CN1316204C

CN1316204C - Ventilating system

Info

Publication number: CN1316204C
Application number: CNB2005100713917A
Authority: CN
Inventors: 金景桓
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2004-05-21
Filing date: 2005-05-19
Publication date: 2007-05-16
Anticipated expiration: 2025-05-19
Also published as: KR100577206B1; EP1600705A2; US20050260946A1; KR20050111161A; EP1600705A3; CN1699859A

Abstract

The present invention discloses a ventilation system for supplying outdoor air to a room or exhausting indoor air to the outside. The ventilation system includes a housing having an inlet and an outlet in fluid communication with the chamber. The housing is in fluid communication with the outdoors through a first flow passage. A second flow channel is disposed inside the housing such that the outlet is in fluid communication with the first flow channel. A third flow channel is disposed inside the housing such that the inlet is in fluid communication with the first flow channel. The casing is provided with a fan unit for sucking indoor air through the third flow passage and discharging it to the outdoors through the first flow passage, or sucking outdoor air through the first flow passage and the second flow passage and supplying it indoors. . A first damper is disposed between the outdoor and the fan unit to alternately open the second flow channel or the third flow channel. Therefore, the present invention can provide a small and inexpensive ventilation system and can reduce fan noise and power consumption.

Description

Ventilating system

The application requires the rights and interests of the korean patent application No.10-2004-0036359 of application on May 21st, 2004, and therefore, this application is quoted by the mode of reference as intactly being described in the specification.

Technical field

The present invention relates to a kind of ventilating system, be used for outdoor air is provided to indoor, or room air be expelled to outdoor.

Background technology

Because the air in indoor people's the breathing etc., confined chamber is polluted as time passes gradually.Therefore, the air of pollution need exchange continually by ventilating system etc. and fresh outdoor air.

The ventilating system of common type comprises: air supply fan is used for outdoor air is provided to indoor; Air supply pipe is used for outdoor air is directed in the housing (case) of ventilating system; Exhaust fan is used for room air is expelled to outdoor; And blast pipe, be used for room air is directed to the outside.Here, air supply fan and exhaust fan are co-located on the enclosure interior of system, have therefore caused the huge housing of this system.In addition, two fans and two pipelines have increased the installation cost of system.In addition, traditional system uses two fans, has caused a large amount of noises and high power consumption.

Summary of the invention

Therefore, for the problems referred to above that solve in this field propose the present invention, and an object of the present invention is to provide a kind of small-sized and cost-efficient ventilating system.

Another object of the present invention provides a kind of ventilating system that can reduce fan noise and power consumption thereof.

For realizing above-mentioned purpose of the present invention, according to a scheme of the present invention, provide a kind of ventilating system, comprising: housing has the entrance and exit that is communicated with indoor fluid; First flow channel makes this housing be communicated with outdoor fluid; Second flow channel makes this outlet be communicated with this first flow channel fluid, and this second flow channel is arranged on this enclosure interior; The 3rd flow channel makes this inlet be communicated with this first flow channel fluid, and the 3rd flow channel is arranged on this enclosure interior; Fan unit, has single fan, this single fan sucks room air and is expelled to outdoor by this first flow channel by the 3rd flow channel, perhaps by this first flow channel and the second flow channel suction chamber outer air and provide to indoor, this fan unit is arranged on this enclosure interior; And first air-lock, alternately open this second flow channel and the 3rd flow channel, this first air-lock be arranged on outdoor and this fan unit between.

This fan unit sucks air vertically, and radially with its discharge.This housing can be arranged in the ceiling.

In above-mentioned ventilating system, this second flow channel and the 3rd flow channel are communicated with at the mutual fluid of this enclosure interior, and the point that this fan unit is installed to be to be connected communicatively by this second flow channel and the mutual fluid of the 3rd flow channel sucks air.

