JPH0672131A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To obviate the trouble of operation and to pay regard to occupant's intention by automatically switching the air-conditioning operation back to control under a first controlling means when a prescribed period of time has elapsed after a desired air-conditioning operation is switched from a controlling state under the first controlling means to that under a second controlling means. CONSTITUTION:A controller 21 is provided with a first controller, which controls various kinds of air conditioning operations for an air conditioning unit 1, based on the signals from sensors for a temperature of a heater core 15, temperatures of the air in the inside and the outside, and the quantity of solar radiation, and a second controller, which sets the quantity of various kinds of air conditioning operations by using a control panel 30 and, based on the values thus set, controls the first air conditioning unit 1. If a controlling state under the first controller is switched to that under a second controlling means associated with the setting by means of the control panel 30, when a prescribed period of time has elapsed, the system is automatically switched back to the control under the first controller. Accordingly, troublesomeness is removed from the main driving operation, and air conditioning operation in which occupant's intention is though much of can be carried out. In addition, even if the air conditioning state within the car is deviated from the prescribed conditions, the air conditioning state can be prevented from getting worse.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner for adjusting the temperature and humidity conditions of the air inside the vehicle compartment by circulating the inside air and introducing the outside air.

[0002]

2. Description of the Related Art For example, as shown in FIG. 6, an air conditioner for a vehicle is switched by an inside / outside air switching damper 61 and an inside / outside air switching damper 61 for switching the air introduced into the passenger compartment between the inside air and the outside air. A blower fan 62 that introduces and blows the introduced air, an evaporator 63 that dehumidifies and cools the introduced air, a heater core 65 that heats the air that has been dehumidified and cooled once, and the ratio of the air that is sent to the heater core 65 is adjusted. Air mix door 64 for
Several air outlets for blowing air into the passenger compartment, for example, a vent outlet 68 provided at the center of an instrument panel (not shown) for blowing conditioned air to the chest and an conditioned air blowing to the feet. Heat outlet 67 /
It consists of 67 mag.

Further, in the above vehicle air conditioner, the cold air bypass 6 for guiding the cool air directly from the outlet side of the evaporator 63 to the vent outlet 68 without passing through the heater core 65.
6 is provided, and a cold air bypass door 66a for controlling the blowing of cold air to the vent outlet 68 is provided on the outlet side of the cold air bypass 66. The open / close control of the cold air bypass door 66a is performed by the cold air bypass door actuator 73.

By the way, when the air conditioner is set to the heating mode and the vehicle is driven for a long period of time, it may give a feeling of mist. In such a case, in the vehicle air conditioner configured as described above, the cold air bypass door 66a is opened,
By blowing out cool air from the vent outlet 68, it is possible to eliminate the muddy feeling.

However, in the above-described vehicle air conditioner, in order to blow out the cool air from the vent outlet 68, the occupant must directly open and close the cold air bypass door 66a by operating a lever or the like, which makes the operation troublesome. I was there.

Therefore, in order to solve the above-mentioned problems, Japanese Patent Laid-Open No. 63-31813 discloses, as shown in FIG.
There is disclosed a vehicle air conditioner further provided with an outside air temperature sensor 71 and a timer 72 for measuring an elapsed time from engine start. In this vehicle air conditioner, the control device 70 is operated when the outside air temperature detected by the outside air temperature sensor 71 is less than or equal to a predetermined value and the timer 72 measures a predetermined time.
Controls the cold air bypass door actuator 73 based on the detection signal to automatically introduce the cold air into the vehicle compartment by opening the cold air bypass door 66a, and closes the cold air bypass door 66a after a lapse of a predetermined time. ing. In such a vehicle air conditioner, since the opening / closing of the cold air bypass door 66a is automatically controlled, it is possible to eliminate the conventional opening / closing operation by the occupant.

