JP3460467B2 - Ventilation mode control device for vehicle air conditioning system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blowout mode control device for a vehicle air conditioning system, and more particularly to a blowout mode control device for automatically switching a blowout mode in accordance with a target blowout temperature.

[0002]

2. Description of the Related Art In a conventional general blowout mode control device,
The blowout mode is automatically switched to a ventilation mode (vent mode), a bi-level mode, a heat mode, a differential / heat mode or the like according to the target blowout temperature of the air conditioner wind. In this case, an appropriate blowout mode is selected under a plurality of preset thresholds depending on whether the target blowout temperature is higher or lower than the threshold. For example, in FIG. 8, the target outlet temperature T
The bi-level mode is selected when m is lower than the threshold temperature T _{1, and the} heat mode is selected when the target outlet temperature Tm is higher than the threshold temperature T ₂ . On the other hand, when the target blowout temperature Tm is between the threshold temperatures T ₁ and T ₂ , the blowout mode selected until then is maintained, which is called hysteresis.

In Japanese Examined Patent Publication No. 8-2733, appropriate mode switching is performed in consideration of solar radiation by moving the threshold temperature in accordance with the amount of solar radiation to a higher target outlet temperature while maintaining hysteresis. Thus, a technique for improving the comfort in the vehicle compartment is disclosed.

[0004]

However, in the conventional example described in the above publication, it is predicted that the occupant may want to switch the blowing mode based on the environmental condition of solar radiation, and the blowing mode is set in that direction. Does not consider whether or not the passenger actually wants to switch the blowing mode due to the effect of solar radiation. That is, it was not possible to automatically switch the blowing mode reflecting the intention of the occupant. Whether or not a person feels comfortable with a particular environment depends entirely on the individual's sensation, and even if the blowing mode switching condition is uniquely set according to the environment, it does not affect the occupants. There was an inconvenience that it did not always improve comfort.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a blow-out mode control device capable of improving the inconvenience of the conventional example, and in particular, capable of appropriately changing over the blow-out mode in consideration of the intention of an occupant. To do.

[0006]

In order to achieve the above object, the invention according to claim 1 provides a first threshold temperature (T ₁ )
And the second threshold temperature (T ₂ ) is preset and T ₁ <T ₂
When the relationship of is satisfied, the target outlet temperature (Tm) is Tm
If <T ₁ , select the first blowing mode, and T ₂ <T
In the case of m, the second blowing mode is selected, and T ₁ <Tm <
And a control unit to maintain the blowing mode is currently selected in the case of T _2. Then, the control unit takes a configuration in which the second threshold temperature (T ₂ ) is brought close to the first threshold temperature (T ₁ ) on condition that the desired temperature in the vehicle compartment is increased by the set temperature switch. There is.

In the present invention, for example, when an occupant wants to warm the temperature in the passenger compartment and operates the set temperature switch to raise the desired temperature, the higher one of the threshold temperatures that determines the hysteresis range on the basis of this is set. The threshold temperature T ₂ is brought closer to the lower threshold temperature T ₁ , and the blowing mode is easily switched to the mode corresponding to the higher target blowing temperature.

According to the second aspect of the invention, the control section is provided with an outside air temperature sensor for detecting the temperature outside the vehicle, and the control section is
When the desired temperature in the passenger compartment is increased by the set temperature switch, the second threshold temperature (T ₂ ) is set to the first threshold temperature (T ₁ ) provided that the detected value of the outside air temperature sensor is below a certain value.
It has a structure of approaching to.

According to the present invention, the desired temperature is raised by operating the set temperature switch and the detected value of the outside air temperature sensor at that time is not more than a certain value. It becomes easy to switch to the mode of the side that did.

According to the third aspect of the invention, the control unit is provided with a solar radiation sensor for detecting the amount of solar radiation into the vehicle interior, and the control unit, when the desired temperature in the vehicle interior is increased by the set temperature switch, The configuration is such that the second threshold temperature (T ₂ ) is brought close to the first threshold temperature (T ₁ ) on condition that the detection value of the solar radiation sensor is below a certain value.

