KR20080010668A - A method for controlling of air conditioner in vehicle - Google Patents

Abstract

A method of controlling a vehicle air conditioner is provided to minimize a time to give off an offensive odor in the state in which a cooling mode is inactive. A method of controlling a vehicle air conditioner comprises the step of determining whether or not an air conditioner switch is turned off in an ON state, the step of determining whether or not a face vent mode is maintained when it is determined that the conditioner switch is turned off, the step of converting the face vent mode to a bi-level mode when it is determined that the face vent mode is maintained, the step of determining whether an outside-air mode or an inside-air mode is maintained after the step of converting the face vent mode to the bi-level mode, and converting the inside-air mode to the outside-air mode only in the case of the inside-air mode, and returning to an original mode when a gradient of outlet-side air temperature change detected by a temperature sensor is zero, after the step of converting the inside-air mode to the outside-air mode.

Description

A method for controlling of air conditioner in vehicle

1 is a cross-sectional view showing a configuration in which the evaporator and the heater core unit are installed in one case in a semi-center mounting type of a general vehicle air conditioner.

FIG. 2 is a schematic exploded perspective view of the blower unit, the evaporator and the heater core unit in the semi center mounting type of FIG.

Figure 3 is a flow chart showing a control method of a vehicle air conditioner according to the present invention.

Figure 4 is a cross-sectional view showing the internal operating state of the air conditioning apparatus of the semi-center mounting type according to the control method of the present invention, a cross-sectional view showing the installation position of the temperature sensor and the position of the temp door.

Figure 5 is a perspective view showing the internal operating state of the air conditioning apparatus of the semi-center mounting type according to the control method of the present invention, (a) is a bet mode, (b) is a view of the outside air mode.

6 is a control block diagram in accordance with the present invention.

7A, 7B, 7C, 7D, 7E, 7F, 7G, and 7H are graphs showing test results according to embodiments of the present invention as curves.

Figure 8 is a bar graph showing the test results according to the embodiment of the present invention in comparison with the prior art.

<Description of the symbols for the main parts of the drawings>

50: control means

51: start switch

52: A / C switch

53: temperature sensor

54: internal and external air switch door driving means

55: temp door driving means

The present invention relates to a control method of an air conditioner for a vehicle, and more particularly, to turn off the air conditioner in a state in which the air conditioner is being operated, so that the odor generation time can be shortened as much as possible in the state where the air conditioner is stopped. It relates to a control method of an air conditioner for a vehicle to provide a comfortable environment.

In general, a vehicle air conditioner is, for example, a three-piece type air conditioner having a blower unit, an evaporator unit, and a heater core unit independently. There is a center mounting type air conditioner, and finally, the blower unit, the evaporator unit, and the heater core unit may be classified into a center mounting type air conditioner.

Referring to FIG. 1, a semi-center mounting type air conditioner in which an evaporator and a heater core of the air conditioner are installed in one case will be described with reference to FIG. 1. A frost vent 23, a face vent 24, and a flow vent 25 are formed and have a flow passage 21 therein to communicate the air inlets 22 and the respective vents 23, 24, 25. An air conditioner 20, an evaporator 26 and a heater core 27 sequentially installed on the air passage 21 of the air conditioning case 20, and air blown through the evaporator 26 may include a heater core ( A plurality of mode doors for selectively distributing and inducing each of the ducts (not shown) that selectively interlock the temporal door 28 and the air selectively passing through the heater core 27 with a specific position in the vehicle interior. It is comprised including 29.

Meanwhile, as shown in FIG. 2, the semi-center mounting type air conditioner includes a blower unit 6 that is separately coupled to the evaporator and the heater core unit 30, and the blower unit 6 is a blower. Any of the internal and external air inlets 6b and 6c by switching the internal and external air switching doors 6d with the blowing force generated by the blower wheel (not shown) rotated by the blower motor 6a 'of the unit 6. Through one of the bets or outside air to be introduced into the air inlet 22 of FIG.

In the above description, for example, a semi-center mounting type air conditioner has been described as an example, but in addition to the semi-center mounting type air conditioner, the spigot type air conditioner and the center mounting type air conditioner are as follows. I have the same problem.

That is, when the cooling mode is performed in the spring, summer, and autumn, the temperature is generally maintained at a low temperature. Therefore, condensed water is often generated on the surface of the evaporator due to the low saturated steam pressure around the evaporator. The evaporator core is often inhabited by various bacteria or fungi that can live at high humidity. Therefore, when the air conditioner is switched to the cooling mode, the odor discharged into the room is diluted with cold air, so that the occupant may not feel the odor well. In addition, as shown in FIG. 8, such that a long time the odor is discharged to the room is increased, the odor intensity is increased, and there is a problem that the dissatisfaction of the vehicle occupant is increased.

The present invention has been created to solve the above problems, by turning off the air conditioner switch in the operating state in the cooling mode to reduce the occurrence of odor in the cooling mode is stopped state as possible to a comfortable environment for the vehicle occupants An object of the present invention is to provide a control method of an air conditioner for a vehicle.

The present invention for achieving the above object, in the control method of the vehicle air conditioner for reducing the occurrence of odor when the air conditioner switch is turned on in the off state, it is determined whether the air conditioner switch is turned off in the on state; Determining an air conditioner switch on / off; A vent mode determining step of determining whether the air conditioner switch is turned off; Switching to a bi-level mode for switching to a bi-level mode when it is determined as a face vent mode in the vent mode determination step; An external mode switching step of determining whether the internal mode is the internal mode or the external mode after performing the bi-level mode switching step; After performing the external mode switching step, the step of returning to the original mode to return to the original mode when the slope of the air temperature change of the outlet side of the air conditioning case sensed by the temperature sensor is 0.

