WO2016208891A1

WO2016208891A1 - Air purifier

Info

Publication number: WO2016208891A1
Application number: PCT/KR2016/006039
Authority: WO
Inventors: Kietak Hyun
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2015-06-24
Filing date: 2016-06-08
Publication date: 2016-12-29
Anticipated expiration: 2017-12-24
Also published as: KR101774104B1; KR20170000529A

Abstract

The present invention relates to an air purifier. An air purifier according to one embodiment of the present invention includes a housing having an inlet port and an outlet port; a fan motor assembly configured to generate an air flow in the housing; a dust separator configured to separate dust from air suctioned into the housing through the inlet port; a dust storage part configured to store the dust separated in the dust separator; and a filter unit configured to purify the air discharged from the dust separator.

Description

AIR PURIFIER

The present invention relates to an air purifier.

An air purifier is a device which suctions air, filters dust, germs or the like, and thus purifies the air.

Generally, the air purifier may comprise a plurality of filters, and while the air passes, in turn, through the plurality of filters, the dust, the germs or the like may be filtered.

In the case of the air purifier, since the plurality of filters may be covered with the dust or foreign substances during a purifying process of the air, the plurality of filters should be periodically cleaned, and it is inconvenient for a user.

And to clean the filters, the air purifier should be disassembled, and the plurality of filters should be taken out of the air purifier, and then each of the plurality of filters should be cleaned. Therefore, it is difficult to clean the filters.

Meanwhile, to solve the problems, a technique in which a cyclone dust collector is installed at the air purifier has been proposed.

In Korean Patent No. 0580300 (registered on May 09, 2006) as a prior art, there is disclosed an air purifier.

The air purifier disclosed in the prior art includes a cyclone dust collector, and a plurality of filters which purifies air discharged from the cyclone dust collector.

However, even when the cyclone dust collector is provided at the air purifier, there is a problem that fine dust may not be properly separated in the cyclone dust collector, and may flow toward the filters, and thus the filters may be covered with the fine dust. In this case, the filters should be also cleaned.

The prior art has also the problem that the air purifier should be disassembled to clean the filters.

Also, since the air introduced into a housing should flow through an inside of the cyclone dust collector, a pressure loss of the air in the air purifier is larger than that of the air when the cyclone dust collector is not provided. In this case, a flow rate of the air becomes smaller, and thus it takes a long time to purify the air within a predetermined indoor space.

The present invention is directed to providing an air purifier in which a path loss in a cyclone separator is reduced when air is purified using the cyclone separator, and thus air purifying performance is enhanced, and the number of filter cleaning operations is reduced.

According to an aspect of the present invention, an air purifier comprises a housing including an intake port and a discharge port; a fan motor assembly configured to generate an air flow in the housing; a dust separator to separate dust from air suctioned into the housing through the intake port; a dust storage unit to store the dust separated in the dust separator; and a filter unit to purify the air discharged from the dust separator.

The dust separator may comprise a first cyclone separator, a second cyclone separator and a flow guide guiding dust separated from the first and second cyclone separators to the filter unit.

Each of the cyclone separators may comprise an air inlet through which the air in the housing is introduced and a dust outlet through which the dust separated from the air is discharged.

The flow guide may comprise an air outlet for discharging the air which is separated from the dust at each of the cyclone separators.

The air outlet may be located between the air inlets of each of the cyclone separators.

The flow guide may further comprise a connection flow path in which the air discharged from each of the cyclone separators is introduced.

Some or all of the connection flow path may be disposed between the first cyclone separator and the second cyclone separator.

The air outlet may comprise a first air outlet for discharging the air of the first cyclone separator and a second air outlet for discharging the air of the second cyclone separator.

The first air outlet and the second air outlet may be disposed to face each other.

The connection flow path may be located between the first air outlet and the second air outlet.

The dust outlet may comprise a first dust outlet for discharging dust of a first cyclone body and a second dust outlet for discharging dust of a second cyclone body.

The connection flow path may be located between the first dust outlet and the second dust outlet.

A direction in which the air is discharged from the first air outlet to the connection flow path may be opposite to a direction in which the air discharged from the second air outlet to the connection flow path.