In the present invention, the desired temperature is raised at least by operating the set temperature switch, and the detected value of the solar radiation sensor at this time is below a certain value, and the blowing mode corresponds to a high target blowing temperature. It becomes easy to switch to the side mode.

In a fourth aspect of the invention, the first threshold temperature (T ₁ ) and the second threshold temperature (T ₂ ) are preset and T
_When the relationship of ₁ <T ₂ is established, the target outlet temperature (T
When m) is Tm <T ₁ , the first blowing mode is selected, and when T ₂ <Tm, the second blowing mode is selected.
In the case of T ₁ <Tm <T ₂ , a control unit for maintaining the currently selected blowout mode is provided. Then, the control unit takes a configuration in which the first threshold temperature (T ₁ ) is brought close to the second threshold temperature (T ₂ ) on condition that the desired temperature in the vehicle compartment is reduced by the set temperature switch. There is.

In the present invention, for example, when the passenger wants to cool the temperature in the passenger compartment and operates the set temperature switch to lower the desired temperature, the lower one of the threshold temperatures which determines the hysteresis range on the basis of this The threshold temperature T ₁ is brought closer to the higher threshold temperature T ₂ , and the blowing mode is easily switched to the mode corresponding to the lower target blowing temperature.

According to the fifth aspect of the present invention, an outside air temperature sensor for detecting the temperature outside the vehicle is attached to the control section, and the control section is
When the desired temperature in the passenger compartment is decreased by the set temperature switch, the first threshold temperature (T ₁ ) is changed to the second threshold temperature (T ₂ ) on condition that the detected value of the outside air temperature sensor is equal to or higher than a certain value.
It has a structure of approaching to.

According to the present invention, the desired temperature is lowered at least by the operation of the set temperature switch, and the target value of the blowout mode is low, provided that the detected value of the outside air temperature sensor at this time is not less than a certain value. It becomes easy to switch to the mode of the side that did.

According to another aspect of the present invention, the control unit is provided with a solar radiation sensor for detecting the amount of solar radiation into the vehicle interior, and the control unit, when the desired temperature in the vehicle interior is decreased by the set temperature switch, The first threshold temperature (T ₁ ) is brought close to the second threshold temperature (T ₂ ) on condition that the detection value of the solar radiation sensor is equal to or higher than a certain value.

In the present invention, at least the desired temperature is lowered by operating the set temperature switch, and the detected value of the solar radiation sensor at this time is equal to or higher than a certain value, and the blowing mode corresponds to the low target blowing temperature. It becomes easy to switch to the side mode.

According to a seventh aspect of the present invention, the control section includes:
The first threshold temperature (T ₁ ) and the second threshold temperature (T ₂ ) are set equal on the condition that the desired temperature in the vehicle compartment is changed by the set temperature switch.

In the present invention, for example, when an occupant wants to cool the temperature in the passenger compartment and operates the set temperature switch to lower the desired temperature, the lower one of the threshold temperatures that determines the range of hysteresis on the condition of this is selected. The threshold temperature T ₁ is set equal to the higher threshold temperature T _2, and the blowout mode is particularly easy to switch to the mode on the side corresponding to the low target blowout temperature. On the contrary, the passenger wants to warm the temperature inside the vehicle,
When the set temperature switch is operated to raise the desired temperature, the higher threshold temperature T ₂ of the threshold temperatures that determine the hysteresis range is set equal to the lower threshold temperature T ₁ under this condition, and the blowing mode is high. In particular, it becomes easy to switch to the mode on the side corresponding to the target outlet temperature.

These are intended to achieve the above-mentioned object.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG.
It will be described with reference to FIG.