[0007]

However, in the vehicle air conditioner having the above-described structure, the cold air bypass door 66a is forcibly opened by the manual switching means (not shown) when the opening / closing of the cold air bypass door 66a is automatically controlled. If
Since the automatic control of the opening and closing of the cold air bypass door 66a is released, in order to close the cold air bypass door 66a due to the deterioration of the air conditioning state in the vehicle compartment due to the forced opening of the cold air bypass door 66a. It must be closed again by the manual switching means described above. Also,
In order to return the opening / closing of the cold air bypass door 66a to the automatic control, it was necessary to re-operate the automatic air conditioner switch for operating the automatic control of the air conditioning operation of the air conditioner. Therefore, when the opening / closing of the cold air bypass door 66a is switched from the automatic control to the manual control, there is a problem that the operation for returning to the automatic control is troublesome.

Therefore, the present invention has been made in view of the above problems, and an object thereof is to control the air conditioning means from the control based on the state quantity such as the outside temperature by the first control means to the second control means. After switching to the desired air-conditioning operation, the occupant's intention to switch the air-conditioning means from the control by the first control means to the air-conditioning operation by the second means while removing the troublesome operation when returning to the first control means again. It is to provide a vehicle air conditioner that is respected.

[0009]

An air conditioner for a vehicle according to a first aspect of the invention has an air conditioning means for adjusting at least the temperature state of the air in the vehicle compartment by circulating the inside air and introducing the outside air, and the air conditioning state in the vehicle compartment. Detecting means for detecting the state quantity such as the outside air temperature, setting means for manually setting the desired air conditioning operation in the air conditioning means, and the air conditioning means for the state quantity such as the outside air temperature detected by the detecting means. In a vehicle air conditioner comprising: a control means having a first control means for controlling on the basis of and a second control means for controlling on the basis of the setting of the air conditioning operation set by the setting means,
When the desired air conditioning operation is switched from the state in which the air conditioning unit is controlled by the first control unit to the control by the second control unit by the setting unit, after a predetermined time has elapsed, the control unit reconfigures It is characterized in that the control is automatically switched to the control by one control means.

A vehicle air conditioner according to a second aspect is the vehicle air conditioner according to the first aspect, wherein the control means controls the desired air conditioning by the setting means when the air conditioning means is controlled by the first control means. When the operation is switched to the control by the second control means, and when the air-conditioning state in the vehicle compartment deviates from the predetermined condition after a predetermined time has passed, the control is switched to the control by the first control means again. .

[0011]

According to the configuration of claim 1, when the desired air conditioning operation is switched from the state in which the air conditioning operation is controlled by the first control means to the control by the second control means, Since the air-conditioning operation is performed again by the first control means, when the air-conditioning operation once switched to the second control means is returned to the control by the first control means as in the conventional case, the various air-conditioning operations are performed again. It is possible to eliminate the troublesome operation such as switching to the control by the control means, and to perform the air conditioning operation while respecting the occupant's intention to switch from the automatic control to the manual control desired by the occupant. In addition, after switching the air conditioning operation from automatic control to manual control, after a predetermined time has passed,
Since the automatic control is switched to again, it is possible to suppress deterioration of the air conditioning state in the vehicle interior.

According to the structure of claim 2, when the air conditioning operation is switched from the state controlled by the first control means to the state controlled by the second control means, after a predetermined time elapses, the air conditioning state in the vehicle interior Is deviated from the predetermined condition, the control is switched to the control by the first control means again, so that the deterioration of the air-conditioning state in the vehicle interior can be prevented.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to FIGS.

As shown in FIG. 1, the vehicle air conditioner of this embodiment includes a blower unit 2 for taking in the outside air or the inside air and sending it into the passenger compartment, and a cooling unit 3 for cooling the air taken in by the blower unit 2. , A heater unit 4 that heats the air that has passed through the cooling unit 3, an air conditioning duct 5 that sends cooled or heated air into the vehicle interior, and the air that is sent by the air conditioning duct 5 is blown into the vehicle interior, which will be described later. An air conditioning unit 1 provided with each air outlet, an operation panel 30 as a setting means for setting an air conditioning operation in the air conditioning unit 1, and a control device 2 as a control means for controlling the driving of each of the drive units.
It consists of 1.