The first cyclone separator may comprise a first cyclone body for a spiral flow of the air and dust, and the second cyclone separator may include a second cyclone body for the spiral flow of the air and dust.

An axis of a cyclone flow in each of the cyclone bodies may be disposed in a straight line or in parallel.

The first air outlet may be inserted in the first cyclone body and the second air outlet may be inserted in the second cyclone body.

A distance from the air inlet of each of the cyclone parts to the dust outlet may be longer than a distance from the air inlet of each of the cyclone parts to the air outlet.

A plurality of first cyclone separators may be located on one side of the connection flow path, and a plurality of second cyclone separators may be located on the other side of the connection flow path.

The flow guide may further include a main flow path part guiding the air introduced to the connection flow path to the filter unit.

The main flow path part may be formed so that a cross-sectional area of the flow path is increased in a direction away from the connection flow path.

The air inlet of each of the cyclone separators may be disposed to face the air outlet.

Each of the cyclone separators may further comprise an air inlet guide guiding the air introduced through the air inlet to flow spirally.

The dust storage unit may comprise a first dust inlet through which dust discharged from the first cyclone separator is introduced and a second dust inlet through which dust discharged from the second cyclone separator is introduced.

The filter unit may comprise a plurality of filters and an array direction of the first cyclone separator and the second cyclone separator may be crossed with an array direction of the plurality of filters.

Another aspect of the present invention provides an air purifier comprises a housing including an intake port and a discharge port; a fan motor assembly to generate an air flow in the housing; a dust separator configured to separate dust from air suctioned into the housing through the intake port; a dust storage unit to store the dust separated in the dust separator; and a filter unit which purifies the air discharged from the dust separator, and the dust separator includes a first cyclone separator and a second cyclone separator and each of the cyclone separators includes an air inlet through which the air in the housing is introduced, a dust outlet through which the dust separated from the air is discharged and an air outlet through which the air separated from the dust is discharged.

Each of the cyclone separators may be disposed so that the air outlet is located between the air inlets of each of the cyclone separators.

The air purifier may further comprise a flow guide guiding the air discharged through the air outlet of each of the cyclone separators to the filter unit.

At least a portion of the flow guide may be located between the air outlets of each of the cyclone separators.

According to the proposed invention, since the air can be axially introduced into the cyclone body through the air inlet, the air inlet can become larger than a case in which the air is introduced into the cyclone body in a tangent direction, and thus a flow loss of the air can be reduced.

Also, according to the embodiment, since the air outlet is located close to the dust outlet, the air and the dust can flow as close as possible to the dust outlet while spirally flowing, and thus dust separation performance can be enhanced.

Also, since each of the cyclone separators is disposed so that the air outlet is located between the air inlets of each of the cyclone separators, the air purifier may have a compact size.

FIG. 1 is a view schematically illustrating an air purifier according to a first embodiment.

FIG. 2 is a perspective view of an internal configuration of the air purifier according to the first embodiment.

FIG. 3 is an exploded perspective view of a dust separator according to the first embodiment.

FIG. 4 is a perspective view of a cyclone separator according to the first embodiment.

FIG. 5 is a cross-sectional view of the cyclone separator of the FIG. 4.

FIG. 6 is a perspective view of a flow guide according to the first embodiment.

FIG. 7 is a view illustrating an air flow in the air purifier according to the first embodiment.

FIG. 8 is a view illustrating a cyclone body according to a second embodiment.

FIG. 9 is a view illustrating a flow guide according to a third embodiment.

Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings.

In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration specific preferred embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, and it is understood that other embodiments may be utilized and that logical structural, mechanical, electrical, and chemical changes may be made without departing from the scope of the invention. To avoid detail not necessary to enable those skilled in the art to practice the invention, the description may omit certain information known to those skilled in the art. The following detailed description is, therefore, not to be taken in a limiting sense.