In the blowout mode control device shown in FIG. 1, threshold temperatures T ₁ , T ₂ , T ₃ , T ₄ are preset and T ₁ <T ₂ <
When the relationship of T ₃ <T ₄ is established, the target outlet temperature Tm
If Tm <T ₁ , select the vent mode and T ₂ ≤
If Tm <T ₃ , select bi-level mode and select T ₄
If ≤Tm, select the heat mode, and T ₁ ≤Tm <
In the case of T ₂ or T ₃ ≦ Tm <T ₄ , the blowout mode control unit 4 for maintaining the blowout mode currently selected is provided (FIG. 4).

Further, the blow-out mode control section 4, when the desired temperature in the passenger compartment is increased by the set temperature switch 1,
When the threshold temperature T _{2 is set} to the threshold temperature T ₁ and the threshold temperature T _{4 is set} to the threshold temperature T _3, and the desired temperature in the vehicle interior is decreased by the set temperature switch 1, the threshold temperature T ₁ is set to the threshold temperature T _{1. 2} has a function of setting the threshold temperature T ₃ equal to the threshold temperature T ₄ .

In FIG. 1, the blowing mode control unit 4 includes
Set temperature switch 1 for setting the desired temperature inside the vehicle
A sensor group 2 such as an inside air temperature sensor, a target outlet temperature calculating means 3 for calculating a target outlet temperature Tm of the air conditioner air based on an output of the sensor group 2 and a temperature set by the temperature setting switch 1, and an outlet mode control. An outlet damper actuator 5 that changes the opening degree of the outlet damper according to a control signal output from the unit 4 is also provided.

More specifically, in this embodiment, the sensor group 2 includes a plurality of sensors such as an inside air temperature sensor, an outside air temperature sensor, and a solar radiation sensor that detect parameters necessary for calculating the target outlet temperature Tm. Is equipped with. The target outlet temperature calculating means 3 calculates the target outlet temperature Tm of the air conditioner wind based on the detection values of the various sensors output from the sensor group 2 according to a conventional general calculation formula. The blowout mode control unit 4 is composed of a microcomputer and realizes the above-mentioned various functions by executing a microprogram. The outlet damper actuator 5 switches and drives the outlet of the air conditioner air according to the control signal output from the outlet mode control unit 4.

Next, the blowout mode selection processing by the blowout mode controller 4 will be described with reference to FIGS.

When the entire apparatus is set to the operating state, the target outlet temperature calculating means 3 calculates the target outlet temperature Tm based on the output of the sensor group 2. The blowing mode control unit 4
First, the initial values are set, and the threshold temperatures T ₁ , T ₂ , T ₃ ,
While setting T ₄ to a predetermined value, the time counter t is t =
It is set to 0 (step S1). As a result, the change map of the blowing mode with respect to the target blowing temperature Tm is shown in FIG.
As shown in (a), the state is set in consideration of hysteresis. Next, the blowout mode control unit 4 reads the target blowout temperature Tm and receives the input of the set temperature switch 1 (step S2).

If the set temperature has not been changed (step S3), the target outlet temperature Tm is set to the threshold temperature T ₁ ,
Compare with T ₂ , T ₃ , T ₄ (steps S8, S9, S1
0), if Tm <T ₁ , vent mode, T ₂ ≦ Tm <
If T ₃ is selected, the bilevel mode is selected, and if T ₄ ≦ Tm, the heat mode is selected (steps S11 and S1).
2, S13), a control signal is output to the outlet damper actuator 5. The outlet damper actuator 5 that has received the control signal sets the opening degree of the outlet damper according to the selected outlet mode. Further, in the flowchart following FIG. 3, when T ₁ ≦ Tm <T ₂ , if the currently selected mode is the vent mode or the bi-level mode, the mode is maintained as it is and the heat mode is selected. For example, the mode is changed to the bilevel mode (steps S16, S18, S19). On the other hand, when Tm takes a value other than the above, if the heat mode or the bi-level mode is selected, the mode is maintained as it is, and if the vent mode is selected, the mode is changed to the bi-level mode ( Steps S17, S20). Then, after performing each of these processes, the process proceeds to step S14 and subsequent steps in FIG.

