KR20190098473A - Air conditioner and the control method thereof - Google Patents

Abstract

An objective of the present invention is to provide an air conditioner and a control method thereof, wherein a ventilation mode of a plurality of operation modes can be preferentially operated to efficiently improve quality of indoor air. To this end, the air conditioner is operated in a plurality of operation modes for indoor air conditioning. Moreover, the operation modes include the ventilation mode in which exchange between the indoor air and outdoor air is performed. In addition, the air conditioner has a control unit controlling the ventilation mode to be operated in preference to remaining operation modes except for the ventilation mode of the operation modes.

Description

Air conditioner and air conditioner control method {AIR CONDITIONER AND THE CONTROL METHOD THEREOF}

The present invention relates to an air conditioner and a control method of an air conditioner, and more particularly, an air conditioner and an air conditioner capable of efficiently improving indoor air quality by first operating a ventilation mode among a plurality of operation modes. It relates to a control method of the machine.

In general, an air conditioner is a device that maintains a comfortable room by adjusting room temperature and humidity or ventilating indoor air according to a user's request.

Recently, by adding various functions such as dehumidification, humidification, cooling, heating, air purification, and ventilation to the air conditioner, technologies for maintaining indoor air comfortably according to the change of season according to the user's choice have been developed.

Factors that determine the quality of indoor air can be CO2, VOC (volatile organic compounds), fine dust, temperature, and humidity.

The plurality of elements may vary in efficiency depending on an operation mode in which an air conditioner is operated. For example, the air conditioner may be operated in a ventilation mode or an air cleaning mode to lower the concentration of CO 2, VOC, and fine dust contained in indoor air. In addition, it can be operated in any one operation mode of the humidification, dehumidification, heating, cooling mode to make the room temperature and humidity in a comfortable state.

In this case, the most suitable operation mode for improving the quality of the indoor air for each of the plurality of elements may be different from each other.

In particular, the CO2 and VOC contained in the indoor air has a great effect on the human body. The CO2 and VOC concentrations of the indoor air vary depending on which operation mode is preferentially operated, so the selection of the operation mode becomes a very important problem.

In addition, since there are differences in the parts that are operated for each of the plurality of operation modes, there is a difference in the energy consumption for operating each operation mode.

Due to these differences, it is necessary to select an operation mode that can more efficiently improve indoor air quality and reduce energy consumption, but it is difficult for a consumer to determine which operation mode to operate.

Korean Patent No. 10-1782838 is disclosed as a prior art for the air conditioner. The air conditioner of the prior art is adapted to be operated in a ventilation mode, a dehumidification mode, a humidification mode, and an air cleaning mode, respectively.

However, the prior art describes only the process of operating each operation mode individually, and there is no description of which operation mode to operate first, and thus it is not possible to efficiently implement indoor air quality and reduce energy consumption. There is this.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a method of controlling an air conditioner and an air conditioner that can improve the quality of indoor air efficiently by causing the ventilation mode to operate first among a plurality of operation modes. The purpose is to provide.

Another object of the present invention is to provide an air conditioner and a control method of the air conditioner which can minimize energy consumption by operating the ventilation mode in preference to the humidity control mode.

Still another object of the present invention is to provide an air conditioner and a method of controlling the air conditioner which can minimize the influence of indoor air pollutants on the human body.

Still another object of the present invention is to provide an air conditioner and a control method of the air conditioner which can prevent the operation of the ventilation mode from becoming too long.

Still another object of the present invention is to provide an air conditioner and a method of controlling the air conditioner, which can minimize the influence of poor indoor air quality when the ventilation mode is operated indoor air.

The air conditioner of the present invention for achieving the above object, in the air conditioner is operated in a plurality of operation modes for the air conditioning of the room, the plurality of operation mode is a ventilation mode in which the exchange of indoor air and outdoor air is made Including; And a control unit which controls the ventilation mode to operate in preference to the remaining operation modes except the ventilation mode among the plurality of operation modes.

The remaining operation mode may include one or more of a humidity control mode for adjusting the humidity of the indoor air, and an air cleaning mode for filtering the indoor air using a filter and then exhausting the indoor air back to the room.