This fan unit comprises: spiral case, be arranged on this enclosure interior, and this single fan is arranged on this spiral case inside; Shared inlet, the room air that flows through the outdoor air of this second flow channel or flow through the 3rd flow channel is by this shared inlet inflow, and this shared inlet is arranged in this spiral case; First outlet is communicated with this outlet fluid of this housing, and is arranged in this spiral case; And second the outlet, be communicated with this first flow channel fluid, and be arranged in this spiral case.

This fan sucks leaked-in air vertically by this shared inlet, subsequently it is radially discharged towards this first outlet and this second outlet.This shared inlet is set to so that it is communicated with the coupling part of this first flow channel and this second flow channel and the inlet fluid of this housing.

Ventilating system of the present invention also can comprise dividing plate, and the inner space of this housing is divided into two spaces.This dividing plate is arranged on this enclosure interior.This fan unit is installed by this way, that is, it is arranged in any of described two spaces, and suck the air of another interior volume, and it is expelled in any of described two spaces.

Ventilating system of the present invention also can comprise second air-lock, optionally opens and closes this inlet.This second air-lock is arranged in this housing.In addition, this system also can comprise the 3rd air-lock, optionally opens and closes this outlet.The 3rd air-lock is arranged in this housing.And this system also can comprise the 4th air-lock, alternately opens this inlet and this outlet.The 4th air-lock is arranged in this housing.

In above-mentioned ventilating system, this inlet is arranged on the bottom surface of this housing, and this outlet is arranged on the side of this housing.Perhaps, this inlet can be arranged on the side downside of this housing, and this outlet can be arranged on the side upside of this housing.

Ventilating system of the present invention also can comprise heater, and heating is provided to indoor outdoor air.This heater is arranged in this first flow channel.In addition, system of the present invention also can comprise filter, purifies to be provided to indoor outdoor air.This filter is arranged in this second flow channel.

According to another aspect of the present invention, provide a kind of ventilating system, comprising: housing has the entrance and exit that is communicated with indoor fluid; Pipeline makes this housing be communicated with outdoor fluid, and alternately outdoor air is directed to this housing or is directed to the room air of this enclosure interior outdoor; Fan unit has single fan, and this single fan sucks the air that enters this housing by this inlet or pipeline, discharges towards this outlet and this pipeline subsequently, and this fan unit is arranged on this enclosure interior; And first air-lock, alternately intercepting from the single fan row of this fan unit outdoor air to this fan unit is provided to the room air of this pipeline or from this pipeline, this first air-lock is arranged between this pipeline and this fan unit.

This fan unit comprises: shared inlet, be communicated with inlet and this pipeline fluid of this housing, and this single fan sucks air by this shared inlet, subsequently with its discharging; First outlet will be directed to the outlet of this housing from the air that this fan is discharged; And second outlet, will be directed to this pipeline from the air that this fan is discharged.

Above-mentioned ventilating system also can comprise the dividing plate that is arranged on this enclosure interior.This dividing plate is divided into two spaces with the inner space of this housing, and air enters this fan unit by one of them of described two spaces, and by wherein another is discharged from this fan unit.Here, this first air-lock is installed on this dividing plate, alternately to close described two spaces by this separator lined.

Ventilating system of the present invention also can comprise the air-lock that at least one is additional, and it closes this inlet and this outlet of this housing respectively or alternately.

According to another scheme of the present invention, a kind of ventilating system is provided, comprising: housing comprises the entrance and exit that is communicated with indoor fluid; Lower space is communicated with this inlet fluid; Upper space is communicated with this outlet fluid; And shared inlet, this upper space is communicated with this lower space fluid; Pipeline makes the upper space of this housing and lower space be communicated with outdoor fluid; Single fan sucks the air of this lower space, and it is discharged towards this upper space, and this upper space is communicated with this pipeline and this outlet fluid, and this fan is arranged on this enclosure interior; And first air-lock, this pipeline alternately is communicated with this upper space or this lower space fluid, this first air-lock be arranged on outdoor and this fan between.

