TWI809348B - Air cleaning apparatus and method for controlling the same - Google Patents

Abstract

The present invention relates to an air purifier. The air purifier according to an embodiment of the present invention may include: a comprehensive purification degree sensor part for detecting the comprehensive purification degree of indoor air; a carbon dioxide sensor part for detecting carbon dioxide in the indoor air Concentration; an air purification unit including a blower fan and a filter member; and a control unit controlling the operation of the air purification unit based on the detection results of the comprehensive purification degree sensor unit and the carbon dioxide sensor unit. The control unit may control and adjust the air volume of the air cleaning unit according to the change of the carbon dioxide concentration detected by the carbon dioxide sensor unit. Therefore, when the user performs ventilation, the air purification is actively strengthened, thereby having the effect of being able to provide a more active and intelligent air purification function.

Description

Air purifier and its control method

The present invention relates to an air purifier and its control method. More specifically, it relates to an air purifier capable of guiding ventilation by detecting carbon dioxide in the room, and actively adjusting air purification by judging whether to perform ventilation or not and its control method. method.

An air cleaner refers to a device that, after inhaling polluted air in a room, performs a purification action of removing pollutants and the like from the inhaled air, and discharges the purified air. Generally, the air purifier can select the air cleaning function according to the user's control or according to the degree of pollutants distributed in the inhaled air, or automatically perform the air cleaning function.

As a conventional air cleaner, there is Korean Patent No. 10-1828936 (2018.02.07). In Korean Patent No. 10-1828936 (2018.02.07), based on the operating mode or the degree of pollution detected by the sensor device, the fans installed in a plurality of air purification modules are selectively driven or installed in the flow regulator The circulation fan of the device, thereby determining the air volume expelled from the air cleaner.

Such an air cleaner uses a filter to provide a function of filtering fine particles such as dust in the air and removing odors and the like.

However, in the case of such a conventional air cleaner, carbon dioxide cannot be filtered, and therefore, there is a limitation that a detection function for carbon dioxide cannot be provided. On the contrary, the user's actual requirements for the air purifier include overall purification and management of indoor air containing carbon dioxide.

prior art literature

patent documents

Patent Document 1: Korean Approved Patent No. 10-1828936.

The present invention is proposed in order to improve the aforementioned problems. The purpose of the present invention is to provide an air purifier and its control method, which judges whether to ventilate or not according to the variation of carbon dioxide concentration, and controls the air purifier according to the judgment result. The air volume is adjusted, so that when the user performs ventilation, a more active and intelligent air purification function can be provided by actively strengthening the air purification.

In addition, the purpose of the present invention is to provide an air purifier and its control method, which detects carbon dioxide and guides the user to take a breath when a predetermined amount or more of carbon dioxide is detected in the room, thereby providing indoor management of carbon dioxide. Function.

In addition, the object of the present invention is to provide an air purifier and its control method, which can provide a user terminal with a notification about ventilation guidance through a display or wireless communication, thereby providing the user with a variety of user interfaces. Ventilation information.

The purpose of the present invention is not limited to the above-mentioned purpose, and other unmentioned purposes and advantages of the present invention can be understood through the following description, and can be more clearly understood through the embodiments of the present invention. In addition, it will be easily understood that the objects and advantages of the present invention can be realized by means and combinations thereof indicated in the appended claims.

In order to achieve the above-mentioned purpose, according to an embodiment of the present invention, the air purifier is located indoors and adjusts the air purification by detecting the air in the room, which may include: an integrated cleanliness sensor unit, which is used to detect the air in the room. comprehensive purification degree of air; a carbon dioxide sensor unit for detecting the concentration of carbon dioxide in the indoor air; an air purification unit equipped with a blower fan and a filter member; and a control unit based on the comprehensive purification degree sensor The operation of the air purification unit is controlled based on the detection results of the detector unit and the carbon dioxide sensor unit. The control unit can control and adjust the air volume of the air cleaning unit according to the change of the carbon dioxide concentration detected by the carbon dioxide sensor unit.

If it is detected that the carbon dioxide concentration detected by the carbon dioxide sensor unit is changing toward a lower direction, the control unit may control to increase the air volume of the air cleaning unit.

The control unit calculates the carbon dioxide concentration using the carbon dioxide detection information detected by the carbon dioxide sensor unit every predetermined unit time, and if the calculated carbon dioxide concentration continues to decrease during a predetermined time period, the control unit may Control to increase the air volume of the air purification unit.

When the increase in dust concentration detected by the integrated cleanliness sensor section exceeds In the case of a preset critical amount, the control unit may control to increase the air volume of the air purification unit.

The control unit may determine an increase degree of the air volume of the air cleaning unit by comparing the first carbon dioxide concentration at the first time point with the second carbon dioxide concentration at the second time point.

The air cleaner may further include a circulator equipped with a circulation fan. The control unit may control to increase the air volume of the circulator when it is detected that the carbon dioxide concentration detected by the carbon dioxide sensor unit is changing toward a decrease.

The control unit may assign a grade to the indoor air based on the state of the indoor air detected by the overall cleanliness sensor unit, and control the air cleaning unit to The first air volume set according to the level operates.

If the control unit detects that the carbon dioxide concentration detected by the carbon dioxide sensor If the direction changes, the air purification unit can be controlled to operate at a second air volume greater than the first air volume.

The control unit may set an increase amount of the second air volume to correspond to a decrease amount of the carbon dioxide concentration.

When the carbon dioxide concentration detected by the carbon dioxide sensor unit meets the ventilation standard, the control unit may control to provide a ventilation request to the user.

The control unit compares a first carbon dioxide concentration at a first time point with a second carbon dioxide concentration at a second time point, and when the second carbon dioxide concentration decreases by a predetermined amount or more from the first carbon dioxide concentration, It may be controlled to stop providing said ventilation requests.

The air purifier may further include a display unit for displaying at least one of the comprehensive purification degree of indoor air, the working status of the air cleaning unit, and the working status of the circulator. The display unit includes a ventilation request icon that is displayed by the control unit when the first carbon dioxide concentration detected by the carbon dioxide sensor unit at the first time point meets the ventilation standard. start up.

According to an embodiment of the present invention, the air purifier is located indoors and adjusts the air purification by detecting the air in the room. It may include: a comprehensive purification degree sensor part, which is used to detect the comprehensive purification degree of the indoor air; a detector unit for detecting the concentration of carbon dioxide in the indoor air; an air purification unit equipped with a blower fan and a filter member; and a control unit based on The integrated cleanliness sensor unit and the detection results of the carbon dioxide sensor unit control the operation of the air purification unit. When the carbon dioxide concentration detected by the carbon dioxide sensor unit meets the ventilation standard, the control unit may control to provide a ventilation request to the user.

The air purifier may further include a display unit for displaying at least one of the comprehensive purification degree of indoor air, the working status of the air cleaning unit, and the working status of the circulator. The display unit includes a ventilation request icon that can be activated by the control unit when the carbon dioxide concentration detected by the carbon dioxide sensor unit corresponds to the ventilation standard.