When the remaining operation mode includes the humidity control mode and the air cleaning mode, the control unit is configured to operate the ventilation mode in preference to the humidity control mode and the air cleaning mode. Can be set.

When the automatic operation signal is received, the control unit may be set to the automatic operation mode in which the plurality of operation modes are operated in a predetermined order but the ventilation mode is preferentially operated.

The control unit may be set to stop the operation of the operation mode in operation and to operate in the ventilation mode when the operation condition of the ventilation mode is satisfied during any one of the remaining operation modes.

A timer for measuring an operating time of the ventilation mode; The operation time of the ventilation mode received from the timer may be set to the control unit to be equal to or greater than the minimum operating time set in the control unit. The controller may be set in the control unit such that the operating time of the ventilation mode received from the timer is less than the maximum operating time set in the controller. The ventilation mode may be set to be activated when the stopped time of the ventilation mode received from the timer is equal to or greater than the stop time limit set in the controller.

The control method of the air conditioner of the present invention is a control method of an air conditioner operated in a plurality of operation modes for indoor air conditioning, wherein the plurality of operation modes are ventilation modes in which indoor air and outdoor air are exchanged. It includes; The control unit controls the ventilation mode to operate in preference to the remaining operation modes except the ventilation mode among the plurality of operation modes.

The remaining operation mode includes at least one of a humidity control mode for adjusting the humidity of the indoor air, and an air cleaning mode for filtering the indoor air using a filter and then exhausting the indoor air back to the room; When the remaining operation mode includes the humidity control mode and the air cleaning mode, the ventilation mode may be operated in preference to the humidity control mode and the air cleaning mode.

It may be determined whether the operating condition of the ventilation mode is satisfied even when the ventilation mode is not operated or in any of the remaining operation modes, and may be operated in the ventilation mode when the operating condition of the ventilation mode is satisfied.

If at least one of the CO2 and VOC concentration detected in the indoor air deviates from the set standard may be operated in the ventilation mode.

When the stop time of the ventilation mode becomes longer than the stop time limit during operation in the remaining operation mode, the operation of the operation mode in operation may be stopped and operated in the ventilation mode.

If the maximum operation time during the operation of the ventilation mode is exceeded, the operation of the ventilation mode may be stopped and it may be determined whether any one of the remaining operation modes is operated.

Even when the pollution level of the indoor air satisfies a setting criterion during the operation of the ventilation mode, the ventilation mode may be maintained until the minimum operation time.

The remaining operation mode further includes an air supply mode for supplying outdoor air indoors when the indoor air is exhausted to the outside by the exhaust fan; The air supply mode may be operated in preference to the ventilation mode.

The remaining operation mode includes an air cleaning mode in which the indoor air is filtered using a filter and then discharged back to the room; An end condition in which the operation of the air cleaning mode is terminated may include both a first condition in which dust of indoor air satisfies a setting criterion and a second condition which is operated for a set time after satisfying the first condition. Can be.

The humidity control mode may be operated in preference to the air cleaning mode.

The plurality of operation modes further include an air supply mode for supplying outdoor air to the indoor when the indoor air is exhausted to the outside by the exhaust fan; The operation of the air supply mode may be performed when the operation condition of the air supply mode is satisfied by determining whether the air supply mode is operated before determining whether the ventilation mode and the remaining operation mode are operated.

According to the present invention, it is possible to efficiently improve the quality of indoor air by allowing the ventilation mode to operate preferentially among the plurality of operation modes.

In addition, it is possible to minimize the energy consumption by operating the ventilation mode prior to the humidity control mode.

In addition, by operating the ventilation mode preferentially, and the inactive state of the ventilation mode does not exceed the stop time limit, it is possible to keep the concentration of CO2 and VOC contained in the indoor air at a low state, so that pollutants in the indoor air Minimizing the impact on

In addition, the operating time of the ventilation mode does not exceed the maximum operating time to prevent the operation of the ventilation mode is too long to minimize the bad quality outdoor air affects the indoor air.

