KR20070052446A - Air conditioning system and controlling method thereof - Google Patents

Abstract

The present invention relates to an air conditioning system and a control method thereof, and more particularly, to an air conditioning system and a method of controlling the air cleaning function and the ventilation function to be automatically set and controlled by a detected value detected by a pollution degree sensor. .

An air conditioning system according to the present invention includes a controller provided with a key input unit for setting the operation mode to automatic operation; A signal receiving unit receiving an automatic driving command input by the controller, a pollution detecting sensor detecting a pollution level of indoor air, a signal receiving unit and the pollution detecting sensor connected to the signal receiving unit and receiving an automatic driving command input from the controller, And a control unit configured to receive a pollution degree detected by the pollution detection sensor and set a volume of air according to the pollution degree. And an electrothermal heat exchanger including a control unit for receiving a signal from the control unit of the ventilation cleaning apparatus, and a driving unit for driving a fan motor or the like according to a command transmitted from the control unit.

In addition, the control method of the air conditioning system according to the present invention includes the steps of applying power to the air conditioning system; Setting the air conditioning system to the automatic operation mode; Determining an indoor air pollution level by at least one air pollution detection sensor when the automatic driving mode is set; Determining the fan air volume of the air conditioning system according to the pollution degree determined by the pollution degree sensor; And a rotation speed of the fan is determined according to the determined fan air flow rate to drive the fan.

By the above air conditioning system and its control method, there is an effect that the single or interlocking operation function of the ventilation cleaner and the heat exchanger is automatically set.

Ventilation Cleaner, Heat Exchanger, Pollution Degree Sensor

Description

Air conditioning system and controlling method

1 is an external perspective view of a ventilation cleaning device constituting the air conditioning system according to the spirit of the present invention,

2 is an exploded perspective view of the ventilation cleaning apparatus.

Figure 3 is an exploded perspective view showing a state of air flow in the ventilation cleaning apparatus is set the ventilation function.

Figure 4 is a perspective view showing a state of air flow in the ventilation cleaning device is set the cleaning function.

5 is a block diagram showing the configuration of an air conditioning system according to the spirit of the present invention.

6 is a cross-sectional view showing the flow of air inside the air conditioning system.

7 is a plan view showing the configuration of a controller constituting the air conditioning system according to the spirit of the present invention.

Figure 8 is a block diagram schematically showing the configuration of an air conditioning system according to the spirit of the present invention.

9 is a flowchart illustrating a process of determining the air volume of the fan when the air conditioning system is set to the automatic operation mode.

10 is a flowchart showing a process of determining the pollution degree by the VOC sensor in the automatic operation mode of the air conditioning system according to the present invention.

11 is a flowchart showing a process of determining the pollution degree by the gas sensor in the automatic operation mode of the air conditioning system according to the present invention.

12 is a flowchart showing a process of determining the pollution degree by the CO ₂ sensor in the automatic operation mode of the air conditioning system according to the present invention.

FIG. 13 is a flowchart illustrating a process of determining an air volume in an automatic operation mode of an air conditioning system according to the spirit of the present invention; FIG.

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

10: air cleaner 11: front cover

12: cover guide 13: filter

14: discharge grill 15: pan

16: rear panel 17: installation case

18: installation bar 30: duct member

31: air supply duct 32: exhaust duct

40: electric heat exchanger

The present invention relates to an air conditioning system and a control method thereof, and more particularly, to an air conditioning system and a method of controlling the air cleaning function and the ventilation function to be automatically set and controlled by a detected value detected by a pollution degree sensor. .

In general, when a living organism breathes for a certain period of time in a space that is blocked from outdoor air, the amount of carbon dioxide increases in the room, which interferes with the living breathing. Therefore, indoor space should be ventilated frequently in a space where many people stay together, such as an office, or in a narrow space such as a vehicle. At this time, a commonly used ventilation system.

In detail, the ventilation system is generally a device that is installed on the indoor floor or fixedly mounted on the ceiling, such that outdoor air is introduced into the room and indoor air is discharged to the outside. Therefore, the installation of the ventilation system is required in a space where the circulation of indoor air is not smooth or a space where many people stay.

However, in the conventional general ventilation system, only a clean device for cleaning indoor air or a ventilation device for circulation of indoor air and outdoor air is installed. In other words, when the ventilation device is operated in winter when the temperature difference between the outdoor air and the indoor air is remarkable, there is a problem that the indoor temperature is lowered and the heating efficiency is significantly lowered.