The air cleaner may further include a communication unit that can be connected to the user terminal by wireless communication. The control unit may control the communication unit to transmit a message for the ventilation request to the user terminal when the carbon dioxide concentration detected by the carbon dioxide sensor unit meets a ventilation standard.

The control method of an air cleaner according to an embodiment of the present invention is a method for controlling an air cleaner that is located indoors and adjusts air purification by detecting the air in the room, which may include: comprehensive purification for detecting indoor air degree; the step of detecting the concentration of carbon dioxide in the indoor air; the step of controlling the action of the air purification unit according to the detected comprehensive purification degree; and adjusting the air purification unit according to the change of the carbon dioxide concentration The steps of the air volume.

The step of controlling the operation of the air cleaning unit may include: according to the state of the indoor air detected by the comprehensive cleanliness sensor unit, assigning a grade to the indoor air; A step of controlling the air cleaning unit to operate at a first air volume set according to the level of the indoor air.

The step of controlling to adjust the air volume of the air purification unit may include: a step of detecting the change amount of the carbon dioxide concentration; Steps to set the first air volume and set it as the second air volume.

The step of controlling to adjust the air volume of the air cleaning part may include: a step for detecting an increase in the dust concentration detected by the integrated cleanliness sensor part; and, if the increase in the dust concentration exceeds a preset The step of increasing the first air volume and setting it as the second air volume.

The step of controlling to adjust the air volume of the air purification unit may include the step of setting an increase amount of the second air volume corresponding to a decrease amount of the carbon dioxide.

The control method of the air purifier may further include a step of providing a ventilation request to the user when the carbon dioxide concentration detected by the carbon dioxide sensor part meets a preset ventilation standard.

As mentioned above, according to the air purifier and its control method of the present invention, it is judged whether to ventilate or not according to the change amount of carbon dioxide concentration, and the air volume of the air purifying part is adjusted according to the judging result, thereby, when the user executes ventilating Actively strengthen the air purification in the case of air pollution, thereby having the effect of providing a more active and intelligent air purification function.

In addition, by detecting carbon dioxide, when a predetermined amount or more of carbon dioxide is detected indoors, the user is guided to ventilate, thereby providing an indoor management function for carbon dioxide.

In addition, there is an effect that ventilation information can be provided to the user through a variety of user interfaces by providing a notification about ventilation guidance to the user terminal through display or wireless communication.

10: Air purifier

100: The first air purification module

110: First Shell

115: The first suction part

120: first filter member

130: the first fan casing

140: The first air supply fan

145: The first air supply fan motor

200: The second air purification module

210: second shell

215: Second suction part

220: second filter member

230: second fan housing

240: Second air supply fan

245: Second air supply fan motor

300:Circulator

310: the third fan housing

320: spit out part

325: spit grille

330: circulation fan

335: Circulation fan motor

340: Position conversion department

350:Rotation

400: display part

410: display panel

430: fine dust concentration

440: Breathing request icon

500: input part

520: Bedtime reservation button

530: Operation mode button

540: Air supply fan control button

550: Circulation fan control button

560: Power button

600:Comprehensive cleanliness sensor department

610: Dust sensor

620: Odor sensor

700: Carbon dioxide sensor department

800: Department of Communications

900: control department

910: Comprehensive purification degree setting department

920: ventilation setting department

930: Air volume control department

S710~S750: Steps

S810~S840: Steps

S910~S940: Steps

S1010~S1030: Steps

S1110~S1140: steps

S1210~S1230: Steps

FIG. 1 is a diagram showing an air cleaner according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of the air cleaner according to the embodiment of the present invention.

Fig. 3 is a block diagram illustrating the configuration of the air cleaner according to the embodiment of the present invention.

Fig. 4 is a diagram showing an example of a display unit and an input unit in the air cleaner according to the embodiment of the present invention.

FIG. 5 is a block diagram illustrating an embodiment of the integrated cleanliness sensor unit shown in FIG. 3 .

FIG. 6 is a block diagram illustrating an embodiment of the control unit shown in FIG. 3 .

Fig. 7 is a diagram illustrating an example of a method of controlling an air cleaner according to an embodiment of the present invention.

Fig. 8 is a diagram illustrating another example of the control method of the air cleaner according to the embodiment of the present invention.

FIG. 9 is a diagram illustrating an example of a procedure for detecting carbon dioxide in the control method of the air cleaner.

Fig. 10 is a diagram illustrating an example of a procedure for notifying ventilation guidance in the control method of the air cleaner.

FIG. 11 is a diagram illustrating an example of a procedure for judging whether or not to perform ventilation in the control method of the air cleaner.

Fig. 12 is a diagram illustrating another example of a procedure for determining whether or not to perform ventilation in the control method of the air cleaner.

The advantages and features of the present invention and methods for achieving them can be clearly understood from the embodiments described with reference to the accompanying drawings. However, this invention may be embodied in various different forms and should not be construed as limited to only the embodiments set forth herein. Rather, these embodiments are provided as examples so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art to which this invention pertains. The present invention shall be defined solely in accordance with the scope of the appended claims.

In the following description, the foregoing objects, features, and advantages will be described in detail with reference to the accompanying drawings, so that those skilled in the art to which the present invention pertains can easily implement the technical idea of the present invention.

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

While the invention is susceptible to various changes and embodiments, particular embodiments will be illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the present invention to specific implementation forms, but should be construed as including all changes, equivalents or replacements falling within the spirit and technical scope of the present invention.

In describing the present invention, terms such as first and second may be used to describe various constituent elements, but the constituent elements may not be limited by the terms. These terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first constituent element may be named a second constituent element, and similarly, a second constituent element may also be named a first constituent element without departing from the scope of claims of the present invention.

The term "and/or" may include a combination of multiple related items or any one item among multiple related items.

When it is mentioned that a certain constituent element is "joined" or "connected" to another constituent element, it is understood that it may be directly joined or connected with the above-mentioned another constituent element, but other constituent elements may also exist therebetween. Conversely, when it is mentioned that a certain constituent element is "directly coupled" or "directly connected" to another constituent element, it can be understood that there is no other constituent element therebetween.

The terms used in the present application are for describing specific embodiments only, and are not intended to limit the present invention. In addition, singular expressions used in this specification may be used unless the context clearly indicates otherwise. To include plural expressions.

In this application, terms such as "comprising" or "having" are intended to indicate the presence of features, quantities, steps, actions, constituent elements, components or their combinations described in the specification. It should be understood that the possible existence of Or the possibility of adding one or more other features, quantities, steps, actions, constituent elements, components or combinations thereof.

Unless otherwise defined, terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries can be interpreted as having meanings consistent with the meanings in the context of the related art, and cannot be interpreted as ideal or formal meanings unless otherwise clearly defined in the present application.

In addition, the following embodiments are provided for more complete description to those skilled in the art, and the shapes and sizes of elements in the drawings may be exaggerated for clearer description.

1 is a diagram showing an air cleaner according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the air cleaner according to an embodiment of the present invention, and FIG. 3 is a diagram showing the configuration of the air cleaner according to an embodiment of the present invention.