The blower unit 2 has an outside air intake 10
a, an inside air intake port 10b, an inside / outside air switching damper 13, and a blower fan 12 that takes in outside air or inside air through the air intake box 10 and sends it to the air conditioning duct 5, A blower motor 11 that drives the blower fan 12 to rotate is used. By controlling the opening / closing of the inside / outside air switching damper 13 by the inside / outside air switching damper drive actuator 22, outside air or inside air or an air mixed with outside air is introduced. Are introduced by switching. Further, by controlling the rotation of the blower motor 11, the amount of introduced air is adjusted.

The cooling unit 3 is also provided with an evaporator 14 for cooling the air sent from the blower unit 2 by the cooling action by vaporization of the liquid refrigerant. The evaporator 14 is provided with a cooling compressor 23 that sucks and compresses a refrigerant via an electromagnetic clutch 27 that is removably connected to an engine output shaft (not shown). The drive is controlled by controlling the separation / contact operation of the electromagnetic clutch 27.

The heater unit 4 is provided with a heater core 15 for heating the air passing through the cooling unit 3 and an air mix door 16 for adjusting the amount of air sent into the heater core 15. Mix door 16 to mix door actuator 24
By controlling the opening and closing with, the air whose temperature is adjusted by mixing the cooled air and the heated air (hereinafter, referred to as conditioned air) is fed into the vehicle interior.

Further, at the end of the air conditioning duct 5, in order to efficiently send the air conditioning air into the passenger compartment, a vent outlet 6 that blows out the air conditioning air toward the head and upper body of the occupant.
…, Heat outlet 7 that blows out conditioned air from the feet of the passengers,
Further, there are provided defroster outlets 8 ... For blowing out the conditioned air toward the window glass such as the windshield.

A vent door 17, a heat door 18 and a defroster door 19 are provided in order to adjust the amount of conditioned air blown from the vent outlet 6, the heat outlet 7, and the defroster outlet 8. The doors 17, 18 and 19 are opened and closed by operating the mode door actuator 25.

In addition, air (hereinafter referred to as cold air) cooled by the cooling unit 3 and sent out without passing through the heater unit 4 to the air conditioning duct 5 can be directly guided to the vent outlets 6. Is provided with a cold air bypass 9, and a cold air bypass door 20 is provided on the outlet side of the cold air bypass 9 for controlling the blowing of the cold air to the vent outlets 6. The open / close control of the cold air bypass door 20 is performed by the cold air bypass door actuator 26.

Further, as shown in FIG. 4, a control device 21 is provided to control the air conditioning unit 1. On the signal input side of the control device 21, a cooling water temperature sensor 51 for detecting the temperature of the cooling water of the heater core 15 and a vehicle interior temperature are detected as a state quantity detecting means that affects the air conditioning state of the vehicle interior. Inside temperature sensor 5 for detecting
2 and the room temperature near the occupant's head and the room temperature near the feet of the occupant in order to detect a muddy feeling.
An upper temperature sensor 52a and a lower temperature sensor 52b, an outside air temperature sensor 53 for detecting a temperature outside the vehicle, an insolation sensor 54 for detecting an insolation amount into the vehicle interior, and a detection signal of each of these sensors. A first control device (not shown) as a first control means for controlling various air conditioning operations of the air conditioning unit 1 and operation of various air conditioning operations such as temperature, air volume, or ON / OFF of air conditioning operation by the operation panel 30. A second control device (not shown) is provided as second control means for controlling the air conditioning unit 1 based on the set operation amount of the air conditioning operation after setting the amount. still,
Even if the air conditioning unit 1 is controlled by the first control device, if the desired air conditioning operation is set and changed by the operation panel 30, only the desired air conditioning operation is manually controlled by the second control device.