Hereinafter, a preferred embodiment of a control method of a vehicle air conditioner according to the present invention will be described.

Figure 3 is a flow chart showing a control method of a vehicle air conditioner according to the present invention, Figure 4 is a cross-sectional view showing the internal operating state of the air conditioning apparatus of the semi-center mounting type according to the control method of the present invention, the installation of the temperature sensor Figure 5 is a cross-sectional view showing the position and position of the temp door, Figure 5 is a perspective view showing the internal operating state of the air conditioning apparatus of the semi-center mounting type according to the control method of the present invention, (a) is a bet mode, (b) is 6 is a control block diagram according to the present invention, and FIGS. 7A, 7B, 7C, 7D, 7E, 7F, 7G, and 7H are graphs showing a test result according to an exemplary embodiment of the present invention. 8 is a bar graph illustrating a test result according to an embodiment of the present invention in comparison with the related art.

<First Embodiment>

As shown in the drawing, the control means 50 maintains the air conditioner switch for a predetermined time while the air conditioner switch 52 is turned on by the vehicle user while the start switch 51 is turned on (S1) and the engine is running. The air conditioner switch determination step S2 of determining whether 52 is turned off is performed.

In the above state, when the control unit 50 determines that the air conditioner switch 52 is turned off, the control unit 50 proceeds to the vent mode determination step (S2-1) of determining whether the face vent mode is in operation.

After the vent mode determination step (S2-1), if it is determined that the face vent mode, the bi-level mode switching step (S2-3) to switch to the bi-level mode without proceeding to step (S2-2) Proceed.

After performing the bi-level mode switching step (S2-3), it is determined whether the bet mode or the outside mode (S3).

As a result of the determination of step S3, as shown in FIG. 5 only in the betting mode, the outside air mode switching step of switching to the outside air mode so as to open the outside air inlet 6c by driving the internal / external air switching door 6d. Proceed to (S4).

Here, the control means 50 recognizes information on whether the current vehicle state is in the bet mode or the outside mode while the engine is running.

That is, since the drive motor is used as the internal / external air switching door driving means 54 for driving the internal / external air switching door 6d, the current applied to the driving motor when switching to the betting mode and when switching to the outside air mode is desired. Due to the different signals, the control means 50 finally recognizes the control information applied to the internal / external air switching door driving means 54, so that it is possible to know whether it is in the current bet mode or the outdoor mode.

Finally, the control means 50 does not proceed with steps S5 and S6, and when the inclination of the air temperature change of the outlet side of the air conditioning case sensed by the temperature sensor 53 is zero, in other words, When it is determined that the inflection is completed and no longer occurs (S7), the home mode return step of returning to the original mode bet mode and the vent mode is performed.

Referring to the operation of the first embodiment configured as described above are as follows.

When the air conditioner switch 52 is turned on to operate the refrigeration cycle of the vehicle to discharge cold air into the vehicle interior, condensate forms on the surface of the evaporator 26, and the condensate is evaporator 26 even when the air conditioner switch 52 is turned off. It is combined with the factors that cause bad odor, such as mold inhabiting the surface of), which further induces bad odor.

Here, the temperature sensor 53 may be installed in the face vent 24 of the vents 23, 24 and 25 corresponding to the outlet side. The reason for installing the temperature sensor 53 is odor. This is because occurrence is temperature related.

The control means 50 switches to the bi-level mode in which the air is discharged to the face and the foot in the case of the face vent mode in which air is discharged toward the occupant's face from the time when the air conditioner switch 52 is turned off. Implement the odor reduction mode to switch to the outside air mode to introduce a.

Therefore, the present invention can dilute the odor because the outdoor air introduced from the outdoor is fresher than the air circulating in the indoor mode.

In addition, by switching to the bi-level mode, the odor is not discharged toward the face in the vent mode, but is divided into the face and the foot so that the odor is discharged so that the passenger feels the odor.

That is, as shown in FIG. 7 (a), it can be seen that the temperature detected by the temperature sensor 53 gradually decreases while drawing a curve while the air conditioner switch 52 is turned on for about 3 minutes, which is a predetermined time. there was.

Here, in FIG. 7 (a), the yellow curve located at the top of the line is a change in the room temperature based on the dotted line perpendicular to the point 3 minutes (180 seconds), and the pink curve located at the bottom thereof is located at the temperature sensor 53. The change in vent side discharge temperature detected by the above is shown, and the blue curve located between the room temperature change curve and the vent side discharge temperature change curve indicates the change in the external temperature.

On the other hand, when the air conditioner switch 52 is turned off, the temperature detected by the temperature sensor 53 installed in the face vent 24 increases until 65 seconds have elapsed since the air conditioner switch 52 is turned off, The slope of the temperature change becomes zero (0) in a section of 12 seconds from 65 seconds to 77 seconds, which is the time elapsed since the switch 52 is turned off. After that, the temperature gradually rises again.

Then, since the slope of the change in the temperature rise is 0 after the elapse of 65 seconds, which is a specific time from the off time of the air conditioner switch 52, the control means judges that it is no longer a condition in which odor occurs, and thus the bet mode which is the original mode and Proceed with the return to the original mode to return to the vent mode (S8).

Therefore, according to the control method of the first embodiment, the odor intensity felt by the occupant when the air conditioner switch is turned off during the cooling mode in the bet mode can be reduced by 0.5 (see FIG. 8).

