenger; stop mode command means 3.30 for generating a mode command signal; determination means j-40 for determining whether or not the environment belongs to a predetermined environment based on the output of the environment signal generation means 110; When a stop mode command signal is output by the command means 130, the operation of the air conditioning equipment involved in changing the ventilation capacity and cooling capacity is stopped +1.
- The determination means 1 determines the inhalation mode and the blowout mode.
40, it is fixed when it is determined that it belongs to a predetermined environment, and when it is determined that it does not belong to it, it is changed according to the output of the correction/forgery command means 120. .

(Effect) Therefore, when the stop mode is selected by the passenger's operation,
Air blowing capacity and cooling capacity are fixed in a mode that stops the air conditioning equipment involved in each change.

Under a predetermined environment t: Since the suction mode and the blowout mode are fixed as long as they belong, under the predetermined environment, even if mode change command No. 13 is output by the mode change command means, it will not be received, and it will be unnecessary. There is no possibility that the current state will be damaged, and therefore, the object of item 1 can be achieved. (Embodiments) Hereinafter, embodiments 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 on the most upstream side of the air conditioning duct.
An inside/outside image switching door 5 is arranged at the part where the inside and outside images are separated, and by operating this intake door 5 with an actuator 6L, it is possible to select between inside air and outside air as the air to be introduced into the air conditioning duct 1. .

The blower 7 sucks air into the air conditioning dug 1-1 and blows it downstream, and an evaporator 8 and a heater core 9 are provided behind the blower 7.

The evaporator 8 includes a compressor 10 and a capacitor 11.
, liquid tank J2 and expansion valve 13
The compressor 1o is connected to the engine of the automobile via an electromagnetic clutch 5, and is controlled on and off by connecting and connecting the electromagnetic clutches 1 and 5. In the heater core 9, engine cooling water circulates and heats the air.An air mix door 16 is provided in front of the heater core 9. By adjusting the opening degree with the actuator 7, the amount of air passing through the heater core 9 and the amount of air bypassing the heater core 9 can be changed, and as a result, the temperature of the blown air can be controlled.

The flow side of the air conditioning duct 1-1 includes a defrost outlet 18, a vent outlet 1.9, and a P1 outlet 20.
The mode doors 22a and 22b are provided in the divided parts, and open into the vehicle compartment 21.
By operating actuators 23 and 22b, a desired blowing mode can be obtained.

The actuators 6.17, 23.24, the motor 7a of the blower 7, and the electromagnetic clutch 15 of the compressor ]-0 are controlled based on output signals from the microcomputer 26 via drive circuits 25a to 25e, respectively. . This microcomputer 26 includes a central processing unit (CPU) and a read-only memory (ROM) (not shown).
, a random access memory (RAM), an input/output port (Ilo), etc., and the microcomputer 2G is equipped with the temperature inside the vehicle from the temperature sensor 27 that detects the temperature inside the vehicle, and the outside air. The outside air temperature TA from the outside air temperature sensor 2B that detects the temperature of is selected via the multiplexer 29, converted to a digital signal via the A/D converter 30, and inputted.

The microcomputer 26 also includes an operation panel 31.
The output from (No. 5 is input. This operation panel 3) is an AIJT that cancels stop mode and manual operation state and sets all air conditioning equipment such as blowers to O1- state.
O switch 32, OFF switch 33 for commanding stop mode. The EC0N switch 34 economically controls the cooling capacity of the evaporator 1 notor 8 by stopping the compressor 1-O or switching from the normal operating state to an economical operating state, and the intake mode is set to internal air intake mode (RIEC) and outside air intake mode. (
FRESII), a DEF switch 36 that sets the air outlet mode to defrost mode, and a temperature setting device 37 that sets the temperature inside the vehicle. It is provided with a blowing capacity setting device 38 for setting the blowing capacity, and a blowing mode setting device 39 for setting the blowing mode other than the defrost mode.

The temperature setting device 37 has an up/down switch 40 a H
401) and a temperature display section 41 that digitally displays the set temperature 1''1), and an up/down switch 40a.

