KR102032255B1 - Air conditioner for vehicle with photocatalyst module and method for controlling the same - Google Patents

Abstract

Vehicle air conditioning equipped with a photocatalyst module that purifies the air flowing into the air conditioning case, sterilizes and deodorizes the evaporator, and performs efficient and economical sterilization and deodorization of the evaporator in connection with before and after starting the vehicle. An apparatus and control method thereof are disclosed. An air conditioner for a vehicle having a photocatalyst module has an air inlet formed at an inlet side, an air outlet formed at an outlet side, and an air passage formed therein, an evaporator installed on the air passage of the air conditioning case; And a blower for blowing air inside the air conditioning case, wherein a photocatalyst module is provided at one side of the air conditioning case, and the photocatalyst module generates a radical by generating a photocatalytic reaction by the irradiated light to generate radicals. A catalyst unit arranged to supply the air flow path inside the air conditioning case, at least one light source unit for irradiating ultraviolet (UV) light to the catalyst unit, a start-on time and a turn-off time of the vehicle It includes a control unit for detecting and controlling the operation of the light source unit in conjunction with the start On / Off time. Therefore, it is possible to completely remove the unpleasant air remaining in the evaporator or the inside of the vehicle and to provide a comfortable environment without any additional manipulation, and to economically operate the photocatalytic module and to increase durability and to use it semipermanently.

Description

Vehicle air conditioner with photocatalyst module and control method thereof {AIR CONDITIONER FOR VEHICLE WITH PHOTOCATALYST MODULE AND METHOD FOR CONTROLLING THE SAME}

The present invention relates to a vehicle air conditioner having a photocatalyst module and a control method thereof, and more particularly, to a vehicle air conditioner having a photocatalytic module for purifying air introduced into an air conditioning case and sterilizing and deodorizing an evaporator. It relates to a control method.

The vehicle air conditioner is a device for cooling or heating an interior of a vehicle by heating or cooling the air in the vehicle or introducing the outside air into the vehicle, or circulating the air in the vehicle. The heater core for the heating operation and the air cooled or heated by the evaporator or the heater core are selectively blown to each part of the vehicle interior by using a blower mode switching door.

Japanese Patent Laid-Open No. 2549032 (1997.05.30) filed beforehand discloses a cooling device with a deodorizer for automobiles. 1 is a cross-sectional view showing a conventional automotive deodorizer cooling device.

As shown in FIG. 1, a conventional vehicle deodorizer cooling apparatus includes an outside air inlet 21 and an inside air inlet 22 in a case 20, and the outside air inlet 21 and the inside air inlet 22 are provided. An intake door 23 for selectively opening and closing is provided to be rotatable. An actuator 30 is connected to the rotational shaft of the intake door 23 and controlled by the control means 31.

A downstream side of the intake door 23 is provided with a blower 25 for blowing air introduced from the internal and external air inlets 21 and 22 to the downstream side, and the blower 25 includes a fan 32 and the fan 32. ) Is composed of a motor 33 for rotating. On the downstream side of the blower 25, an evaporator 26 is installed to cool the air by exchanging heat with the air passing therethrough. In the air passage 28 on the downstream side of the evaporator 26, a photocatalyst filter 27 for generating active oxygen by irradiation of long wavelength light is provided.

The photocatalyst filter 27 generates active oxygen by irradiation of the ultraviolet lamp 29, and oxidatively decomposes the substance causing the odor to the oxidative compound of extremely low concentration. The ultraviolet lamp 29 is disposed between the evaporator 26 and the photocatalyst filter 27. On the downstream side of the photocatalyst filter 27, a metal catalyst filter 34 for removing ozone contained in the flowing air is provided. Unexplained reference numeral 35 is a temperature sensor, 36 is a sensor for sensing odor level, 37 is a fan switch, 24 is an air outlet.

On the other hand, Japanese Patent Application Laid-Open No. 1984-230815 (December 25, 1984) discloses a vehicle air conditioner relating to control of a sterilizing lamp. Figure 2 shows a schematic configuration of a conventional vehicle air conditioner.

As shown in FIG. 2, the solar cell 2 is located in the space portion at the rear position. The air conditioner 3 is located on the seat under the front panel, and the air conditioning case 4 of the air conditioner 3 has an outside air inlet 5 and an inside air inlet 6. The air blower 10 is also located behind the door 8, 9 for opening or closing the inlet 5, 6.