On the other hand, on the signal output side of the control device 21, the blower motor 11 and the compressor 2 are operated based on the signals sent from the various sensors and the operation panel 30 described above.
3, inside / outside air switching damper actuator 22, air mixing door actuator 24, mode actuator 2
5. By controlling the cool air bypass door actuator 26, the blower motor 11, the evaporator 14, the inside / outside air switching damper 13, the air mix door 16, the vent door 17, the heat door 18, the defroster door 19, and the cold air bypass door 20 are controlled. It has become.

Further, when the cold air bypass door 20 is automatically controlled, the controller 21 operates a cold air bypass door changeover switch 41, which will be described later, to forcibly and manually control the cold air bypass door 20. A timer controller 55 is provided for switching to automatic control again after a lapse of a predetermined time.

As shown in FIG. 5, the operation panel 30 includes a main switch 31 for turning on / off the operation of the air conditioning unit 1, a temperature adjusting lever 32 for setting the temperature inside the vehicle, An air volume adjusting lever 33 for adjusting the amount of air blown from the air outlet, a blowout mode changeover switch 42 for switching the air outlet for blowing out the conditioned air, and an air conditioner for temperature control, air volume control, etc. in the passenger compartment. Auto switch 3 for switching the operation to automatic control
9, an inside / outside air changeover switch 40 for switching between inside air circulation and outside air introduction, and a cold air bypass door changeover switch (hereinafter, referred to as B / P door switch) 41 for manually operating the opening / closing of the cold air bypass door 20. I have it.

The main switch 31, the auto switch 39, and the B / P door switch 41 are provided with recognition lamps 31a, 39 on the upper or upper surface of each switch.
a, 41a are provided, and these recognition lamps 31 are provided.
It is possible to determine whether or not the operation by the switch is performed by lighting a, 39a, 41a.

The temperature adjusting lever 32 can be set in temperature by sliding it based on the temperature scale 32a marked on the upper part.
In addition, when the temperature adjusting lever 32 is at the left end, the vehicle interior is fixed to maximum cooling, and when the temperature adjusting lever 32 is between 20-25-30 on the temperature scale 32a, the vehicle interior is set. Temperature control lever 32 automatically controls temperature
When is at the right end, the vehicle compartment is fixed to maximum heating.

The air volume adjusting lever 33 can also adjust the amount of air blown out from each air outlet (hereinafter referred to as air volume) by sliding the air volume adjusting lever 33 like the temperature adjusting lever 32. If the air volume adjusting lever 33 is located at the left end, the drive of the blower motor 11 or other drive unit inside the air conditioning unit 1 is stopped, and if it is in the AUTO position, the air volume and the temperature in the vehicle compartment are automatically controlled. The air volume can be adjusted steplessly if it is between MIN and MAX.

Further, the blowout mode changeover switch 42 has a defrost mode switch 34 for controlling air to be blown out from the defroster outlets 8 ..., And an air is blown out from the heat outlet 7 and the defroster outlets 8. Differential heat mode switch 35 to control
The heat mode switch 36 for controlling the air to blow out from the heat outlet 7, the vent outlet 6 ..., the bi-level mode switch 37 for controlling the air to blow out from the heat outlet 7, and the vent outlet 6 ... There is a vent mode switch 38 that controls air to be blown out from the vent mode switch 38.

Further, the blowout mode changeover switches 34 to 3 are included in the blowout mode changeover switches.
8 are provided with recognition lamps 34a to 38a, respectively, so that it is possible to immediately recognize which blowing mode is set depending on which recognition lamp is lit.

By operating the inside / outside air changeover switch 40, it is possible to switch between the inside air circulation for circulating the air in the vehicle compartment and the outside air introduction for introducing the outside air and circulating the air. At the upper part of the inside / outside air changeover switch 40, there are provided an outside air introduction recognition lamp 40a indicating an outside air introduction and an inside air circulation recognition lamp 40b indicating an inside air circulation, and which recognition lamp is turned on. It is possible to recognize whether it is the introduction of the outside air or the circulation of the inside air depending on whether or not it is present.

