WO2016032144A1

WO2016032144A1 - Ventilation cleaner and method for controlling same

Info

Publication number: WO2016032144A1
Application number: PCT/KR2015/008290
Authority: WO
Inventors: 홍현진; 한창수; 이찬희; 최영광; 허성환; 박찬정; 이경환
Original assignee: 코웨이 주식회사
Priority date: 2014-08-29
Filing date: 2015-08-07
Publication date: 2016-03-03

Abstract

A ventilation cleaner and a method for controlling the same are disclosed. The ventilation cleaner may comprise: a first cleaning module for purifying indoor air; a second cleaning module for purifying outdoor air; an air mixing unit for mixing indoor air, which has been purified by the first cleaning module, and outdoor air, which has been purified by the second cleaning module, respectively, and discharging the same through a discharge opening; a sensor unit for measuring the state of indoor and outdoor air; and a control unit for controlling the operation mode by adjusting channels of the first and second cleaning modules or by adjusting the flow rate of air introduced through the first and second cleaning modules, on the basis of the state of indoor and outdoor air measured by the sensor unit.

Description

Ventilation purifier and its control method

The present application relates to a ventilation purifier and a control method thereof.

Ventilation purifier is an air conditioning system equipped with a ventilation system for circulating the indoor air and a purifying system for purifying the indoor air, and a ventilation purifier having a structure in which air is introduced into the room through a filter by introducing outside air into a room is developed. have.

In this regard, Patent Document 1 described in the following prior art document discloses a ventilation cleaning device.

(Patent Document 1) Korean Patent Publication No. 2007-0107195 (Published: 2017.11.07.)

There is a need in the art for a method for more appropriately controlling the operation mode of the ventilation purifier according to the indoor and outdoor air conditions.

In order to solve the said subject, one Embodiment of this invention provides a ventilation purifier. The ventilation purifier may include a first cleaning module configured to purify indoor air; A second clean module for purifying outdoor air; An air mixing unit configured to discharge each of the indoor air purified by the first clean module and the outdoor air purified by the second clean module, respectively or through a discharge port; A sensor unit for measuring indoor and outdoor air conditions; And adjusting the flow path of the first clean module and the second clean module based on indoor and outdoor air conditions measured by the sensor unit, or air flowing through the first clean module and the second clean module. It may include a control unit for controlling the operation mode by adjusting the flow rate of.

On the other hand, another embodiment of the present invention provides a control method of the ventilation purifier. The control method of the ventilation purifier includes: a method of controlling a ventilation purifier having an indoor purifying module for purifying indoor air and an outdoor purifying module for purifying outdoor air, the method comprising: measuring conditions of indoor air and outdoor air; Determining whether the carbon dioxide concentration of the indoor air is above a first predetermined reference value or when the oxygen concentration is below a second predetermined reference value; When the carbon dioxide concentration of the indoor air exceeds the first reference value or the oxygen concentration is less than the second reference value, checking a temperature difference between the indoor air and the outdoor air; And controlling the flow path or the flow rate of the indoor clean module and the outdoor clean module according to the temperature difference to purify the outdoor air and introduce the clean air into the room, or to clean and discharge the indoor air and the outdoor air, respectively, and then discharge the mixed air. And controlling to operate in a clean mode.

In addition, the solution of the said subject does not enumerate all the characteristics of this invention. Various features of the present invention and the advantages and effects thereof may be understood in more detail with reference to the following specific embodiments.

According to one embodiment of the present invention, the indoor air can be optimally maintained by more appropriately controlling the operation mode of the ventilation purifier according to the indoor and outdoor air conditions.

1 is a block diagram illustrating a configuration of a ventilation purifier according to an embodiment of the present invention.

2 is a view showing a flow path formed when the ventilation purifier according to an embodiment of the present invention operates in the indoor cleaning mode.

3 is a view showing a flow path formed when the ventilation purifier according to the exemplary embodiment of the present invention operates in the ventilation cleaning mode.

4 is a view showing a flow path formed when the ventilation purifier according to an embodiment of the present invention operates in a room and a ventilation clean mode.

5 is a block diagram illustrating a configuration of a ventilation purifier according to another embodiment of the present invention.

6 is a diagram illustrating an example of a display unit included in a ventilation purifier according to an embodiment of the present invention.