Referring to Fig. 1 to Fig. 3, the air purifier 10 of the embodiment of the present invention comprises: an air purifier, which is used to generate air flow; .

Hereinafter, although the air purification unit includes the first air purification module 100 and the second air purification module 200 for description, it is not limited thereto.

The first air purification module 100 and the second air purification module 200 may be arranged in a vertical direction.

For example, the first air purification module 100 can be placed on the bottom surface, and the second air purification module 200 can be arranged on the upper side of the first air purification module 100 . In this case, the first air cleaning module 100 generates a first air flow for forming a flow for sucking indoor air present at the lower side of the air cleaner 10 . The second air cleaning module 200 generates a second air flow for forming a flow sucking indoor air present on the upper side of the air cleaner 10 .

In addition, the air cleaner 10 may include a blower fan that discharges the air that has flowed in upward.

The blowing fans may include a first blowing fan 140 and a second blowing fan 240 . The first air blowing fan 140 can be arranged on the first air purification module 100, and the second air blowing fan 240 can be arranged on the second air purifying module 100. Two air purification modules 200.

The air cleaner 10 includes a housing for forming an appearance.

The case may include: a first case 110 for forming the appearance of the first air purification module 100 ; and a second case 210 for forming the appearance of the second air purification module 200 .

The first case 110 is cylindrical, and the first case 110 may be formed such that an upper portion has a smaller diameter than a lower portion. That is, the first housing 110 may be in the shape of a cone with the end cut off.

The second case 210 may also be formed in a shape similar to that of the first case 110 . For the second housing 210 the description for the first housing 110 applies.

A suction portion for sucking in air is formed on the casing.

For example, a first suction portion 115 for taking in air is formed on the first housing 110 . The first suction part 115 may include a plurality of through holes formed to penetrate at least a portion of the first housing 110 . A plurality of through-holes may be uniformly formed in a circumferential direction along the outer peripheral surface of the first housing 110 so that air can also be sucked in any direction with the first housing 110 as a reference. That is, air can be sucked in directions of 360 degrees based on the center line in the vertical direction passing through the inner center of the first casing 110 . The air sucked through the first suction portion 115 can flow radially from the outer peripheral surface of the first housing 110 .

A second suction portion 215 for sucking air may be formed on the second housing 210 . The detailed description refers to the description about the first suction part 115 .

The first air purification module 100 includes a first filter component 120 . The first filter member 120 may have filter cotton for filtering air on its outer side. Air passing through the first suction part 115 including a plurality of through holes may pass through the filter cotton of the first filter member 120 and flow into the inside thereof to be filtered. That is, air may flow in through the filter cotton of the first filter member 120, and impurities such as fine dust in the air are filtered out during passing through the first filter member 120 as described above.

The first filter member 120 may be detachably installed.

The first filter member 120 can be configured in various ways, such as chemical filters and physical filters. For example, it can include deodorizing filters, antibacterial filters, high efficiency particulate air (High Efficiency Particulate Air, HEPA) filters, ultra-low penetration air (Ultra-Low Penetration Air, ULPA) filters, activated carbon filters, electric At least one of a dust collector and a visible light catalyst filter.

The first air cleaning module 100 may include a first fan housing (housing) 130, The first fan case 130 is disposed on the outlet side of the first filter member 120 . A space for accommodating the first blower fan 140 is formed in the first fan case 130 .

The first air blowing fan 140 may include a centrifugal fan which inflows air in an axial direction and discharges air toward an upper side in a radial direction. The first blower fan 140 may be coupled with a first blower fan motor 145 at an upper side thereof, thereby applying a rotational force.

The second air purification module 200 may further include a second filter member 220 , a second fan casing 230 , and a second blower fan 240 .

The second filter member 220 may have a shape whose upper portion is opened. Air may pass through the filter cotton disposed outside the second filter member 220 and flow into the inside of the second filter member 220 , and may be discharged through the upper portion of the second filter member 220 which is opened. The configuration of the second filter member 220 can also be referred to the first filter member 120 .

The second filter member 220 may be detachably installed on the second air cleaning module 200 . During passing through the second filter member 220, impurities such as fine dust in the air may be filtered out.

The second air purification module 200 may further include a second fan case 230 disposed on an outlet side of the second filter member 220 . A space for accommodating the second blower fan 240 is formed in the second fan case 230 . The second air blowing fan 240 includes a centrifugal fan that inflows air in the axial direction and discharges the air toward the upper side in the radial direction. The second blower fan 240 may be coupled with a second blower fan motor 245 on its upper side, thereby applying a rotational force.

The circulator 300 may be disposed on the upper side of the second air purification module 200 . The air flow path of the second air purification module 200 may communicate with the air flow path of the circulator 300 . That is, the air passing through the second air cleaning module 200 will pass through the air flow path of the circulator 300 and may be discharged to the outside through the discharge part 320 . The discharge part 320 may be formed at the upper end of the circulator 300 .

The circulator 300 may include a third fan case 310 for housing a circulation fan 330 . As an example, the third fan casing 310 may have a substantially ring shape.

The circulation fan 330 may include an axial-flow fan. For example, the circulation fan 330 may operate to discharge air flowing in the axial direction toward the axial direction. That is, the air flowing upward from the second blower fan 240 through the circulation fan 330 may be discharged from the circulation fan 330 and may be discharged to the outside through the discharge part 320 located above the circulation fan 330 . The circulation fan 330 is coupled with a circulation fan motor 335 at its lower side, thereby applying a rotational force.

The circulator 300 may be installed in a movable manner. Specifically, the circulator 300 can be placed in a lying state (first position) or an obliquely standing state (second position) by including the position switching unit 340 . For example, the position conversion part 340 may include a motor and a gear (not shown), so that a part of the ring-shaped third fan case 310 may be lifted upward by the rotation of the gear.

The circulator 300 is rotatable in the left-right direction by including the rotating unit 350 . Here, rotating in the "left-right direction" may refer to rotating in a clockwise or counterclockwise direction with the up-down direction as a reference. For example, the rotation unit 350 may rotate the third fan case 310 in the left-right direction by including a rotation shaft and a motor.

A discharge grill 325 having a discharge portion 320 for discharging air passing through the circulation fan 330 may be provided on the upper side of the third fan case 310 . Moreover, the display part 400 for displaying the operation information of the air cleaner 10 may be provided in the center part of the discharge grille 325. As shown in FIG. At this time, the display unit 400 can move together with the circulator 300 .

On the other hand, an example of the display unit 400 and the input unit 500 of the air cleaner 10 according to the embodiment of the present invention is shown in FIG. 4 .

The display unit 400 can be installed in the center of the outlet grille 325 of the circulator 300 , so as to display the air purification degree of the indoor air, the working status of the air cleaning modules 100 and 200 , and the working status of the circulator 300 . The display unit 400 includes a display panel 410 and a ventilation request icon (icon) 440 .