Subsequently, the blow-out mode control unit 4 increments the time counter t (step S14) and judges whether or not a constant count α has passed (step S15). As a result, if the fixed count has elapsed, the above-described processing is repeated from the initial value setting processing in step S1, and if not, the above-described processing is repeated from the target blowout temperature Tm reading processing in step S2.

On the other hand, when the occupant operates the preset temperature switch 1 to change the desired temperature in the passenger compartment during the above processing (step S3), the control section 4 executes the same initial value setting processing as in step S1. After that (step S4), it is determined whether the change amount of the set temperature switch 1 is "+1" or "-1" (step S5).

[0031] Then, by substituting the T ₁ to the threshold temperature T ₂ if it is "+1", is substituted for T ₃ to T ₄ (step S
6). As a result, the blowout mode change map for the target blowout temperature Tm is changed as shown in FIG. Therefore, compared to the initial state, it becomes easier to switch to the blowout mode corresponding to the side on which the target blowout temperature Tm is higher. Here, the reason why the occupant operates the set temperature switch 1 to the "+1" side is that the passenger wants to further warm the interior of the vehicle, and the occupant's intention is reflected on the side where the target outlet temperature Tm is high. It is possible to easily switch to the blowout mode corresponding to.

[0032] Conversely, by substituting the T ₂ amount changes the threshold temperatures T ₁ if "-1" is substituted of T ₄ to T ₃ (step S7). As a result, the change map of the blowing mode with respect to the target blowing temperature Tm is changed as shown in FIG. 4 (c). Therefore, compared to the initial state, it becomes easier to switch to the blowout mode corresponding to the side on which the target blowout temperature Tm is lower. Here, the reason why the occupant operated the set temperature switch 1 to the "-1" side is that the occupant wants to further cool the passenger compartment, and the target blowing temperature Tm is reflected by the intention of the occupant. It is possible to easily switch to the blowout mode corresponding to the low side.

Further, in steps S6 and S7 described above, the change map of the blowing mode is shown in FIG. 4 (b) or FIG.
After changing to (c), the processes from step S8 described above are executed. Then, the time counter t is incremented (step S14), and in step S15,
When the time counter t reaches a constant value α, the threshold temperature T ₁ ,
T _2, T _3, T ₄ is initialized (step S1), and changing the map of the air outlet mode is returned into account initial states of the hysteresis as shown in Figure 4 (a).

Description will be made with reference to FIG. For example, if the target blowout temperatures Tm at the set temperatures of 25 ° C, 26 ° C, 27 ° C, and 28 ° C are Ta, Tb, Tc, and Td, respectively, the set temperature is 25 ° C (target blowout temperature Tm = Ta) in the conventional control.
In the case of, the blowing mode is the bi-level mode. Here, even if the passenger wants to warm the passenger compartment and raises the set temperature by 1 ° C., the target outlet temperature Tm = Tb, and in the conventional control, the bi-level mode is maintained until the set temperature is raised to 28 ° C. is there. On the other hand, in the present embodiment, when the set temperature is set to “+1”, the blowout mode change map is switched to the condition shown in FIG. 4B, so that when the occupant sets the set temperature to 26 ° C. Switch to heat mode.

As described above, according to the present embodiment, when the set temperature is increased by the set temperature switch 1, the blowout mode control section 4 sets the threshold temperature T ₂ to the threshold temperature T ₁ and the threshold temperature T _{1. Since 4} is set equal to the threshold temperature T ₃ , respectively, it becomes easy to switch to the blowing mode in which the target blowing temperature Tm is high, and it is possible to perform the blowing mode switching control that reflects the occupant's intention to warm the passenger compartment. .

When the set temperature is decreased by the set temperature switch 1, the blowout mode control section 4 sets the threshold temperature T
_{Since 1} is set equal to the threshold temperature T ₂ and the threshold temperature T ₃ is set equal to the threshold temperature T ₄ , respectively, it becomes easy to switch to the blowing mode in which the target blowing temperature Tm is low, which reflects the passenger's intention to cool the passenger compartment. It is possible to perform the switching control of the blowout mode.

