JPH0840054A - Air-conditioning control device for vehicle - Google Patents

Abstract

PURPOSE:To use a manually set operation mode even at automatic operation time by providing a means to judge whether or not a compressor operation mode set by a setting means is realized. CONSTITUTION:An air-conditioning control device is provided with a setting means 160 composed of an A/C switch 31 to set a dehumidifying mode to forcibly operate a compressor 13, an ECO switch 32 to set a motive power-saving mode to retrain and operate the compressor 13 and an AUTO switch 37 to automatically operate air-conditioning control including compressor control and a judging means 170 to judge whether or not the dehumidifying mode or the motive power-saving mode set by this satisfies a prescribed condition, and is provided with an automatic mode time setting means 180 to set the humidifying or motive power-saving mode set by the setting means 160 as the compressor control when automatic operation is started by the AUTO switch 37 in the case where a judgement is made that the dehumidifying or motive power-saving mode is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioning control device having a dehumidifying mode for forcibly operating a compressor and a power saving mode for suppressing and operating the compressor.

[0002]

2. Description of the Related Art A conventional vehicle air conditioner, for example, Japanese Patent Publication No. 6
The one disclosed in Japanese Patent Publication No. 2-30934 has a storage means for storing the operation content once operated by the operator in an operating environment satisfying a predetermined condition, and stores the operation content in the storage means at the time of re-operation. When the same operating environment condition as that at the time is realized, the control is performed by the content stored in the storage means.

[0003]

However, in this reference, when the manual selection is made, the environmental condition is stored every time, and it is calculated whether or not the stored environmental condition and the current environmental condition match. Since it is necessary, not only is an enormous amount of memory required, but also a considerable amount of memory for calculation is required, which is not practical at present.
Further, since the control is stopped during the arithmetic processing time, there is a problem that a good air conditioning state cannot be obtained.

Further, in the conventional air conditioning control, particularly, in the compressor control, the dehumidifying mode in which the compressor is forcibly driven for the purpose of improving the frost clearing ability and the compressor is suppressed to prevent overcooling when the air conditioning is stable. There is a power-saving mode in which the vehicle is driven, and it is necessary to manually set it in order for these controls to be executed according to the passenger's request. Further, in the past, since this setting was automatically canceled by turning on the auto switch, it was necessary to manually set again when the occupant made the above request.

Therefore, the present invention is to provide a vehicle-like air-conditioning control device which can use the compressor control mode set by a manual even during automatic operation.

[0006]

Therefore, the present invention is
In the air conditioning duct, a blower and at least a compressor,
In a vehicle air conditioning control device having an evaporator that constitutes a cooling cycle together with a condenser and an expansion valve, a heater core as a heating means, and a mix door that adjusts the amount of air passing through this heater core, operation of the compressor in manual mode Setting means for setting the mode, determining means for determining whether the operating mode of the compressor set by this setting means is established, and when it is determined by this determining means that the operating mode of the compressor is established, And an automatic mode setting means for replacing the operation mode of the compressor during automatic operation with the operation mode set by the setting means.

More specifically, the present invention relates to an A / C switch for setting a dehumidifying mode for forcibly operating the compressor, an ECO switch for setting a power saving mode for suppressing and operating the compressor, and a compressor control. And a dehumidifying mode or a power-saving mode set by the setting means for automatically controlling the air-conditioning control including an AUTO switch satisfy predetermined conditions (such as continuous setting for a predetermined time or longer). If it is determined that the dehumidifying mode or the power saving mode is established by the determining unit that determines whether or not (established), the compressor control when the automatic operation is started by the AUTO switch is performed. Setting in automatic mode to set dehumidification mode or power saving mode set by the setting means In that it comprises a stage.

Further, it is preferable that the determination of the establishment of the operating mode by the determining means is established when the operating mode is continuously executed for a predetermined time (claim 2), and the operating mode is further executed. It may be determined that the condition is established when the accumulated time reaches a predetermined time.

[0009]

Therefore, in the present invention, the operating mode of the compressor control is set by the setting means,
When the determining means determines that the operating mode is established, the automatic mode restarting means restarts the automatic mode because the automatic mode setting means can set the compressor control during the automatic operation to the operating mode set by the setting means. Even if it is performed, the above-mentioned problem can be achieved because the compressor control is performed in the set operation mode.