7 is a flowchart of a control method of the ventilation purifier according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, in describing the preferred embodiment of the present invention in detail, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, throughout the specification, when a part is 'connected' to another part, it is not only 'directly connected' but also 'indirectly connected' with another element in between. Include. In addition, the term 'comprising' of an element means that the element may further include other elements, not to exclude other elements unless specifically stated otherwise.

Referring to FIG. 1, the ventilation purifier 100 according to an embodiment of the present invention may include a first cleaning module 110, a second cleaning module 120, an air mixing unit 130, an outlet 140, and a sensor unit. 150, the controller 160, and the display unit 170 may be included, and the wireless communication unit 180 may be further included as necessary.

The first clean module 110 is to purify the indoor air, and may include a first valve 111, a first flow path 112, and a first filter 113.

The first valve 111 is provided at one end of the first flow path 112 to open and close under the control of the controller 160 to form a flow path of the indoor air. When the first valve 111 is opened, the indoor air is It may flow into the first flow path 112. In addition, the first valve 111 may be partially opened or closed (that is, adjusting the opening ratio) to expand or reduce the flow path of the indoor air, thereby adjusting the flow rate of the indoor air.

The first flow path 112 is a passage through which indoor air moves, and a first valve 111 is provided at one end of the first flow path 112 and a first filter 113 at the other end of the first flow path 112. Can be connected.

The first filter 113 is connected to the other end of the first flow path 112 to purify by passing the indoor air introduced through the first flow path 112.

The second clean module 120 is for purifying outdoor air introduced from the outside and may include a second valve 121, a second flow path 122, and a second filter 123.

The second valve 121 is provided at one end of the second flow path 122 to open and close under the control of the controller 160 to form an outdoor air flow path. When the second valve 121 is opened, the outdoor air is opened. It may flow into the second flow path 122. In addition, the second valve 121 may be partially opened and closed to expand or reduce the flow path of the outdoor air, thereby adjusting the flow rate of the outdoor air.

The second flow path 122 is a passage through which outdoor air moves, and a second valve 121 is provided at one end of the second flow path 122 and a second filter 123 at the other end of the second flow path 122. Can be connected.

The second filter 123 is connected to the other end of the second flow path 122 to purify by passing outdoor air introduced through the second flow path 122.

The air mixing unit 130 is connected to the first clean module 110 and the second clean module 120, respectively, by the indoor air and second clean module 120 purified by the first clean module 110. The purified outdoor air is mixed and discharged through the discharge port 140.

In addition, when one of the flow paths of the first clean module 110 and the second clean module 120 is closed, the air mixing unit 130 purifies discharged from one

clean module

110 or 120 in which the flow path is formed. The discharged air may be discharged through the discharge port 140.

The air mixing unit 130 may be implemented as a positive suction fan that rotates in both directions to generate a flow of air.

The sensor unit 150 is for measuring the indoor and outdoor air conditions, for example, a gas sensor for measuring the concentration of carbon dioxide or oxygen in the air, a temperature sensor for measuring the temperature of the air, the amount of dust contained in the air It may include one or more of the dust sensor, the humidity sensor for measuring the humidity of the air, the radon sensor for measuring the concentration of radon in the air.

In FIG. 1, the ventilation purifier 100 is illustrated as including the sensor unit 150, but is not necessarily limited thereto.

For example, the ventilation purifier 100 may receive a measurement signal from a separate sensor. Here, the separate sensor may be a sensor installed indoors or outdoors of the space in which the ventilation purifier 100 is installed. In addition, the ventilation cleaner 100 may further include a wireless communication unit 180 to receive a measurement signal from a separate sensor, the wireless communication unit 180 may be implemented by a wireless communication technology such as Bluetooth, Wi-Fi, 3G. Can be.

In addition, the ventilation purifier 100 may receive an air condition-related signal from the outside (for example, a weather information provider or company such as a meteorological office) through the wireless communication unit 180 described above.

The controller 160 adjusts the flow paths of the first clean module 110 and the second clean module 120 based on the indoor and outdoor air conditions measured by the sensor unit 150, and thus, the first clean module 110. Indoor clean mode for purifying and discharging only indoor air by ventilation, ventilation clean mode for purifying only outdoor air by means of the second clean module 120, and the first clean module 110 and the second clean module ( 120), the indoor air and the outdoor air are respectively purified and controlled to operate in one of the indoor and ventilation clean modes of discharging and discharging. In addition, the controller 160 may control the operation mode of the ventilation cleaner 100 based on a signal received from a separate sensor or a weather information provider through the wireless communication unit 180 as described above.