In the display unit 400, the display panel 410 can display: information about the air purification degree of the indoor air including the concentration of fine dust 430 or the presence or absence of odor; The working state of the circulation fan 330, etc. In addition, in the case of a double-layer structure and the first air purification module 100 and the second air purification module 200 as in this embodiment, it can be displayed whether one of the air purification modules 100, 200 is operating or both are operating. All in operation. In addition, it may be displayed whether the circulator 300 is lying down (first position) or standing obliquely (second position), and whether it is being rotated in the left-right direction.

In addition, it is also possible to display on the display panel 410 whether or not the bedtime reservation button 520 has been set. In addition, in the present invention, a ventilation request icon 440 may be arranged on the display panel 410 .

When the carbon dioxide concentration detected by the comprehensive purification degree sensor unit 600 meets the preset ventilation standard, the ventilation request icon 440 is activated by the control unit 900, thereby notifying the user that there is too much carbon dioxide in the indoor air. Ventilation is required.

The input unit 500 can be arranged in the display panel 410, and can be configured to input An operation command for the air purification modules 100, 200, the circulator 300, and the display unit 400 to perform operations. At this time, the work command includes an operation mode command that can enter the operation mode.

In the present invention, the input unit 500 may include a bedtime reservation button 520 , an operation mode button 530 , a blower fan control button 540 , a circulation fan control button 550 , and a power button 560 .

The user can turn off or turn on the power of the air purifier 10 by pressing the power button 560 .

When the user presses the bedtime reservation button 520, the bedtime reservation can be realized, and the bedtime reservation turns off the power of the air purifier 10 after the input predetermined time has elapsed.

A user may select an operating mode by pressing the operating mode button 530 . That is, if the operation mode button 530 is pressed, the first air blowing fan 140, the second air blowing fan 240, and the circulation fan 330 can be rotated at a preset rotation speed (rpm), and the movement and left-right direction of the circulator 300 can be controlled. Rotation on the control. For example, the user may press the operation mode button 530 to select an automatic mode, a cycle purification mode, a dual (dual) purification mode or a single (single) purification mode, and the like.

The user can directly control the air volume of the first air supply fan 140 or the second air supply fan 240 by pressing the air supply fan control button 540 , and can directly control the air volume of the circulation fan 330 by pressing the circulation fan control button 550 .

On the other hand, in this embodiment, the input unit 500 is configured in the form of a button, but it is not limited thereto, and may also include a variety of input methods in which the user can input work commands by touching or pressing, additionally , commands can also be implemented by voice, and work commands can also be input wirelessly through a remote control, etc.

The comprehensive cleanliness sensor unit 600 can detect the comprehensive cleanliness of indoor air. The comprehensive purification degree sensor unit 600 can detect dust detection information (for example, fine dust concentration, ultrafine dust concentration, etc.) used in degrees.

5 is a block diagram illustrating an embodiment of the integrated cleanliness sensor section shown in FIG. . The dust sensor 610 detects dust in indoor air, for example, detects fine dust concentration and ultrafine dust concentration, and uses the detection result to generate dust detection information, and provides it to the control unit 900 . The odor sensor 620 is used to detect the odor of the indoor air, for example, detect the amount of gas, and use the detection result to generate odor information and provide it to the control unit 900 .

The integrated cleanliness sensor part 600 can be disposed in the first air purification module 100 and/or the second air purification module 200 .

The carbon dioxide sensor unit 700 can detect carbon dioxide in indoor air. For example, the carbon dioxide sensor unit 700 can detect the concentration of carbon dioxide in the indoor air, use the detection result to generate carbon dioxide detection information, and provide it to the control unit 900 .

As an example, the carbon dioxide detection information may be a voltage signal. The carbon dioxide sensor part 700 may detect carbon dioxide, and provide a voltage signal having a voltage level corresponding to the detected carbon dioxide concentration to the control part 900 .

The carbon dioxide sensor unit 700 can be disposed on the first air purification module 100 and/or the second air purification module 200 .

The control unit 900 may calculate the concentration of carbon dioxide in the indoor air by using the voltage signal provided by the carbon dioxide sensor unit 700 .

The control unit 900 can control the air volume of the first blower fan 140 , the second blower fan 240 , and the circulation fan 330 according to the operation command input from the input unit 500 , and can control the movement and left-right rotation of the circulator 300 .

The control part 900 can receive the work command from the input part 500, and receive the state information of the indoor air from the comprehensive purification degree sensor part 600, and can transmit the control command to the first blower fan motor 145, the second blower fan motor 245, Circulation fan motor 335 , position conversion unit 340 and rotation unit 350 .

The control unit 900 may control the operation of the air purification unit based on the detection results of the comprehensive purification degree sensor unit 600 and the carbon dioxide sensor unit 700 .

The control unit 900 is set with an overall purification degree level based on the state of the indoor air (fine dust concentration, ultrafine dust concentration, amount of gas, etc.). For example, the control unit 900 may use the dust detection information and the odor detection information measured by the comprehensive cleanliness sensor unit 600 to evaluate the air quality in four grades of "good", "normal", "poor" and "extremely poor". Indoor air is given a rating.

The rotation speed (rpm) of the first blowing fan 140, the second blowing fan 240, and the circulation fan 330 can be preset according to each level in the control part 900, and the movement and left-right direction of the circulator 300 can be set according to each level. rotation or not. The control unit 900 may assign an air volume level to each of the first ventilation fan 140 , the second ventilation fan 240 , and the circulation fan 330 . For example, air volume levels such as "weak wind", "medium wind", "strong wind" and "strong wind" can be given according to the order of increasing air volume, And the rotational speeds (rpm) of the first blowing fan 140 , the second blowing fan 240 and the circulation fan 330 can be set for each level.

When the automatic mode is input from the input unit 500, the control unit 900 can make the first air purification module 100, the second air purification module 100 and the second air purification system according to the level of the comprehensive purification degree of the indoor air detected by the comprehensive purification degree sensor unit 600. The module 200 and the circulator 300 operate. That is, when the automatic mode is activated, the control unit 900 may set the level of the overall purification degree based on the dust detection information and the gas detection information detected by the overall purification degree sensor unit 600 . The control unit 900 can operate the first air blowing fan 140 , the second air blowing fan 240 , and the circulation fan 330 at a preset air volume level corresponding to the level of the overall purification degree. For example, when the level of the comprehensive degree of purification is "good", the first blower fan 140, the second blower fan 240, and the circulation fan 330 can be operated at the level of "weak wind", and if the level of the comprehensive degree of purification are "common", "poor" and "extremely poor" respectively, then the first air supply fan 140, the second air supply fan 240 and the circulation fan 330 can be set at the level of "stroke", "strong wind" and "strong wind" respectively. ” level to perform actions.

The control unit 900 can control the movement and the rotation in the left and right directions of the circulator 300 corresponding to the level of the overall purification degree. For example, when the comprehensive purification level is "good" or "common", the control unit 900 can make the circulator 300 lie in a lying state (first position), and will not rotate (fixed) toward the left and right directions; When the level of indoor air is "poor", the control unit 900 can make the circulator 300 stand upright (second position) obliquely, and will not rotate toward the left and right; In the case of "very bad", the control unit 900 can make the circulator 300 stand upright (second position) obliquely, and rotate it in the left and right direction.