Furthermore, when the operating mode continues for a predetermined time, or when the operating cumulative time of the operating mode reaches the predetermined time, the operating mode in the automatic mode is set, so that the passenger's request Since the strength or the required frequency will be reflected in the air conditioning control,
A comfortable air conditioning can be obtained.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

The vehicle air conditioning controller 1 shown in FIG. 1 has an intake unit 3 on the most upstream side of the air conditioning duct 2.
The intake unit 3 has an inside air introduction port 4 communicating with a vehicle interior (not shown) and an outside air introduction port 5 communicating with the outside of the vehicle compartment, and the intake selectively opening the inside air introduction port 4 and the outside air introduction port 5. A door 6 is provided.

A blower 7 is arranged downstream of the intake unit 3. This blower 7 is a fan 8 for blowing air.
And a motor 9 for driving the fan 8. Normally, a sirocco fan is used as the fan 8 and a brushless motor is used as the motor 9. In the embodiment of the present invention, the inside air inlet 4 or the outside air is used. The shape and type are not limited as long as the air is sucked from the introduction port 5 and blown to the downstream side of the air conditioning duct 2.

On the downstream side of the blower 7, an evaporator 11 which constitutes a part of the cooling cycle 10 is arranged as a heat exchanger for cooling. This cooling cycle 10 is configured by at least an evaporator 11, a receiver dryer 12, a compressor 13, a condenser 14, and an expansion valve 15 that are connected in series by piping. The refrigerant compressed by the compressor 13 is condensed by the condenser 14, Since the heat of the air passing through the evaporator 11 can be released from the condenser 14 to the outside of the vehicle through the refrigerant by adiabatic expansion by the expansion valve and evaporation by the evaporator 11, the air passing through the evaporator 11 is cooled. can do.

The compressor 13 of this embodiment is driven by being connected to a running engine (not shown) through the electromagnetic clutch 43, but it may be driven by an external electric motor. An electric motor may be installed inside the compressor, and its drive system is not particularly limited.

A mix door 16 is arranged downstream of the evaporator 11, and a heater core 17 as a heat exchanger for heating is provided in one of the passages opened and closed by the mix door 16.
Is provided, and the other of the passages serves as a bypass passage 18 that bypasses the heater core 17. As a result, the air that has passed through the evaporator 11 and is cooled is divided into air that passes through the heater core 17 and air that bypasses, depending on the opening of the mix door 16.

In this embodiment, the passage is opened and closed by the single mix door 16. However, it is substantially possible to interlock a plurality of mix doors depending on the shape of the air conditioning duct 2 or the arrangement of the heater core 17. In addition, although there is one that divides into air that passes through the heater core 17 and air that bypasses, there is no particular limitation. Also,
There is a type in which a submix door is provided on the downstream side of the heater core 17 to prevent the heat influence of the heater core 17, but whether or not the submix door is provided is not particularly limited.

At the most downstream side of the air conditioning duct 2, three air outlets 19, 20, 21 which open into the vehicle compartment are opened, and are selectively opened and closed by a mode door 22. The air outlet 19 communicates with the differential air outlet, the air outlet 20 communicates with the vent air outlet, and the air outlet 21 communicates with the foot air outlet via a duct (not shown).

In the vehicular air-conditioning control device 1 having the above-described structure, the inside air, the outside air, or a mixture thereof selected by the intake door 6 by the operation of the blower 7 is first cooled by passing through the evaporator 11. This cooled air is supplied to the heater core 1 by the mix door 16.
The air that has passed through the heater core 17 and the air that bypasses the heater core 17 is divided into the air that passes through the heater core 17 and the bypass air. The temperature of the air is adjusted to 1, and the air outlet 1 selected by the mode door 22
It is blown out into the passenger compartment via 9, 20, and 21.

The vehicle air conditioning control device 1 is also provided with a microcomputer 23 for driving each control device. The microcomputer 23 includes a central processing unit (CPU), a read-only memory (ROM),
Random access memory (RAM), I / O port (I
/ O) and the like, which are known per se, and which detect at least the temperature of the evaporator 11 or the temperature (Te) of the air blown from the evaporator 11, the temperature sensor 25 for detecting the outside air temperature (Ta), Signals from a temperature sensor 26 that detects a temperature (inside air temperature) (Tr) and a solar radiation sensor 27 that detects a solar radiation amount (Qsun) are input via a multiplexer (MPX) 28 and an A / D converter 29, and Various setting signals from the operation panel 28 described below are input, processed according to a predetermined program, and then output control signals to each control device.