For example, when the carbon dioxide concentration of the indoor air exceeds a predetermined reference value or the oxygen concentration is less than the predetermined reference value, or when the indoor radon concentration is above the predetermined reference value, the controller 160 purifies the outdoor air and introduces it into the room. The flow path of the first cleaning module 110 and the second cleaning module 120 may be controlled to operate in the ventilation clean mode. In this case, by further considering the temperature difference between the indoor air and the outdoor air, by controlling the flow path of the first clean module 110 and the second clean module 120, it is possible to prevent a sudden change in the indoor air temperature.

In addition, when the amount of dust in the indoor air or the amount of dust in the outdoor air exceeds a predetermined reference value, the controller 160 operates the first clean module 110 and the second clean module to operate in an indoor clean mode in which only the indoor air is purified and discharged. The flow path of 120 can be controlled.

In addition, the controller 160 controls the flow paths of the first clean module 110 and the second clean module 120 to maintain the appropriate humidity of the indoor air based on the humidity of the indoor and outdoor air and the temperature of the indoor air. can do.

Humidity according to the temperature of the indoor air can be represented as shown in Table 1, the control unit 160 to maintain the humidity according to the temperature of the indoor air of the first clean module 110 and the second clean module 120 The flow path can be controlled.

For example, when the indoor air temperature is 30 ° C., the humidity is 80%, the outdoor air temperature is 27 ° C., and the humidity is 60%, the outdoor air is relatively dry by opening the flow path of the second clean module 120. Can be introduced into the room to reduce the humidity of the room air.

Table 1

Indoor air temperature	Humidity
15 ℃ or less	70%
18-20 ℃	60%
21-23 ℃	50%
24 ℃ or more	40%

The controller 160 may be implemented by, for example, a processor such as a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor, an application specific integrated circuit (ASIC), or field programmable gate arrays (FPGA). Can be.

The display unit 170 may display the state of the indoor and outdoor air measured by the sensor unit 150 (for example, carbon dioxide concentration, radon concentration, contamination according to dust amount, temperature, relative humidity, etc.). In addition, the display unit 170 displays information on predetermined behavioral guidelines (eg, going out, refraining from going out, preparing a mask, etc.) based on the indoor and outdoor air conditions measured by the sensor unit 150. You may.

In addition, when the ventilation purifier 100 includes the wireless communication unit 180 as described above, the information displayed on the display unit 170 is controlled by the user through the wireless communication unit 180 under the control of the controller 160. The information may be transmitted to one mobile terminal (for example, a smartphone, a tablet, etc.) and the above information may be displayed through the mobile terminal.

To this end, an application for interworking with the ventilation cleaner 100 may be installed in the portable terminal. The portable terminal may display information received from the ventilation purifier 100 through the installed application, and further control the operation of the ventilation purifier 100 through the application.

Referring to FIG. 2, when the amount of dust in the indoor air or the amount of dust in the outdoor air exceeds a predetermined reference value, the controller 160 operates in an indoor clean mode in which only the indoor air is purified and discharged by the first clean module 110. The flow paths of the first clean module 110 and the second clean module 120 may be controlled.

Specifically, the controller 160 opens the first valve 111 of the first clean module 110 and closes the second valve 121 of the second clean module 120, as shown in FIG. 2. Only the passage of indoor air can be formed.

In this case, the controller 160 may expand the flow path by adjusting the opening and closing angle of the first valve 111 when the amount of dust is large according to the amount of dust in the indoor air, and reduce the induction when the amount of dust is small.

Referring to FIG. 3, when the concentration of carbon dioxide in the indoor air exceeds a predetermined reference value, the controller 160 operates in a ventilation clean mode in which outdoor air is purified and introduced into the room by the second clean module 120. The flow paths of the first clean module 110 and the second clean module 120 may be controlled.

Specifically, the controller 160 closes the first valve 111 of the first clean module 110 and opens the second valve 121 of the second clean module 120, as shown in FIG. 3. Only the flow path of outdoor air can be formed.

In this case, the controller 160 may expand the flow path by adjusting the opening and closing angle of the second valve 121 when the concentration is high according to the concentration of carbon dioxide in the indoor air, and may reduce the induction when the concentration is low.

Referring to FIG. 4, when the concentration of carbon dioxide in the indoor air exceeds a predetermined reference value and the temperature difference between the indoor air and the outdoor air exceeds a predetermined reference value, the controller 160 may include the first clean module 110 and the second clean filter. By controlling the flow path of the first clean module 110 and the second clean module 120 to operate in the indoor and ventilated clean mode to purify the indoor air and outdoor air by the clean module 120, and then mixed and discharged, It is possible to prevent sudden changes in the air temperature.