On the other hand, in the case of starting an operation mode other than the automatic mode, the control unit 900 may make the first blower fan 140, the second blower fan 240, and the circulation fan 330 rotate at a preset rotation speed (rpm) according to each operation mode. The rotation is performed, and the movement of the circulator 300 and the rotation in the left and right directions are controlled. At this time, the user can directly control the air volume level of the first blowing fan 140, the second blowing fan 240, or the circulation fan 330 through the input unit 500, and can directly control the movement and rotation of the circulator 300 in the left and right directions. .

The control unit 900 may control to adjust the air volume of the air purification unit according to the change of the carbon dioxide concentration detected by the carbon dioxide sensor unit 700 .

When the carbon dioxide concentration detected by the carbon dioxide sensor unit 700 meets the ventilation standard, the control unit 900 may control to provide a ventilation request to the user.

In one embodiment, the control unit 900 can use the carbon dioxide detection information detected by the carbon dioxide sensor unit 700 to calculate the carbon dioxide concentration, and set the carbon dioxide state as “good”, “normal”, or “normal” according to the calculated carbon dioxide concentration. Four grades of "poor" and "very poor". The control unit 900 may set the "extremely poor" level as the ventilation standard, and if the carbon dioxide state is at the "extremely poor" level, it may notify the user for ventilation guidance.

As an example, the control unit 900 may guide the user to perform ventilation by activating the ventilation request icon 440 on the display unit 400 . At the same time, the control unit 900 can control to provide a sound notification to the user, such as a beep sound or a voice notification.

As an example, the control unit 900 may control to send a message about a ventilation request to the user terminal through the communication unit 800 .

After being guided to perform ventilation, when the carbon dioxide concentration decreases, the control unit 900 may determine that ventilation has been performed, and stop notification of the ventilation guidance.

For example, the control unit 900 may compare the first carbon dioxide concentration calculated at the first time point with the second carbon dioxide concentration calculated at the second time point, and when the second carbon dioxide concentration is lower than the first carbon dioxide concentration When the amount exceeds the predetermined amount, it can be controlled to stop providing the ventilation request.

If the control unit 900 detects that the carbon dioxide concentration detected by the carbon dioxide sensor unit 700 changes toward a decrease direction, it may control to increase the air volume of the air purification unit.

This is because carbon dioxide has a characteristic that its content does not decrease or increase due to the air cleaner, therefore, the decrease in the concentration (content) of carbon dioxide in the indoor air is caused by external factors other than the air cleaner, that is, the concentration of carbon dioxide inflow. Caused by the condition of the outside air being lower than the room air. Therefore, if it is detected that the carbon dioxide concentration detected by the carbon dioxide sensor unit 700 changes in the direction of decreasing, the control unit 900 can determine that ventilation is being performed.

On the other hand, the case where ventilation is performed is the case where the outside air has flowed in instead of the current indoor air, and therefore, the inflowed outside air is different from the indoor air, and the inflowed outside air contains pollutants such as dust and odors. . In particular, when the air cleaner is operating or has already operated indoors, the pollution degree of the outdoor air is higher than that of the indoor air. Therefore, when it is determined that ventilation is performed, the control unit 900 can strongly increase the intensity of air cleaning.

As a result, the decrease in the concentration (content) of carbon dioxide in the air is caused by the inflow and ventilation of outside air. Therefore, when the carbon dioxide detected by the carbon dioxide sensor unit 700 is detected, When the carbonization concentration changes toward a decreasing direction, the control unit 900 may control to increase the air volume of the air purification unit.

In one embodiment, the control unit 900 may calculate the concentration of carbon dioxide by using the carbon dioxide detection information detected by the carbon dioxide sensor unit 700 every predetermined unit time. When the calculated carbon dioxide concentration continues to decrease during a predetermined time, the control part 900 determines that ventilation is performed, and may control to increase the intensity of air cleaning.

For example, the carbon dioxide sensor unit 700 can generate 256 carbon dioxide detection information within 2 seconds and provide it to the control unit 900, and the control unit 900 can use the 256 carbon dioxide detection information detected within 2 seconds to calculate the concentration of carbon dioxide . When the 10 carbon dioxide concentrations calculated within 20 seconds show a continuous downward trend, the control unit 900 may determine that ventilation is performed. If, when the decreasing carbon dioxide concentration increases, the control unit 900 may judge again whether the change in the carbon dioxide concentration is decreasing or not, using the time point of the increase as a reference.

In the above, an example of judging whether to ventilate or not by using an increase in the concentration of carbon dioxide has been described.

On the other hand, in one embodiment, the control unit 900 can also judge whether to ventilate according to the increase of the dust concentration. For example, the control unit 900 may determine that ventilation is performed when the increase in the dust concentration detected by the comprehensive cleanliness sensor unit 600 exceeds a preset threshold. This is because the dust concentration of the outside air is higher than that of the indoor air on which air cleaning is performed, and therefore, when ventilation is performed, the dust concentration temporarily rises. When the dust concentration increases and exceeds a critical amount, the control unit 900 may control to increase the air volume of the air purification unit.

In one embodiment, the dust concentration is detected by the integrated cleanliness sensor unit 600 at intervals of each specified time, and if the increase in the dust concentration calculated at each time interval exceeds a critical amount, the control unit The 900 can determine that ventilation is performed, and can control to increase the air volume of the air purification unit.

If it is determined that ventilation is performed, the control unit 900 may control to increase the air volume of the air purification unit. Alternatively, if it is determined that ventilation is performed, the control unit 900 may control to increase the air volume of the circulator.

In one embodiment, if it is determined that ventilation is performed, the control unit 900 may control the air purification unit so that the air purification unit increases the air volume in operation by one level according to the comprehensive purification degree.

For example, when the overall cleanliness level is "good", the control unit 900 may use The air purification unit operates at the level of “weak wind”; when the comprehensive purification level is “normal”, the control unit 900 can make the air purification unit operate at the level of “stroke”; when the comprehensive purification level is “poor” In the case of , the control unit 900 can make the air purification unit operate at the level of “strong wind”; run. Here, when it is determined that ventilation is being performed, the control unit 900 may increase the level of "weak wind" to the level of "moderate wind" if the overall purification level is "good"; ", the control unit 900 can increase the level of "middle wind" to the level of "strong wind"; if the comprehensive purification level is "poor", the control unit 900 can increase the level of "strong wind" to "strong wind" level; if the comprehensive purification level is "extremely poor", then the control unit 900 can maintain the level of "strong wind", or increase it to a level stronger than the level of "strong wind", so that the air purification unit can operate.

In one embodiment, the control unit 900 can set the increase amount of the air volume according to the decrease amount of carbon dioxide. That is, the control unit 900 may determine the increase degree of the air volume of the air purifier by comparing the carbon dioxide concentration calculated at the first time point with the second carbon dioxide concentration calculated at the second time point.