More specifically, the intake door 6 is controlled by a control signal for controlling the actuator 40a for driving the intake door 6, and the mix door 16 is controlled by a control signal for controlling the actuator 40b for driving the mix door 16. The door 22 is controlled by a control signal that controls the actuator 40c that drives the mode door 22, the motor 9 that drives the fan 8 is driven via the drive circuit 41, and the electromagnetic clutch 43 is driven by the drive circuit 4.
It is controlled via 2.

The operation panel 30 includes a compressor 13
A / C switch 31 for operating the air conditioner, ECO switch 32 for setting the air conditioning control to the power saving mode, FAN switch 33 for setting the air flow rate, MODE switch 34 for setting the blowing mode, and up switch 35 for setting the passenger compartment temperature.
a and a temperature setting device 35 including a down switch 35b,
OFF switch 36 for stopping the air conditioning control, AUTO switch 37 for setting the air conditioning control to the automatic mode, DEF switch 38 for setting the blowing mode to the differential blowing mode, and repeatedly setting the introduction air mode to the outside air introduction mode and the inside air circulation mode. It has a momentary type REC switch 39, and the setting status is displayed on the display section 50. Specifically, the blowing mode is displayed on the blowing mode display 51, and in the case of the automatic mode, the AUT
The O display 52 is displayed, and when the A / C switch is turned on, the A / C display 53 is displayed and the temperature setting device 3
5, the set temperature is displayed on the temperature display 54.

The control executed by the microcomputer 23 will be described with reference to the functional block diagram of FIG. 2. In block 100, the heat load detecting means detects a heat load signal. Specifically, the set temperature Tset by the temperature setter 35, the inside air temperature Tr, and the outside air temperature Ta.
And the solar radiation amount Qsun are detected, and the next block 11
In the target outlet temperature (Xm) calculating means of 0, the target outlet temperature Xm is calculated by the following formula 1 as a comprehensive heat load signal as a control factor during automatic operation.

[0024]

## EQU1 ## Xm = ATset-BTr-CTa-DQsun + E

A, B, C and D are calculation gains,
E is a correction term.

Target blowout temperature Xm obtained by this
Based on the above, the blower voltage calculation means of the block 120 calculates the voltage of the blower 7 corresponding to the air flow rate, and the blower 7 is controlled according to the calculation result. In particular,
Depending on the target outlet temperature Xm, the higher the cooling request or the heating request, the larger the amount of air blown.
Further, the mix door opening calculating means of the block 130 calculates the mix door opening corresponding to the optimum blown air temperature and controls the mix door 16.

Specifically, the lower the target outlet temperature X _{m, the} higher the cooling demand, and the larger the bypass amount, and the larger the bypass amount, and the higher the target outlet temperature, the higher the heating demand. The opening is increased to increase the amount of air passing through the heater core 17. Further block 1
The outlet determination means of 40 determines one of the outlets 19, 20, and 21 that is suitable for air conditioning control. Specifically, when the cooling demand is high, a large amount is blown out from the vent outlet, and when the heating demand is high, a large amount is blown out from the foot outlet.

Further, in the suction port determining means of the block 150, the internal air circulation mode (R
EC), the intake door 6 is controlled so as to be in the outside air circulation mode (FRE) when the heating demand is high. In the present embodiment, particularly, the mixed mode (between the outside air introduction mode and the inside air circulation mode) MIX) can be set.

Further, the vehicle air conditioning control device 1 includes
Embodiments according to the present invention include blocks 160 through 19
Indicated at 0. In this embodiment, setting means 160 for setting the operation mode of the compressor in the manual mode, determination means 170 for determining whether or not the operation mode of the compressor 13 set by the setting means 160 is established, and this determination When it is determined by the means 170 that the operation mode of the compressor 13 is established, the operation mode setting means 180 for replacing the operation mode of the compressor 13 during automatic operation with the operation mode set by the setting means 160 is provided. Especially.