In addition, since the air cleaning device does not have a function of circulating the indoor air and the outdoor air, there is a disadvantage that can not be ventilated even though ventilation is required. In addition, there is a disadvantage in that the cleaning or ventilation function is not properly performed automatically according to the degree of pollution of the indoor air.

In addition, in the case of the conventional ventilation or clean device, the ventilation and the clean function cannot be operated simultaneously or in conjunction with the degree of pollution of the indoor air, and the user must directly enter the operation mode, thereby limiting the optimal indoor environment to be maintained. There are drawbacks to this.

The present invention has been proposed in order to solve the above problems, and the ventilation function and the clean function can be performed simultaneously or alone, and the air conditioner to automatically perform the clean function or the ventilation function according to the degree of pollution of the indoor air. It is an object to provide a system and a control method thereof.

According to an aspect of the present invention, there is provided an air conditioning system, including: a controller having a key input unit configured to set an operation mode to automatic operation; A signal receiving unit receiving an automatic driving command input by the controller, a pollution detecting sensor detecting a pollution level of indoor air, a signal receiving unit and the pollution detecting sensor connected to the signal receiving unit and receiving an automatic driving command input from the controller, And a control unit configured to receive a pollution degree detected by the pollution detection sensor and set a volume of air according to the pollution degree. And an electrothermal heat exchanger including a control unit for receiving a signal from the control unit of the ventilation cleaning apparatus, and a driving unit for driving a fan motor or the like according to a command transmitted from the control unit.

In addition, the control method of the air conditioning system according to the present invention includes the steps of applying power to the air conditioning system; Setting the air conditioning system to the automatic operation mode; Determining an indoor air pollution level by at least one air pollution detection sensor when the automatic driving mode is set; Determining the fan air volume of the air conditioning system according to the pollution degree determined by the pollution degree sensor; And a rotation speed of the fan is determined according to the determined fan air flow rate to drive the fan.

By the above air conditioning system and its control method, there is an effect that the single or interlocking operation function of the ventilation cleaner and the heat exchanger is automatically set.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily made by adding, changing, or deleting other elements. I can suggest.

1 is an external perspective view of a ventilation cleaning apparatus constituting an air conditioning system according to the spirit of the present invention, and FIG. 2 is an exploded perspective view of the ventilation cleaning apparatus.

1 and 2, the ventilation cleaning apparatus 10 according to the present invention includes a front cover 11 having an air inlet formed at a central portion thereof, a cover guide 12 on which the front cover 11 is seated, The discharge guide 14 is mounted on the cover guide 12 by a sliding method, and an air discharge grill 141 is formed at a side thereof, and is stacked below the discharge grill 14 to suck in indoor air. A filter 13 for filtering out foreign substances contained in the filter and removing odors, a control box 19 coupled to a lower edge of the discharge grill 14, and a lower side of the cover guide 12. The control panel 21 to be coupled, and the shielding member 23 for selectively shielding the discharge grill 141 formed on the side of the discharge grill 14. In detail, the control box 19 has a main PCB board for controlling the operation of the ventilation cleaning device 10 is embedded, and the PCB board corresponds to a control unit for controlling the operation of the ventilation cleaning device 10. Micom is equipped. In addition, a rear surface of the control panel 21 is mounted with a display PCB substrate for displaying the operating state of the ventilation cleaning apparatus 10. In addition, when the ventilation cleaner 10 is mounted at a corner portion where the wall surface and the ceiling meet, the portion of the discharge grill 141 of the discharge grill 14 covered by the wall is shielded by the shield member 23. Be sure to Then, air is discharged through the front and one side of the discharge grill 141 of the discharge grill 14.

In addition, the ventilation cleaning device 10 is provided on the upper side of the filter 13 and the fan 15 for sucking indoor air or outdoor air, and detachably coupled to the lower side of the discharge grill 14, The shroud 145 for guiding the flow of indoor or outdoor air sucked by the fan 15, the fan motor 20 for driving the fan, and the fan motor 20 are mounted and exhausted at one side. A rear panel 16 to which the duct and the air supply duct are connected is included.

In addition, the ventilation cleaning apparatus 10 is coupled to the upper side of the rear panel 16 to the base panel 22 to reinforce the strength of the rear panel 16, and is coupled to one side of the rear panel 16 An installation case 17 for easily coupling the exhaust duct and the air supply duct and a detachable coupling to an upper side of the rear panel 16 to easily mount the rear panel 16 to a wall or a ceiling. An installation bar 18 is included. In detail, the installation case 17 is provided with an inlet 173 through which outdoor air is sucked and an exhaust port 172 through which the indoor air is discharged to the outside. In addition, the rear panel 16 is also provided with an inlet 163 and an exhaust port 162 at points facing the inlet port 173 and the exhaust port 172. Therefore, the indoor air and the outdoor air can enter and exit the inside of the ventilation cleaning apparatus through the intake ports 163 and 173 and the exhaust ports 162 and 172.