Second Embodiment

As shown in the drawing, the control means 50 maintains the air conditioner switch for a predetermined time while the air conditioner switch 52 is turned on by the vehicle user while the start switch 51 is turned on (S1) and the engine is running. The air conditioner switch determination step S2 of determining whether 52 is turned off is performed.

In the above state, when it is determined that the air conditioner switch 52 is turned off, the control means 50 proceeds to the vent mode determination step (S2-1) of determining whether the air vent switch is in the face vent mode.

After the vent mode determination step (S2-1), if it is determined that the face vent mode, the bi-level mode switch step (S2-3) to switch to the bi-level mode without proceeding to step (S2-2) Proceed).

After performing the bi-level mode switching step (S2-3), it is determined whether the bet mode or the outside mode (S3).

As a result of the determination of step S3, as shown in FIG. 5 only in the betting mode, the outside air mode switching step of switching to the outside air mode so as to open the outside air inlet 6c by driving the internal / external air switching door 6d. Proceed to (S4).

Here, the control means 50 recognizes information on whether the current vehicle state is in the bet mode or the outside mode while the engine is running.

That is, since the drive motor is used as the internal / external air switching door driving means 54 for driving the internal / external air switching door 6d, the current applied to the driving motor when switching to the betting mode and when switching to the outside air mode is desired. Due to the different signals, since the control means 50 recognizes the control information finally applied to the internal / external air switching door driving means 54, it is possible to know whether it is in the bet mode or the outside mode.

Next, after the air mode switching step S4 is performed, the air volume increasing step S5 for driving the blower motor 6a 'to increase the air volume is performed.

Finally, the control means 50 does not proceed to step S6, and if the slope of the temperature change detected by the temperature sensor 53 is zero, that is, the inflection of the temperature change is completed and no longer occurs. If it is determined that it is not (S7), the process returns to the bet mode and the vent mode, which are the original mode, and also proceeds to the original mode return step of stopping the drive of the blower motor 6a '(S8).

Referring to the operation of the second embodiment configured as described above are as follows.

When the air conditioner switch 52 is turned on to operate the refrigeration cycle of the vehicle to discharge cold air into the vehicle interior, condensate forms on the surface of the evaporator 26, and the condensate is evaporator 26 even when the air conditioner switch 52 is turned off. It is combined with the factors that cause bad odor, such as mold inhabiting the surface of), which further induces bad odor.

Here, the temperature sensor 54 may be installed in the face vent 24 of the vent 23, 24, 25 corresponding to the outlet side, the reason for installing the temperature sensor 53 is odor This is because occurrence is temperature related.

That is, as shown in Figure 7 (b), the temperature detected by the temperature sensor 53 while the air conditioner switch 52 is turned on for about 3 minutes, which is a predetermined time gradually dropped while drawing a gentle curve. Could know.

On the other hand, when the air conditioner switch 52 is turned off, the temperature detected by the temperature sensor 53 installed on the face vent 24 rises until 48 seconds have elapsed since the air conditioner switch 52 is turned off, The slope of the temperature change becomes zero (0) in a section from 48 seconds to 54 seconds, which is the time elapsed since the air conditioner switch 52 is turned off. After that, the temperature gradually rises again.

In this state, the control means 50 switches to the bi-level mode in which the air is discharged to the face and the foot in the case of the face vent mode in which air is discharged toward the occupant's face from the time when the air conditioner switch 52 is turned off. In order to switch to the outside air mode to introduce outside air, and to reduce the odor to increase the amount of air.

Therefore, the present invention can dilute the odor because the outdoor air introduced from the outdoor is fresher than the air circulating in the indoor mode.

In addition, when the air volume is increased while increasing the amount of air, the surface of the evaporator 26 can maintain a dry state in which no condensed water exists.

In addition, by switching to the bi-level mode, the odor is not discharged toward the face in the vent mode, but is divided into the face and the foot so that the odor is discharged so that the passenger feels the odor.

That is, as shown in FIG. 7 (b), it can be seen that the temperature detected by the temperature sensor 53 gradually decreases while drawing a curve while the air conditioner switch 52 is turned on for about 3 minutes, which is a predetermined time. there was.

Here, in FIG. 7 (b), the yellow curve located at the top of the line is a change in the room temperature based on the dotted line perpendicular to the point 3 minutes (180 seconds), and the pink curve at the bottom thereof is located at the temperature sensor 53. The change in vent side discharge temperature detected by the above is shown, and the blue curve located between the room temperature change curve and the vent side discharge temperature change curve indicates the change in the external temperature.

On the other hand, when the air conditioner switch 52 is turned off, the temperature detected by the temperature sensor 53 installed in the face vent 24 rises until 48 seconds have elapsed since the air conditioner switch 52 is turned off. The slope of the temperature change becomes zero (0) in a section of 6 seconds from 48 seconds to 54 seconds, which is an elapsed time since the switch 52 is turned off. After that, the temperature gradually rises again.

Thereafter, since the slope of the change in temperature rise is 0 from the time of turning off the air conditioner switch 52 after 48 seconds, which is a specific time point, the control means determines that it is no longer a condition in which odor is generated, and thus the bet mode and the original mode In addition to returning to the vent mode, the flow returns to the original mode for stopping the drive of the blower motor 6a '(S8).

Therefore, according to the control method of the second embodiment, the odor intensity felt by the occupant when the air conditioner switch is turned off during the cooling mode in the bet mode can be reduced by one (see FIG. 8).