More specifically, the configuration of this embodiment is set as follows: an A / C switch 31 for setting a dehumidifying mode for forcibly operating the compressor 13, and an ECO for setting a power saving mode for suppressing and operating the compressor 13. A switch 32 and a setting means 160 including an AUTO switch 37 for automatically controlling the air conditioning including the compressor control;
A determination means 170 for determining whether or not the dehumidification mode or the power saving mode set by the setting means 160 satisfies (is satisfied) a predetermined condition (such as being continuously set for a predetermined time or longer); When the determination unit 170 determines that the dehumidifying mode or the power saving mode is established, the dehumidifying mode or the power saving mode set by the setting unit 160 is set as the compressor control when the automatic operation is started by the AUTO switch 37. And an automatic mode setting means 180 for setting.

The control of this embodiment will be described with reference to the flow charts shown in FIGS. 3 and 4. In the compressor control started from step 200, a jump command, a timer interrupt or the like from the main control routine for air conditioning control. The above-mentioned signal is input in step 210, and the above-mentioned target outlet temperature Xm is calculated in step 220.

In step 230, it is determined whether the defrost (DEF) switch 38 has been turned on. In this judgment, the DEF switch 3
When it is determined that 8 is input, the routine proceeds to step 300, where the dehumidifying mode described below is set as the control of the compressor 13. If it is determined in step 230 that the DEF switch 38 has not been turned on, the process proceeds to step 240, and it is determined whether or not the off (OFF) switch 36 has been turned on (ON). In this determination, if it is determined that the OFF switch 36 has been turned on, the routine proceeds to step 280, where the OFF mode of the compressor is set (the compressor is stopped).

In the judgment of step 240, OF
When it is determined that the F switch 36 is not turned on,
Proceed to step 250 and switch to AUTO (AUTO) switch 3.
It is determined whether or not 7 has been input. If it is determined in this determination that the AUTO switch 37 has been turned on, the process proceeds to step 370 shown in FIG. 4, and it is determined whether or not the AUTO dehumidification mode is set.

If it is determined in step 370 that the dehumidifying mode is set, the process proceeds to step 400 and the dehumidifying mode shown in the box in step 400 is set. In this dehumidification mode, the target evaporator temperature Te '
By forcibly operating the compressor 13 by setting the value lower than that during normal control, whereby the air passing through the evaporator 11 can be cooled to dehumidify the air passing through the evaporator 11. Is. The compressor 13 is controlled so that the deviation between the target evaporator temperature Te 'and the actual evaporator temperature Te is within a predetermined range.

If it is determined in step 370 that it is not in the AUTO dehumidification mode, the process proceeds to step 380. If the difference between the target outlet temperature Xm and the outside air temperature Ta is equal to or more than the predetermined value m, the process proceeds to step 410. Then, the compressor 13 is set to the OFF mode. If the difference between the target outlet temperature Xm and the outside air temperature Ta is less than or equal to the predetermined value n in the determination of step 380, the process proceeds to step 390 and the power saving mode shown in step 390 is set. This power saving mode uses the target outlet temperature X
The characteristic of the target evaporator temperature Te 'set from m is set to a level higher by a predetermined value than in the case of normal control.
As a result, the operation of the compressor 13 is suppressed more than in the case of the normal control, so that power saving can be achieved. After the control of steps 390, 400 and 410, the procedure returns from step 420 to the main control routine.

If it is determined in step 250 that the AUTO switch is not turned on, step 2
In step 60, it is determined whether the A / C switch 31 is turned on (ON). In this determination, when it is determined that the A / C switch 31 is turned on, the routine proceeds to step 300, where the dehumidification mode is set in the compressor control.

If the A / C switch 31 is not turned on in the determination in step 260, the process proceeds to step 270 and the economy (ECO) switch 32 is selected.
It is determined whether or not is turned on (ON). If the ECO switch 32 is turned on in this determination, the power saving mode of the compressor 13 is set, and if not, the routine proceeds to step 280, where the compressor 13 is set to the off mode.

After the operation mode of the compressor 13 is set to the power saving mode or the dehumidifying mode in the step 290 or the step 300, the step 3
In step 10, it is determined whether the compressor control during automatic operation (auto) is set to the dehumidification mode. If it is determined that the dehumidification mode is set in the automatic mode, the process proceeds to step 320. , A / C switch 31 satisfies a predetermined condition and is established. The predetermined condition here means that a predetermined time has elapsed after the A / C switch 31 was turned on, in other words, the dehumidification mode was continuously executed for a predetermined time when the A / C switch 31 was turned on. Further, the predetermined condition may be that the switch closing times are added several times and the added time reaches the predetermined time.