Description of drawings

Further understanding of the present invention is provided and comprised and be merged in the accompanying drawing of forming the application's part and show embodiments of the invention, and with specification in order to explain principle of the present invention.In the accompanying drawings:

Fig. 1 is the schematic diagram that illustrates when system operates in blowing model according to the ventilating system of the first embodiment of the present invention;

Fig. 2 is the stereogram that the ventilating system outward appearance of Fig. 1 is shown;

Fig. 3 is the schematic diagram that illustrates when system operates in exhaust mode according to the ventilating system of the first embodiment of the present invention;

Fig. 4 is the schematic diagram that ventilating system according to a second embodiment of the present invention is shown when system operates in blowing model;

Fig. 5 is the stereogram that the system appearance of Fig. 4 is shown;

Fig. 6 is the schematic diagram that ventilating system according to a second embodiment of the present invention is shown when system operates in exhaust mode; And

Fig. 7 is the stereogram that the ventilating system outward appearance of Fig. 6 is shown.

The specific embodiment

Describe the preferred embodiments of the present invention below in detail, the example is illustrated in the accompanying drawing.In specification, represent components identical with identical drawing reference numeral, and no longer repeat explanation for similar elements.

Fig. 1 to Fig. 3 illustrates the ventilating system according to first embodiment of the invention.Consult Fig. 1 to Fig. 3, ventilating system of the present invention is provided with housing 100, and it will be placed in indoor.For example, housing 100 has angled comer, to be installed in the turning of ceiling 10, as shown in Figure 2.Housing 100 is installed by this way: the end face of housing 100 closely contacts ceiling 10, and closely contacts indoor wall 20 from two side that angled comer is extended.Do not provide between ceiling 10 and the upper layer undersurface enough space with the situation that ventilating system housing and pipeline are installed under, this kind structure is very useful.

Housing 100 is provided with inlet 110 and outlet 120, and it is that fluid is communicated with the inside in room.In the ventilating system of first embodiment, inlet 110 is arranged on the bottom surface of housing 100, as shown in Figure 1; The side that outlet 120 is arranged on housing 100 is with towards the inside in room, as shown in Figure 2.In housing 100, can have circular face towards the side of house interior, and outlet 120 is set so that air can be provided to indoor with various directions.

As mentioned above, housing 100 110 is connected with indoor fluid with outlet 120 communicatively by entering the mouth, and is connected communicatively with outdoor fluid by first flow channel 1, as shown in figures 1 and 3.Limit first flow channel 1 by being mounted with the pipeline 200 that passes wall 20, and the one end for example is communicated with outdoor fluid, its other end is connected in housing 100.End at pipeline 200 is provided with opening 210 and aperture plate, and pipeline 200 is communicated with outdoor fluid through it.Form the other end of pipeline 200 by this way: its diameter enlarges gradually towards housing 100.Along the first fluid passage 1 that is limited by pipeline 200, outdoor air flows in the housing 100, perhaps is discharged to outdoor by 110 room airs of introducing housing 100 that enter the mouth.

At housing 100 inner second flow channel 2 and the 3rd flow channels 3 of forming, the outdoor air that enters housing 100 by pipeline 200 is led to indoor through this second flow channel 2,110 room airs that enter housing 100 are led in the pipeline 200 through the 3rd flow channel 3 by entering the mouth.Here, second flow channel, 2 fluids are communicated with first flow channel 1 and export 120, and the 3rd flow channel 3 fluids are communicated with first flow channel 1 and enter the mouth 110.

As Fig. 1 and shown in Figure 3, second flow channel 2 and the 3rd flow channel 3 be fluid connection and intersection mutually in housing 100.In addition, in the position of

second flow channel

2 and 3 mutual fluids connections of the 3rd flow channel and intersection fan unit 300 is set.Fan unit 300 is used for providing to indoor through first flow channel 1 and second flow channel, 2 suction chamber outer air and with it, perhaps sucks room airs and it is expelled to outdoor through first flow channel 1 through the 3rd flow channel 3.To further specify fan unit 300 below with reference to Fig. 1 and Fig. 3.