Third Embodiment

As shown in the drawing, the control means 50 maintains the air conditioner switch for a predetermined time while the air conditioner switch 52 is turned on by the vehicle user while the start switch 51 is turned on (S1) and the engine is running. The air conditioner switch determination step S2 of determining whether 52 is turned off is performed.

In the above state, when it is determined that the air conditioner switch 52 is turned off, the control means 50 proceeds to the vent mode determination step (S2-1) of determining whether the air vent switch is in the face vent mode.

After the vent mode determination step (S2-1), if it is determined that the face vent mode, the bi-level mode switch step (S2-3) to switch to the bi-level mode without proceeding to step (S2-2) Proceed).

After performing the bi-level mode switching step (S2-3), it is determined whether the bet mode or the outside mode (S3).

As a result of the determination of step S3, as shown in FIG. 5 only in the betting mode, the outside air mode switching step of switching to the outside air mode so as to open the outside air inlet 6c by driving the internal / external air switching door 6d. Proceed to (S4).

Here, the control means 50 recognizes information on whether the current vehicle state is in the bet mode or the outside mode while the engine is running.

That is, since the drive motor is used as the internal / external air switching door driving means 54 for driving the internal / external air switching door 6d, the current applied to the driving motor when switching to the betting mode and when switching to the outside air mode is desired. Due to the different signals, since the control means 50 recognizes the control information finally applied to the internal / external air switching door driving means 54, it is possible to know whether it is in the bet mode or the outside mode.

Thereafter, the control means 50 does not perform step S5, but applies a current to the temporal driving means 55 to drive the temporal door 28 so that a part of the air passing through the evaporator 26 is heated. The temporal opening amount increasing step S6 is performed to increase the temporal opening amount via the core 27.

Here, the temporal drive means 55 preferably uses a drive motor.

Finally, when the slope of the temperature change sensed by the temperature sensor 54 is zero, the control means 50, in other words, if it is determined that the inflection of the temperature change is complete and no longer occurs (S7), In addition to returning to the bet mode and the vent mode, which are the original mode, the step of returning to the original mode to reduce the opening amount of the temporal door 28 to block the front passage of the heater core 27 is performed.

That is, as shown in FIG. 7 (c), it can be seen that the temperature detected by the temperature sensor 53 gradually decreases while drawing a curve while the air conditioner switch 52 is turned on for about 3 minutes, which is a predetermined time. there was.

Here, in FIG. 7 (c), the yellow curve located at the uppermost part of the upper part of the drawing shows the change of the room temperature based on the dotted line perpendicular to the point 3 minutes (180 seconds), and the pink curve located at the lowermost part of the lower part of the temperature sensor 53 is used. The change in vent side discharge temperature detected by the above is shown, and the blue curve located between the room temperature change curve and the vent side discharge temperature change curve indicates the change in the external temperature.

On the other hand, when the air conditioner switch 52 is turned off, the temperature detected by the temperature sensor 53 installed in the face vent 24 rises until 56 seconds have elapsed since the air conditioner switch 52 is turned off, The slope of the temperature change becomes zero (0) in an interval of 8 seconds from 56 seconds to 64 seconds, which is the time elapsed since the switch 52 is turned off. After that, the temperature gradually rises again.

As described above, the third embodiment is configured to switch from the vent mode to the bi-level mode and to the outside air mode, and to increase the open amount of the temp door. Incremental mode has been added.

According to this third embodiment, as shown in FIG. 4, a part of the air passing through the evaporator 26 by positioning the temp door 28 by driving the temp door driving means 55 is heated by the heater core 27. When the amount of temporal opening is increased so that the flow rate increases, the hot water is generated around the heater core 27 because the cooling water for cooling the engine always passes through the heater core 27 at a high temperature. This high temperature heat is transferred to the evaporator 26 side to evaporate the condensed water generated on the surface of the evaporator 26. Therefore, the surface of the evaporator 26 is dried quickly and the odor generation factor is removed.

Therefore, according to the control method of the third embodiment, the odor intensity felt by the occupant when the air conditioner switch is turned off during the cooling mode in the bet mode can be reduced by one (see FIG. 8).

Fourth Example

As shown in the drawing, the control means 50 maintains the air conditioner switch for a predetermined time while the air conditioner switch 52 is turned on by the vehicle user while the start switch 51 is turned on (S1) and the engine is running. The air conditioner switch determination step S2 of determining whether 52 is turned off is performed.

In the above state, when it is determined that the air conditioner switch 52 is turned off, the control means 50 proceeds to the vent mode determination step (S2-1) of determining whether the air vent switch is in the face vent mode.

After the vent mode determination step (S2-1), if it is determined that the face vent mode, the bi-level mode switch step (S2-3) to switch to the bi-level mode without proceeding to step (S2-2) Proceed).

After performing the bi-level mode switching step (S2-3), it is determined whether the bet mode or the outside mode (S3).

As a result of the determination of step S3, as shown in FIG. 5 only in the betting mode, the outside air mode switching step of switching to the outside air mode so as to open the outside air inlet 6c by driving the internal / external air switching door 6d. Proceed to (S4).

Here, the control means 50 recognizes information on whether the current vehicle state is in the bet mode or the outside mode while the engine is running.

That is, since the drive motor is used as the internal / external air switching door driving means 54 for driving the internal / external air switching door 6d, the current applied to the driving motor when switching to the betting mode and when switching to the outside air mode is desired. Due to the different signals, since the control means 50 recognizes the control information finally applied to the internal / external air switching door driving means 54, it is possible to know whether it is in the bet mode or the outside mode.