Hereinafter, the flow of air in the clean mode or the ventilation mode in the state where the ventilation cleaner is installed indoors will be described with reference to the accompanying drawings.

3 is an exploded perspective view showing a state of air flow in the ventilation cleaning apparatus in which the ventilation function is set.

Referring to FIG. 3, the ventilation cleaner 10 may be attached to the ceiling, and the inlet 173 and the exhaust port 172 of the installation case 17 may be connected to the duct member 30 penetrating the wall. Here, according to the shape of the installation case 17 can also be connected to the duct member 30 penetrating the ceiling, the description thereof will be omitted.

In detail, the duct member 30 includes an intake duct 31 for introducing outdoor air into the ventilation cleaning apparatus 10 and an exhaust duct 32 for discharging the indoor air to the outside.

In more detail, when the ventilation mode is selected, outdoor air is introduced through the air supply duct 31, and the introduced outdoor air is inlet 173 of the installation case 17 and inlet 163 of the rear panel 16. Through the ventilation clean device 10 is introduced into. The outdoor air introduced through the inlets 163 and 173 is filtered from the lower side of the filter 13 stacked on the bottom surface of the discharge grill 14 to the upper side, and the foreign matter is filtered out. In addition, the purified outdoor air passing through the filter 13 moves to the space between the discharge grille 14 and the rear panel 16. In addition, the air passing through the filter 13 by the rotation of the fan 15 is dispersed in the horizontal direction, and is discharged into the room through the discharge grill 141 formed on the side of the discharge grill 14.

Meanwhile, in the ventilation mode, indoor air is sucked into the exhaust grill 148 formed at the side edge portion of the discharge grill 14. Here, the exhaust grill 148 is bent along the edge of the exhaust port 162 at the point where the exhaust port 162 of the rear panel 16 is formed. The indoor air sucked into the exhaust grill 148 is immediately moved to the exhaust ports 162 and 172, and the indoor air passing through the exhaust ports 162 and 172 is discharged to the outside through the exhaust duct 32.

4 is a perspective view illustrating a state of air flow in a ventilation cleaning apparatus in which a cleaning function is set.

Referring to FIG. 4, when the clean mode is set in the ventilation cleaner 10, the flow of outdoor air and indoor air through the air supply duct 31 and the exhaust duct 32 does not occur. This is because the heat exchanger 40, which will be described later, is connected to the duct member 40, and the heat exchanger 40 does not operate in the clean mode. Detailed description thereof will be described later.

In detail, when the clean mode is set, the indoor air is sucked into the ventilation clean device 10 through the indoor intake port 111 formed in the front cover 11. Then, the suctioned indoor air is purified while passing through the filter 13, and then discharged back into the room through the discharge grill 141 formed on the discharge grill 14.

In more detail the flow of air in the clean mode, first, the indoor air is sucked through the indoor air inlet 111 by the driving of the fan 15. The sucked indoor air is filtered while passing through the filter 13, and passes through the orifice 143 to reach the fan 15. Then, the air reaching the fan 15 is dispersed in the horizontal direction, guided by the air guide 144 is discharged back to the room through the discharge grill 141.

5 is a block diagram showing the configuration of an air conditioning system according to the spirit of the present invention, Figure 6 is a cross-sectional view showing the flow of air in the air conditioning system.

5 and 6, the air conditioning system according to the present invention includes a ventilation cleaning device 10, an electrothermal heat exchanger 40 connected to the ventilation cleaning device 10 by a duct member 30, and A controller 90 is connected to the ventilation clean device 10 in a wired or wireless manner so that the ventilation and / or clean mode is selected.

In detail, the duct member 30 includes an air supply duct 31 and an exhaust duct 32 as described above, and one end thereof is connected to an inlet 173 and an exhaust port 172 of the ventilation cleaner 10. And the other end is connected to the heat exchanger 40. In addition, an air supply connection pipe 33 and an exhaust connection pipe 34 are interposed between the duct member 30 and the heat exchanger 40, so that the coupling between the heat exchanger 40 and the duct member 30 is securely performed. Can be done.