Fan unit 300 is formed with spiral case (scroll casing) 310 and is arranged on fan 330 in the spiral case 310.Spiral case 310 for example is arranged on the top of housing 100 inside, and the bottom surface of spiral case 310 is divided into lower space and upper space with the inner space of housing 100.Here, can replace spiral case 310 by dividing plate 350 and divide upper space and lower space.In the case, dividing plate 350 is installed by this way: make its inside of flatly passing housing 100, and spiral case 310 is installed near the centre of dividing plate 350.

On the other hand, lower space is communicated with inlet 110 fluids, and upper space is communicated with outlet 120 fluids.In addition, upper space and lower space all are communicated with pipeline 200 fluids that limit first flow channel 1.Upper space and lower space are isolated fully, but by be formed near spiral case 310 centers shared inlet 311 and mutually fluid be communicated with.Here, be used for that outdoor air is directed to the second indoor flow channel 2 and originate in first flow channel 1 and the mutual intersection of lower space, through shared inlet 311, up to outlet 120.Be used for that room air is directed to the 3rd outdoor flow channel 3 and originate in inlet 110, through shared inlet 311, up to first flow channel 1 and the mutual intersection of upper space.

Fan 330 is arranged on housing 100 inside, is used for sucking the air of lower space and enters upper space.More particularly, fan 330 is arranged in the upper space, and be installed as the air that makes in the lower space and be inhaled into vertically by shared inlet 311, second flow channel 2 is communicated with at this mutual fluid in shared inlet 311 places with the 3rd flow channel 3, and fan 330 is radially with its discharge.The side surrounding of spiral case 310 is arranged on the side of the fan 330 in the upper space, and will guide towards the outlet 120 and first pipeline 200 of housing 100 from the air that fan 330 is radially discharged.For this reason, first outlet 313 that is communicated with outlet 120 fluids of housing 100 and second outlet 315 that is communicated with first pipeline, 200 fluids are set in the side of spiral case 310.

First air-lock (damper) 410 is set between fan unit 300 and outside, room, and it alternately is communicated with pipeline 200 with upper space or lower space fluid.More particularly, first air-lock 410 is installed on dividing plate 350 or the spiral case 310, is used for alternately opening second flow channel 2 and the 3rd flow channel 3.As shown in figures 1 and 3, first air-lock 410 is installed in the dividing plate 350 pivotally, and the twisted rotary shaft rotation, thereby alternately opens second flow channel 2 and the 3rd flow channel 3.But, the invention is not restricted to above-mentioned explanation.As selection, dividing plate 350 can be provided with a plurality of transom windows in the downside mounted thereto, optionally to open second outlet, 120 and second flow channel 2.

When ventilating system runs on blowing model, close the 3rd flow channel 3 that is formed in the upper space as first air-lock 410 of above-mentioned installation, as shown in Figure 1.Then, along with fan 330 rotations, outdoor air is by the lower space of first flow channel 1 and second flow channel, 2 inflow housings 100, and room air flows into lower space by inlet the 110 and the 3rd flow channel 3.The outdoor air and the room air that flow into lower space are inhaled into fan 330 by shared inlet 311, and first inlet, 313 and second inlet 315 in upper space is discharged subsequently.Here, because second inlet 315 blocked by first air-lock 410, so the air of discharging is provided to indoor by first outlet 120.

When ventilating system ran on exhaust mode, first air-lock 410 cut out second flow channel 2 that is formed in the lower space, as shown in Figure 3.Then, along with fan 330 rotations, room air flows into lower space by inlet the 110 and the 3rd flow channel 3, is inhaled into fan 330 by shared inlet 311 subsequently.The air of suction fan 330 is discharged by first inlet, 313 and second inlet 315 in upper space.At this moment, because first inlet, 313 and second inlet 315 all is opened, so that the air of discharging towards first inlet 313 are provided to is indoor, and the air of discharging towards second outlet 120 are disposed to outdoor by first flow channel 1.