Next, after the air mode switching step S4 is performed, the air volume increasing step S5 for driving the blower motor 6a 'to increase the air volume is performed.

Afterwards, a temp is applied to the temporal drive unit 55 to drive the temporal door 28 to increase the temporal opening amount so that a part of the air passing through the evaporator 26 passes through the heater core 27. The door opening amount increasing step S6 is performed.

Here, the temporal drive means 55 preferably uses a drive motor.

Finally, when the slope of the temperature change sensed by the temperature sensor 53 is zero, the control means 50, in other words, if it is determined that the inflection of the temperature change is complete and no longer occurs (S7), Returning to the original mode bet mode and the vent mode, the blower motor 6a 'stops driving, and reduces the opening amount of the temporal door 28 to block the front passage of the heater core 27. Proceed to step (S8).

As described above, the fourth embodiment includes a mode for switching from the vent mode to the bi-level mode, a mode for switching to the outside air mode, an increase in the amount of temporal opening, and a mode for increasing the air volume. According to the present invention, the time for generation of odor can be significantly shortened.

That is, as shown in FIG. 7 (d), it can be seen that the temperature detected by the temperature sensor 53 gradually decreases while drawing a curve while the air conditioner switch 52 is turned on for a predetermined time of about 3 minutes. there was.

Here, in FIG. 7 (d), the yellow curve located at the top of the line based on the dotted line perpendicular to the point 3 minutes (180 seconds) indicates the change in the room temperature, and the pink curve located at the bottom thereof is located at the temperature sensor 53. The change in vent side discharge temperature detected by the above is shown, and the blue curve located between the room temperature change curve and the vent side discharge temperature change curve indicates the change in the external temperature.

On the other hand, when the air conditioner switch 52 is turned off, the temperature detected by the temperature sensor 53 installed in the face vent 24 rises until 41 seconds have elapsed since the air conditioner switch 52 is turned off, The slope of the temperature change becomes zero (0) in a section of 5 seconds from 41 seconds to 46 seconds, which is the time elapsed since the switch 52 is turned off. After that, the temperature gradually rises again.

Therefore, according to the control method of the fourth exemplary embodiment, the odor intensity felt by the occupant when the air conditioner switch is turned off during the cooling mode in the bet mode can be reduced by 1.2 (see FIG. 8).

Fifth Embodiment

As shown in the drawing, the control means 50 maintains the air conditioner switch for a predetermined time while the air conditioner switch 52 is turned on by the vehicle user while the start switch 51 is turned on (S1) and the engine is running. The air conditioner switch determination step S2 of determining whether 52 is turned off is performed.

In the above state, when it is determined that the air conditioner switch 52 is turned off, the control means 50 proceeds to the vent mode determination step (S2-1) of determining whether the air vent switch is in the face vent mode.

After the vent mode determination step (S2-1) is performed, if it is determined that the face vent mode, the temperature rise determination step (S2-2) for determining whether the temperature detected by the temperature sensor 53 rises do.

When it is determined that the temperature rises in the temperature rising determination step S2-2, the bilevel mode switching step S2-3 for switching to the bilevel mode is performed.

After performing the bi-level mode switching step (S2-3), it is determined whether the bet mode or the outside mode (S3).

As a result of the determination of step S3, as shown in FIG. 5 only in the betting mode, the outside air mode switching step of switching to the outside air mode so as to open the outside air inlet 6c by driving the internal / external air switching door 6d. Proceed to (S4).

Here, the control means 50 recognizes information on whether the current vehicle state is in the bet mode or the outside mode while the engine is running.

That is, since the drive motor is used as the internal / external air switching door driving means 54 for driving the internal / external air switching door 6d, the current applied to the driving motor when switching to the betting mode and when switching to the outside air mode is desired. Due to the different signals, the control means 50 finally recognizes the control information applied to the internal / external air switching door driving means 54, so that it is possible to know whether it is currently in the betting mode or the outside mode.

Finally, the control means 50 does not proceed with steps S5 and S6, and if the inclination of the temperature change detected by the temperature sensor 53 is zero, that is, the inflection of the temperature change is completed and no more. If it is determined that no occurrence has occurred (S7), the home mode return step of returning to the bet mode and the vent mode which is the original mode is performed.

The operation of the fifth embodiment as described above is as follows.

When the air conditioning switch 52 is turned on to operate the refrigeration cycle of the vehicle to discharge cold air into the vehicle interior, condensed water is formed on the surface of the evaporator 26, and the condensed water is evaporator 26 even when the air conditioner switch 52 is turned off. It is combined with the factors that cause bad odor, such as mold inhabiting the surface of), which further induces bad odor.

Here, the temperature sensor 53 may be installed at the face vent 24 side of the vents 23, 24 and 25 corresponding to the outlet side. The reason for installing the temperature sensor 53 is Odor generation is related to temperature.

The control means 50 receives a signal transmitted from the temperature sensor 53 indicating that the temperature is rising from the time when the air conditioner switch 52 is turned off, and the face is in the face vent mode in which air is discharged toward the face of the occupant. The odor reduction mode is performed to switch to the bi-level mode that is bisected and discharged to the side and the foot, and to switch to the outside air mode for introducing air from outside the vehicle.

In this case, the odor may be diluted because fresh air introduced from the outside is fresher than air circulating in the indoor mode.

In addition, by switching to the bi-level mode, the odor is not discharged toward the face in the vent mode, and the odor diluted by dividing into the face and the foot is discharged so that the passenger feels the odor.