For example, the control unit 900 may set the carbon dioxide state to four levels of "good", "normal", "poor", and "very poor" based on the calculated concentration of carbon dioxide. When the state of carbon dioxide changes by one level, for example, from "extremely poor" to "poor", the control unit 900 may control to increase the air volume by one level. When the state of carbon dioxide changes by two levels, for example, from "extremely poor" to "normal", the control unit 900 may control to increase the air volume by two levels. Since the increase in the concentration of carbon dioxide is equivalent to the increase in the inflow of outside air, this is to perform the air cleaning function more powerfully.

FIG. 6 is a block diagram illustrating an embodiment of the control unit shown in FIG. 3 . Referring to FIG. 6 , an embodiment of the control unit 900 will be described.

The control unit 900 may include a comprehensive purification degree setting unit 910 , a ventilation setting unit 920 and an air volume control unit 930 .

The comprehensive cleanliness setting unit 910 may use the dust detection information and odor detection information detected by the comprehensive cleanliness sensor unit 600 to set the comprehensive cleanliness of indoor air.

The dust detection information may include fine dust concentration and ultrafine dust concentration, and the comprehensive purification degree setting unit 910 may use the dust detection information to set the comprehensive purification degree level. For example, the comprehensive cleanliness degree setting unit 910 can assign ^a "good" grade when the concentration of fine dust is between 0 ^μg /m ³ and 30 μg/m ³ ; Under normal circumstances, the level of "normal" can be assigned; in the case of 81μg/ ^m3 or more and 150μg/ ^m3 or less, the grade of "poor" can be assigned; in the case of 151μg/ ^m3 or more, "very poor "; and, in the case of ultra-fine dust concentration of 0 μg/m ³ or more and 15 μg/m ³ or less, the grade of "good" can be given; in the case of 16 μg/m ³ or more and 35 μg/m ³ or less , can be given the grade of "common"; in the case of 36 μg/ ^m3 or more and 75 μg/ ^m3 or less, the grade of "poor" can be given; in the case of 76 μg/m3 ^or more, it can be given the grade of "very poor" grade.

The comprehensive cleanliness setting unit 910 may set the comprehensive cleanliness level based on the dust detection information, and then use the odor detection information to re-evaluate the comprehensive cleanliness level. That is, when an odor of more than a predetermined amount is detected, the overall cleanliness level can be raised based on the dust detection information.

The comprehensive purification degree setting unit 910 can provide the set comprehensive purification degree level to the ventilation setting unit 920 and the air volume control unit 930 .

When the carbon dioxide concentration detected by the carbon dioxide sensor unit 700 meets the ventilation standard, the ventilation setting unit 920 may control to provide a ventilation request to the user.

In one embodiment, the ventilation setting unit 920 can use the carbon dioxide detection information detected by the carbon dioxide sensor unit 700 to calculate the carbon dioxide concentration, and set the carbon dioxide state as “good” or “normal” according to the calculated carbon dioxide concentration. ", "poor" and "extremely poor". The ventilation setting unit 920 may set the "extremely poor" level as the ventilation standard, and if the carbon dioxide state is at the "extremely poor" level, it may notify the user for ventilation guidance.

The ventilation setting unit 920 may provide the level of the carbon dioxide concentration to the air volume control unit 930 .

As an example, the ventilation setting unit 920 can guide the user to perform ventilation by activating the ventilation request icon 440 on the display unit 400 . At the same time, the ventilation setting unit 920 can control to provide a sound notification to the user, such as a beep sound or a voice notification.

As an example, the ventilation setting unit 920 may control to send a message about a ventilation request to the user terminal through the communication unit 800 .

The air volume control unit 930 can control the air volume of the air purification unit.

The air volume control unit 930 may control the air volume of the air purification unit based on the comprehensive purification degree level provided by the comprehensive purification degree setting unit 910 .

For example, in the case where the overall purification level is "good", the air volume control unit 930 may To make the air purification unit operate at the level of “weak wind”; when the comprehensive purification level is “common”, the air volume control unit 930 can make the air purification unit operate at the level of “middle wind”; In the case of "poor", the air volume control part 930 can make the air purification part operate at the level of "strong wind"; "strong wind" level for operation.

The ventilation setting unit 920 can determine whether the ventilation is being performed based on the change of the carbon dioxide concentration, and if it is determined that the ventilation is being performed, it can send a request to increase the air volume to the air volume control unit 930 .

When it is detected that the carbon dioxide concentration detected by the carbon dioxide sensor unit 700 changes toward a decrease, the ventilation setting unit 920 may request the air volume control unit 930 to increase the air volume of the air purification unit.

In one embodiment, the ventilation setting unit 920 can calculate the carbon dioxide concentration by using the carbon dioxide detection information detected by the carbon dioxide sensor unit 700 every predetermined unit time. When the carbon dioxide concentration calculated by the ventilation setting unit 920 continues to decrease for a predetermined period of time, it can be determined that ventilation is performed.

The ventilation setting unit 920 can also judge whether to ventilate according to the increase of the dust concentration. The ventilation setting unit 920 may determine that ventilation is performed when the increase in the dust concentration detected by the comprehensive cleanliness sensor unit 600 exceeds a preset threshold.

In one embodiment, the dust concentration is detected by the integrated cleanliness sensor unit 600 at intervals of each specified time, and if the increase in the dust concentration calculated at each interval of time exceeds a critical amount, then The ventilation setting unit 920 may determine that ventilation is performed, and may increase the air volume of the air cleaning unit.

As an example, the critical amount for judging whether to ventilate or not may be a preset value.

As another example, the ventilation setting unit 920 may calculate the critical amount based on the dust concentration detected during a plurality of time intervals. For example, the ventilation setting unit 920 may calculate an increase based on the dust concentration detected at each time interval, and set an average value of the increase during a predetermined time (for example, 12 hours, etc.) as the critical amount. Here, if necessary, cases where the amount of increase greatly exceeds the average value are judged as ventilation, and these cases may not be reflected in the calculation of the average value.

In the above-mentioned example, the average value was used as a reference, but various forms such as an intermediate value or a deviation can be applied.

In one embodiment, the air volume control unit 930 can set an increase in air volume according to a decrease in carbon dioxide.

For example, when the state of carbon dioxide increases by one level, for example, when changing from "extremely poor" to "poor", the air volume control unit 930 may control to increase the air volume by one level. When the state of carbon dioxide changes by two levels, for example, from "very poor" to "normal", the air volume control unit 930 may control to increase the air volume by two levels.

In one embodiment, if it is determined that ventilation is performed, the air volume control unit 930 may control the air purification unit so that the air purification unit increases the operating air volume by one level according to the comprehensive purification degree.

For example, when it is determined that ventilation is being performed, if the overall purification level is "good", the air volume control unit 930 may increase the level of "weak wind" to the level of "middle wind"; ", the air volume control unit 930 can increase the level of "moderate wind" to the level of "strong wind"; if the comprehensive purification level is "poor", the air volume control unit 930 can increase the level of "strong wind" to "strong If the comprehensive purification level is "extremely poor", then the air volume control part 930 can maintain the "strong wind" level, or increase it to a level stronger than the "strong wind" level, so that the air purification unit run.