As mentioned above, when ventilating system of the present invention ran on blowing model and exhaust mode, first air-lock 410 was controlled flowing of room airs and outdoor air.But, only can't obtain good drafting efficiency by first air-lock 410.In other words, as mentioned above, when being in blowing model, room air is in outdoor air flows into housing 100 and be provided to house interior, therefore can't introduce a large amount of outdoor airs indoor in short time period.In addition, when being in exhaust mode, the part room air that flows into housing 100 is disposed to outdoor, its remainder be provided be back to indoor.Therefore, in short time period, a large amount of room airs can't be disposed to the outside.Thereby, thereby for head it off obtains high drafting efficiency, housing 100 is provided with second air-lock 420 and the 3rd air-lock 430 respectively in inlet 110 and outlet 120, as shown in figures 1 and 3.

Second air-lock 420 is arranged in the housing 100, to open and close inlet 110.More particularly, when ventilating system ran on blowing model, second air-lock 420 cut out inlet 110, so that outdoor air is provided to indoor, as shown in Figure 1.As shown in Figure 3, room air is being expelled in the outdoor exhaust mode, second air-lock is opened inlet 110.In addition, the 3rd air-lock 430 is arranged in the housing 100, to open and close outlet 120.More particularly, in blowing model, the 3rd air-lock 430 is opened outlet 120, as shown in Figure 1; In exhaust mode, the 3rd air-lock 430 cuts out outlet 120, as shown in Figure 3.

On the other hand, in pipeline 200 inside, promptly in first flow channel 1, also be provided with heater 510, as shown in figures 1 and 3.In outside air temperature lower winter, heater 510 heating are provided to indoor outdoor air, have the air that is suitable for indoor temperature thereby can provide.And, in the lower part of frame space, particularly, also be provided with filter 520, as shown in figures 1 and 3 in second flow channel 2 and first flow channel, 1 confluce.When ventilating system of the present invention ran on blowing model, filter 520 was used to filter and is provided to indoor outdoor air.

As mentioned above, will further specify in further detail below, the ventilating system with first embodiment of said structure runs on blowing model and exhaust mode.

In blowing model, as shown in Figure 1, first air-lock 410 intercepts pipeline 200 and opens from the upper space that is provided with fan 330, and second air-lock 420 intercepts inlet 110, and the 3rd air-lock 430 is opened outlet 120.If fan 330 work, then outdoor air flows into housing 100 by first flow channel 1.At this moment, if winter, then heater 510 heating are by the outdoor air of pipeline 200.

Because first air-lock 410, the outdoor air that enters in the housing 100 flows into second flow channel 2 that is formed in the lower space, and is installed in filter 520 the earning in second flow channel 2.In addition, the outdoor air that flows along second flow channel 2 is by shared inlet 311 axially being inhaled into along fan 330.Then, fan 330 is discharged the outdoor air that sucks towards outlet 120 and pipeline 200.Here, open because the outdoor air that first air-lock 410 will move towards pipeline 200 intercepts from upper space, thus the outdoor air of discharging from fan 330 all by export 120 be provided to indoor.

In exhaust mode, as shown in Figure 3, first air-lock 410 intercepts pipeline 200 and opens from the lower space that is provided with filter 520, and second air-lock 420 opens inlet 110 and cuts out outlet 120.If fan 330 work, then room air flows into housing 100 by inlet 110.The room air that enters housing 100 moves along second flow channel 2, and flows towards fan 330 by shared inlet 311.Then, fan 330 is discharged room air towards pipeline 200 and outlet 120.At this moment, outlet 120 is closed by the 3rd air-lock 430, and therefore, the room air that flows into fan 330 all is discharged to outdoor by pipeline 200, as shown in Figure 3.