Also, in the description of embodiments, terms such as first, second, A, B, (a), (b) or the like may be used herein when describing components of the present invention. Each of these terminologies is not used to define an essence, order or sequence of a corresponding component but used merely to distinguish the corresponding component from other component(s). It should be noted that if it is described in the specification that one component is “connected,” “coupled” or “joined” to another component, the former may be directly “connected,” “coupled,” and “joined” to the latter or “connected”, “coupled”, and “joined” to the latter via another component.

FIG. 1 is a view schematically illustrating an air purifier according to a first embodiment, and FIG. 2 is a perspective view of an internal configuration of the air purifier according to the first embodiment.

FIG. 3 is an exploded perspective view of a dust separator according to the first embodiment, FIG. 4 is a perspective view of a cyclone separator according to the first embodiment, and FIG. 5 is a cross-sectional view of the cyclone separator of the FIG. 4.

FIG. 6 is a perspective view of a flow guide according to the first embodiment.

Referring to FIGS. 1 to 6, an air purifier 1 according to the embodiment of the present invention may include a housing 10 having an intake port 11 through which air which needs purifying is suctioned and a discharge port 12 through which purified air is discharged.

The housing 10 may be manufactured by coupling a plurality of members, and the intake port 11 may be formed at one of the plurality of members, and the discharge port 12 may be formed at another member. Alternatively, the intake port 11 and the discharge port 12 may be formed at one of the plurality of members. In the present invention, a shape of the housing 10 and positions of the intake port 11 and the discharge port 12 are not limited.

The air purifier 1 may further comprise a fan motor assembly 13 which generates an air flow in the housing 10.

The fan motor assembly 13 may comprise a fan motor 14, a fan 15 which is rotated by the fan motor 14, and a fan housing 16 which accommodates the fan 15.

In the specification, a structure of the fan motor assembly 13 is not limited, and the fan motor assembly 13 may be used to blow air or to suction and discharge the air.

The air purifier 1 may further comprise a dust separator 20 which separates dust from the air suctioned into the housing 10 through the intake port 11, and a dust storage unit 30 which stores the dust separated in the dust separator 20.

The dust separator 20 may comprise a plurality of

cyclone separators

200 and 210 which generate a cyclone flow and separate dust from air and a flow guide 240 guiding air discharged from the plurality of

cyclone separators

200 and 210 to the filter unit 40.

The air purifier 1 may further comprise a filter unit 40 which purifies the air discharged from the dust separator 20. The air passing through the filter unit 40 may be discharged to an outside of the housing 10 through the discharge port 12.

The fan motor assembly 13 may be disposed at an upstream side of the dust separator 20, between the dust separator 20 and the filter unit 40, or at a downstream side of the filter unit 40 based on the flow of air in the housing 10.

The filter unit 40 may comprise a filter case 410, and one or

more filters

430, 440 and 450 which are accommodated in the filter case 410. For example, the filter case 410 may accommodate a plurality of

filters

430, 440 and 450.

Hereinafter, the dust separator will be described in detail.

The plurality of

cyclone separators

200 and 210 may include a first cyclone separator 200 and a second cyclone separator 210.

Each of the

cyclone separators

200 and 210 may comprise

cyclone bodies

220 and 222 to ensure a spiral flow of air and dust. The

cyclone bodies

220 and 222 may be formed in a cylindrical shape or a conical or truncated conical shape.

A first cyclone body 220 is located on one side of the flow guide 240 and a second cyclone body 222 may be located on the other side of the flow guide 240.

The dust separator 20 may further comprise

air inlets

224 and 225 through which the air in the housing 10 is introduced and

air outlets

230 and 232 through which air separated from dust is discharged and

dust outlets

226 and 227 through which dust separated from air is discharged.

The air inlets 224 and 225 and the

dust outlets

226 and 227 may be provided at the

cyclone bodies

220 and 222, and the

air outlets

230 and 232 may be provided at the flow guide 240.

The air inlets 224 and 225 comprise a first air inlet 224 provided on the first cyclone body 220 and a second air inlet 225 provided on the second cyclone body 222.

The

dust outlets

226 and 227 comprise a first dust outlet 226 provided on the first cyclone body 220 and a second dust outlet 227 provided on the second cyclone body 222.