1 is a view showing a control configuration of an air conditioner of the present invention
2 is a flow chart showing a control method of an air conditioner according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

With reference to FIG. 1, the control structure of the air conditioner 1 by this invention is demonstrated.

The air conditioner (1) of the present invention, the control unit 10 for controlling to operate in a plurality of operation modes according to the indoor environmental conditions for indoor air conditioning, the first / which operates under the control of the control unit 10 Second blowers 21 and 22 are included.

The plurality of operation modes include a ventilation mode in which indoor air and outdoor air are exchanged, and an air cleaning mode in which indoor air is filtered using a filter and then discharged back into the room. Include.

The first blower 21 sucks indoor air or outdoor air and discharges it into the room, and the second blower 22 sucks indoor air or outdoor air and discharges it to the outside.

The air conditioner 1 may further include a dehumidification mode for dehumidifying indoor air by the dehumidifying unit 23 and a humidification mode for humidifying indoor air by the humidifying unit 24. The dehumidification mode and the humidification mode is called a humidity control mode.

The dehumidifying unit 23 is for cooling the air discharged into the room by the first blower 21 in the dehumidifying mode, for example, may be configured as an evaporator of the heat pump. In addition, the dehumidifying unit 23 absorbs moisture contained in indoor air and discharges it to outdoor air, a driving unit for rotating the dehumidifying rotor, and heating the outdoor air flowing to the dehumidifying rotor to regenerate the dehumidifying rotor. It may be made of a heating unit for providing heat.

The humidifier 24 is for heating the air discharged into the room by the first blower 21 in the humidification mode, for example, it may be configured as a condenser of the heat pump.

In addition, the air conditioner 1 further includes a filter (not shown) for filtering the air discharged into the room. The filter may be composed of a plurality of pre-filters, medium filters, hepa filters, etc., according to particle sizes capable of filtering foreign substances contained in air. In addition, when operating in the ventilation mode and the air cleaning mode, respectively, it may be configured to filter the foreign matter contained in the outdoor air and indoor air in the same filter, and to filter the foreign matter contained in the outdoor air and indoor air in different filters, respectively It can also be configured to.

On the other hand, a plurality of sensors may be provided to detect the indoor environmental conditions. The sensor may be provided in a sensing box (not shown) provided separately from the air conditioner 1, may be provided in the air conditioner 1, or may be individually provided at various locations in the room.

 The plurality of sensors may include a temperature sensor 51 for detecting a temperature of indoor air, a humidity sensor 52 for detecting humidity of indoor air, and a dust sensor 53 for detecting an amount of dust included in indoor air. ), A CO2 sensor 54 for detecting the amount of CO2 contained in the indoor air, and a VOC sensor 55 for detecting the amount of VOC (volatile organic compound) contained in the indoor air.

The indoor temperature, indoor humidity, dust concentration, CO2 concentration, and VOC concentration detected by the plurality of sensors are received by the controller 10 of the air conditioner 1.

The air conditioner 1 may be operated in an automatic operation mode which is automatically operated according to a condition in which a plurality of operation modes are set. The air conditioner 1 may be provided with an automatic operation button (not shown). When the user presses the automatic operation button, the air conditioner 1 may be operated in a required operation mode by detecting an indoor environmental condition.

In this case, the control unit 10 is set with priorities for a plurality of operation modes, and the ventilation mode is set to operate in priority over other operation modes. In this case, the operation of the ventilation mode in priority means that the automatic operation mode is operated in the order of the ventilation mode, the humidity control mode, the air cleaning mode, and the operation mode when the ventilation mode operation condition is satisfied while the humidity control mode or the air cleaning mode is in operation. This includes stopping the operating mode and starting the ventilation mode.

The factors for determining the quality of the indoor air include CO2, VOC, fine dust, temperature, and humidity. Among these, the standard for determining the pollution level of indoor air may be the concentration of dust, CO2, and VOC, which are pollutants. .

The efficiency of air conditioning may vary depending on which of the plurality of operation modes is operated. That is, the degree to which the concentration of CO 2 and VOC and fine dust is lowered may vary, and the degree to which temperature / humidity of indoor air varies.