In the determination at step 320, A /
If it is determined that the C switch 31 has been closed, the process proceeds to step 330 to set the automatic dehumidification mode. As a result, when the automatic operation is started by turning on the AUTO switch 37, it is possible to proceed to step 400 in the determination of the step 370, so that the dehumidifying mode can be set in the automatic mode.

If it is determined in step 320 that the A / C switch 31 is not turned on,
The conventional setting is continued to return to the main control routine via step 360.

If it is determined in step 310 that the compressor control setting during automatic operation is not in the auto dehumidification mode, the process proceeds to step 340 and it is determined whether the ECO switch 32 satisfies a predetermined condition. To do. The predetermined condition here is that a predetermined time has elapsed after the ECO switch 32 was turned on, in other words, E
That is, the power saving mode is continuously executed for a predetermined time by turning on the CO switch 32. Further, the predetermined condition may be that the switch closing times are added several times and the added time reaches the predetermined time.

In the determination at step 340, EC
If it is determined that the O switch 32 has been closed, the routine proceeds to step 350, where the automatic power saving mode is set. As a result, when the automatic operation is started by turning on the AUTO switch 37, the step 370 is performed.
Since it is possible to proceed to step 380 in the above judgment, it is possible to set the power saving mode or the OFF mode in the automatic mode.

If it is determined in step 340 that the ECO switch 32 is not turned on,
The conventional setting is continued to return to the main control routine via step 360.

[0044]

As described above, according to the present invention, when the operating mode of the compressor control is set by the setting means and the determining means determines that the operating mode is established, the automatic mode setting is performed. By means of the means, the compressor control during automatic operation can be set to the operation mode set by the setting means,
Since the compressor control is executed in the set operation mode even when the automatic operation is restarted, it is possible to control the compressor in the operation mode that matches the passenger's request, so that comfortable air conditioning can be obtained. it can.

Further, since a large amount of memory is not required to execute the above control, a large amount of memory can be used in the arithmetic system, and the arithmetic capacity can be improved, so that it meets the requirements of the passengers. It is possible to quickly shift to the air conditioning mode.

Further, when the determining means determines that the operating mode has continued for a predetermined time, or when it is determined that the accumulated operating time of the operating mode has reached the predetermined time, the operating mode in the automatic mode is set. By making the setting, the strength or frequency of the passenger's request is reflected in the air conditioning control, so that comfortable air conditioning can be obtained.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a vehicle air conditioning control device according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of control executed by a microcomputer of the vehicle air conditioning control device according to the embodiment of the present invention.

FIG. 3 is a flowchart showing a part of control of the vehicle air conditioning control device according to the embodiment of the present invention.

FIG. 4 is a flow chart diagram showing the remaining part of the control of the vehicle air conditioning control device according to the embodiment of the present invention.

[Explanation of symbols]

 1 Vehicle Air Conditioning Control Device 2 Air Conditioning Duct 7 Blower (Blower) 10 Cooling Cycle 11 Evaporator 13 Compressor 14 Condenser 15 Expansion Valve 16 Mix Door 17 Heater Core 22 Mode Door 31 A / C Switch 32 ECO Switch 37 AUTO Switch 38 DEF Switch 39 REC switch

Claims (3)

[Claims] 1. An air-conditioning duct, an air blower, an evaporator that constitutes a cooling cycle together with at least a compressor, a condenser, and an expansion valve, a heater core as a heating means, and a mix door that adjusts the amount of air passing through the heater core. In a vehicle air conditioning control device having: a setting means for setting the operation mode of the compressor in a manual mode; a determination means for determining whether or not the operation mode of the compressor set by the setting means is established; The automatic mode setting means for replacing the operating mode of the compressor during automatic operation with the operating mode set by the setting means when it is determined by the means that the operating mode of the compressor has been established. Air conditioning control system for vehicles. 2. The vehicle air conditioning control device according to claim 1, wherein the determination of the establishment of the operating mode by the determining means is established when the operating mode is continuously executed for a predetermined time. 3. The vehicle according to claim 1, wherein the determination of the establishment of the operating mode by the determining means is established when an accumulated time of executing the operating mode reaches a predetermined time. Air conditioning control device.