The

air outlets

230 and 232 may comprise a first air outlet 230 for discharging air from the first cyclone body 220 and a second air outlet 232 for discharging air from the second cyclone body 222.

In addition, the

air outlets

230 and 232 may be inserted in the

cyclone bodies

220 and 222. For this, openings 228 and 229 may be provided on the

cyclone bodies

220 and 222 for the

air outlets

230 and 232 to be inserted. The openings 228 and 229 may be located on the opposite side of the

air inlets

224 and 225 in the

cyclone bodies

220 and 222.

The

air outlets

230 and 232 may be disposed to face the

air inlets

224 and 225. In addition, an air outlet 230 of the first cyclone separator 200 may be disposed to face an air outlet 232 of the second cyclone separator 210.

The

dust outlets

226 and 227 may be disposed adjacent to the

air outlets

230 and 232. At this time, a direction in which dust is discharged from the

dust outlets

226 and 227 may be crossed with a direction in which air is discharged from the

air outlets

230 and 232.

Each of the

cyclone separators

200 and 210 may be disposed so that the

air outlets

230 and 232 are located between the

air inlets

224 and 225 of each of the

cyclone separators

200 and 210.

And, an axis of the cyclone flow generated in the first cyclone body 220 may be located on the same line as or parallel with an axis of the cyclone flow generated in the second cyclone body 222.

Therefore, according to the embodiment of the present invention, as there are a plurality of

cyclone separators

200 and 210 disposed in parallel, separation performance of the dust may be improved.

In addition, since each of the

cyclone separators

200 and 210 is disposed so that the

air outlets

230 and 232 are located between the

air inlets

224 and 225 of each of the

cyclone separators

200 and 210, the air purifier may have a compact size.

Although not limited, an extending direction of an axis of the cyclone flow generated in the

cyclone bodies

220 and 222 may be crossed with an array direction of the plurality of

filters

430, 440 and 450.

The air introduced into the housing 10 may be introduced into the

cyclone bodies

220 and 222 through the

air inlets

224 and 225 in a longitudinal direction (hereinafter, referred to as an “axial direction”) of the

cyclone bodies

220 and 222.

In the present invention, the longitudinal direction of the

cyclone bodies

220 and 222 is the same as the extending direction of the axis of the cyclone flow which is generated in the

cyclone bodies

220 and 222.

To allow the spiral flow of the air introduced through the

air inlets

224 and 225 in the axial direction of the

cyclone bodies

220 and 222, each of the

cyclone separators

200 and 210 may further include an air inlet guide 250.

At this time, a cyclone flow in the first cyclone separator 200 and a cyclone flow in the second cyclone separator 210 may move in a direction approaching each other.

At least a portion of the air inlet guide 250 may be accommodated in the

cyclone bodies

220 and 222.

The air inlet guide 250 may include a guide body 252, and a plurality of vanes 254 which are provided at an outer circumferential surface of the guide body 252 so as to cause the spiral flow of the air.

One part of the guide body 252 may be formed in a cylindrical shape, and the other part thereof may be formed so that a diameter thereof is gradually reduced toward the

air outlets

230 and 232. For example, the other part of the guide body 252 may be formed in a conical shape or a truncated conical shape.

The plurality of vanes 254 may be disposed to be spaced apart from each other in a circumferential direction of the guide body 252. The plurality of vanes 254 may be rounded in a spiral shape so as to allow the spiral flow of the air. At this point, an angle of each of the plurality of vanes 254 with respect to a longitudinal axis of the cyclone bodies 220 and 222 (which is the same as the axis of the cyclone flow) is not limited, but may be 5 to 20 degrees.

When the plurality of vanes 254 are disposed at an angle less than 5 degrees, the plurality of the vanes 254 serve as resistance to the air, and thus the path loss of the air may be considerably increased.

Also, when the plurality of vanes 254 are disposed at an angle greater than 20 degrees, the air may not be sufficiently guided by the plurality of vanes 254, and thus the number of revolutions of the air which spirally flows in the

cyclone bodies

220 and 222 is reduced. Also, an interval between the plurality of vanes 254 is increased, and thus an amount of the air which is not guided and passing between the vanes 254 is increased.