Since the CO2 is not filtered by the filter, it can be operated in the ventilation mode to lower the concentration most efficiently.

Although the VOC has a slight effect even when operating in the air cleaning mode, it can be lowered more effectively than the air cleaning mode when operating in the ventilation mode.

The dust may be partially removed by operating in the ventilation mode and discharging to the outside, but the concentration may be most effectively reduced by filtering in the filter by operating in the air cleaning mode.

In the case of the temperature, instead of operating in the cooling mode or the heating mode, operating in the ventilation mode in which the heat exchange is performed between the indoor air and the outdoor air can make the indoor temperature comfortable. The total heat exchanger may be provided for heat exchange between the indoor air and the outdoor air during the ventilation for the total heat exchange.

In the case of the humidity it is possible to make the indoor humidity in a comfortable state most effectively by operating the dehumidification mode. Of course, instead of operating in the dehumidification mode may be configured to operate in a ventilation mode to control the indoor humidity within a limited range using outdoor air.

As a result, the operation mode for changing the factors that determine the quality of indoor air may vary according to each factor. In this case, it is most effective to operate the ventilation mode for elements that are not filtered in the filter such as CO2 and VOC, and to operate in the air cleaning mode for elements that are filtered in the filter such as dust.

In this case, since CO2 and VOC have a great effect on the human body, it is a very important criterion in determining the comfort of the indoor environment. Therefore, when operating in the automatic operation mode, the control unit 10 is set so that the ventilation mode is most preferentially operated among the plurality of operation modes.

In addition, the operating conditions of the ventilation mode are always monitored in the state in which the operation of the ventilation mode is stopped, including when the operation mode other than the ventilation mode is in operation, and the operation mode is stopped when the operating condition of the ventilation mode is satisfied. And the ventilation mode is activated.

The air conditioner 1 may be further provided with a timer 31 for measuring the operating time of the ventilation mode.

When the operation of the ventilation mode is started, the timer 31 measures the operation time. The control unit 10 may be set to the minimum operating time of the ventilation mode. When it starts to operate in the ventilation mode, the state change of the indoor air can be determined by exchanging the indoor air and the outdoor air only when the operating time is over the minimum operating time, and at least a significant degree of ventilation effect can be generated.

In addition, the control unit 10 may be set to the maximum operating time of the ventilation mode. When operating in the ventilation mode, the outdoor air flows into the room, so the quality of the indoor air is affected by the quality of the outdoor air. If the operation time of the ventilation mode is longer than necessary, the quality of the indoor air will be bad if the quality of the outdoor air is bad, and the operation time of the ventilation mode will be too long because the operation of the ventilation mode must be started again to improve the quality of the bad indoor air. do. Therefore, it is necessary to limit the time that the ventilation mode is operated at maximum to within the maximum operation time.

In addition, the control unit 10 may be set to the stop time limit of the ventilation mode. The stop time limit is set so that the stop state in which the ventilation mode is not operated for a predetermined time does not last too long.

The driving mode may further include an air supply mode for supplying outdoor air indoors. The air supply mode refers to a mode in which the outdoor air is supplied to the indoor space, but the indoor air is not exhausted to the outdoors. For example, when cooking in a kitchen, an exhaust fan (not shown) may be operated to exhaust the contaminated air to the outdoors or to exhaust the contaminated air to the outdoors. When the exhaust fan is operated, a negative pressure is formed inside the indoor space, and exhaustion is not performed smoothly. If the exhaust fan is continuously operated in this state, noise and vibration are gradually increased. In order to prevent such a problem, by operating in the air supply mode in which the outdoor air is supplied to the indoor air can quickly exhaust the polluted air in the indoor space by the exhaust fan to the outside, and prevent the negative pressure is formed in the indoor space to exhaust By operating the fan, noise and vibration can be minimized. The air supply mode operates in priority to all operation modes such as a ventilation mode, humidity control mode, and air cleaning mode to prevent the polluted air from spreading to other indoor spaces, and increases the exhaust efficiency to quickly discharge the polluted air to the outside. Can be.

A control method of an air conditioner according to the present invention will be described with reference to FIG. 2.