The set temperature shown on the temperature display section 41 can be changed within a predetermined range by operating the temperature display section 40b. ). Further, the blower capacity setting device 38 includes a FAN switch 42 that changes the rotation level of the blower 7 and a level display section 43 that displays the current rotation level.
By operating the N switch 42, the mode of air blowing ability is stopped (level O), LO (level 1), ID (level 2), H
I (Level 3).

The levels are switched sequentially in the order of MAX HI (level 4), and the word "MANUAL" lights up in the second part of the level display section 43.

Furthermore, the mode setting device 39 includes a MODE switch 4 that sequentially switches the blowing mode in the order of vent, pie level, and heat.
4, and a pictorial display section 45 that indicates the current balloon mode by pictorial display.
The air flow arrows 45a and 45b of No. 5 are illuminated to indicate the selected blowout mode, and the characters "M A N U A L" are illuminated in the second part of the picture display section 45. It has become. These lighting displays and each display section 41
, 43.45 are controlled by the microcomputer 2G via the display circuit 46.

In FIG. 3, an example of controlling the air conditioner by the microcomputer 26 described above is shown as a flowchart 1-, in which the microcomputer 26 starts executing the program from step 50 when the main switch is turned on, and starts executing the program from step 52. At this point, signals from the sensors 27, 28 and the operation panel 31- are input. Then, in the next step 54, the automatic control state of each air conditioning device such as the intake door is determined based on the output signal from the environmental signal generating means described above. That is, the processing performed here is
The basic parameters for controlling the air conditioning equipment based on the set temperature TD, the vehicle interior temperature 'rR1 and the outside air temperature TA (
For example, it calculates a comprehensive signal corresponding to the heat load in the vehicle interior, or the necessary blowout temperature, etc.), and calculates control signals for each air conditioning device based on this reference parameter.

In the next step 5G to step 68.

The above-mentioned OFF switch 33 of the air conditioning panel 31, FAN
Processing is performed when the switch 42, etc. is operated by the passenger's will, and first, in step 56, the OFF switch 3 is turned off.
3 is operated and a stop mode command is issued, and if it is determined in step 5G that the stop mode is not present, in the next step 58 it is determined whether the intake switch 35 is operated or not. When it is determined that the intake switch 35 has not been operated, it is determined in the next step 60 whether or not the air outlet mode switch 44 has been operated, and it is determined that the air outlet mode switch 44 has not been operated. Once determined, the next step 62
In step 64, it is determined whether or not the FAN switch 42 has been operated, and if it is determined that the FAN switch 42 has not been operated, it is determined in the next step 64 whether or not the E CON switch 34 has been operated, and the E When it is determined that the CON switch 34 is not operated, it is determined in the next step 66 whether or not the DHF switch 36 is operated, and when it is determined that the DEF switch 36 is not operated, the primary In step 68 of AU
It is determined whether the TO switch 32 has been operated, and A11
If TO switch 32 is not operated, switch 7o
After proceeding to step 70, the air mix door 16 is automatically controlled to the state determined in step 54, and then returning to step 52.

In steps 58 to 66, intake switch 3
5. Blowout mode switch 44. FAX switch 42,
When it is determined that each of the EC0N switch 34 and the DEF switch 36 has been operated, the suction mode, blowout mode, air blowing capacity, and cooling capacity are determined by operating the corresponding switches, and control signals therefor are sent to the drive circuit 25. a + 21) Output to CI25d, 25e and manually set (steps 72 to 80)
In addition, if it is determined in step 68 that the AUTO switch 32 has been operated, the control signal calculated in step 54 is transmitted to the drive circuit (258 to・Output via 25e) and automatically control each air conditioner (step 8
2), the process returns to step 52.

By the way, if it is determined in step 56 that the OFF switch is operated and a stop mode command is issued, the process proceeds to step 848.
, the absolute value of the difference between the set temperature TD and the vehicle interior temperature TR (ITD-TRI) is within a predetermined value (for example, 3°C), and the interior of the vehicle is in an environment that is almost close to the temperature control set at 11 standards. Determine whether or not.

If it is determined in step 84 that the absolute value (ITO-TRI) is smaller than the predetermined value □, the process proceeds to step 86, and the blower '7 and compressor 10 are stopped J:.