The germicidal lamp 13 is located behind the air blower 10 and is fixed to the air conditioning case 4 and located adjacent to the vacuum evaporator 11. The power terminal of the germicidal lamp 13 and the air blower 10 is connected to the battery of the vehicle. In addition, when the main switch of the vehicle is turned off (Off), it is connected to the solar cell 2 via the power supply means 4. For this reason, the germicidal lamp 13 and the air blower 10 are operated.

In addition, Japanese Patent Application Laid-Open No. 2003-240260 (2003.08.27), which is previously filed, discloses an air conditioner capable of sterilizing bacteria contained in the air with a simple configuration. According to the above publication, an ultraviolet lamp for irradiating ultraviolet rays to the air blown by the blower, an operation control unit for controlling the operation of the blower, and a lamp detection means for detecting the lighting of the ultraviolet lamp. When the lamp detecting means detects the lighting of the ultraviolet lamp, the driving control unit decreases the number of revolutions of the blower than when not detecting the lighting of the ultraviolet lamp.

However, the above-described publications, however, there is a problem that the ultraviolet lamp used as a light source of the photocatalyst contains mercury therein, and mercury is harmful to the human body and cannot be applied to a vehicle due to various environmental requirements. In addition, the photocatalyst filter is installed on the downstream side of the evaporator, so that the odor generated from the evaporator is adsorbed and deodorized, and thus, the filter has to be replaced due to a decrease in the amount of airflow.

In addition, bacteria and odorous substances remaining in the evaporator at the beginning of the on operation may cause an unpleasant odor to the vehicle occupant. In this case, although the odor can be removed to some extent due to the operation of the lamp after the start operation (On), there is a problem in that the air having an unpleasant smell and bacteria is released into the cabin at the beginning of the start, causing discomfort to the occupant .

Japanese Patent Publication No. 2549032 (1997.05.30) Japanese Laid-Open Patent Publication 1984-230815 (1984.12.25) Japanese Laid-Open Patent Publication 2003-240260 (2003.08.27)

In order to solve the above problems, the present invention purifies the air flowing into the air conditioning case, sterilizes and deodorizes the evaporator, and sterilizes the evaporator efficiently and economically in conjunction with the time before and after the vehicle starts. An object of the present invention is to provide a vehicle air conditioner having a photocatalyst module capable of performing deodorization and a control method thereof.

An air conditioner for a vehicle having a photocatalyst module according to the present invention includes an air inlet formed at an inlet side, an air outlet formed at an outlet side, and an air passage formed therein, and installed on an air passage of the air conditioning case. An evaporator and a blower for blowing air into the air conditioning case, wherein a photocatalyst module is provided on one side of the air conditioning case, and the photocatalyst module generates radicals by generating a photocatalytic reaction by irradiated light. A catalyst unit arranged to supply the radicals to the air flow path inside the air conditioning case, at least one light source unit for irradiating ultraviolet (UV) light to the catalyst unit, a start-on time and a start-off of the vehicle ( Off) includes a control unit for detecting a time point and controlling the operation of the light source unit in association with the start On / Off time point.

In the above, the start of the vehicle (On) of the vehicle is controlled by a portable terminal, the control unit is interlocked with the portable terminal receives a start-on time from the portable terminal for a predetermined time before the start-on time (On) Operation control of the light source unit.

In the above, the portable terminal is composed of a smartphone (Smart Phone), the control unit is linked to the application installed in the smartphone.

In the above, the control unit is linked with the navigation installed in the vehicle, and receives the start off time from the navigation to control the operation of the light source for a predetermined time before the start off (Off) time.

In the above, the control unit operates the light source unit when receiving a destination arrival signal before arrival at the set destination of the navigation, and stops the light source unit at the time of starting the vehicle off.

In the above, the photocatalyst module is provided on an upstream side of the evaporator and is provided in a side-by-side direction facing the evaporator in the air flow direction.

On the other hand, the control method of the vehicle air conditioner with a photocatalyst module according to the present invention comprises the steps of operating an application installed in a portable terminal consisting of a smart phone (Smart Phone), the control unit starting the application operation time of the portable terminal of the vehicle Recognizing it as an On time and controlling the operation of the light source for a predetermined time before the On time, the blower operating, the vehicle starting up, and the control unit arriving at the destination of the navigation Receiving a signal for controlling the operation of the light source unit for a predetermined time, the start of the vehicle is turned off, and the operation of stopping the light source unit at the time of starting the vehicle (Off) off.