When the user presses the automatic operation button, the automatic operation mode is started.

When the automatic operation mode is started, it may be performed to determine whether to operate in the air supply mode in preference to the ventilation mode. As the user uses the bathroom or the kitchen, it is determined whether a signal for operating the exhaust fan of the bathroom or the kitchen is received by the control unit 10. By supplying the indoor air, the polluted air in the indoor space can be quickly exhausted to the outdoor. Determination and operation of the operation of the air supply mode can be configured to be prioritized to the other operation mode at the same time as the start of the automatic operation mode.

In addition, before determining whether to operate the ventilation mode, it may be operated in the ventilation mode for a first predetermined time.

When the ventilation is performed during the first predetermined time, the indoor air and the outdoor air are mixed, and thus, more accurate indoor environmental conditions can be detected by the plurality of sensors. To this end, the first predetermined time may be appropriately set to a time determined that sufficient mixing of indoor air and outdoor air has been made. If it is a mode that can circulate or mix the indoor air instead of the ventilation mode may be operated in other modes, including the air cleaning mode.

In step S101, it is determined whether it is currently operating in the ventilation mode. If it is operated for the first predetermined time, the operation is in the ventilation mode, and therefore, the flow proceeds to step S102. Proceed to S103 at.

In step S102, it is determined whether the operation of the ventilation mode has satisfied the minimum operating time condition. Once the ventilation mode has been activated, it must be operated for at least the minimum operating time to produce a significant degree of ventilation effect. When the first preset time is set, the minimum operating time may be set longer or shorter than the first preset time. In addition, when the minimum operation time is shorter than the first setting time and ventilation is already performed during the first setting time, the operation may be configured to determine that the minimum operation time condition is already satisfied in step S102. In addition, even when ventilation is performed during the first predetermined time, it may be set to be further activated during the minimum operation time. In addition, whether to operate during the first predetermined time may be provided for the user to select, and the first predetermined time and the minimum operating time may be adjusted according to user selection. As a result of the determination in step S102, if the condition of minimum operating time is satisfied, The flow advances to step S104, otherwise the operation of the ventilation mode is performed until the condition of the minimum operating time is satisfied.

In step S103, it is determined whether the stopped time of the ventilation mode is equal to or greater than the second predetermined time. The second preset time is the stop time limit of the ventilation mode described above. The timer 31 counts the time after the operation of the ventilation mode is stopped, and proceeds to step S104 when the stopped time of the ventilation mode reaches the second set time, otherwise proceeds to step S111.

If the ventilation mode is in the stopped state to pass the stop time limit, the concentration of CO2 and VOC in the room may be increased, which may be harmful to the human body. Therefore, after determining the state of indoor air, the system may be operated in the ventilation mode. It is possible to prevent the concentration of VOC from increasing.

In this case, it is necessary to set the stop time limit to an appropriate time so that a long time is not set longer than necessary. If it is set to longer than necessary, there is a problem that the indoor air is contaminated by CO2 and VOC can be maintained for a long time. On the contrary, if the stop time limit is set too short, the room humidity is satisfied due to the frequent operation of the ventilation mode when the humidity of the outdoor air is high, such as during the rainy season, when the ventilation mode operation condition is satisfied during repeated operation of the dehumidification mode. This can increase the operating time of the dehumidification mode. Since the heat pump or the dehumidification rotor must be operated when the dehumidification mode is operated, the energy consumption is increased as compared with the case where the dehumidification mode is operated. Therefore, the stop time limit is preferably configured in consideration of this point.

In step S104, it is determined whether at least one of CO2 and VOC, which is a criterion for determining the degree of pollution of indoor air, is out of a set standard. It is determined whether the indoor CO2 concentration measured by the CO2 sensor 54 deviates from the setting standard, and determines whether the indoor VOC concentration measured by the VOC sensor 55 deviates from the setting standard. As a result of the determination, if at least one of the CO2 concentration and the VOC concentration deviates from the setting criteria, the process proceeds to step S105, otherwise, the process proceeds to step S111.