That is, as shown in FIG. 7 (e), it can be seen that the temperature detected by the temperature sensor 53 gradually decreases while drawing a curve while the air conditioner switch 52 is on for about 3 minutes, which is a predetermined time. there was.

Here, in FIG. 7 (e), the blue curve located at the uppermost portion of the uppermost portion of the blue line is a change in the room temperature, and the pink curve positioned at the lowermost portion of the temperature sensor 53 is positioned on the basis of the dotted line perpendicular to the point 3 minutes (180 seconds). The change in vent side discharge temperature detected by the above is shown, and the yellow curve located between the room temperature change curve and the vent side discharge temperature change curve indicates the change in the external temperature.

On the other hand, when the air conditioner switch 52 is turned off, the temperature detected by the temperature sensor 53 installed in the face vent 24 rises until 113 seconds have elapsed since the air conditioner switch 52 is turned off, The slope of the temperature change becomes zero (0) in the section of Δ20 seconds, which becomes 133 seconds from 113 seconds, which is the time elapsed since the time of the switch 52 is turned off. After that, the temperature gradually rises again.

Thereafter, the slope of the temperature change becomes zero (0) in the interval of 113 seconds to 133 seconds, which is the time elapsed since the change in temperature detected by the temperature sensor 53 has elapsed since the time of turning off the air conditioner switch 52. In this case, the control means 50 determines that it is no longer a condition in which odor occurs and proceeds to the original state return step of returning to the bet mode and the vent mode which are the original state.

Therefore, according to the control method of the fifth embodiment, the odor intensity felt by the occupant when the air conditioner switch is turned off during the cooling mode in the bet mode can be reduced by one (see FIG. 8).

Sixth Example

As shown in the drawing, the control means 50 maintains the air conditioner switch for a predetermined time while the air conditioner switch 52 is turned on by the vehicle user while the start switch 51 is turned on (S1) and the engine is running. The air conditioner switch determination step S2 of determining whether 52 is turned off is performed.

In the above state, when it is determined that the air conditioner switch 52 is turned off, the control means 50 proceeds to the vent mode determination step (S2-1) of determining whether the air vent switch is in the face vent mode.

After the vent mode determination step (S2-1) is performed, if it is determined that the face vent mode, the temperature rise determination step (S2-2) for determining whether the temperature detected by the temperature sensor 53 rises do.

When it is determined that the temperature rises in the temperature rising determination step S2-2, the bilevel mode switching step S2-3 for switching to the bilevel mode is performed.

After performing the bi-level mode switching step (S2-3), it is determined whether the bet mode or the outside mode (S3).

As a result of the determination in step S3, as shown in FIG. 5 only in the bet mode, the outside air mode is switched to the outside air mode by driving the outdoor / external air switching door 6d to open the outside air inlet 6c. Proceed to step S4.

Here, the control means 50 recognizes information on whether the current vehicle state is in the bet mode or the outside mode while the engine is running.

That is, since the drive motor is used as the internal / external air switching door driving means 54 for driving the internal / external air switching door 6d, the current applied to the driving motor when switching to the betting mode and when switching to the outside air mode is desired. Due to the different signals, since the control means 50 recognizes the control information finally applied to the internal / external air switching door driving means 54, it is possible to know whether it is in the bet mode or the outside mode.

Next, after the air mode switching step S4 is performed, the air volume increasing step S5 for driving the blower motor 6a 'to increase the air volume is performed.

Finally, the control means 50 does not proceed to step S6, and if the slope of the temperature change detected by the temperature sensor 53 is zero, that is, the inflection of the temperature change is completed and no longer occurs. If it is determined that it is not (S7), the process returns to the bet mode and the vent mode, which are the original mode, and also proceeds to the original mode return step of stopping the drive of the blower motor 6a '(S8).

The operation of the sixth embodiment as described above is as follows.

When the air conditioning switch 52 is turned on to operate the refrigeration cycle of the vehicle to discharge cold air into the vehicle interior, condensed water is formed on the surface of the evaporator 26, and the condensed water is evaporator 26 even when the air conditioner switch 52 is turned off. It is combined with the factors that cause odor, such as mold inhabiting the surface of the), which further induces odor.

Here, the temperature sensor 53 may be installed at the face vent 24 side of the vents 23, 24 and 25 corresponding to the outlet side. The reason for installing the temperature sensor 53 is Odor generation is related to temperature.

The control unit 50 receives a signal transmitted from the temperature sensor 53 indicating that the temperature is rising from the time when the air conditioner switch 52 is turned off, and the face and the face unit in the vent mode in which air is discharged toward the face of the occupant. In addition to switching to the bi-level mode, which is bilaterally discharged to the foot, and to the external air mode for introducing air from the outside of the vehicle, an odor reduction mode for increasing the amount of air is performed.

In this case, the odor may be diluted because fresh air introduced from the outside is fresher than air circulating in the indoor mode.

In addition, by switching to the bi-level mode, the odor is not discharged toward the face in the vent mode, and the odor diluted by dividing into the face and the foot is discharged so that the passenger feels the odor.

Then, when the mode to increase the air volume, the surface of the evaporator 26 is maintained in a dry state in which no condensed water is present.

That is, as shown in FIG. 7 (f), it can be seen that the temperature detected by the temperature sensor 53 gradually decreases while drawing a curve while the air conditioner switch 52 is on for about 3 minutes, which is a predetermined time. there was.

Here, in FIG. 7 (f), the blue curve located at the top of the line based on the dotted line perpendicular to the point 3 minutes (180 seconds) indicates the change in the room temperature, and the pink curve located at the bottom thereof is located at the temperature sensor 53. The change in vent side discharge temperature detected by the above is shown, and the yellow curve located between the room temperature change curve and the vent side discharge temperature change curve indicates the change in the external temperature.