Fig. 4 to Fig. 7 illustrates the ventilating system according to second embodiment of the invention.As shown in the figure, except that the inlet 110 of housing, the ventilating system of second embodiment has the structure roughly the same with first embodiment.That is to say that among the embodiment in front, inlet 110 is arranged in the bottom surface of housing, but in this embodiment, inlet 110 is arranged in the side of housing 100.Below will concentrate on the structure of explanation second embodiment on the feature different with first embodiment.

As shown in Figure 4 and Figure 5, inlet 110 is arranged on the downside of the side of housing 100, and outlet is arranged on the upside of the side of housing 100.Inlet 110 and outlet 120 all are communicated with indoor fluid, and are separated from each other by spiral case 310 or dividing plate 350.In the ventilating system of second embodiment, inlet 110 and outlet 120 are mounted adjacent in the same one side of housing 100.Therefore, in the ventilating system according to second embodiment, inlet 110 and outlet 120 can alternately be opened by a single air-lock, and these are different with first embodiment.For this reason, be provided with additional air-lock, i.e. the 4th air-lock 440 in housing 100 inside, be used for alternately opening outlet 120 and inlet 110.On the other hand, outlet 120 and inlet 110 can be shaped as by two air-locks and open and close respectively, and be identical with first embodiment.

In blowing model, first air-lock 410 makes the lower space of housing 100 be communicated with pipeline 200 fluids, and prevents to enter pipeline 200 from the air that fan 330 is discharged, as shown in Figure 4.As shown in Figure 4 and Figure 5, the 4th air-lock 440 opens outlet 120 and cuts out inlet 110.When fan unit 300 work, outdoor air is via pipeline 200, lower space and shared inlet 311, be provided to by the outlet in the side that is arranged on housing 100 120 indoor, as shown in Figure 5.

In exhaust mode, first air-lock 410 is opened the lower space of housing 100 from pipeline 200 obstructs, and will be directed in the pipeline 200, as shown in Figure 6 from the air that fan 330 is discharged.In addition, the 4th air-lock 440 cuts out outlet 120 and opens inlet 110, as shown in Figure 6 and Figure 7.When fan unit 300 work, room air flows into housing 100 by the inlet in the side that is arranged on housing 100 110, and is disposed to outdoor by the 3rd flow channel 3, shared inlet 311, upper space and pipeline 200.

As mentioned above, in ventilating system of the present invention, single fan unit is used for outdoor air is provided to indoor or room air is expelled to outdoor.In addition, according to the present invention, single pipeline is connected to its housing, alternately to provide or to discharge air.Therefore, than traditional ventilating system, the present invention can provide small-sized and not expensive ventilating system.In addition, than the tradition ventilation system with a plurality of fans, the present invention can reduce the noise and the power consumption of fan.And ventilating system of the present invention has heater and filter.Therefore,, also can provide the air that is heated to proper temperature, and the air that is cleaned can be provided to indoor, thereby comfortable indoor environment is provided even in the winter time.

Previous embodiment only is exemplary, is not limited to the present invention.Instruction of the present invention can easily be applied to the device of other type.Specification of the present invention is illustrative, is not limited to the scope of claims.Various replacements, modification and change all are conspicuous for those skilled in the art.

Claims

1. A ventilation system comprising:

a housing having an inlet and an outlet in fluid communication with the chamber;

a first flow passage fluidly communicates the housing with the exterior;

a second flow channel fluidly communicating the outlet with the first flow channel, the second flow channel being disposed within the housing;

a third flow channel fluidly communicating the inlet with the first flow channel, the third flow channel being disposed within the housing;

a fan unit having a single fan that sucks indoor air through the third flow passage and discharges it outdoors through the first flow passage, or sucks outdoor air through the first flow passage and the second flow passage and supplies it indoors, the fan unit is disposed inside the casing; and

The first air lock alternately opens the second flow channel and the third flow channel, and the first air lock is arranged between the outdoor and the fan unit.