Further, in the present embodiment, in the conventional vehicle air conditioning control device, an ECU (Electronic Co) is used.
Since it can be implemented by changing the operation program of the control unit (control unit), it is possible to effectively utilize the existing hardware resources and contribute to the provision of an ECU that is more functionally superior.

Next, another embodiment of the present invention will be described with reference to FIGS.

In the blowing mode control device shown in FIG. 6, in addition to the configuration of the first embodiment described above, the outputs of the outside air temperature sensor and the solar radiation sensor included in the sensor group 2 are also input to the blowing mode control unit 4. It is like this. Further, in the present embodiment, the blowout mode control unit 4 executes a process in which step S100 (enclosed part) of the flowchart shown in FIG. 2 is replaced with step S200 of FIG. 7. The other parts are configured the same as in the above-described first embodiment. Hereinafter, the difference in the operation of the blowout mode control unit 4 will be described with reference to FIG. 7.

In this embodiment, when the set temperature is changed by the set temperature switch 1 (step S3), the blowout mode control section 4 performs the following processing according to the changed amount (step S201).

That is, when the change amount of the set temperature is "+1", the detected value of the outside air temperature sensor is read from the sensor group 2 and it is determined whether or not it is larger than the constant value α ₁ (step S20).
2). As a result, when the outside temperature is larger than α ₁ , that is,
When the outside air is originally warm, it is estimated that the change in the set temperature made by the occupant is not based on the intention of warming the passenger compartment, so the threshold temperatures T ₂ and T ₄ are not changed, and the step S8 and subsequent steps are performed. Process shifts to.

On the other hand, if the outside air temperature is α ₁ or less, the detection value of the solar radiation sensor is read from the sensor group 2 to obtain a constant value β ₁
It is determined whether it is larger than (step S203).
As a result, when the amount of solar radiation is larger than β ₁ , that is, when the solar radiation is shining strongly, it is estimated that the change in the set temperature made by the occupant is not based on the desire to warm the passenger compartment. The threshold temperatures T ₂ and T ₄ are not changed, and the process proceeds to step S8 and subsequent steps.

On the other hand, if the amount of solar radiation is β ₁ or less, it is estimated that the change in the set temperature made by the occupant is based on the intention of warming the passenger compartment. Therefore, the threshold temperatures T ₁ , T ₂ ,
After setting initial values to T ₃ and T ₄ and resetting the time counter t (step S204), the threshold temperature T ₂ is made equal to T ₁ , and T ₄ is made equal to T ₃ (step S20).
5). As a result, it becomes easier to switch to the blowout mode corresponding to the side on which the target blowout temperature Tm is high. After that, the processing from step S8 onward is executed.

When the set temperature change amount is "-1" in step S201, the detected value of the outside air temperature sensor is read from the sensor group 2 and it is determined whether or not it is smaller than the constant value α ₂ (step S206). ). As a result, the outside temperature is α
If it is smaller than ₂ , that is, if the outside air is originally cool, it is estimated that the change in the set temperature made by the occupant is not based on the intention to cool the passenger compartment, so the change in the threshold temperatures T ₁ and T ₃ is performed. Is not performed, and the process proceeds to step S8 and subsequent steps.

On the other hand, if the outside air temperature is α ₂ or more, the detected value of the solar radiation sensor is read from the sensor group 2 to obtain a constant value β ₂
It is determined whether it is smaller than (step S207).
As a result, when the amount of solar radiation is less than β ₂ , that is, when the solar radiation is hardly shining, it is estimated that the change in the set temperature made by the occupant is not based on the intention to cool the passenger compartment. The threshold temperatures T ₁ and T ₃ are not changed, and the process proceeds to step S8 and subsequent steps.

On the other hand, if the amount of solar radiation is β ₂ or more, it is estimated that the change in the set temperature made by the occupant is based on the intention to cool the passenger compartment, so that the threshold temperatures T ₁ , T ₂ ,
After setting initial values to T ₃ and T ₄ and resetting the time counter t (step S208), the threshold temperature T ₁ is made equal to T ₂ , and T ₃ is made equal to T ₄ (step S20).
9). Thereby, it becomes easy to switch to the blowout mode corresponding to the side where the target blowout temperature Tm is low. After that, the processing from step S8 onward is executed.

