CN100585288C - Exhaust structure for clothes dryer in apartment building - Google Patents

Abstract

The present invention relates to an exhaust structure for a clothes dryer in an apartment building. The exhaust structure includes at least one riser pipe mounted in a vertical direction crossing every floor of a building, a plurality of branch pipes branched from the riser pipe to a household in the every floor to guide exhaust gas from the household to the riser pipe, a lint filter provided in each of the plurality of branch pipes to filter lint included in the exhaust gas, a first pressure sensor provided in front of the lint filter to sense a pressure in each of the plurality of branch pipes, and a filter controller to determine whether the lint filter is blocked, by receiving a value of the pressure sensed by the first pressure sensor.

Description

The exhaust structure that is used for the dryer of apartment

The application requires the priority of korean patent application No.10-2006-0110150 that applied on November 8th, 2006 and the korean patent application No.10-2006-0110193 that applied on November 8th, 2006, their full contents are hereby incorporated by, as they all are documented in this.

Technical field

The present invention relates to a kind ofly be used for dryer emission gases from each family in apartment, especially high-rise apartment building building to the structure of building outside be applicable to this exhaust structure and the dryer made.More specifically, the present invention relates to be applicable to the exhaust structure from the dryer emission gases, it has been considered from the characteristic of the gas of dryer discharge.

Background technology

In the big city, apartment becomes a kind of general residence form at present.Usually, most of apartment has 15 layers or floor still less.But, also built at present above 20 layers even 30 to 40 layers or higher apartment.

In the apartment of low floor, conventional gas discharge structure does not have serious problem.Even existing problems solve thereby also can make in some fresh air inlet chambers by opeing the window in each family.

But then there are different situations in the high-rise apartment building building.At the low floor of building since with the friction on ground, various barrier building etc. for example, wind speed is low.On the other hand, at the higher floor of building, it is higher that wind speed becomes because with the friction on ground or barrier for example the influence of building weaken.

In addition, at the higher floor of building, eddy current is strengthened.In other words since around the building high level rarer barrier, the wind of bump high-rise climbs or flows at top of building at building wall.When wind when building wall climbs or flow above building, it is faster that wind speed becomes, even form eddy current.Because the phenomenon of above-mentioned wind, in the high floor of high-rise, be difficult to make ventilation of room by opeing the window.

Therefore, as the structure of each family's emission gases from the high-rise apartment building building, provide with vertical direction that each floor intersects on riser of installing and the one or more arms that are connected each family and riser.The food odors that is produced by the kitchen is discharged to riser by the air vent that is arranged in the kitchen via arm, and the gas in the bathroom is discharged into riser via arm from the bathroom by the air vent that is arranged in the bathroom ceiling.The unpowered fan that rotates by wind is installed in above the top of riser.Unpowered fan helps gas to be discharged into the building outside from riser.

But the high wind that rushes at riser top steam vent in the high-rise apartment building building has disturbed gas by the smooth discharge of unpowered fan by riser.

In addition, because in the high-rise apartment building building, make ventilation of room very difficult, drying machine is set usually by opeing the window.In drying machine, the drying machine that can produce hot-air by combustion fuel also produces the harmful exhaust that comprises CO gas except producing common exhaust.Therefore, waste gas can not be discharged to such an extent as to conventional high-rise apartment building building has problems.

And conventional exhaust structure is not suitable for from the drying machine discharging waste gas, and the characteristics of described waste gas are to comprise a large amount of moistures, a large amount of impurity carbon monoxide that for example line is considered to be worth doing and harmful substance for example produces when producing hot-air by combustion fuel.Further, conventional exhaust structure is not suitable for dryer, because dryer work really long days and generation large quantity of exhaust gas.

Summary of the invention

Therefore, the present invention relates to a kind of exhaust structure that is used for the dryer of apartment, it is eliminated substantially because the limitation of prior art and one or more problems that defective causes.

The purpose of this invention is to provide a kind of exhaust structure that is used for the dryer of apartment, its drying machine that can be exclusively used in from the high-rise apartment building building is discharged into the outside, building with gas.

Attendant advantages of the present invention, purpose and a feature part propose in the following description and part test according to following content for the personnel with routine techniques will clearly or can be learned from the practice of the present invention.The objectives and other advantages of the present invention can realize by the structure of specifically noting in this written explanation and claims and accompanying drawing and obtain.