By the way, usually, the auto switch 39 is used.
When is turned on, the air conditioning unit 1 is automatically controlled by the above-mentioned first control device on the basis of the state quantity detection signals from various sensors. However, by directly turning on / off the switch provided on the operation panel 30, only the air conditioning operation is switched to the manual control by the second control means. Therefore, the opening / closing control of the cold air bypass door 20 described above can also be switched to the manual control which is the second control means by turning on the B / P door switch 41. The B / P door switch 41 is a touch-type switch, and is a recognition lamp 41a for recognizing whether the cold air bypass door 20 is open or closed.
When the B / P door switch 41 is operated when the cold air bypass door 20 is open, the cold air bypass door 20 is closed, and when the cold air bypass door 20 is closed, the B / P door switch is closed. When 41 is operated, the cold air bypass 20 is opened. In the thus-manually controlled cold air bypass door 20, the state quantity of the air conditioning state in the vehicle compartment is detected after a predetermined time has passed by the timer control device 55, and the detected state quantity deviates from the preset detection amount. In this case, the automatic control is switched again.

The control of the air conditioning unit 1 having the above structure will be described below with reference to FIGS.

First, when the ignition key is turned on, the control shown in FIG. 2 is performed.

First, initial setting of each flag described later is performed (S1). Then, the state quantity that affects the air conditioning state of the vehicle is detected by the detection means. That is, the cooling water temperature sensor 51 detects the temperature of the cooling water of the heater core 15, and the inside air temperature sensor 52 detects the temperature inside the vehicle.
The temperature of the outside air is detected by the outside air temperature sensor 53, the amount of heat from the sun is detected by the insolation sensor 54, and each detection signal as these various data is sent to the control device 2.
1 is read (S2). Next, based on the detection signal, the operating ratios such as the opening ratio of the air mix door 16, the setting of the air volume, and the driving amount of the compressor 23 are calculated (S3),
The opening / closing control of the air mix door 16 is performed based on these calculated amounts (S4), the amount of air blown out from each outlet is controlled (S5), and the drive amount of the compressor 23 is calculated to calculate the drive amount of the evaporator 14. Operation control is performed (S6). Further, the blowout mode is controlled by the control device 21 (S7).

Next, when the control device 21 controls the opening / closing of the cold air bypass door 20, the introduction of the cold air into the vehicle interior is controlled (S8), and whether or not to circulate the vehicle interior by the internal air circulation or the external air introduction. It is determined whether or not the inside / outside air is introduced (S9). Then, after the above-described series of control is performed, the process proceeds to S2 again.

The opening / closing control (S8) of the cold air bypass door 20 will be described below with reference to FIG.

In this figure, a first flag F ₁ (hereinafter simply referred to as F ₁ ) indicates an open / closed state of the cold air bypass door 20, and a second flag F ₂ (hereinafter simply referred to as F ₂ ) is a timer. indicates whether or not a count start, the third flag F ₃ (hereinafter, simply referred to as F _3), at the time of previous sampling time indicates whether the cool air bypass door 20 is operated, the fourth flag F ₄ (hereinafter , Simply F ₄ )
Indicates whether or not the cold air bypass door 20 has been manually operated after a predetermined time has elapsed according to the timer count. Each flag is 0 or 1 respectively.
Is held to indicate the state at that flag. Further, a signal of 1 or 0 is output to F ₁ each time the B / P door switch 41 is pressed.

At this time, if 0 is held in the above F ₁ , it indicates that the cold air bypass door 20 is in the closed state.
Holding ₁ in 1 indicates that the cold air bypass door 20 is open. If 0 is held in F ₂ , the timer count has not started, and if 1 is held in F ₂ , the timer count has started. Further, if 0 is held in F ₃ above, it indicates that the cold air bypass door 20 has not been operated during the previous sampling time, and if 1 is held in F _{3 the} cold air bypass door 20 is open during the previous sampling time. Indicates that the operation has been performed. Similarly, if 0 is held in F ₄ above, it indicates that the cold air bypass door 20 has not been manually operated after a predetermined time has elapsed, and if 1 is held in F ₄ , the timer count indicates Cold air bypass door 2 after a predetermined time
0 indicates that it was manually operated.