Specifically, the control unit 160 opens both the first valve 111 of the first clean module 110 and the second valve 121 of the second clean module 120, as shown in FIG. 4. Flow paths of air and outdoor air may be formed respectively.

In this case, the controller 160 reduces the flow path by adjusting the opening and closing angle of the second valve 121 when the temperature difference is large according to the temperature difference between the indoor air and the outdoor air, and opening and closing the second valve 121 when the temperature difference is small. The flow path can be extended by adjusting the angle.

For example, when the temperature difference between the indoor air and the outdoor air is different by 7 ° C. or more, the first valve 111 may be opened 100% and the second valve may be opened only 20%. However, when the carbon dioxide concentration of the indoor air is above a certain concentration, the second valve may be opened to 50% or more.

In addition, when the temperature difference between the indoor air and the outdoor air is 5 ° C. or more, the first valve 111 may open 100%, and the second valve may open only 40%.

In addition, when the temperature difference between the indoor air and the outdoor air is 3 ° C. or less, the first valve 111 may be opened at 0 to 50%, and the second valve may be open at 100%. However, the opening ratio of the first valve 111 may be adjusted according to the carbon dioxide concentration or the oxygen concentration of the indoor air.

In the above-described example, the determination criteria of the temperature difference and the opening ratio of the first and second valves are just examples, and may be changed by the designer.

The ventilation purifier 200 shown in FIG. 5 and the ventilation purifier 100 shown in FIG. 1 are partially in the detailed configuration of the first cleaning module 210, the second cleaning module 220, and the air mixing unit 230. There is a difference, and because of this, there is a difference in the method of controlling the operation mode of the ventilation purifier 200, and the rest are the same, the description will be mainly focused on the configuration and method with the difference.

The first clean module 210 and the second clean module 220 do not have a valve for controlling the flow path, and the first clean module 210 and the second clean module 220 do not have a valve for controlling the flow path. 223) may be configured to include only.

In addition, the air mixing unit 230 is not composed of a single suction fan as shown in Figures 2 to 4, but of the air flowing from the first clean module 210 and the second clean module 220 It may be configured to include a first motor 231 and a second motor 232 for controlling the flow rate, respectively.

In addition, the controller 260 adjusts the flow rate of the air flowing through the first clean module 210 and the second clean module 220 based on the indoor and outdoor air conditions measured by the sensor unit 250. Control to operate in any one of the indoor clean mode, the ventilation clean mode and the indoor and ventilation clean mode described above.

For example, when the carbon dioxide concentration of the indoor air exceeds a predetermined reference value or the oxygen concentration is less than the predetermined reference value, or when the indoor radon concentration is above the predetermined reference value, the controller 260 may control the first motor 231 and the second. By controlling the revolutions per minute (RPM) of the motor 232, the flow rate of the air flowing through the first clean module 210 and the second clean module 220 may be controlled to operate in the ventilation clean mode. . In this case, by further considering the temperature difference between the indoor air and the outdoor air by adjusting the flow rate of the air flowing through the first clean module 210 and the second clean module 220, to prevent a sudden change in the indoor air temperature can do.

In addition, when the dust amount of the indoor air or the dust amount of the outdoor air exceeds a predetermined reference value, the controller 260 adjusts the RPM of the first motor 231 and the second motor 232, respectively, the first clean module 210. ) And the second clean module 220 may be controlled to operate in the indoor clean mode by adjusting the flow rate of the air introduced through the second clean module 220.

As shown in FIG. 6, the display unit 170 displays the pollution degree (or cleanliness) measured by the dust sensor with respect to the indoor air by changing the color, for example, so that the user intuitively displays the pollution degree of the indoor air. You can check.

In addition, the display unit 170 may display the concentration of carbon dioxide in addition to the pollution degree measured by the dust sensor with respect to the outdoor air by a method such as color change, so that the user may intuitively check the pollution degree of the outdoor air.

In addition, the display unit 170 may display information on predetermined behavioral guidelines (eg, going out, refraining from going out, preparing a mask, etc.) based on the indoor and outdoor air conditions.

Referring to FIG. 7, first, a state of indoor air and outdoor air is measured using various sensors (eg, a gas sensor, a dust sensor, a temperature sensor, a radon sensor, etc.) (S10).