In step S105, it is determined whether the continuous operation time of the ventilation mode is less than the third predetermined time. The third preset time is the maximum operating time of the ventilation mode described above. As such, by limiting the maximum operating time of the ventilation mode to the third set time, it is possible to limit the influence on the indoor air when the quality of the outdoor air is poor.

For example, when the humidity of the outdoor air is high, such as during the rainy season, when the ventilation mode is operated for a long time, the indoor humidity may be increased to increase the operating time of the dehumidification mode. In the case of operating the dehumidification mode, a large amount of energy for operating the heat pump or the dehumidification rotor may be deteriorated, thereby reducing energy efficiency. Therefore, the operation efficiency of the air conditioner 1 can be improved by limiting the operation time of the ventilation mode to a certain time.

In addition, when there is a lot of CO2 in the outdoor air, when operating in the ventilation mode, since the concentration of CO2 must be continuously operated in the ventilation mode until it falls below the set standard, the operation of the ventilation mode may be continued for too long. Therefore, it is possible to prevent the deterioration of the indoor air quality by the outdoor air by allowing the ventilation mode to operate only during the maximum operating time.

As a result of the determination of the continuous operation time of the ventilation mode as described above, the flow advances to step S104 if it is less than the third set time, and to otherwise proceeds to step S111.

On the other hand, if the heat exchange between the indoor air and the outdoor air through the heat exchanger during the operation of the ventilation mode, it is possible to make the temperature of the indoor air in a comfortable state without using additional energy.

When the ventilation mode ends by the above process, the dehumidification mode is performed.

In step S111, it is determined whether there is a dehumidification function. The air conditioner 1 may have a dehumidifying function or may not have a dehumidifying function. If it is determined that there is no dehumidification function, the process proceeds to step S121, and if there is a dehumidification function, the process proceeds to step S112.

In step S112, it is determined whether the dehumidification operating condition is satisfied. The dehumidification operating condition is a condition for determining whether dehumidification is required. If it is determined that the dehumidification operation condition is satisfied, the process proceeds to step S113; otherwise, the process proceeds to step S121.

In step S113, the dehumidification mode is activated. In this case, the control unit 10 operates the first blower 21 and the dehumidifying unit 23 to dehumidify the indoor air and discharge it back to the room. The step S114 is carried out while the dehumidification mode is being operated.

In step S114, it is determined whether the dehumidification end condition is satisfied. If it is determined that the dehumidification end condition is satisfied, the flow advances to step S121; otherwise, operation of the dehumidification mode is maintained.

The dehumidification operation condition and the dehumidification end condition will be described.

The dehumidification operation may be determined based on a difference in current humidity measured by the humidity sensor 52 and a current humidity difference which is a preset humidity set in the controller 10. In this case, the control unit 10 is set to the humidity difference range.

That is, the upper limit value of the set humidity difference range is set to + 5%, and the lower limit value of the humidity difference range is set to -5%. When the current humidity difference is + 5% or more, the dehumidification operation conditions are met to operate in the dehumidification mode. When the current humidity difference is -5% or less, the dehumidification end condition is met, the dehumidification mode is terminated, and the operation proceeds to step S121.

If the current humidity difference is between the upper limit of + 5% and the lower limit of -5%, it can be configured to maintain the previous operating mode. That is, if the dehumidification mode is operated at least once after the start of the automatic operation mode, the dehumidification operation condition is satisfied and the dehumidification mode is operated. In order to satisfy the condition, the process proceeds to step S121 without being operated in the dehumidification mode.

The set humidity may be adjusted by the user, or may be configured to automatically set the humidity suitable for the current temperature.

While the steps S111 to S114 are in progress, the ventilation mode operating condition may be monitored, and if the ventilation mode operating condition is satisfied, the current step may be stopped and the ventilation mode may be operated.

Monitoring of the ventilation mode operating condition is performed by steps S101, S103, S104.