Vehicle air conditioner equipped with a photocatalyst module and a control method thereof according to the present invention can completely remove the unpleasant air remaining in the evaporator or the vehicle interior and can be conveniently provided without a separate operation, the evaporator or in the car interior By determining the appropriate time point where sterilization and deodorization is required and driving the photocatalytic module intensively at this point, economical operation of the photocatalytic module is possible and durability can be increased by semi-permanent use.

1 is a cross-sectional view showing a conventional automotive deodorizer cooling device,
Figure 2 shows a schematic configuration of a conventional vehicle air conditioner,
3 is a cross-sectional view showing a schematic configuration of a vehicle air conditioner having a photocatalyst module according to an embodiment of the present invention;
4 is a perspective view illustrating a vehicle air conditioner having a photocatalyst module according to an embodiment of the present invention;
5 schematically illustrates an installation state of a photocatalyst module according to an embodiment of the present invention.
6 is a block diagram illustrating a configuration of a vehicle air conditioner having a photocatalyst module according to an embodiment of the present invention.
FIG. 7 schematically illustrates an installation state of a photocatalyst module according to a modification of FIG. 5;
8 is a flowchart illustrating a method of controlling a vehicle air conditioner having a photocatalyst module according to an embodiment of the present invention.

Hereinafter, a technical configuration of a vehicle air conditioner having a photocatalyst module and a control method thereof according to the accompanying drawings will be described in detail.

3 is a cross-sectional view showing a schematic configuration of a vehicle air conditioner with a photocatalyst module according to an embodiment of the present invention, Figure 4 is a vehicle air conditioner with a photocatalyst module according to an embodiment of the present invention One perspective view.

3 and 4, the vehicle air conditioner 100 having a photocatalyst module according to an embodiment of the present invention includes an air conditioning case 140, an evaporator 141 and a heater core 142, It includes a blower 110, a temperature control door 145, a plurality of mode doors 146, and a photocatalyst module 200.

The air conditioning case 140 has an air inlet 143 is formed on the inlet side, a plurality of air outlet 144 is formed on the outlet side, the air passage is formed therein. The evaporator 141 and the heater core 142 are sequentially installed at regular intervals on the internal air passage of the air conditioning case 140. The evaporator 141 exchanges heat with the air flowing through the air passage to cool the air, and the heater core 142 exchanges heat with the air flowing through the air passage to heat the air.

Blower 110 is to blow air into the air conditioning case 140, the inside air inlet 121, the outside air inlet 122 is formed on one side, the inside air inlet 121 and the outside air inlet 122 Inside and outside the air conversion door 123 is installed to selectively open and close. In addition, the blower 110 is provided with a blower fan 135 for forcibly blowing the inside or outside air to the air inlet 143 side of the air conditioning case 140.

The temperature control door 145 is installed between the evaporator 141 and the heater core 142 to adjust the opening degree of the hot air passage passing through the heater core 142 and the cold air passage bypassing the heater core 142. Adjust the discharge temperature of the. A plurality of mode doors 146 are installed at each air discharge port 144 to selectively open and close each air discharge port 144 according to various air conditioning modes.

5 is a view schematically showing an installation state of a photocatalyst module according to an embodiment of the present invention, Figure 6 is a block diagram showing the configuration of a vehicle air conditioner having a photocatalyst module according to an embodiment of the present invention. .

5 and 6, the photocatalyst module 200 is provided at one side of the air conditioning case 140, and includes a catalyst unit 210, a light source unit 220, and a controller 300. The photocatalyst module 200 may be configured by modularizing the catalyst unit 210 and the light source unit 220 into one. Therefore, the photocatalyst module 200 can be easily attached and detached, which is advantageous in maintenance.

The catalyst unit 210 generates a photocatalytic reaction by the irradiated light to generate the peroxygen radical 201. The catalyst unit is arranged to supply the generated peroxygen radical 201 to the air flow path inside the air conditioning case 140. The catalyst unit 210 is made of a carrier such as ceramics, and is made of a material that does not have much air resistance, thereby minimizing a decrease in the amount of air flowed through the catalyst unit 210.