According to the present embodiment as described above, the same operational effect as that of the above-described first embodiment is obtained, and when it is estimated that the passenger truly wants to cool or warm the passenger compartment. As long as the threshold temperature is changed so that the blowout mode can be easily switched to the desired side, the blowout mode control that more faithfully reflects the intention of the occupant can be realized.

In each of the above embodiments, when the set temperature change amount is "+1", the threshold temperature T _{2 is set} to T ₁ and T ₄ is set equal to T ₃ , and the set temperature change amount is set to "1". In the case of “−1”, the threshold temperature T _{1 is set} to T ₂ and T ₃ is set to T ₄ (steps S6 and S7), but the threshold temperature is set at least when the set temperature change amount is “+1”. T ₂ to T ₁ ,
Closer T ₄ to T _3, the amount of change in setting temperature is a threshold temperature T ₁ of a case of "-1" to T _2, as long as it closer to T ₃ to T _4. Further, even when the threshold temperatures are set to be equal as in the present embodiment, it is substantially the same as in FIG.
It suffices that the blowout mode change map shown in (c) can be obtained, and it may not be realized as the processing according to the flowcharts shown in FIGS. 2 and 3. Figure 4
Many other design changes are conceivable in the processing procedure for obtaining the change map in (b) or FIG. 4 (c).

[0049]

Since the present invention is constructed and functions as described above, according to this, when the set temperature is increased by the set temperature switch, the control unit sets the second threshold temperature T ₂ to the _second value. Since the temperature approaches the threshold temperature T ₁ of ₁ , the target outlet temperature Tm
It becomes easier to switch to the blowing mode on the higher side, and it is possible to perform the blowing mode switching control that reflects the occupant's intention to warm the passenger compartment.

Further, when the second threshold temperature T ₂ is brought close to the first threshold temperature T _{1 under the} condition that the outside air temperature is below a certain level or the insolation is below a certain level, the occupant will truly drive the vehicle. Only when it is estimated that the passenger wants to warm the room, the threshold temperature is changed so that the blowing mode can be easily switched, so that the blowing mode control that more faithfully reflects the intention of the passenger can be realized. .

Further, in the invention according to claim 4, the control unit brings the first threshold temperature T ₁ close to the second threshold temperature T ₂ when the set temperature is decreased by the set temperature switch. It becomes easy to switch to the blowout mode on the side where the target blowout temperature Tm is low, and the blowout mode switching control that reflects the occupant's intention to cool the vehicle interior can be performed.

Furthermore, when the first threshold temperature T ₁ is brought close to the second threshold temperature T _{2 under the} condition that the outside air temperature is above a certain level or the insolation is above a certain level, the occupant will truly drive the vehicle. Only when it is estimated that the passenger wants to cool the room, the threshold temperature is changed so that the blowing mode can be easily switched, so that the blowing mode control that more faithfully reflects the intention of the passenger can be realized. .

In particular, in the invention according to claim 7, the controller controls the first threshold temperature (T ₁ ) and the second threshold temperature (T ₁ ) on condition that the desired temperature in the vehicle compartment is changed by the set temperature switch. Since T ₂ ) is set to be equal to each other, the blowing mode is particularly easy to switch, and the blowing mode switching control that strongly reflects the occupant's intention to cool or warm the passenger compartment can be performed. A blowout mode control device for an air conditioning system for a vehicle can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of a blowout mode control unit.

FIG. 3 is a flowchart showing an operation of a blowout mode control unit.

FIG. 4 is a diagram showing a blowout mode change map, in which FIG. 4A shows the normal control and FIG. 4B shows the set temperature “+1”.
4C shows the case where the set temperature is "-1".

FIG. 5 is a diagram for explaining an effect of the embodiment shown in FIG.