An initial point of the plurality of vanes 254 at which the air flow is initially guided is located within the

cyclone bodies

220 and 222, and may be located to be spaced apart from the

air inlets

224 and 225 at a predetermined distance.

Therefore, the air introduced into the

cyclone bodies

220 and 222 through the

air inlets

224 and 225 may flow by a predetermined distance in the longitudinal direction of the

cyclone bodies

220 and 222, then may be guided by the guide vanes 254, and may spirally flow.

Meanwhile, a distance from the

air inlets

224 and 225 to ends 230a and 232a of the

air outlets

230 and 232 may be smaller than a distance from the

air inlets

224 and 225 to the

dust outlets

226 and 227.

In addition, a direction in which air is introduced to the

cyclone bodies

220 and 222 through the

air inlets

224 and 225 and a direction in which air is discharged from the

cyclone bodies

220 and 222 through the

air outlets

230 and 232 are the same.

According to the embodiment, since the air may be axially introduced into the

cyclone bodies

220 and 222 through the

air inlets

224 and 225, the

air inlets

224 and 225 may become larger than a case in which the air is introduced into the

cyclone bodies

220 and 222 in a tangent direction, and thus a flow loss of the air may be reduced.

Also, according to the embodiment, since the

air outlets

230 and 232 are located close to the

dust outlets

226 and 227, the air and the dust may flow as close as possible to the

dust outlets

226 and 227 while spirally flowing, and thus dust separation performance may be enhanced.

In general, as a distance of the spiral flow of the air and the dust is increased, the separation performance may be increased. In the embodiment, since the air and the dust flow to a position close to the

dust outlets

226 and 227 while sprially flowing together, the separation performance may be enhanced.

Also, since the

air outlets

230 and 232 are located between the

air inlets

224 and 225 and the

dust outlets

226 and 227, the dust which spirally flows along the inner circumferential surface of the

cyclone bodies

220 and 222 may be minimized from being discharged to the

air outlets

230 and 232 before being discharged to the

dust outlets

226 and 227.

The flow guide 240 may include a flow path forming part 242 forming a connection flow path 244 through which air discharged from the first cyclone separator 200 and the second cyclone separator 210 is introduced.

The connection flow path 244 is a flow path in which air discharged from the first cyclone separator 200 and air discharged from the second cyclone separator 210 are combined. Some of or the entire connection flow path 244 may be disposed between the first cyclone separator 200 and the second cyclone separator 210.

In one example, the connection flow path 244 may be located between the first air outlet 230 and the second air outlet 232. In addition, the connection flow path 244 may be located between the first dust outlet 226 and the second dust outlet 227.

In addition, one or a plurality of first cyclone separators 200 may be located on one side of the connection flow path 244 and one or a plurality of second cyclone separators 210 may be located on the other side of the connection flow path 244.

And, the first air outlet 230 is disposed on one side of the flow path forming part 242, and the second air outlet 232 is located on the other side of the flow path forming part 242.

Therefore, a direction in which air is discharged from the first air outlet 230 to the connection flow path 244 is opposite to a direction in which air is discharged from the second air outlet 232 to the connection flow path 244.

The flow guide 240 may further comprise a main flow path part 246 guiding air discharged to the connection flow path 244 to the filter unit 40.

Meanwhile, the dust storage unit 30 may comprise a collecting body 310 forming a dust storage chamber in which dust is stored and a cover 320 opening and closing the collecting body 310.

The collecting body 310 may comprise a first dust inlet 312 through which dust discharged through the first dust outlet 226 of the first cyclone separator 200 is introduced and a second dust inelt 314 through which dust discharged through the second dust outlet 227 of the second cyclone separator 210 is introduced. The first dust inlet 312 and the second dust inlet 314 may be disposed to be spaced part in a vertical direction.

FIG. 7 is a view illustrating the air flow in the air purifier according to the first embodiment.

In FIG. 7, a solid line indicates the air, and a dotted line indicates the dust.