The catalyst unit 210 causes a photocatalytic reaction by the light irradiated from the light source unit 220 to be described later, and enters into the air conditioning case 140 by the oxidation of the peroxygen radical 201 generated in the photocatalytic reaction. The pollutants and odor causing substances 1411 such as microorganisms, fungi, harmful gases, various pollutants and odors in the evaporator 141 are removed.

Light source unit 220 is made of one or a plurality, it serves to irradiate ultraviolet (UV) light to the catalyst unit 210 side. When the photocatalyst carrier constituting the catalyst unit 210 absorbs light by the light source unit 220, electrons in a valence band (VB) filled with electrons absorb the light energy and the electrons are empty. Jump to Conduction Band (CB). Holes, which are vacant electron sites in valence bands, oxidize water molecules on their surfaces, bringing them back to their original state, and oxidized water molecules form · OH radicals. In addition, electrons, called excited electrons, excited in the conduction band, react with oxygen to produce a strong oxidizing peroxygen (· O ₂ −) radical 201.

As described above, the photocatalyst module 200 includes the catalyst 210 and the light source 220 to generate the peroxygen radical 201 by the photocatalytic reaction to adsorb and deodorize contaminated air containing odors. Compared with the structure, it is not necessary to replace the filter separately, the photocatalytic module 200 can be used almost semi-permanently by selecting the type of carrier or appropriate on / off control of the light source unit. That is, the photocatalyst module 200 according to an embodiment of the present invention has excellent lifespan.

The light source unit 220 includes a light emitting diode (LED) for irradiating UVA (Ultra Violet-A) light or UVC (Ultra Violet-C) light having a wavelength of 400 nm or less. Since the light source unit 220 is composed of LEDs, it is possible to solve the problem of mercury use, which has been a problem in the existing mercury lamp, and to effectively irradiate light with a small power. In this case, UVA is advantageous in terms of cost since it is relatively inexpensive and effectively activates the photocatalytic reaction of the photocatalyst carrier. In addition, UVC is relatively expensive, but at the same time acts to activate the photocatalytic reaction can perform the sterilization function itself to improve the sterilization efficiency.

As shown in FIG. 5, the air conditioning case 140 includes a flow path switching unit in which a flow direction of air is switched upstream of the evaporator 141. The flow path switching unit is a section in which air blown from the blower 110 is converted to 90 °, and the photocatalyst module 200 is installed in the flow path switching unit. Since the photocatalyst module 200 is disposed upstream of the evaporator 141, the radicals 201 generated from the photocatalytic module 200 flow to the evaporator 141 side together with the flowing air, and thus exist in the evaporator 141. The odor causing substance 1411 such as a noxious gas is removed. In addition, since the photocatalyst module 200 is provided on a portion that is connected to the blower 110, that is, on the connection duct, it is easy to access by an operator, so there is an advantage of easy replacement during maintenance.

On the other hand, Figure 7 schematically shows the installation state of the photocatalyst module according to the modification of FIG. As shown in FIG. 7, according to a modification, the photocatalyst module 200 may be provided in a side-by-side direction facing the evaporator 141 in the air flow direction. That is, the photocatalyst module 200 is disposed to face each other in a direction parallel to the width direction of the evaporator 141. Through this configuration, the peroxygen radicals generated by the photocatalytic reaction reach the evaporator 141 side while minimizing the loss to maximize the sterilization and deodorization efficiency of the evaporator 141.

5 and 6 again, the controller 300 detects a start-on time and a start-off time of the vehicle, and operates the light source unit 220 in conjunction with the start-on / off time. To control. As the photocatalyst module 200 is operated in conjunction with the start / off time of the vehicle, the uncomfortable air remaining in the evaporator or the vehicle before boarding the vehicle can be removed and a comfortable interior environment can be maintained. In addition, it is possible to economically operate the photocatalytic module 200 by increasing the durability by determining the appropriate time point for sterilization and deodorization of the evaporator or the interior of the vehicle and intensively driving the photocatalytic module 200 at this point. Make it possible.