On the other hand, when the air conditioner switch 52 is turned off, the temperature detected by the temperature sensor 53 installed in the face vent 24 rises until 94 seconds have elapsed since the air conditioner switch 52 is turned off, The slope of the temperature change becomes zero (0) in a section of 16 seconds from 94 seconds to 110 seconds, which is an elapsed time since the switch 52 is turned off. After that, the temperature gradually rises again.

Thereafter, the slope of the temperature change becomes zero (0) in the interval of 94 seconds to 110 seconds, the time elapsed when the change in temperature detected by the temperature sensor 53 has elapsed since the time of turning off the air conditioner switch 52. In this case, the control means 50 determines that it is no longer a condition in which odor occurs, and returns to the bet mode and the vent mode, which are the original mode, and also proceeds to the original state return step of stopping the drive of the blower motor 6a '. (S8)

Therefore, according to the control method of the sixth embodiment of the present invention, when the air conditioner switch is turned off during the cooling mode in the bet mode, the odor intensity can be reduced by 1.3 (see FIG. 8).

Seventh Example

As shown in the drawing, the control means 50 maintains the air conditioner switch for a predetermined time while the air conditioner switch 52 is turned on by the vehicle user while the start switch 51 is turned on (S1) and the engine is running. The air conditioner switch determination step S2 of determining whether 52 is turned off is performed.

In the above state, when it is determined that the air conditioner switch 52 is turned off, the control means 50 proceeds to the vent mode determination step (S2-1) of determining whether the air vent switch is in the face vent mode.

After the vent mode determination step (S2-1) is performed, if it is determined that the face vent mode, the temperature rise determination step (S2-2) for determining whether the temperature detected by the temperature sensor 53 rises do.

When it is determined that the temperature rises in the temperature rising determination step S2-2, the bilevel mode switching step S2-3 for switching to the bilevel mode is performed.

After performing the bi-level mode switching step (S2-3), it is determined whether the bet mode or the outside mode (S3).

As a result of the determination of step S3, as shown in FIG. 5 only in the betting mode, the outside air mode switching step of switching to the outside air mode so as to open the outside air inlet 6c by driving the internal / external air switching door 6d. Proceed to (S4).

Here, the control means 50 recognizes information on whether the current vehicle state is in the bet mode or the outside mode while the engine is running.

That is, since the drive motor is used as the internal / external air switching door driving means 54 for driving the internal / external air switching door 6d, the current applied to the driving motor when switching to the betting mode and when switching to the outside air mode is desired. Due to the different signals, the control means 50 finally recognizes the control information applied to the internal / external air switching door driving means 54, so that it is possible to know whether it is in the current bet mode or the outdoor mode.

Thereafter, the control means 50 does not perform step S5, but applies a current to the temporal driving means 55 to drive the temporal door 28 so that a part of the air passing through the evaporator 26 is heated. The temporal opening amount increasing step S6 is performed to increase the temporal opening amount via the core 27.

Here, the temporal drive means 55 preferably uses a drive motor.

Finally, when the slope of the temperature change sensed by the temperature sensor 53 is zero, the control means 50, in other words, if it is determined that the inflection of the temperature change is complete and no longer occurs (S7), In addition to returning to the bet mode and the vent mode, which are the original mode, the step of returning to the original mode to reduce the opening amount of the temporal door 28 to block the front passage of the heater core 27 is performed.

In the seventh embodiment as described above, when the temperature rises in the vent mode, the mode is switched to the bi-level mode, the external air mode, and the temporal opening amount is increased. Compared to this, a mode for increasing the amount of temp door opening has been added.

According to the seventh exemplary embodiment, as shown in FIG. 4, the part of the air passing through the evaporator 26 by positioning the temporal door 28 by driving the temporal driving unit 55 is heated by the heater core 27. When the amount of temporal opening is increased so that the flow rate increases, the hot water is generated around the heater core 27 because the cooling water for cooling the engine always passes through the heater core 27 at a high temperature. This high temperature heat is transferred to the evaporator 26 side to evaporate the condensed water generated on the surface of the evaporator 26.

Therefore, the surface of the evaporator 26 becomes dry quickly, and the cause of a bad smell is eliminated.

That is, as shown in FIG. 7 (g), it can be seen that the temperature detected by the temperature sensor 53 gradually decreases while drawing a curve while the air conditioner switch 52 is turned on for about 3 minutes. there was.

Here, in FIG. 7 (g), the yellow curve located at the top of the line is a change in the room temperature based on the dotted line perpendicular to the point 3 minutes (180 seconds), and the pink curve at the bottom thereof is located at the temperature sensor 53. The change in vent side discharge temperature detected by the above is shown, and the blue curve located between the room temperature change curve and the vent side discharge temperature change curve indicates the change in the external temperature.

On the other hand, when the air conditioner switch 52 is turned off, the temperature detected by the temperature sensor 53 installed in the face vent 24 rises until 97 seconds have elapsed since the air conditioner switch 52 is turned off, The slope of the temperature change becomes zero (0) in a section of 14 seconds from 97 seconds to 111 seconds, which is the time elapsed since the switch 52 is turned off. After that, the temperature gradually rises again.

Therefore, according to the control method of the seventh embodiment, the odor intensity felt by the occupant when the air conditioner switch is turned off while the cooling mode is in the bet mode can be reduced by 1.2 times (see FIG. 8).