Referring to FIGS. 1 to 7, when the fan motor 14 is operated, the air may be suctioned through the intake port 11 of the housing 10 by rotation of the fan 15. The air suctioned through the intake port 11 of the housing 10 may be introduced into each of the

cyclone separators

200 and 210 through the

air inlets

224 and 225 of each of the

cyclone separators

200 and 210.

The flow of the air introduced into each of the

cyclone separators

200 and 210 is guided by the air inlet guide 250, and spirally flows along the inner circumferential surface of the

cyclone bodies

220 and 222. In this process, the air and the dust may be separated from each other.

The air separated from the dust in the

cyclone bodies

220 and 222 may be discharged to the connection flow path 244 through the

air outlets

230 and 232.

However, the dust separated from the air may be discharged through the

dust outlets

226 and 227. The dust discharged through the

dust outlets

226 and 227 is introduced to the dust storage unit 30 and stored therein.

The air discharged to the connection flow path 244 may flow to the filter unit 40 side by the main flow path part 246.

The air flowed toward the filter unit 40 is filtered again while passing through the plurality of

filters

430, 440 and 450, and finally discharged to the outside of the housing 10 through the discharge port 12 of the housing 10.

FIG. 8 is a view illustrating a cyclone body according to a second embodiment.

The embodiment is the same as the first embodiment, but is different from the first embodiment in a location of the air outlet. Therefore, hereinafter, only characteristic parts of the embodiment will be described.

Referring to FIG. 8, in the case of the

cyclone separators

200 and 210 according to the embodiment, an air outlet 234a may be formed in the

cyclone bodies

220 and 222. And a discharge guide 234 guiding a flow of air discharged through the air outlet 234a may be provided in the

cyclone bodies

220 and 222.

In the present embodiment, the air outlet 234a may be disposed between the

air inlets

224 and 225 and the

dust outlets

226 and 227.

FIG. 9 is a view illustrating a flow guide according to a third embodiment.

The embodiment is the same as the first embodiment, but is different from the first embodiment in a shape of the main flow path part. Therefore, hereinafter, only characteristic parts of the embodiment will be described.

Referring to FIG.9, a flow guide 240a according to the embodiment may include a flow path forming part 242a forming a connection flow path, and a main flow path part 246a extending from the flow path forming part 242a and formed so that a cross-sectional area of the flow path is increased in a direction away from the flow path forming part 242a (or connection flow path).

That is, the main flow path part 246a may be extended obliquely from both sides of the flow path forming part 242a.

According to the embodiment of the present invention, the air discharged from the cyclone separator may spread widely by the main flow path part, and thus may be prevent from passing through only a portion of the filter unit of the air purifier.

Even though all the elements of the embodiments are coupled into one or operated in the combined state, the present disclosure is not limited to such an embodiment. That is, all the elements may be selectively combined with each other without departing the scope of the invention. Furthermore, when it is described that one comprises (or includes or has) some elements, it should be understood that it may comprise (or include or have) only those elements, or it may comprise (or include or have) other elements as well as those elements if there is no specific limitation. Unless otherwise specifically defined herein, all terms including technical or scientific terms are to be given meanings understood by those skilled in the art. Like terms defined in dictionaries, generally used terms needs to be construed as meaning used in technical contexts and are not construed as ideal or excessively formal meanings unless otherwise clearly defined herein.

Although embodiments have been described with reference to a number of illustrative embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the preferred embodiments should be considered in descriptive sense only and not for purposes of limitation, and also the technical scope of the invention is not limited to the embodiments. Furthermore, the scope of the invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being included in the present disclosure.

Claims

An air purifier comprising:

a housing including an intake port and a discharge port;

a fan motor assembly to generate an air flow in the housing;

a dust separator to separate dust from air suctioned into the housing through the intake port;

a dust storage part to store the dust separated in the dust separator; and

a filter unit to purify the air discharged from the dust separator,

wherein the dust separator comprises: a first cyclone separator, a second cyclone separator and a flow guide to guide dust separated from the first and the second cyclone separators to the filter unit, and