Above, referring to FIG. 1 to FIG. 6 , various implementation forms of an air cleaner according to an embodiment of the present invention have been described.

Hereinafter, referring to FIG. 7 to FIG. 11 , a control method of an air cleaner according to an embodiment of the present invention will be described. However, the control method of the air cleaner to be described below is executed in the control unit of the air cleaner described above with reference to FIGS.

Fig. 7 is a diagram illustrating an example of a method of controlling an air cleaner according to an embodiment of the present invention. FIG. 7 is a control method for explaining a case where ventilation occurs while the air cleaning function is operating.

Referring to FIG. 7 , the control unit 900 may detect the comprehensive purification degree of indoor air, and control the operation of the air purification unit according to the detected comprehensive purification degree (step S710 ).

In addition, the control unit 900 may detect carbon dioxide in the indoor air (step S720).

The control unit 900 may provide a notification on ventilation guidance based on the detected level (concentration) of carbon dioxide (step S730).

The control unit 900 can control and adjust the air volume of the air purification unit according to the change of the carbon dioxide concentration. That is, the control unit 900 may determine whether to perform ventilation based on a change in the level (concentration) of carbon dioxide (step S740). If it is determined that ventilation is performed, the control unit 900 may control to increase the intensity of the current air purification (step S750).

In one embodiment, the control unit 900 can assign a level to the indoor air according to the indoor air state detected by the comprehensive purification degree sensor unit 600, and control it to operate with the air volume set according to the level of the indoor air. . Then, when it is detected that the carbon dioxide is changing toward a decreasing direction, the control unit 900 may increase the air volume set according to the level of the indoor air, and set it to a higher air volume. Here, the control unit 900 may set an increase amount of the air volume corresponding to a decrease amount of carbon dioxide.

Fig. 8 is a diagram illustrating another example of the control method of the air cleaner according to the embodiment of the present invention. Fig. 8 is a control method for the case where ventilation occurs while the air cleaning function is in an idle state.

Referring to FIG. 8, the control unit 900 may detect carbon dioxide in indoor air (step S810).

The control unit 900 may provide a notification on ventilation guidance based on the detected level (concentration) of carbon dioxide (step S820).

The control unit 900 can control the air volume of the air purification unit according to the change of the carbon dioxide concentration. That is, the control unit 900 may determine whether to perform ventilation based on a change in the level (concentration) of carbon dioxide (step S830). If it is determined that ventilation is performed, the control unit 900 can detect the comprehensive purification degree of the indoor air, and determine the intensity of air purification according to the detected comprehensive purification degree, and control to further enhance the determined intensity of air purification Air cleaning is performed (step S840).

FIG. 9 is a diagram illustrating an example of a procedure for detecting carbon dioxide in the control method of the air cleaner.

Referring to FIG. 9 , the carbon dioxide sensor part 700 may continuously detect carbon dioxide and provide a voltage signal to the control part 900 corresponding to the detected value. That is, the voltage value of the carbon dioxide sensor is input (step S910).

The control unit 900 may calculate the carbon dioxide concentration by using the carbon dioxide detection information detected by the carbon dioxide sensor unit 700 every predetermined unit time.

If the predetermined unit time has passed (step S920, Yes), the control unit 900 can calculate the average value of the voltage values detected during the unit time (step S930), and can calculate the average voltage value corresponding to the average voltage value. Corresponding carbon dioxide level (concentration), from which the carbon dioxide concentration is calculated (step S940).

Fig. 10 is a diagram illustrating an example of a procedure for notifying ventilation guidance in the control method of the air cleaner.

Referring to FIG. 10 , when the carbon dioxide level (concentration) calculated by the control unit 900 meets the preset critical value (ventilation reference) (step S1010, Yes), the control unit 900 may control to activate the ventilation request icon 440 (step S1020). At the same time, the control unit 900 can also be controlled to provide a sound notification to the user, such as a beep sound or a voice notification.

In addition, the control part 900 may control to send a message about the ventilation request to the user terminal through the communication part 800 (step S1030).

FIG. 11 is a diagram illustrating an example of a procedure for judging whether or not to perform ventilation in the control method of the air cleaner. An embodiment shown in FIG. 11 is an embodiment in which the increase in carbon dioxide is used to determine whether to take a breath.

Referring to FIG. 11 , the control unit 900 may calculate the concentration (level) of carbon dioxide by using the carbon dioxide detection information detected by the carbon dioxide sensor unit 700 every predetermined first unit time (step S1110 ).

If the second unit time longer than the first unit time has elapsed (step S1120, yes), the control unit 900 determines whether the carbon dioxide concentration calculated during the second unit time continues to decrease (step S1130, yes) . If the carbon dioxide concentration continues to decrease during the second unit time, the control unit 900 may determine that ventilation is performed (step S1140 ).

For example, the control unit 900 may calculate the carbon dioxide concentration using 256 pieces of carbon dioxide detection information detected during 2 seconds, that is, the first unit time. If the 10 carbon dioxide concentrations calculated during 20 seconds, that is, the second unit time, show a continuous downward trend, the control unit 900 may determine that ventilation is performed.

If the concentration (level) of carbon dioxide does not continue to decrease during the second unit time (S1130, No), repeat execution from step S1110.

FIG. 12 is a diagram illustrating another example of a procedure for judging whether or not to perform ventilation in the control method of the air cleaner. One embodiment shown in Figure 12 is to use the increasing amount of dust concentration Come to judge the embodiment of ventilation or not.

Referring to FIG. 12 , the control unit 900 may confirm the dust concentration by using the dust detection information detected by the comprehensive cleanliness sensor unit 600 every predetermined unit time (step S1210 ). If the increase of the dust concentration exceeds the threshold (step S1220, Yes), the control unit 900 may determine that ventilation is performed (step S1230). If the increase of the dust concentration is below the critical amount (step S1220, No), repeat execution from step S1110.

Above, the present invention has been described through specific embodiments, but this is for specifically illustrating the present invention, and the present invention is not limited thereto. Obviously, within the scope of the technical thought of the present invention, ordinary people in the technical field to which the present invention belongs Those skilled in the art can make variations or improvements to the present invention.

All simple modifications or changes of the present invention belong to the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended patent scope.