First, it is determined whether or not the B / P door switch 41, which is an opening / closing switch of the cold air bypass door 20, has been pressed (S11). Here, if the B / P door switch 41 is pressed, the manual control is performed by the second control device. Next, it is determined whether or not 0 is held in F ₃ in order to determine whether or not the cold air bypass door 20 has been operated at the previous sampling time (S12). Is this case, if the F ₃ 0 is held by substituting 1 to F ₃ (S14), 0 to F ₁ in order to cool air bypass door 20 it is determined whether in the open state is maintained It is determined whether or not (S1
6). Here, 1 is substituted into F ₁ in order to open the cool air bypass door 20 if the F ₁ 0 is held (S1
7), also substitutes 0 to F ₁ in order to block the cool air bypass door 20 if the F ₁ 1 is held (S1
8).

Next, as described above, the cold air bypass door 20
Is manually controlled to open (S20) or close (S2)
If it is in the 1) state, the timer count is started, 1 is assigned to F ₂ (S22), and it is determined whether or not the timer count has reached the set time (S23). It should be noted that the set time is required by the occupant immediately after the occupant pushes the B / P door switch 41 from the automatic control state of the cold air bypass door 20 to switch to the manual control and then switches from the automatic control of the cold air bypass door 20 to the manual control. Is a time that is considered sufficiently satisfied, and is, for example, about 30 minutes. Here, if the timer count has not reached the set time, the process proceeds to S11 to determine whether or not the B / P door switch 41 has been pressed. At this time, B / P door switch 4
If 1 is pressed, it is determined whether or not 0 is held in F ₃ (S12), but since the cold air bypass door 20 was operated at the previous sampling time, 1 was already held in F _3. There is. Therefore, next, it is determined whether or not 1 is held in F ₂ (S15). However, already S2
Since the timer count is started at ₂ , 1 is held in F ₂ . Next, it is determined whether 0 is held in F ₄ (S19). In this case, since F ₄ is still set to the initial setting, 0 is held, and it is judged again whether or not the timer count has reached the set time in S23. Here, if the set time has not been reached, the process returns to S11 and the determination up to S23 is made. However, if the set time is reached here, the process proceeds to S24.

Then, in order to determine whether the cold air bypass door 20 is open or not, it is determined whether 1 is held in F ₁ (S24). If 1 is held in F ₁ here, the outside temperature is detected by the outside temperature sensor 53 (FIG. 4).
It is detected whether the temperature is higher than 10 ° C. (S25). Here, if the outside air temperature is detected to be higher than −10 ° C., the solar radiation amount sensor 54 (FIG. 4) detects whether the solar radiation amount is larger than 200 kcal (S26), and the solar radiation amount is 200 kcal.
If it is detected as larger than the above, then the set temperature-inside air temperature is 1
It is determined whether the temperature is lower than 5 ° C. (S27). If it is determined that the set temperature minus the internal temperature is lower than 15 ° C., 1 is assigned to F ₄ (S28), and the process proceeds to S11 again. This indicates that the air conditioning state in the vehicle compartment, that is, the environmental state is good.

On the other hand, if it is detected in S25 that the outside air temperature is lower than -10 ° C, and if it is detected in S26 that the amount of solar radiation is less than 200 kcal, or it is determined in S27 that the set temperature-inside air temperature is higher than 15 ° C. In either case, the cold air bypass door 20 is automatically controlled (S29). Even when the cool air bypass door 20 is automatically controlled, for cool air bypass door 20 is opened, the F ₁ 1 is, in the case of the closed state, the F ₁ 0 is substituted. Then, 0 is substituted for F ₂ and F ₄ (S30).