Then, it is checked whether the carbon dioxide concentration of the indoor air exceeds a predetermined reference value or the oxygen concentration is less than the predetermined reference value (S20).

If the carbon dioxide concentration of the indoor air exceeds a predetermined reference value (or the oxygen concentration is less than the predetermined reference value), the temperature difference between the indoor air and the outdoor air is checked (S30), and the indoor and outdoor flow paths are adjusted according to the temperature difference. Control to operate in the indoor and ventilated clean mode to purify the air to clean the air inlet or the indoor air and the outdoor air after mixing and purifying the mixed air (S40).

On the other hand, when the carbon dioxide concentration of the indoor air is below the predetermined reference value (or the oxygen concentration is above the predetermined reference value), it is checked whether the dust amount of the indoor air or the dust amount of the outdoor air exceeds the predetermined reference value (S50).

If the amount of dust in the indoor air or the amount of dust in the outdoor air exceeds a predetermined reference value, the control unit operates in an indoor clean mode in which only the indoor flow path is opened to purify and discharge only the indoor air (S60).

Although not shown in FIG. 7, it is determined whether the indoor radon concentration is greater than or equal to a predetermined reference value in the above-described step S20, and if this is the case, the carbon dioxide concentration exceeds the predetermined reference value. It can be controlled to operate in clean mode.

Here, since a specific method of controlling the indoor flow path and the outdoor flow path in each mode is as described above with reference to FIGS. 2 to 4, a detailed description thereof will be omitted.

The present invention is not limited by the above-described embodiment and the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be substituted, modified, and changed in accordance with the present invention without departing from the spirit of the present invention.

Claims

A first clean module for purifying indoor air;

A second clean module for purifying outdoor air;

An air mixing unit configured to discharge each of the indoor air purified by the first clean module and the outdoor air purified by the second clean module, respectively or through a discharge port;

A sensor unit for measuring indoor and outdoor air conditions; And

The flow path of the first cleaning module and the second cleaning module is adjusted based on the indoor and outdoor air conditions measured by the sensor unit, or the air flowing through the first cleaning module and the second cleaning module is adjusted. Ventilation purifier comprising a control unit for controlling the operation mode by adjusting the flow rate.
The method of claim 1, wherein the operation mode,

An indoor clean mode configured to purify and discharge only indoor air by the first clean module;

A ventilation clean mode in which only the outdoor air is purified and introduced into the room by the second clean module; And

And a indoor and a ventilation clean mode configured to purify and discharge indoor air and outdoor air by the first clean module and the second clean module, respectively.
The method of claim 2, wherein the first clean module,

A first flow path which is a passage through which indoor air moves;

A first valve provided at one end of the first flow path and opened / closed under the control of the controller; And

And a first filter connected to the other end of the first flow path and configured to pass and purify indoor air introduced through the first flow path.
The method of claim 3, wherein the second clean module,

A second flow path that is a passage through which outdoor air moves;

A second valve provided at one end of the second flow path and opened / closed under the control of the controller; And

And a second filter connected to the other end of the second flow path and configured to pass and purify outdoor air introduced through the second flow path.
The method of claim 4, wherein

The controller may be configured to operate in the ventilation clean mode when the carbon dioxide concentration of the indoor air exceeds a predetermined first reference value or the oxygen concentration is less than the predetermined second reference value, or when the indoor radon concentration is greater than or equal to the predetermined sixth reference value. A ventilation purifier for closing one valve and opening the second valve.
The method of claim 5, wherein

The control unit is a ventilation purifier to adjust the opening and closing angle of the second valve in accordance with the carbon dioxide concentration of the indoor air.
The method of claim 4, wherein

The controller may further include a third reference value in which carbon dioxide concentration of indoor air exceeds the first reference value, oxygen concentration is less than the second reference value, or indoor radon concentration is greater than or equal to a predetermined sixth reference value and a temperature difference between indoor air and outdoor air is predetermined. If more than, the ventilation purifier to open both the first valve and the second valve to operate in the indoor and ventilation clean mode.
The method of claim 7, wherein

The control unit is a ventilation purifier to adjust the opening and closing angle of the second valve in accordance with the temperature difference between the indoor air and the outdoor air.
The method of claim 4, wherein

The controller may be configured to open the first valve and close the second valve to operate in the indoor clean mode when the amount of dust of indoor air or the amount of dust of outdoor air exceeds a predetermined fourth reference value or fifth reference value, respectively. Ventilation purifier.
The method of claim 9,