In more detail, the starting on of the vehicle is controlled by the portable terminal 310. In addition, the controller 300 is interlocked with the mobile terminal 310 and receives a start-on time from the mobile terminal 310. That is, the control unit 300 receives the start-on signal of the vehicle and the vehicle boarding signal of the occupant to operate the light source unit 220 for a predetermined time from the start-on time of the vehicle to before the boarding of the occupant.
As described above, as the photocatalyst module 200 is interlocked with the portable terminal 310 by the controller 300, the passenger of the vehicle operates the portable terminal 310 outside the vehicle before boarding the vehicle and the portable terminal externally. When the vehicle 310 is operated, the start of the vehicle is turned on, and the photocatalytic module 200 is operated for a predetermined time before the start time.

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Therefore, the vehicle can be easily controlled from the outside of the vehicle through the mobile terminal 310, and the photocatalyst module 200 is automatically operated for a predetermined time before the vehicle is turned on. 141 or the unpleasant air remaining in the vehicle interior is completely removed, and thus a comfortable environment may be conveniently provided without additional manipulation.

In this case, the mobile terminal 310 is composed of a smart phone, and the controller 300 is linked with an application installed in the smart phone. The application installed on the smartphone may be implemented as, for example, Blue Link as application software. The controller 300 is linked with an application installed in the smartphone, it is possible to set a more convenient and various use environment.

In addition, the controller 300 is interlocked with the navigation 320 installed in the vehicle. The control unit 300 receives a start-off time from the navigation 320, and controls the light source unit 220 for a predetermined time before the start-off time. More specifically, the control unit 300 operates the light source unit 220 when receiving the destination arrival signal before the arrival to the set destination of the navigation 320, and stops operating the light source unit 220 at the time of starting the vehicle off. do.

The navigation device 320 is a device that guides a destination by operating during driving of a vehicle, and guides a road during driving when a destination is input. When the vehicle is adjacent to the set destination, the navigation 320 notifies the occupant of the destination by voice or a separate signal, and the control unit 300 may receive the destination arrival signal to predict the starting time of the vehicle.

As such, as the photocatalyst module 200 is interlocked with the navigation unit 320 by the control unit 300 and operated for a predetermined time before the vehicle is turned off, the photocatalyst module 200 is operated for a predetermined time before the passenger gets out of the vehicle. Module 200 is activated. Accordingly, the photocatalyst module 200 may be automatically operated for a predetermined time before starting the vehicle without turning off the vehicle, thereby preventing bacteria and odor components remaining after the vehicle is turned off in the evaporator or the vehicle interior.

8 is a flowchart illustrating a method of controlling a vehicle air conditioner having a photocatalyst module according to an embodiment of the present invention.

Referring to FIG. 8, a control method of a vehicle air conditioner having a photocatalyst module according to an embodiment of the present disclosure includes operating an application installed in a mobile terminal 310 configured as a smart phone (S11); In operation S12, the control unit 300 recognizes the application operation time of the portable terminal 310 as the start-on time point of the vehicle and operates and controls the light source unit 220 for a predetermined time before the start-on time point (S12). ), The step S13 of operating the blower 110, the step S14 of starting the vehicle, and the control unit 300 receiving the destination arrival signal of the navigation 320, and for a predetermined time, Operation (S17) (S18) for controlling the operation, the step (S19) that the start of the vehicle is turned off, and the step (S20) for stopping the operation of the light source unit 220 at the time of vehicle start off (Off).

In operation S11, the occupant operates the blue link, which is a kind of application software, using the mobile terminal 310 from the outside of the vehicle. The blue link is configured to control the starting of the vehicle, the operation of the air conditioner, etc. using the mobile terminal 310 before the vehicle is boarded. In operation S12, the light source unit 220 is turned on to start the photocatalytic reaction of the catalyst unit 210 to generate peroxygen radicals, which sterilize and deodorize the evaporator 141 and the vehicle interior.

In operation S13, the blower 110 is operated. In operation S14, the vehicle is turned on and the navigation 320 is operated. In step S15, the air conditioner is operated. The photocatalyst module 200 may be repeatedly operated or stopped in operation during the vehicle driving (S16). In step (S17), the control unit 300 receives the destination arrival signal of the navigation 320, and in step (S18), the light source unit 220 is operated for a predetermined time to start the photocatalytic reaction. When the vehicle is turned off in operation S19, the light source unit 220 is turned off in operation S20.

Through this configuration, the operation time of the photocatalyst module is linked with the air conditioning apparatus and the vehicle before and after the start of the vehicle, thereby automating the driving of the photocatalyst module and enabling economical and efficient use.