If it is determined in S24 that 1 is not held in F ₁ , that is, if the cold air bypass door is closed, the outside air temperature sensor 53 (FIG. 4) detects that the outside air temperature is lower than 10 ° C. Whether it is low or not is detected (S31). Here, if the outside air temperature is detected to be lower than 10 ° C., the solar radiation sensor 54 (FIG. 4) detects whether the solar radiation is larger than 300 kcal (S32), and if the solar radiation is detected to be larger than 300 kcal, then the temperature difference between the temperature T _b around the temperature T _a and the feet in the vicinity of the occupant's head in the cabin, ie T _a -T
_It is determined whether _b is greater than 4 ° C. (S33). If it is determined that T _a −T _b is larger than 4 ° C., S2
9, the cold air bypass door 20 is automatically controlled.
When all of the above conditions are satisfied in this way, it becomes easy to cause a feeling of haze, so the cold air bypass door 20 is returned to the automatic control again.

On the other hand, if it is detected in S31 that the outside air temperature is higher than 10 ° C., and further that it is detected in S32 that the amount of solar radiation is smaller than 300 kcal, or in S33, T _a -T _b is 4
If either of the cases is judged to be higher than ℃, it indicates that the air-conditioning state in the vehicle compartment, that is, the environmental state is good, so the process proceeds to S28, 1 is substituted into F _4, and S11 is again performed. Move to.

Further, in the initial stage of the cool air bypass door control, that is, in the first S11 in immediately after ON the ignition key, unless pressed B / P door switch 41, the F ₃ 0 is substituted (S13) . And F
It is determined whether ₂ is 1 or not (S15), but 0 is substituted for all flags by the initial setting.
F ₂ holds 0, and the cold air bypass door 20 is automatically controlled (S28). Then, 0 is substituted for F ₂ and F ₄ , and the process returns to the main routine.

Here, when 1 is substituted into F ₄ in S27 and the process proceeds to S11, the B / P door switch 4 is operated in S11.
It is determined whether 1 has been pressed. Then, if pressed, B / P door switch 41, whether the F ₃ 0 is held is determined (S12). However, once in S14, F
_Since 1 is assigned to ₃ , the process proceeds to S15. Here, it is determined whether or not 1 is held in F _2, but since 1 has already been assigned to F ₂ in S22, the process proceeds to S19. And, although whether F ₄ 0 is held is determined, since the F ₄ 1 is substituted, the detection of S24 following environmental conditions takes place already at S27. here,
If any of S24, S25 and S26 is determined to be NO, the process proceeds to S28 and the cold air bypass door 20 is automatically controlled. Even if the B / P door switch 41 is not pressed in S11, the same steps from S15 to S24 are performed through S13.

By the way, in the conventional vehicle air conditioner, when the cold air bypass door is forcibly opened and closed by operating the B / P door switch 41 during the automatic control, the cold air bypass door 20 is manually controlled. Since it is opened and closed by, for example, once opened, it is necessary to close it by operating the B / P door switch 41 again. Moreover, once the cold air bypass door is manually controlled, it is necessary to stop all the control of the air conditioning unit once, reset the initial settings, and then return to the automatic control in order to make the automatic control again. It was very annoying.

However, in the vehicle air conditioner having the above-described structure, the predetermined time has elapsed even when the B / P door switch 41 is forcibly opened / closed by operating the B / P door switch 41 during the automatic control. After that, since the manual control such as the operation of the B / P door switch 41 can be automatically returned to the automatic control, the control of all the air conditioning units was once stopped and the initial setting was performed again to make the automatic control again. After that, it is possible to eliminate the troublesome operation of returning to the automatic control, and it is possible to perform the air conditioning operation while respecting the occupant's intention to switch from the automatic control to the manual control desired by the occupant.

Even if the cold air bypass door is opened and closed by manual control and no operation is performed by the occupant, after a lapse of a predetermined time, a state quantity that automatically affects the air-conditioning state such as the temperature in the passenger compartment is set. When a certain environmental condition is detected and the detected state quantity deviates from a predetermined condition, that is, when the environmental condition is judged to be bad, the automatic control can be resumed, so that a significant environmental deterioration in the vehicle interior can be suppressed. You can

In the present embodiment, when the cold air bypass door 20 is opened and closed and the manual control is switched during the automatic control, the automatic control is performed when it is determined that the environmental condition is bad after a lapse of a predetermined time. However, it is not limited to opening and closing the cold air bypass door 20. For example, also in the air volume adjustment operation by the blower motor and the operation by the blowout mode switching, when the manual control is switched during the automatic control, the environmental condition may be judged and the control may be returned to the automatic control.