In addition, the heat exchanger (30) allows the outdoor air introduced into the room and the indoor air discharged to the outside to exchange heat with each other, thereby preventing the indoor temperature from dropping or increasing by the outdoor air introduced into the room. That is, when the indoor temperature is higher than the outdoor temperature, heat is transferred from the air discharged to the air to the air flowing into the room, thereby narrowing the temperature difference between the indoor temperature and the air flowing into the room, thereby rapidly changing the indoor temperature. You can stop it.

In detail, the heat exchanger 40 is opposed to the exhaust inlet port 42 formed on one side of the outer circumferential surface, an air supply outlet 43 formed at a predetermined distance from the exhaust inlet port 42, and the exhaust inlet port 42. An exhaust discharge port 44 formed at a position, an air supply suction port 45 formed at a position opposed to the air supply discharge port 43, and a heat exchange element 41 are included. In more detail, the total heat exchange element 41 is a device installed inside the heat exchanger 40 and is configured to allow only heat exchange without mixing outdoor air and indoor air introduced into the heat exchanger 40. .

In addition, an exhaust fan 47 mounted inside a conduit connecting the exhaust intake port 42 and the exhaust discharge port 44 and an exhaust fan 47 installed in the conduit connecting the air supply intake port 45 and the air supply outlet 43 are provided. The air supply fan 46 is further included.

In detail, the exhaust inlet 42 is formed on the same side as the air supply outlet 43, and the exhaust outlet 44 is formed on the same side as the air supply inlet 45. The position of the exhaust inlet 42 and the air supply outlet 43 or the positions of the exhaust outlet 44 and the air supply inlet 45 may vary depending on the type of the total heat exchanger 40.

In more detail, the exhaust inlet 42 is connected to the exhaust connection pipe 34 to allow the indoor air discharged from the ventilation cleaner 10 to flow. In addition, the air supply discharge port 43 is connected to the air supply connection pipe 33 to allow the outdoor air to be supplied to the ventilation cleaner 10.

On the other hand, the user is able to control the ventilation cleaning device 10 and / or the heat exchanger 40 to operate alone or in conjunction with the operation button provided in the controller (90). In other words, when the user selects a ventilation mode, the ventilation cleaner 10 and the heat exchanger 40 are driven together, thereby circulating indoor air and outdoor air. In addition, when the clean mode is selected, only the ventilation cleaning device 10 is operated so that the indoor air is purified inside the ventilation cleaning device 10 and discharged back to the room.

In addition, the inside of the air cleaning device 10 is equipped with a CO ₂ sensor or VOC sensor. In detail, the CO ₂ sensor is a sensor for detecting the amount of carbon dioxide contained in the indoor air, and is used as a method capable of measuring the pollution degree of the indoor air. The VOC sensor is a sensor for measuring the concentration of VOC contained in the indoor air, and is used as a sensor for detecting how much harmful substance is contained in the indoor air. Here, VOC (Volatile Organic Compounds) refers to a volatile organic compound, and refers to all organic compounds that exist in the gas phase in the atmosphere, although they may exist in the liquid or solid phase at normal temperature and pressure. When the VOC is contained in a large amount in the air, such as respiratory disease, allergic skin disease, headache, etc., very unpleasant and harmful effects on the human body. In addition, a gas sensor for detecting a gas harmful to the human body other than volatile organic compounds present in the room is mounted inside the air cleaning device 10 or attached to a wall to be connected to the control unit of the air cleaning device 10 by wire. You can do that. In addition, the pollution value of the indoor air may be measured using the detected values detected by the respective sensors, and the ventilation and / or clean function may be automatically performed according to the measured pollution degree.

Hereinafter, the flow of air in the air conditioning system having the above configuration will be described.

First, when the ventilation mode is selected by the user's command or the automatic function by the sensor, the fan 15 mounted in the ventilation cleaner 10 and the air supply fan 46 mounted in the heat exchanger 40 and The exhaust fan 47 is rotated. In addition, outdoor air is introduced into the heat exchanger 40 by the rotation of the air supply fan 46, and indoor air is introduced into the heat exchanger 40 by the rotation of the exhaust fan 47. Then, the indoor air and the outdoor air exchange heat while passing through the total heat exchange element 41. The heat exchanged outdoor air is introduced into the ventilation cleaner 10 through the air supply duct 31, and the introduced outdoor air passes through the filter 13 of the ventilation cleaner 10. The outdoor air passing through the filter 13 is discharged into the room through the discharge grill 141 of the discharge grill 14.

7 is a plan view showing the configuration of a controller constituting the air conditioning system according to the spirit of the present invention.

Referring to FIG. 7, the controller 90 according to the present invention is connected to the ventilation cleaner 10 in a wired or wireless manner.