Then, in the first step 88, the suction mode and blowout mode are turned off.
It is fixed to the state immediately before the F switch 33 is pressed, or to the state immediately before the absolute value (ITD-TRI) becomes smaller than 1 if manually set in steps 96 and 102, which will be described later.

On the other hand, in step 84, the absolute value (ITD−'I”
Rl) If the value is greater than 1, the process proceeds to step 90, where the blower 7 and the kelp 1 nose 10 are similarly stopped, but the suction mode and the blowout mode are changed according to the occupant's operation in the following steps 92 to 102. It is possible to change the mode. That is, in step 92, it is determined whether the intake switch 35 has been operated or not. If it has not been operated, the intake mode is set to outside air intake mode (FRESH) and fixed in order to ensure the demisting function of the window glass. If the intake switch 35 is operated, the intake mode is manually set to the selected mode (step 9G), and then the process proceeds to step 98. Then, in step 98, it is determined whether or not the mode switch 44 has been operated. If not, the blowout mode is fixed (step 100) in the same way as in step 88, and if it has been operated, it is not selected. Manually set the blowout mode to the selected mode (Step 10)
2).

Next, in step 104, it is determined whether the outside air temperature TA is lower than a predetermined value Kz (for example, 20°C) and the environment is such that demisting capability must be ensured. If the small number is 1, proceed to Step 06 and set the suction mode to FRESH, the blowout mode, and the defrost mode, and then fix them.Meanwhile,
If TA is greater than 2, the states set in steps 86 to 102 are maintained, and the absolute value (ITD-TRI
) The inhalation mode and the blowout mode can be changed at the passenger's will as long as the value is 1 or more. Then, the process proceeds to step 62, where the FAX switch 42, EC0N switch 34, DEF switch 36, and A11TO switch 3 are switched.
2 is operated, the stop mode is canceled.

In this embodiment, step 84 is used to control the stop mode.
Although the control associated with the environmental conditions of step 104 and the control associated with the environmental conditions of step 104 are included, either one may be used, and if only the control associated with the environmental conditions of step 84 is required, steps 84 to 102 are configured, and the control associated with the environmental conditions of step 104 is included. If only the control associated with the environmental conditions of step 1-04 is to be performed, step 84 may be replaced with the content of step -O4, and step 88 may be replaced with the content of step 106, and printing may be performed in steps 84 to 102.

(Effect of the invention) As described above, according to the present invention, the stop 1-mo.
Even if the mode is selected, the output signal from the mode change command means will not be received as long as the environment is in a predetermined environment. In this case, it is possible to prevent outside air from entering even if outside air intake is commanded by the mode change command means,
In addition, when the outside temperature of the vehicle is low, which requires Demis 1-, the blowout mode and intake mode are fixed so that warm air is not blown onto anything other than the window glass, or the introduction of outside air is not blocked. It is possible to maintain comfortable temperature control and safety while driving.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing the present invention, FIG. 2 is a configuration diagram showing an embodiment of the invention, and FIG. 3 is a flowchart showing an example of control of a microcomputer used in the above embodiment. 110...Environmental signal generation means, 1-20...Mode change command means, 130...Stop mode command means, 14
0... Judgment means, 150... Control means. Figure 1

Claims (1)

[Scope of Claims] Environmental signal generating means including at least means for setting the temperature inside the vehicle interior and means for detecting the temperature inside and outside the vehicle interior, and all or part of the ventilation capacity, cooling capacity, suction mode, and blowout mode. a mode change command means for generating a command signal for changing the mode by an operation of the passenger; a stop mode command means for generating a command signal for a stop mode by the operation of the passenger; when a stop mode command signal is output by the stop mode command means and a determination means for determining whether or not the stop mode belongs;
The operation of the air conditioning equipment involved in changing the air blowing capacity and the cooling capacity is stopped, and the suction mode and the blowing mode are fixed when it is determined by the determination means that they belong to a predetermined environment, and when it is determined that they do not belong to the predetermined environment. A control device for a vehicle air conditioner, comprising: control means for changing the mode according to the output of the mode change command means;