For realize these targets and other advantage and with congruence of the present invention, as implementing at this and the generality explanation, the exhaust apparatus that is used for the dryer of apartment comprises: at least one be installed in the crossing vertical direction of each floor of building on riser; A plurality of arms that from described riser is branched off into the family of each floor, are used for waste gas is directed to from described family described riser; Be arranged on and be used for the line bits filter that bag filter is contained in the line bits of waste gas in each described a plurality of arm; Be arranged on described line bits filter front and be used to detect first pressure sensor at each described a plurality of pipe pressure; Determine that by receiving described line considers whether plugged sereen controller of filter to be worth doing with being used for by the detected force value of first pressure sensor.

In described a plurality of arm at least one is built into the arm that is used for drying machine, it is directed to riser and described filter controller with the dryer of waste gas from be arranged on described family and is arranged on dryer and is installed in wherein the laundry or is arranged in the dryer.

In described a plurality of arm at least one can be built into arm that is used for the kitchen or the arm that is used for the bathroom, and it is connected with the arm that is used for drying machine.

The arm that is used for drying machine can have constant gas capacity air door therein.

Described filter controller can be by comparing to determine measured pressure and reference pressure whether line bits filter stops up.When line bits plugged filter, filter controller can be visually and is acoustically informed subscribers feeder bits plugged filter.

Exhaust structure also can comprise the fan that is arranged on above the riser top, and described fan is by motor-driven.

In described a plurality of arm each can have and is used for preventing the anti-return air door of exhaust gas recirculation and at least one of fire resisting damper therein.

In described a plurality of arm each can have the carbon monoxide filter that is used to filter carbon monoxide therein.

Exhaust structure can also comprise and be arranged on the discharge structure and the open-air pipe that is connected with the riser bottom that is used to discharge the water that forms from the waste gas condensation below the riser that it is communicated with outdoor.

Described a plurality of arm is connected with riser with predetermined downtilt angles.

Be understandable that aforementioned general description of the present invention and following detailed description all are exemplary and indicative, and its purpose is to the invention provides further explanation to what claim was asked for protection.

Description of drawings

Accompanying drawing is introduced into and is used to provide to further understanding of the present invention with in conjunction with a part that constitutes the application in this application, and described accompanying drawing illustrates embodiment of the present invention and is used from explanation principle of the present invention with specification one.In the accompanying drawings:

Fig. 1 is the partial sectional view that illustrates according to the exhaust structure of a preferred embodiment of the present invention.

Fig. 2 is the cutaway view that the syndeton between arm shown in Fig. 1 and the riser is shown.

Fig. 3 is the partial sectional view that the exhaust structure of another preferred embodiment according to the present invention is shown.

Fig. 4 is the schematic diagram that the syndeton of arm shown in Fig. 3 and riser is shown.

Fig. 5 is the schematic diagram that the exhaust structure of another preferred embodiment is shown according to the present invention again.

The specific embodiment

Now will be in detail with reference to the preferred embodiments of the invention, it is relevant with the exhaust structure that is used for the apartment dryer, and its example is shown in the drawings.As possible, in institute's drawings attached, use identical Reference numeral to refer to identical or similar parts.

Fig. 1 is the partial sectional view that illustrates according to the exhaust structure in the apartment of a preferred embodiment of the present invention.

With reference to Fig. 1, apartment is equipped with riser 100 and a plurality of arm 200 from riser 100 each branch of family to apartment that is installed on the vertical direction that intersects with each floor of building.

At this, riser 100 is exclusively used in from dryer 300 to building outside drain waste gas.In other words, apartment can be equipped with several risers to be used for from bathroom and kitchen emission gases.In several risers, the riser 100 shown in Fig. 1 can be arranged for from the riser of dryer 300 emission gases.

Arm 200 is from riser 100 branches and extend to the laundry 350 that is equipped with dryer 300.The steam vent of dryer 300 is connected with the inlet of arm 200 by blast pipe 310.