In detail, the remote control receiver is mounted on the front side of the ventilation cleaner 10 so that the operation command signal transmitted from the controller 90 is received by the remote controller receiver, and the received signal is internal to the ventilation cleaner 10. To be transmitted to the controller mounted on the. The control unit may drive a fan or the like according to the input command.

More specifically, the controller 90 includes a display window 96 indicating an operating state of an air conditioning system, a power key 91 for inputting an operation and a stop command of the system, and a reservation key 92 for reserving an operation time. ), A mode selection key 93 for selecting the ventilation mode or the clean mode, the air volume control key 94 for controlling the air volume of the fan provided in the ventilation cleaner 10 and the heat exchanger 40, Or a quick / sleep selection key 95 for selecting a power saving function.

Here, rapid function is an added function for two purposes. First, the driving speed of the air supply fan is made larger than the driving speed of the exhaust fan so that the amount of air introduced into the room is greater than the amount of air discharged to the outside. Therefore, the phenomenon that the outside polluted air flows into the indoor space equipped with the ventilation cleaning device is prevented. Second, the driving speed of the exhaust fan is larger than the driving speed of the air supply fan, so that the amount of air discharged to the outside is greater than the amount of air introduced into the room. Therefore, there is an effect that the polluted air present in the indoor space equipped with a ventilation clean device is quickly discharged to the outside.

In addition, the user presses the power key 91 to operate the air conditioning system, and the mode selection key 93 determines whether the clean function and the ventilation function are singly or interlocked. In addition, the user may adjust the rotation speed of the intake fan and / or the exhaust fan by pressing the air volume control key 94.

In detail, when the operation mode is selected by pressing the mode selection key 93 or when the operation mode is switched, the circulation selection may be performed in order from the ventilation clean mode to the clean mode and the clean mode to the automatic mode. In other words, when the air conditioning system is turned on by pressing the power key 91, the ventilation clean mode is set as the basic operation mode, and the mode selection key 93 is pressed twice to switch to the automatic mode. However, the mode switching order is not limited to the above embodiment and may be variously set.

In addition, even when the air volume is selected through the air volume control key 94, it is possible to circulate selection from the strong wind to the special strong wind, the special strong wind to the weak wind, and the circulation order may be variously combined.

8 is a block diagram schematically illustrating a configuration of an air conditioning system according to the spirit of the present invention.

Referring to FIG. 8, the air conditioning system according to the present invention comprises a ventilation clean device 10, a controller 90, and a heat exchanger 40, as described above.

In detail, the ventilation cleaning apparatus 10 may include a signal receiver 101 for receiving various signals transmitted from the controller 90, a controller 102 for receiving a command received from the signal receiver 101, and The driver 103 controlled by the controller 102 is included. In addition, the fan motor 20 is operated by the control signal sent to the driving unit 103. In addition, the control unit 102 is equipped with a CO ₂ sensor 104, VOC sensor 105 and gas sensor 106, so that the contamination value detected from the sensors are transmitted to the control unit. Then, the air volume of the fan is automatically determined according to the pollution degree value transmitted to the controller.

In addition, the heat exchanger 40 includes a control unit 401 that receives a control signal from the control unit 102 of the ventilation cleaning apparatus 10, and a driving unit 402 controlled by the control unit 401. In addition, the fan motor 403 is operated by the control signal sent to the driving unit 402. Here, the fan motor 403 includes both an air supply fan and an exhaust fan mounted inside the heat exchanger 40.

By the above configuration, when a user inputs an operation command through the controller 90, a command signal is transmitted to the signal receiving unit 101 of the ventilation cleaning apparatus 10. The signal received by the signal receiving unit 101 is transmitted to the control unit 102 to control the operation of the driving unit 103 according to the command received from the control unit 102. In addition, the driver 103 receiving the operation command from the controller 102 causes the fan motor 20 to be driven according to the operation command. In addition, the control unit 102 of the ventilation cleaning apparatus 10 and the control unit 401 of the heat exchanger 40 may be connected by wire or wirelessly to transmit and receive a signal. In addition, it will be apparent to those skilled in the art that the controller 90 and the controller of the ventilation cleaner 10 may also be connected by wire or wirelessly.

On the other hand, when the user inputs a command to operate the ventilation cleaner 10 and the heat exchanger 40 through the controller 90, the control unit 102 of the ventilation cleaner 10 is the heat exchanger. The operation command is sent to the control unit 40. The control unit 401 receiving the operation command sends an operation command to the driving unit 402 to operate the fan motor 403.