FIG. 6 is a block diagram showing another embodiment of the present invention.

FIG. 7 is a flowchart showing the operation of the embodiment shown in FIG.

FIG. 8 is a diagram showing a relationship between a target outlet temperature and an outlet mode in a conventional example.

[Explanation of symbols]

1 set temperature switch 2 sensor group 3 target outlet temperature calculation means 4 outlet mode control unit (control unit) 5 outlet damper actuators T ₁ , T ₂ , T ₃ , T ₄ threshold temperature Tm target outlet temperature

Claims (7)

(57) [Claims] 1. When the first threshold temperature (T ₁ ) and the second threshold temperature (T ₂ ) are preset and the relationship of T ₁ <T ₂ is established, the target outlet temperature (Tm) is Tm < When T ₁ is selected, the first blowing mode is selected, when T ₂ <Tm, the second blowing mode is selected, and when T ₁ <Tm <T ₂ , the currently selected blowing mode is selected. In the blow-out mode control device for a vehicle air conditioning system, which includes a control unit for maintaining the temperature, the control unit controls the second threshold temperature (T ₂₎ on condition that a desired temperature in the vehicle compartment is increased by a set temperature switch. )
Is close to the first threshold temperature (T ₁ ), a blowout mode controller for a vehicle air conditioning system. 2. An outside air temperature sensor for detecting a temperature outside the vehicle is provided together with the control unit, and the control unit detects the outside air temperature sensor when a desired temperature in the vehicle interior is increased by a set temperature switch. The blowing mode of the air conditioning system for a vehicle according to claim 1, wherein the second threshold temperature (T ₂ ) is brought close to the _first threshold temperature (T ₁ ) on condition that the value is equal to or less than a certain value. Control device. 3. A solar radiation sensor for detecting the amount of solar radiation into the vehicle compartment is provided side by side with the controller, and the controller controls the solar radiation sensor when the desired temperature in the vehicle interior is increased by a set temperature switch. The blowout of the air conditioning system for a vehicle according to claim 1, wherein the second threshold temperature (T ₂ ) is brought close to the _first threshold temperature (T ₁ ) on condition that the detected value is equal to or less than a certain value. Mode control device. 4. When the first threshold temperature (T ₁ ) and the second threshold temperature (T ₂ ) are set in advance and the relationship of T ₁ <T ₂ is established, the target outlet temperature (Tm) is Tm < When T ₁ is selected, the first blowing mode is selected, when T ₂ <Tm, the second blowing mode is selected, and when T ₁ <Tm <T ₂ , the currently selected blowing mode is selected. In the blow-out mode control device for a vehicle air conditioning system, which includes a control unit for maintaining the temperature of the vehicle, the control unit controls the first threshold temperature (T ₁ )
Is close to the second threshold temperature (T ₂ ), a blowout mode control device for a vehicle air conditioning system. 5. An outside air temperature sensor for detecting a temperature outside the vehicle is provided together with the control unit, and the control unit detects the outside air temperature sensor when a desired temperature in the vehicle interior is decreased by a set temperature switch. The blowout mode of a vehicle air conditioning system according to claim 4, wherein the first threshold temperature (T ₁ ) is brought close to the _second threshold temperature (T ₂ ) on condition that the value is equal to or more than a certain value. Control device. 6. A solar radiation sensor for detecting the amount of solar radiation into the vehicle compartment is provided together with the control unit, and the control unit controls the solar radiation sensor when the desired temperature in the vehicle interior is reduced by a set temperature switch. The blowout of the vehicular air conditioning system according to claim 4, wherein the first threshold temperature (T ₁ ) is brought close to the _second threshold temperature (T ₂ ) on condition that the detected value is equal to or higher than a certain value. Mode control device. 7. The control unit sets the first temperature on condition that a desired temperature in the vehicle compartment is changed by the set temperature switch.
5. The blowout mode control device for an air conditioning system for a vehicle according to claim 1, wherein the threshold temperature (T ₁ ) and the second threshold temperature (T ₂ ) are set to be equal to each other.