S710~S750: Steps

Claims (22)

An air cleaner is located indoors and adjusts air purification by detecting the air in the room. The air cleaner includes: a comprehensive purification degree sensor part for detecting the comprehensive purification degree of indoor air; a carbon dioxide sensor part for detecting The concentration of carbon dioxide in the indoor air; an air purification unit equipped with a blower fan and a filter member; and a control unit based on the detection results of the comprehensive purification degree sensor unit and the carbon dioxide sensor unit , controlling the action of the air purification unit, wherein the control unit is configured to determine whether ventilation has been performed according to a change in the concentration of carbon dioxide detected by the carbon dioxide sensor unit, and wherein, when it is determined that ventilation has been performed , the control unit increases each air volume level of the air purification unit corresponding to each comprehensive purification degree, so that the air volume level of the air purification unit after ventilation is compared with the air volume level of the air purification unit before ventilation. The air volume level of the purification section is increased. The air purifier according to claim 1, wherein, if the control unit detects that the carbon dioxide concentration detected by the carbon dioxide sensor unit changes in a direction of decreasing, the control unit increases corresponding to each Each air volume level of the air purification unit according to the comprehensive purification degree. The air cleaner according to claim 1, wherein the control unit calculates the carbon dioxide concentration by using the carbon dioxide detection information detected by the carbon dioxide sensor unit every predetermined unit time, and if calculated during the predetermined time If the output carbon dioxide concentration continues to drop, the control unit increases each air volume level of the air purification unit corresponding to each comprehensive purification degree. The air purifier according to claim 1, wherein, when the increase in the dust concentration detected by the comprehensive cleanliness sensor part exceeds a preset threshold, the control part increases the amount corresponding to each Each air volume level of the air purification unit according to the comprehensive purification degree. The air purifier according to claim 1, wherein the control unit determines the corresponding to each comprehensive purification degree by comparing the first carbon dioxide concentration at the first time point with the second carbon dioxide concentration at the second time point. The increase degree of each air volume level of the air purification unit. The air cleaner according to claim 1, wherein the air cleaner further includes a circulator equipped with a circulation fan, and if the control unit detects the carbon dioxide concentration detected by the carbon dioxide sensor unit If it changes in the direction of decreasing, the control unit increases each air volume level of the air purification unit corresponding to each comprehensive purification degree. The air cleaner according to claim 1, wherein the control unit assigns a level to the overall purification degree of the indoor air according to the state of the indoor air detected by the overall purification degree sensor unit, And the air cleaning unit is controlled to operate at the first air volume level set according to the comprehensive purification degree of the indoor air. The air purifier according to claim 7, wherein during the operation of the air purifier at the first air volume level set according to the level of the indoor air, if the control unit detects that the When the carbon dioxide concentration detected by the carbon dioxide sensor unit changes toward a lower direction, the air cleaning unit is controlled to operate at a second air volume level greater than the first air volume level. The air purifier according to claim 8, wherein the control unit sets the increase amount of the second air volume level to correspond to the decrease amount of the carbon dioxide concentration. The air purifier according to claim 1, wherein when the carbon dioxide concentration detected by the carbon dioxide sensor part meets a ventilation standard, the control part controls to provide a ventilation request to the user. . The air purifier according to claim 10, wherein the control unit compares the first carbon dioxide concentration at the first time point with the second carbon dioxide concentration at the second time point, if the second carbon dioxide concentration is the same as the first When the carbon dioxide concentration decreases by more than a predetermined amount, it is controlled to stop providing the ventilation request. The air purifier according to claim 10, wherein the control unit uses the carbon dioxide detection information detected by the carbon dioxide sensor unit to calculate the carbon dioxide concentration, and sets the carbon dioxide state to “ Good", "Fair", "Poor", and "Very Poor", and The ventilation reference corresponds to the "extremely poor" rating. The air cleaner according to claim 1, wherein the air cleaner further includes a display unit for displaying the comprehensive purification degree of the indoor air, the working status of the air purification unit and a At least one of the working states of the circulator, and the display unit includes a ventilation request icon, when the first carbon dioxide concentration detected by the carbon dioxide sensor unit at the first time point meets a ventilation standard , the ventilation request icon is activated by the control unit. An air cleaner is located indoors and adjusts air purification by detecting the air in the room. The air cleaner includes: a comprehensive purification degree sensor part for detecting the comprehensive purification degree of indoor air; a carbon dioxide sensor part for detecting The concentration of carbon dioxide in the indoor air; an air purification unit equipped with a blower fan and a filter member; and a control unit based on the detection results of the comprehensive purification degree sensor unit and the carbon dioxide sensor unit , controlling the operation of the air purification unit, wherein, when the carbon dioxide concentration detected by the carbon dioxide sensor unit meets a ventilation standard, the control unit controls to provide a ventilation request to the user, Wherein, the control part is configured to judge whether ventilation has been performed based on a change in the carbon dioxide concentration detected by the carbon dioxide sensor part, and wherein, when it is judged that ventilation has been performed, the control part increases the corresponding to each Each air volume level of the air purification unit of the comprehensive purification degree, so that the air volume level of the air purification unit after ventilation is increased compared with the air volume level of the air purification unit before ventilation. The air cleaner according to claim 14, wherein the air cleaner further includes a display unit for displaying the comprehensive purification degree of the indoor air, the working status of the air purification unit and a At least one of the operating states of the circulator, and the display unit includes a ventilation request icon, and when the carbon dioxide concentration detected by the carbon dioxide sensor unit meets the ventilation standard, the ventilation A request icon is activated by the control unit. The air purifier according to claim 14, wherein the air purifier further includes a communication part, the communication part can be connected to the user terminal in a wireless communication manner, and the carbon dioxide sensor part When the detected carbon dioxide concentration meets the ventilation standard, the control unit controls the communication unit to transmit a message for the ventilation request to the user terminal. A control method of an air cleaner, the air cleaner is located indoors and adjusts the air purification by detecting the air in the room, the control method of the air cleaner includes: the step of detecting the comprehensive purification degree of the indoor air; detecting the indoor air The steps of the carbon dioxide concentration in the air; judging whether ventilation has been performed according to the change of the carbon dioxide concentration; and the step of controlling the action of an air purification unit according to the detected comprehensive purification degree, wherein, When air is being used, increase each air volume level of the air purification unit corresponding to each comprehensive purification degree, so that the air volume level of the air purification unit after ventilation is compared with that of the air purification unit before ventilation The air volume level increases. The control method of the air cleaner according to claim 17, wherein the step of controlling the action of the air cleaning part according to the detected comprehensive purification degree includes: according to the detected comprehensive purification degree sensor part The step of assigning a level to the overall purification degree of the indoor air by the state of the indoor air; and controlling the air cleaning unit to operate at a first air volume level set according to the overall purification degree of the indoor air. The control method of the air cleaner according to claim 18, wherein, the step of increasing each air volume level of the air purification part corresponding to each comprehensive purification degree includes: a step of detecting the change amount of the carbon dioxide concentration; and if A step of increasing the first air volume level and setting it as the second air volume level when detecting that the carbon dioxide concentration changes toward a decreasing direction. The control method of the air cleaner according to claim 18, wherein the step of increasing each air volume level of the air purification part corresponding to each comprehensive purification degree includes: a step of detecting an increase in the dust concentration detected by the integrated cleanliness sensor unit; and if the increase in the dust concentration exceeds a preset threshold, increasing the first air volume level and setting Steps for the second air volume level. The control method of the air cleaner according to claim 19, wherein the step of increasing each air volume level of the air purification part corresponding to each comprehensive purification degree includes: setting the Incremental steps for the second air volume level. The control method of the air purifier as described in claim 17, further comprising: providing a ventilation request to the user when the carbon dioxide concentration detected by a carbon dioxide sensor part meets a preset ventilation standard A step of.

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