Eighth Embodiment

As shown in the drawing, the control means 50 maintains the air conditioner switch for a predetermined time while the air conditioner switch 52 is turned on by the vehicle user while the start switch 51 is turned on (S1) and the engine is running. The air conditioner switch determination step S2 of determining whether 52 is turned off is performed.

In the above state, when it is determined that the air conditioner switch 52 is turned off, the control means 50 proceeds to the vent mode determination step (S2-1) of determining whether the air vent switch is in the face vent mode.

After the vent mode determination step (S2-1) is performed, if it is determined that the face vent mode, the temperature rise determination step (S2-2) for determining whether the temperature detected by the temperature sensor 53 rises do.

When it is determined that the temperature rises in the temperature rising determination step S2-2, the bilevel mode switching step S2-3 for switching to the bilevel mode is performed.

After performing the bi-level mode switching step (S2-3), it is determined whether the bet mode or the outside mode (S3).

As a result of the determination of step S3, as shown in FIG. 5 only in the betting mode, the outside air mode switching step of switching to the outside air mode so as to open the outside air inlet 6c by driving the internal / external air switching door 6d. Proceed to (S4).

Here, the control means 50 recognizes information on whether the current vehicle state is in the bet mode or the outside mode while the engine is running.

That is, since the drive motor is used as the internal / external air switching door driving means 54 for driving the internal / external air switching door 6d, the current applied to the driving motor when switching to the betting mode and when switching to the outside air mode is desired. Due to the different signals, since the control means 50 recognizes the control information finally applied to the internal / external air switching door driving means 54, it is possible to know whether it is in the bet mode or the outside mode.

Next, after the air mode switching step S4 is performed, the air volume increasing step S5 for driving the blower motor 6a 'to increase the air volume is performed.

Afterwards, a temp is applied to the temporal drive unit 55 to drive the temporal door 28 to increase the temporal opening amount so that a part of the air passing through the evaporator 26 passes through the heater core 27. The door opening amount increasing step S6 is performed.

Here, the temporal drive means 55 preferably uses a drive motor.

Finally, when the slope of the temperature change sensed by the temperature sensor 53 is zero, the control means 50, in other words, if it is determined that the inflection of the temperature change is complete and no longer occurs (S7), Returning to the original mode bet mode and the vent mode, the blower motor 6a 'stops driving, and reduces the opening amount of the temporal door 28 to block the front passage of the heater core 27. Proceed to step (S8).

In the eighth embodiment as described above, when the temperature rises in the vent mode, the vent mode is switched to the bi-level mode, the external air mode is set, and the temporal opening amount is increased, and the air volume is increased. According to the eighth embodiment, it is possible to eliminate the occurrence factor of odor.

That is, as shown in FIG. 7 (h), it can be seen that the temperature detected by the temperature sensor 53 gradually decreases while drawing a curve while the air conditioner switch 52 is turned on for a predetermined time of about 3 minutes. there was.

Here, in FIG. 7 (h), the yellow curve located at the top of the line based on the dotted line perpendicular to the point 3 minutes (180 seconds) indicates the change in the room temperature, and the pink curve at the bottom thereof is located at the temperature sensor 53. The change in vent side discharge temperature detected by the above is shown, and the blue curve located between the room temperature change curve and the vent side discharge temperature change curve indicates the change in the external temperature.

On the other hand, when the air conditioner switch 52 is turned off, the temperature detected by the temperature sensor 53 installed in the face vent 24 rises until 96 seconds have elapsed since the air conditioner switch 52 is turned off, The slope of the temperature change becomes zero (0) in a section of 12 seconds from 96 seconds to 108 seconds, which is the elapsed time since the switch 52 is turned off. After that, the temperature gradually rises again.

Therefore, according to the control method of the eighth embodiment, the odor intensity felt by the occupant when the air conditioner switch is turned off while the air conditioner is in the bet mode can be reduced by 1.3 (see FIG. 8).

As described above, according to the present invention, it is possible to provide a pleasant environment to the vehicle occupant by turning off the air conditioner switch in the state of operating in the cooling mode to shorten the odor occurrence time as much as possible in the state in which the cooling mode is stopped. do.

In addition, the present invention can reduce the discomfort caused by the smell by dispersing the discharge outlet of the odor generated to the foot of the occupant.

Claims (4)

In the control method of the vehicle air conditioner for reducing the occurrence of odor when the air conditioner switch is turned on in the off state, Determining an air conditioner switch on / off to determine whether the air conditioner switch is turned off in an on state; A vent mode determining step of determining whether the air conditioner switch is turned off; Switching to a bi-level mode for switching to a bi-level mode when it is determined as a face vent mode in the vent mode determination step; An external mode switching step of determining whether the internal mode is the internal mode or the external mode after performing the bi-level mode switching step; After performing the external air mode switching step, the vehicle air, including the original mode return step of returning to the original state mode when the inclination of the air temperature change of the outlet side of the air conditioning case detected by the temperature sensor is 0 Control method of harmonic device. The method of claim 1, And a temperature rise determining step of determining whether the temperature sensed by the temperature sensor rises after the face vent mode determination step is performed. The method of claim 1, And a wind volume increasing step of driving a blower motor to increase the air volume after the outside air mode switching step and before the return to the original mode mode step. The method according to any one of claims 1 to 3, After the external air mode switching step, the temp door opening amount increasing step of increasing the temporal opening amount so that a part of the air passing through the evaporator passes through the heater core before driving the temporal return step. Control method of a vehicle air conditioner, characterized in that it further comprises.

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