2. The system of claim 1, wherein the fan unit sucks in air axially and discharges it radially.

3. The system of claim 1, wherein the housing is disposed in the ceiling.

4. The system of claim 1, wherein the second flow passage and the third flow passage are in fluid communication with each other inside the housing, and the fan unit is mounted to flow through the second flow passage and the third flow passage. The points at which the channels are connected in fluid communication with each other draw in air.

5. The system of claim 1, wherein the fan unit comprises:

A volute is arranged inside the housing, and the single fan is arranged inside the volute;

A common inlet through which the outdoor air flowing through the second flow passage or the indoor air flowing through the third flow passage flows in, and the common inlet is arranged in the volute;

a first outlet in fluid communication with the outlet of the housing and disposed within the volute; and

A second outlet, in fluid communication with the first flow passage, is disposed within the volute.

6. The system of claim 5, wherein the fan axially sucks inflowing air through the common inlet, and then discharges it radially toward the first outlet and the second outlet.

7. The system of claim 5, wherein the common inlet is arranged such that it is in fluid communication with the connecting portion of the first flow channel and the second flow channel and the inlet of the housing.

8. The system according to claim 1, further comprising a partition dividing the inner space of the casing into two spaces, the partition being provided inside the casing, wherein the fan unit is installed in such a manner that , which is installed in either of the two spaces, and sucks air inside the other space and discharges it into either of the two spaces.

9. The system of claim 1, further comprising a second damper selectively opening and closing the inlet, the second damper disposed within the housing.

10. The system of claim 1, further comprising a third damper selectively opening and closing the outlet, the third damper being disposed within the housing.

11. The system of claim 1, further comprising a fourth damper that alternately opens the inlet and the outlet, the fourth damper being disposed within the housing.

12. The system of claim 1, wherein the inlet is provided at the bottom surface of the housing, and the outlet is provided at the side of the housing.

13. The system of claim 1, wherein the inlet is disposed on a lower side of the housing, and the outlet is disposed on an upper side of the housing.

14. The system of claim 1, further comprising a heater for heating the outdoor air supplied to the room, the heater being disposed in the first flow passage.

15. The system of claim 1, further comprising a filter to purify outdoor air supplied to the room, the filter being disposed in the second flow path.

16. A ventilation system comprising:

ducting fluidly communicates the housing with the outdoors and alternately directs outdoor air to the housing or indoor air inside the housing to the outdoors;

a fan unit having a single fan that sucks air entering the housing through the inlet or the duct and then exhausts it toward the outlet and the duct, the fan unit being disposed inside the housing; and

The first air lock alternately blocks the indoor air exhausted from the single fan of the fan unit to the duct or the outdoor air supplied from the duct to the fan unit, the first air lock is arranged between the duct and the fan unit between.

17. The system of claim 16, wherein the fan unit comprises:

a common inlet, in fluid communication with the inlet of the housing and the duct, through which the single fan draws air and subsequently discharges it;

a first outlet directing air exhausted from the fan into an outlet of the housing; and

The second outlet guides the air discharged from the fan into the duct.

18. The system of claim 16, further comprising a partition disposed inside the casing, wherein the partition divides the interior space of the casing into two spaces, and air passes through one of the two spaces One enters the fan unit and exits the fan unit through the other.

19. The system of claim 18, wherein the first damper is installed on the partition to alternately close the two spaces divided by the partition.

20. The system of claim 16, further comprising at least one additional damper that individually or alternately closes the inlet and the outlet of the housing.

21. A ventilation system comprising:

a housing including an inlet and an outlet in fluid communication with the chamber; a lower volume in fluid communication with the inlet; an upper volume in fluid communication with the outlet; and a common inlet in fluid communication with the upper volume and the lower volume;

pipelines, making the upper space and the lower space of the shell communicate with the outdoor fluid;

a single fan that sucks in air from the lower space and discharges it toward the upper space that is in fluid communication with the duct and the outlet, the fan being disposed inside the housing; and

A first air lock makes the duct fluidly communicate with the upper space or the lower space alternately, and the first air lock is arranged between the outdoor and the fan.