So far, the air conditioner for a vehicle having a photocatalyst module according to the present invention and a control method thereof have been described with reference to the exemplary embodiment shown in the drawings, but this is merely illustrative, and those skilled in the art can perform various modifications and other equivalents therefrom. It will be appreciated that examples are possible. Therefore, the true technical protection scope should be defined by the technical spirit of the appended claims.

100: vehicle air conditioner 110: blower
121: air inlet 122: outdoor air inlet
123: internal and external air conversion door 135: blowing fan
140: air conditioning case 141: evaporator
142: heater core 143: air inlet
144: air outlet 145: temperature control door
146: mode door 200: photocatalyst module
201: peroxygen radical 210: catalyst
220: light source 300: control unit
310: mobile terminal 320: navigation

Claims (9)

An air inlet 143 is formed on the inlet side, an air outlet 144 is formed on the outlet side, and an air passage is formed therein, and an evaporator installed on the air passage of the air conditioning case 140. In the vehicle air conditioner comprising a 141, and a blower 110 for blowing air into the air conditioning case 140,
A photocatalytic reaction caused by the irradiated light to generate peroxygen radicals, and a catalyst unit 210 arranged to supply the generated peroxygen radicals to an air flow path inside the air conditioning case 140; At least one light source unit 220 emitting ultraviolet (UV) light to the catalyst unit 210 side; And a controller 300 for detecting a start-on time and a start-off time of the vehicle, and controlling the operation of the light source unit 220 in association with the start-on / off time.
The control unit 300,
Receiving a start signal of the vehicle (On) and the vehicle boarding signal of the occupant to operate the light source unit 220 for a predetermined time from when the vehicle is turned on (on) to before the passenger boarding, the destination arrival signal through the navigation 320 And receiving a start signal of the vehicle and operating the light source unit 220 for a predetermined time from the time of receiving the destination arrival signal to the starting point of the vehicle off. According to claim 1,
The catalyst unit 210 and the light source unit 220 is modularized, the vehicle air conditioner with a photocatalyst module, characterized in that to form a photocatalyst module 200. According to claim 1,
The start of the vehicle (On) of the vehicle is controlled by the mobile terminal 310, the control unit 300 is linked with the mobile terminal 310 receives the start-on time from the mobile terminal 310, the start-up is turned on (On) vehicle air conditioner with a photocatalyst module, characterized in that for controlling the operation of the light source unit 220 for a predetermined time before boarding. The method of claim 3, wherein
The portable terminal 310 is composed of a smart phone (Smart Phone), the control unit 300 is a vehicle air conditioning device having a photocatalyst module, characterized in that it is linked with the application installed on the smartphone. delete delete The method of claim 2,
The photocatalyst module 200 is a vehicle air conditioner with a photocatalyst module, characterized in that provided on the upstream side of the evaporator (141). The method of claim 7, wherein
The photocatalyst module 200 is a vehicle air conditioner having a photocatalyst module, characterized in that provided in a side by side facing the evaporator 141 in the air flow direction. An air inlet 143 is formed on the inlet side, an air outlet 144 is formed on the outlet side, and an air passage is formed therein, and an evaporator installed on the air passage of the air conditioning case 140. 141, a blower 110 for blowing air into the air conditioning case 140, and a photocatalytic reaction by the irradiated light to generate peroxygen radicals, and generate the peroxygen radicals. Catalyst unit 210 disposed to supply to the air flow path inside the 140, at least one light source unit 220 for irradiating ultraviolet (UV) light to the catalyst unit 210 side and the start of the vehicle (On) A control method of a vehicle air conditioner having a photocatalyst module including a control unit 300 for detecting a time point and a start-off time and controlling the operation of the light source unit 220 in association with the start-on / off time point.
Receiving a start signal of the vehicle (On) of the vehicle and the vehicle boarding signal of the occupant by the control unit 300, the step of operating the light source unit 220 for a predetermined time from the time of starting the vehicle (On) to before the boarding of the passenger;
Operating the navigation 320; And
The control unit 300 receives the destination arrival signal through the navigation 320 and the vehicle starting off signal, and the light source unit 220 for a predetermined time from the destination arrival signal receiving time to the vehicle starting off time. Method of controlling a vehicle air conditioner having a photocatalyst module comprising the step of operating.

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