Hereinafter, a process of automatically operating the air conditioning system according to the present invention by the detection value detected by the pollution degree sensor will be described in detail.

FIG. 9 is a flowchart illustrating a process of determining an air volume of a fan when the air conditioning system is set to the automatic operation mode.

Referring to FIG. 9, the user presses the power key 91 provided in the controller 90 to turn on the system (S110), and automatic operation is selected according to a key input or a basic setting by the user (S111). ). When the automatic operation is selected, the fan of the ventilation cleaner 10 and the heat exchanger 40 is driven, and the pollution degree sensor is operated (S112). Here, when the automatic operation is set, it is preferable that the basic value is set so that the ventilation and clean functions are linked with each other, and a predetermined value (RPM) is set as the initial value of the fan speed. Alternatively, when the system is powered on, the fan is not initially driven, and the fan may be driven according to the determined air flow rate after the air flow is determined according to the sensing value sensed by the sensor.

On the other hand, when the power of the air conditioning system is turned on, the CO ₂ sensor, VOC sensor and gas sensor is operated to detect the pollution degree (S113). In addition, the pollution value detected from the sensors is transmitted to the control unit 102 of the ventilation cleaning device 10. Then, the transmitted pollution degree value is combined in the control unit 102 to determine the pollution degree of the indoor air (S114). Then, the fan air volume is determined according to the determined pollution degree (S115). In detail, the control unit 102 stores a data table for determining the fan air volume according to the pollution degree value, and the air volume value according to the pollution degree is determined by the data table.

In addition, when the fan air volume is determined by the controller, the fan speed according to the determined air volume is set, and the fan speed is changed to the set value (S116). In addition, the controller 102 determines whether there is a power off command according to the user's input of the power key 91 or the arrival of the reservation setting time (S117). Then, if there is a power off command, the system stops, and if no power off command is input, the contamination is continuously measured by the sensors. Then, the air volume is determined according to the measured pollution degree, and the process of changing the speed of the fan with the determined air volume is repeated.

10 is a flowchart illustrating a process of determining the pollution degree by the VOC sensor in the automatic operation mode of the air conditioning system according to the present invention.

Referring to FIG. 10, when the air conditioning system is set to the automatic driving mode, the VOC sensor is turned on (S120).

In detail, when the VOC sensor is turned on, the concentration of VOC present in the room is sensed (S121), and the pollution degree according to the detected value is determined.

On the other hand, the VOC concentration sensed by the VOC sensor is expressed as the ratio of the currently measured concentration value according to the previously measured concentration value.

In detail, the VOC concentration in the air is sensed every 10 seconds to determine the current pollution level by the average value for 2 minutes, and the air volume is determined by classifying the pollution level by comparing the relative values. The VOC concentration value is expressed by the resistance value of the VOC sensor.

For example, the resistance value of the VOC sensor is measured and averaged for 2 minutes at 10 second intervals, and the average value is the resistance value R ₀ of the first VOC sensor. Then, the resistance value is measured and averaged again for 2 minutes at intervals of 10 seconds, and then the average resistance value is set as the resistance value R _S. Then, the change rate (R _S / R ₀ ) of the resistance value according to the initial resistance value is calculated, and the pollution degree is determined by comparing the calculated change rate with the set value. As the change rate R _S / R ₀ of the resistance value increases, it is determined that the pollution degree is low.

R _S / R ₀ Pollution Pollution level 0.9 or more about 38 or less 0.8 or more and less than 0.9 medium 65 or less Less than 0.8 River Over 65

As shown in Table 1, it is determined whether the change rate (R _S / R ₀ ) is greater than or _equal to 0.9 (S122), and if determined to be greater than or _equal to 0.9, the contamination degree is determined as 'about' (S126). When it is determined that the change rate R _S / R ₀ is not 0.9 or more, it is determined whether the change rate is 0.8 or more and less than 0.9 (S123). If the change rate is determined to be 0.8 or more and less than 0.9, the pollution degree is determined as 'medium' (S127). When the change rate (R _S / R ₀ ) is not included in the range of 0.8 or more and less than 0.9, that is, the change rate is less than 0.8, the pollution degree is determined as 'strong' (S124). Then, the determined pollution degree is stored in the control unit (S125).

11 is a flowchart showing a process of determining the pollution degree by the gas sensor in the automatic operation mode of the air conditioning system according to the present invention.

Referring to FIG. 11, when the air conditioning system is set to the automatic driving mode, the gas sensor is turned on (S130).