[0051]

As described above, the vehicle air conditioner according to the first aspect of the present invention is provided with an air conditioning means for adjusting at least the temperature state of the air in the vehicle compartment by circulating the inside air and introducing the outside air. A detection means for detecting a state quantity such as an outside air temperature that has an influence, a setting means for manually setting a desired air conditioning operation in the air conditioning means, and a state for the outside air temperature etc. detected by the detection means for the air conditioning means. In a vehicle air conditioner comprising: a control means having a first control means for controlling based on an amount and a second control means for controlling based on a setting of an air conditioning operation set by the setting means,
When the desired air conditioning operation is switched from the state in which the air conditioning unit is controlled by the first control unit to the control by the second control unit by the setting unit, after a predetermined time has elapsed, the control unit reconfigures The configuration is characterized in that control is automatically switched to control by one control means.

Therefore, when the air conditioning operation is switched from the automatic control in the first control means to the manual control in the second control means, it is possible to eliminate the troublesome operation when switching from the manual control to the automatic control again, and The air conditioning operation can be performed with respect to the occupant's intention of switching from the control to the manual control desired by the occupant.

Further, after the air conditioning operation is switched from the automatic control to the manual control and after a lapse of a predetermined time, it is switched to the automatic control again, so that it is possible to suppress the deterioration of the air conditioning state in the vehicle interior. .

In the vehicle air conditioner according to the second aspect, the control means switches the desired air conditioning operation to the control by the second control means by the setting means when the air conditioning means is controlled by the first control means. In this case, when the air-conditioning state in the vehicle compartment deviates from the predetermined condition after a predetermined time has elapsed, the control is switched to the control by the first control means again.

Therefore, in addition to the effects of the first aspect, when the air conditioning operation in the vehicle interior deviates from the predetermined condition after a predetermined time elapses after the air conditioning operation is switched from the automatic control to the manual control, the automatic operation is automatically performed again. Since the control is switched to the control, it is possible to prevent the deterioration of the air-conditioning state in the vehicle interior.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a vehicle air conditioner that is an embodiment of the present invention.

FIG. 2 is a flowchart showing main control in the vehicle air conditioner of FIG.

FIG. 3 is a flowchart showing cold air bypass door control in the flowchart shown in FIG.

FIG. 4 is a block diagram of the vehicle air conditioner shown in FIG. 1.

5 is a front view of an operation panel of the vehicle air conditioner shown in FIG.

FIG. 6 is an overall configuration diagram of a conventional vehicle air conditioner.

[Explanation of symbols]

 1 Air Conditioning Unit (Air Conditioning Means) 21 Control Device (Control Means) 30 Operation Panel (Setting Means)

Claims (2)

[Claims] 1. An air conditioning means for adjusting at least a temperature state of air in a vehicle compartment by circulating inside air, introducing an outside air, etc., and a detection means for detecting a state quantity such as an outside air temperature that affects the air conditioning state in the vehicle compartment. Setting means for manually setting a desired air-conditioning operation in the air-conditioning means, and first setting means for controlling the air-conditioning means on the basis of state quantities such as the outside air temperature detected by the detecting means and the setting means. A control means having a second control means for controlling the air-conditioning operation based on the setting of the air-conditioning operation, wherein the control means is a state in which the air-conditioning means is controlled by the first control means. When the desired air conditioning operation is switched to the control by the second control means by the setting means, the control by the first control means is automatically switched again after a predetermined time has elapsed. A vehicle air conditioner characterized by replacement. 2. The control means, when the air conditioning means is controlled by the first control means, the predetermined time elapses when the desired air conditioning operation is switched to the control by the second control means by the setting means. After that, if the air-conditioning state in the vehicle compartment deviates from a predetermined condition, the control by the first control means is switched again.