The control unit is a ventilation purifier to adjust the opening and closing angle of the valve provided in the first cleaning module according to the amount of dust of the indoor air.
The method of claim 2,

The air mixing unit comprises a first motor and a second motor for controlling the flow rate of the air flowing through the first clean module and the second clean module, respectively.
The method of claim 11,

The controller may adjust the revolutions per minute (RPM) of the first motor and the second motor when the carbon dioxide concentration of the indoor air exceeds a predetermined first reference value or the oxygen concentration is less than a predetermined second reference value. A ventilation purifier for controlling to operate in the ventilation clean mode by controlling the flow rate of the air flowing through the clean module and the second clean module.
The method of claim 11,

The controller may include the first motor and the second motor when the carbon dioxide concentration of the indoor air exceeds the first reference value or the oxygen concentration is less than the second reference value and the temperature difference between the indoor air and the outdoor air exceeds a predetermined third reference value. Ventilation purifier for controlling to operate in the indoor and ventilation clean mode by controlling the flow rate of the air flowing through the first and second clean module by adjusting the RPM (Revolutions per minute) of the motor.
The method of claim 11,

When the amount of dust in the indoor air or the amount of dust in the outdoor air exceeds a predetermined fourth reference value or a fifth reference value, respectively, the controller adjusts revolutions per minute (RPM) of the first motor and the second motor, respectively, to adjust the first amount. Ventilation purifier for controlling to operate in the indoor clean mode by adjusting the flow rate of the air flowing through the clean module and the second clean module.
The method of claim 1, wherein the sensor unit,

A gas sensor that measures the concentration of carbon dioxide or oxygen in the air, a temperature sensor that measures the temperature of the air, a dust sensor that measures the amount of dust contained in the air, a humidity sensor that measures the humidity of the air, and a radon that measures the radon concentration in the air Ventilation purifier comprising at least one of the sensors.
The method of claim 1,

And a display unit which displays information on indoor and outdoor air conditions measured by the sensor unit and information on predetermined behavioral guidelines according to the indoor and outdoor air conditions.
The method of claim 1,

Further comprising a wireless communication unit for performing wireless communication,

And the control unit controls the operation mode based on the signal received through the wireless communication unit.
The method of claim 1,

Further comprising a wireless communication unit for performing wireless communication,

The control unit is a ventilation cleaner for transmitting indoor and outdoor air conditions measured by the sensor unit and information on a predetermined behavioral guideline according to the indoor and outdoor air conditions to the mobile terminal through the wireless communication unit.
A control method of a ventilation purifier having an indoor clean module for purifying indoor air and an outdoor clean module for purifying outdoor air,

Measuring conditions of indoor air and outdoor air;

Determining whether the carbon dioxide concentration of the indoor air is above a first predetermined reference value or when the oxygen concentration is below a second predetermined reference value;

When the carbon dioxide concentration of the indoor air exceeds the first reference value or the oxygen concentration is less than the second reference value, checking a temperature difference between the indoor air and the outdoor air; And

According to the temperature difference, the indoor clean module and the air purge mode of the outdoor clean module by controlling the flow rate or the flow rate of the outdoor air to clean the outdoor air or indoor air and outdoor air to clean and discharge the mixed air after cleaning the indoor and outdoor clean A control method of a ventilation purifier comprising the step of controlling to operate in the mode.
The method of claim 19,

And controlling the air purifier to operate in the indoor and the ventilation clean mode when the temperature difference between the indoor air and the outdoor air exceeds a third predetermined reference value.
The method of claim 19,

When the carbon dioxide concentration of the indoor air is equal to or less than the first reference value or the oxygen concentration is equal to or greater than the second reference value, checking whether the amount of dust in the indoor air or the amount of dust in the outdoor air exceeds a predetermined fourth reference value or a fifth reference value, respectively. ; And

When the amount of dust in the indoor air or the amount of dust in the outdoor air exceeds the fourth reference value or the fifth reference value, respectively, the indoor clean mode operates to clean only the indoor air by opening or adjusting the flow rate of the indoor clean module or controlling the flow rate. The control method of the ventilation purifier comprising the step of controlling to.
The method of claim 19,

Determining whether the indoor radon concentration is above a predetermined sixth reference value,

And controlling to operate in the ventilation clean mode or the indoor and ventilation clean mode according to the temperature difference between the indoor air and the outdoor air when the indoor radon concentration is equal to or greater than the sixth reference value.