In detail, when the gas sensor is turned on, the concentration of harmful gas existing in the room is detected (S131). In addition, the detected gas concentration is calculated by the change rate R _S / R ₀ by the method as shown in FIG. 10, and the pollution degree is determined according to the change rate R _S / R ₀ . The higher the rate of change, the lower the pollution degree is the same as the pollution degree measuring method of the VOC sensor.

R _S / R ₀ Pollution Pollution level 0.88 or more about 38 or less 0.76 or more but less than 0.88 medium 65 or less Less than 0.76 River Over 65

As shown in Table 2, it is determined whether the rate of change (R _S / R ₀ ) of the detected gas concentration value is 0.88 or more (S132), and if determined to be 0.88 or more, the pollution degree is determined as 'about' (S136). do. However, if the rate of change (R _S / R ₀₎ that is judged not to be at least 0.88, the whether or not the rate of change (R _S / R ₀₎ is at least 0.76 less than 0.88 is judged (S133). If the change rate (R _S / R ₀ ) is determined to be 0.76 or more and less than 0.88, the pollution degree is determined as 'medium' (S137). If it is determined that the change rate R _S / R ₀ is not greater than 0.76 and less than 0.88, that is, less than 0.76, the pollution degree is determined as 'strong' (S134). Then, the determined pollution degree is stored in the control unit 102 of the ventilation cleaning apparatus 10 (S135).

12 is a flowchart showing a process of determining the pollution degree by the CO ₂ sensor in the automatic operation mode of the air conditioning system according to the present invention.

Referring to FIG. 12, when the automatic driving mode is selected, the CO ₂ sensor is turned on (S140), and the concentration of CO ₂ present in the room is measured by the CO ₂ sensor (S141). Then, the pollution degree is determined according to the concentration value of the CO ₂ sensed by the CO ₂ sensor.

CO ₂ concentration (PPM) Pollution 500-700 about 700 to 900 medium More than 900 River

As shown in Table 3, it is determined whether the detected concentration of CO ₂ is more than 500PPM or less than 700PPM (S142), and if the concentration is determined to be more than 500PPM or less than 700PPM (S 146). On the contrary, if it is determined that the concentration is not more than 500PPM or less than 700PPM, it is determined whether the concentration is 700PPM or more and less than 900PPM (S143). And, if the concentration of CO ₂ is determined to be 700PPM or more and less than 900PPM, the pollution degree is determined as 'medium' (S147). However, if the concentration is determined to be 900PPM or more, the pollution degree is determined as 'strong' (S144).

On the other hand, when the indoor pollution degree is determined by the above process, the determined pollution degree value is stored in the control unit 102 of the ventilation cleaning apparatus 10 (S145).

FIG. 13 is a flowchart illustrating a process of determining an air volume in an automatic operation mode of an air conditioning system according to the inventive concept.

Referring to FIG. 13, when the air conditioning system is set to the automatic operation mode, the fan of the ventilation cleaner 10 or the heat exchanger 40 may be configured according to the pollution degree detected by the CO ₂ sensor, the gas sensor, and the VOC sensor. Clean alone or clean and ventilated interlock operation is determined.

In detail, when the automatic operation is set, the CO ₂ sensor, the gas sensor, and the VOC sensor are operated to calculate the pollution degree (S150). Then, each pollution degree calculated from the three sensors is calculated to determine the air volume according to the air volume value according to the pollution degree stored in the controller.

As shown in Table 4 above, an appropriate amount of air is determined by combining the degree of contamination detected by the three sensors.

In detail, the control unit 102 of the ventilation cleaning apparatus 10 connected to the three sensors determines whether any one of the three pollution values exists in the 'river' (S151). If at least one of the three pollution values exists, the air volume of the fan is set to “strong wind” (S155), and if there is no “river”, at least one of the three pollution values is at least one. It is determined whether there exists (S152). If at least one of the three pollution values is present, the air volume of the fan is set to 'middle wind' (S156). In addition, when none of the three pollution values is 'one', the air volume of the fan is set to 'weak air' (S153). Then, the fan speeds of the ventilation cleaner 10 and the heat exchanger 40 are changed according to the set air volume (S154), and the fan rotates at the changed rotation speed.

By the control method as described above, when the user sets the air conditioning system to the automatic operation mode, the indoor air is always optimal because the degree of pollution of the indoor air is detected in real time and the optimal fan air flow is determined according to the detected degree of pollution. There is an advantage to be maintained.