each of the cyclone separators comprises an air inlet through which the air in the housing is introduced and a dust outlet through which the dust separated from the air is discharged, and the flow guide compries an air outlet to discharge the air separated from the dust at each of the cyclone separators, and the air outlet is located between the air inlets of each of the cyclone separators.
The air purifier of claim 1, wherein the flow guide further comprises a connection flow path in which the air discharged from each of the cyclone separators is introduced, and some or all of the connection flow path is disposed between the first cyclone separator and the second cyclone separatior.
The air purifier of claim 2, wherein the air outlet comprises a first air outlet to discharge the air of the first cyclone separator and a second air outlet to discharge the air of the second cyclone separator, and the first air outlet and the second air outlet are disposed to face each other.
The air purifier of claim 3, wherein the connection flow path is located between the first air outlet and the second air outlet.
The air purifier of claim 3, wherein the dust outlet comprises a first dust outlet to discharge dust of the first cyclone separator and a second dust outlet to discharge dust of the second cyclone separator, and the connection flow path is located between the first dust outlet and the second dust outlet.
The air purifier of claim 3, wherein a direction in which the air discharged from the first air outlet to the connection flow path is opposite to a direction in which the air discharged from the second air outlet to the connection flow path.
The air purifier of claim 2, wherein the first cyclone separator comprises a first cyclone body for spiral flowing of the air and dust, and the second cyclone separatior comprises a second cyclone body for the spiral flowing of the air and dust, and an axis of a cyclone flow in each of the cyclone bodies is disposed in a straight line or in parallel.
The air purifier of claim 7, wherein the first air outlet is inserted in the first cyclone body and the second air outlet is inserted in the second cyclone body.
The air purifier according to claim 8, wherein a distance from the air inlet of each of the cyclone separators to the dust outlet is longer than a distance from the air inlet of each of the cyclone separators to the air outlet.
The air purifier according to claim 2, wherein a plurality of first cyclone separatiors are located on one side of the connection flow path and a plurality of second cyclone separators are located on the other side of the connection flow path.
The air purifier of claim 2, wherein the flow guide further comprises a main flow path part guiding the air introduced to the connection flow path to the filter unit and the main flow path part is formed so that a cross-sectional area of the flow path is increased in a direction away from the connection flow path.
The air purifier of claim 1, wherein the air outlet of each of the cyclone separators is disposed to face the air outlet.
The air purifier of claim 1, wherein each of the cyclone separators further comprises an air inlet guide to guide the air introduced through the air inlet to flow spirally.
The air purifier of claim 1, wherein the dust storage unit comprises a first dust inelt through which dust discharged from the first cyclone separator is introduced and a second dust inlet through which dust discharged from the second cyclone separator is introduced.
The air purifier of claim 1, wherein the filter unit comprises a plurality of filters and an array direction of the first cyclone separator and the second cyclone separator is crossed with an array direction of the plurality of filters.
An air purifier comprising:

a housing including an intake port and a discharge port;

a fan motor assembly to generate an air flow in the housing;

a dust separator to separate dust from air suctioned into the housing through the intake port;

a dust storage unit to store the dust separated in the dust separator; and

a filter unit to purify the air discharged from the dust separator,

wherein the dust separator comprises a first cyclone separator and a second cyclone separator, and

each of the cyclone separators comprises an air inlet through which the air in the housing is introduced and a dust outlet through which the dust separated from the air is discharged and an air outlet through which the air separated from the dust is discharged, and

each of the cyclone separators is disposed so that the air outelt is located between the air inlets of each of the cyclone separators.
The air purifier of claim 16, wherein the air inlet of each of the cyclone separators is disposed to face the air outlet.
The air purifier of claim 16, wherein a distance from the air entrance port of each of the cyclone separators to the dust outlet is longer than a distance from the air inlet of each of the cyclone separators to the air outlet.
The air purifier of claim 17, further comprising a flow guide to guide the air discharged through the air outlet of each of the cyclone separators to the filter unit.
The air purifier of claim 19, wherein at least a portion of the flow guide is located between the air outlets of each of the cyclone separators.
The air purifier of claim 16, wherein the filter unit comprises a plurality of filters and an array direction of the first cyclone separator and the second cyclone separator is crossed with an array direction of the plurality of filters.