In the case where the steps S111 to S114 are in progress, it is not currently operating in the ventilation mode. Therefore, the determination result of step S101 proceeds to step S103. In step S103, it is determined whether the ventilation continuous stop time is greater than or equal to the second predetermined time. The timer 31 counts the time after the operation of the ventilation mode is stopped, and operates in the ventilation mode when the ventilation continuous stop time is greater than or equal to the second set time and the CO2 / VOC concentration is out of the set standard. If the continuous ventilation stop time is not more than the second set time or the CO2 / VOC concentration does not deviate from the set standard, the operation of the dehumidification mode is maintained. If the continuous operation time is more than the third set time after the ventilation mode is activated, the ventilation is performed. The mode operation ends and the flow proceeds to step S111.

Thus, by controlling the ventilation mode to prioritize the dehumidification mode, the concentration of CO2 / VOC of indoor air can be managed below the set standard, thereby minimizing the effect of CO2 and VOC on the human body. In addition, the energy consumption can be reduced by preferentially operating the ventilation mode in which the energy consumption is smaller than the dehumidification mode.

In the above description, the dehumidification mode, which is one of the humidity control modes, has been described. However, when the humidification function is provided, the first blower 21 and the humidifier 24 are controlled by the same method as described in steps S111 to S114 to the humidification mode. Can be operated.

When the dehumidification mode is finished by the above process, the air cleaning mode is performed. In addition, the dehumidification mode or the humidification mode is performed in preference to the air cleaning mode.

In step S121, it is determined whether the indoor dust meets the setting criteria. If the amount of dust in the indoor air detected by the dust sensor 53 satisfies the setting criteria, the indoor air condition is good, and therefore, the flow proceeds to step S123. Otherwise, the flow goes to step S122.

In step S122, the air cleaning mode is operated. The first blower 21 is operated to suck the indoor air, to filter the air from the filter, and to discharge the air back into the room. If the indoor dust meets the setting criteria by the operation of the air cleaning mode, the flow advances to step S123.

In step S123, in order to further start the air cleaning mode for the fourth set time, it is determined whether the air clean mode operating time is greater than or equal to the fourth set time.

Even if the dust of the indoor air satisfies the setting criteria, it is possible to minimize the amount of dust contained in the indoor air by additionally operating in the air cleaning mode for the fourth set time.

Therefore, the end condition of the air cleaning mode consists of satisfying both of the first condition that the dust of the indoor air satisfies the setting criteria and the second condition which is further operated during the fourth setting time.

While the respective steps of S121 to S123 are in progress, the ventilation mode operating condition may be monitored, and if the ventilation mode operating condition is satisfied, the current step may be stopped and the ventilation mode may be operated. When the operation of the ventilation mode is finished, the flow can proceed to step S111.

On the other hand, when cooking in the kitchen to operate the exhaust fan to exhaust the polluted air to the outside, or when the polluted air in the bathroom to operate the exhaust fan to exhaust the outdoor, the air supply mode is configured to operate in preference to the ventilation mode can do. In this case, the control unit 10 receives a signal for operating the exhaust fan, and when the signal is received, the air supply mode is preferentially operated even during any one of the ventilation mode, the humidity control mode, and the air cleaning mode. When the operation of the air supply mode is finished, the operation mode that was originally operated may be started again, or the flow may proceed to step S101.

According to the configuration as described above, it is possible to efficiently improve the quality of the indoor air by allowing the ventilation mode of the plurality of operation modes to operate preferentially. In addition, it is possible to minimize energy consumption by preferentially operating the ventilation mode.

As described above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above-described embodiments, and various modifications are made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It is possible to carry out by this and this also belongs to the present invention.

1: air conditioner 10: control unit
21: first blower 22: second blower
23: dehumidifier 24: humidifier
31: timer 51: temperature sensor
52: humidity sensor 53: indoor dust sensor
54: CO2 sensor 55: VOC sensor

Claims (19)