By the air conditioning system and the control method according to the present invention having the configuration as described above, there is an effect that the independent operation or interlocking operation of the ventilation cleaning apparatus and the total heat exchanger is automatically controlled according to the pollution degree of the indoor air. That is, according to the degree of contamination detected by the various pollution degree detection sensors connected to the control unit of the ventilation clean device, clean alone or ventilation and clean interlocking operation are determined, so that the indoor air is always kept in a comfortable state.

Claims (17)

A controller including a key input unit for setting the operation mode to automatic operation; A signal receiving unit receiving an automatic driving command input by the controller, a pollution detecting sensor detecting a pollution level of indoor air, a signal receiving unit and the pollution detecting sensor connected to the signal receiving unit and receiving an automatic driving command input from the controller, And a control unit configured to receive a pollution degree detected by the pollution detection sensor and set a volume of air according to the pollution degree. And And an electric heat exchanger including a control unit for receiving a signal from the control unit of the ventilation cleaning device and a driving unit for driving a fan motor according to a command transmitted from the control unit. The method of claim 1, The pollution detection sensor includes an air conditioner including a CO ₂ sensor for detecting the concentration of carbon dioxide and / or a VOC sensor for detecting the concentration of volatile organic compounds and / or a gas sensor for detecting the concentration of harmful gases other than carbon dioxide and volatile organic compounds. system. The method of claim 1, And the control unit combines the concentration values transmitted from the sensors to set the air volume according to the highest concentration value. The method of claim 1, At least one of the sensors is built in the ventilation cleaning apparatus, or installed on the outside of the air conditioning system, characterized in that connected to the control unit of the ventilation cleaning apparatus. Applying power to the air conditioning system; Setting the air conditioning system to the automatic operation mode; Determining an indoor air pollution level by at least one air pollution detection sensor when the automatic driving mode is set; Determining the fan air volume of the air conditioning system according to the pollution degree determined by the pollution degree sensor; And And determining a rotational speed of the fan according to the determined fan air flow rate to drive the fan. The method of claim 5, The pollution degree detected by the pollution detection sensor is divided into 'strong', 'medium' or 'weak' control method. The method of claim 5, The contamination detection sensor includes a VOC sensor, and the pollution degree by the VOC sensor is determined by the rate of change of the resistance value in the VOC sensor. The method of claim 7, wherein The rate of change of the resistance value is measured after the start of the operation of the VOC sensor, the average value (R ₀ ) of the resistances inside the VOC sensor measured for a predetermined time at a predetermined time interval, and then measured again for a predetermined time at a predetermined time interval The control method of the air conditioning system, characterized in that the rate of change (Rs / R ₀ ) of the average value (R _S ) of the resistances. The method of claim 7, wherein If the change rate of the resistance value is 0.9 or more, the pollution degree 'about', if more than 0.8 less than 0.9, the pollution degree 'medium', if less than 0.8, the pollution degree control method of the air conditioning system, characterized in that set. The method of claim 5, The pollution detection sensor includes a gas sensor, the pollution degree by the gas sensor is controlled by the change rate of the resistance value in the gas sensor, the control method of the air conditioning system. The method of claim 10, The change rate of the resistance value is measured after the start of the operation of the gas sensor, the average value (R ₀ ) of the resistances inside the gas sensor measured for a predetermined time at a predetermined time interval, and then measured again for a predetermined time at a predetermined time interval The control method of the air conditioning system, characterized in that the rate of change (Rs / R ₀ ) of the average value (R _S ) of the resistances. The method of claim 10, If the change rate of the resistance value is 0.88 or more, the pollution degree is 'about', the pollution degree 'mid' if 0.76 or more and less than 0.88, and the pollution degree 'strong' if less than 0.76. The method according to claim 7 or 10, The smaller the rate of change of the resistance value, the higher the pollution degree. The method of claim 5, The contamination level sensor control method of the air conditioning system characterized in that comprises a CO ₂ sensor and, contamination due to the CO ₂ sensor is determined by the concentration (PPM) of the carbon dioxide is detected by the CO ₂ sensor. The method of claim 14, When the concentration of carbon dioxide is 500PPM or more and less than 700PPM, the pollution degree is 'about', if the 700PPM or more and less than 900PPM, the pollution degree is 'medium', if the 900PPM or more control method of the air conditioning system, characterized in that the pollution degree is set. The method of claim 5, The determining of the fan air flow rate control method of the air conditioning system, characterized in that the fan air flow rate is determined by the highest pollution degree value among the pollution degree detected by the at least one air pollution degree sensor in the control unit. The method of claim 5, The determining of the fan air volume may be divided into 'strong wind', 'mid wind' or 'wet wind' according to the pollution degree in the control unit.

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