In the air conditioner operated in a plurality of operation modes for the air conditioning in the room,
The plurality of operation modes include a ventilation mode in which indoor air and outdoor air are exchanged;
And a control unit for controlling the ventilation mode to operate in preference to the remaining operation modes other than the ventilation mode among the plurality of operation modes. The method of claim 1,
The remaining operation mode includes at least one of a humidity control mode for controlling the humidity of the indoor air, and an air cleaning mode for releasing the indoor air after filtering the indoor air using a filter again. The method of claim 2,
When the remaining operation mode includes the humidity control mode and the air cleaning mode, the control unit is configured to operate the ventilation mode in preference to the humidity control mode and the air cleaning mode. Air conditioner characterized in that set The method of claim 1,
When the automatic operation signal is received, the control unit operates the plurality of operation modes in a predetermined order, but the air conditioner is set to operate the operation mode in which the ventilation mode takes precedence. The method of claim 1,
The control unit is configured to stop the operation of the operation mode in operation and operate in the ventilation mode when the operation condition of the ventilation mode is satisfied during operation in any one of the remaining operation mode. The method of claim 1,
A timer for measuring an operating time of the ventilation mode;
An air conditioner set in the control unit such that an operation time of the ventilation mode received from the timer is equal to or greater than a minimum operating time set in the control unit; The method of claim 1,
A timer for measuring an operating time of the ventilation mode;
An air conditioner set in the control unit such that an operating time of the ventilation mode received from the timer is less than a maximum operating time set in the control unit; The method of claim 1,
A timer for measuring an operation stop time of the ventilation mode;
An air conditioner configured to operate the ventilation mode when the stopped time of the ventilation mode received from the timer is equal to or greater than a stop time limit set in the controller; In the control method of the air conditioner is operated in a plurality of operation modes for the air conditioning in the room,
The plurality of operation modes include a ventilation mode in which indoor air and outdoor air are exchanged;
The control method of the air conditioner, characterized in that for controlling the operation of the ventilation mode in preference to the remaining operation mode other than the ventilation mode of the plurality of operation modes. The method of claim 9,
The remaining operation mode includes at least one of a humidity control mode for adjusting the humidity of the indoor air, and an air cleaning mode for filtering the indoor air using a filter and then exhausting the indoor air back to the room;
If the remaining operation mode includes the humidity control mode and the air cleaning mode, the ventilation mode is operated in priority to the humidity control mode and the air cleaning mode, characterized in that the control method of the air conditioner The method of claim 9,
It is determined whether the operation condition of the ventilation mode is satisfied even when the ventilation mode is not operated or in any of the remaining operation modes, and when the operating condition of the ventilation mode is satisfied, the ventilation mode is operated. Control method of air conditioner The method of claim 9,
If at least one of the CO2 and VOC concentration detected in the indoor air deviates from the set criteria, the control method of the air conditioner, characterized in that operated in the ventilation mode The method of claim 9,
The control method of the air conditioner, characterized in that for stopping the operation of the operation mode is in operation and operating in the ventilation mode when the stop time of the ventilation mode during the operation in the remaining operation mode is more than the stop time limit. The method of claim 9,
If the maximum operation time during the operation of the ventilation mode is exceeded, the operation method of the air conditioner, characterized in that the operation of the ventilation mode is stopped and it is determined whether any one of the remaining operation mode is operated. The method of claim 9,
The control method of the air conditioner, characterized in that the operation of the ventilation mode is maintained until the minimum operating time even if the pollution degree of the indoor air meets the setting criteria during the operation of the ventilation mode. The method of claim 9,
The plurality of operation modes further include an air supply mode for supplying outdoor air to the indoor when the indoor air is exhausted to the outside by the exhaust fan;
The air supply mode is controlled in priority to the ventilation mode, characterized in that the control method of the air conditioner The method of claim 9,
The remaining operation mode includes an air cleaning mode in which the indoor air is filtered using a filter and then discharged back to the room; An end condition for terminating the operation of the air cleaning mode may include both a first condition in which dust of indoor air satisfies a setting criterion and a second condition that is operated for a set time after satisfying the first condition. Control method of the air conditioner, characterized in that The method of claim 10,
The humidity control mode is a control method of the air conditioner, characterized in that to operate in preference to the air cleaning mode The method of claim 9,
The plurality of operation modes further include an air supply mode for supplying outdoor air to the indoor when the indoor air is exhausted to the outside by the exhaust fan;
The control method of the air conditioner, characterized in that the operation of the air supply mode is determined before the operation of the ventilation mode and the remaining operation mode is determined if the operation conditions of the air supply mode is satisfied.

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