Fan 140 is installed in above the top of riser 100.Preferably, fan 140 is connected to for example motor (not shown) of power unit.Unpowered fan can be used for by riser 100 gas being discharged into the outside from dryer 300.But the power of unpowered fan may be not enough to large quantity of exhaust gas is discharged from dryer.And because the dryer working time is long and life patterns a plurality of families are similar, a large amount of gases gather the riser from the arm of each family.Therefore, preferably, fan 140 is connected with power unit.

Though do not illustrate, the first pressure sensor (not shown) is installed in the riser 100, and testing result is passed to the electric machine controller (not shown) with the control motor.The installation site of electric machine controller is clearly restriction not.Electric machine controller can be installed near the of motor or in laundry 350.

Open-air pipe 110 is connected the bottom of riser 100, so that riser 100 and outside UNICOM.Discharge structure 120 be installed in open-air pipe 110 below.Exhaust structure 120 is connected with drainpipe 130 so that discharge the condensed water that comprises in the gas from riser 100.

With reference to Fig. 2, arm 200 installed inside be used for preventing gas backstreaming anti-return air door 210, be used for filtering the carbon monoxide filter 220 of carbon monoxide and being used for filtering the line bits filter 230 of line bits from gas from gas.

According to the kind of the heating source that produces hot-air, dryer can be divided into the electronic type dryer and be built into for example dryer of coal or gaseous fuel of combustion fuel.When apartment is equipped with the dryer that is built into combustion fuel, need from the dryer exhaust gas discharged, filters carbon monoxide and discharge the exhaust to riser 100.Otherwise may go wrong enters into family so that comprise the waste gas of carbon monoxide.Consider the living environment of skyscraper, be difficult to therein, prevent that the demand that carbon monoxide enters in the family is bigger by the ventilation of opeing the window.

And preferably, fire resisting damper 240 is installed in the arm 200.This is in order to prevent that the intensity of a fire from spreading to other family by riser 100 and arm 200.

First pressure sensor 232 is installed in online bits filter 230 fronts in arm 200.First pressure sensor 232 can be built into detection signal is passed to the filter controller (not shown) that is arranged on separately in the laundry 350, perhaps is delivered to the filter controller that is arranged in the dryer 300.For example, the holding wire from first pressure sensor 232 can be connected with the controller in being arranged on dryer 300.For this structure, dryer 300 can have a connector (not shown) with from outside received signal.

Below, will be described the air-flow from dryer 300 in the exhaust structure with above-mentioned structure.

The gas of discharging from dryer 300 is discharged into the riser 100 via blast pipe 310 and arm 200.If dryer 300 is built into by combustion fuel and produces hot-air, the waste gas of discharging from dryer 300 may comprise carbon monoxide.Carbon monoxide can be removed by the carbon monoxide filter 220 that is installed in the arm 200.

The line bits that contain in the waste gas are removed by the line bits filter 230 that is installed in the arm 200.

The waste gas that enters riser 100 via arm 200 passes through the top discharge of riser 100 to the building outside.

The fan 140 that is installed in above riser 100 tops is rotated by motor.To the operation of fan 140 be described in detail now.

The inventor finds to utilize pressure the riser 100 by experiment or derive theoretically from the amount of dryer 300 exhaust gas discharged.In other words, by utilizing the pressure that records by second pressure sensor that is installed in the riser 100, can detect from the amount of dryer 300 exhaust gas discharged.And, the rotating speed of fan 140 and be discharged correlation between the amount of gas can be by experiment or derive theoretically.According to above-mentioned correlation, can control the rotating speed of power unit with control fan 140.Can detect the amount of waste gas by the pressure that records by second pressure sensor, and control the rotating speed of fan 140 according to the amount of detected waste gas.

In this case, preferably, the motor (not shown) of forming power unit is controlled so that apply driving force for pro rata fan 140 with the amount that is discharged gas.

Particularly,, detect the amount of waste gas in the riser 100, and determine the driving force of motor according to the amount of detected waste gas if the pressure in the riser 100 is measured by second pressure sensor that is installed in the riser 100.Therefore, if big from the amount of dryer 300 exhaust gas discharged, motor increases the rotating speed of fan 140 to increase exhaust gas discharging speed.

If fan 140 is driven by power unit as mentioned above, the pressure distribution in riser 100 will change according to the rotating speed of amount that is discharged gas and fan 140.Therefore, for emission gases the most swimmingly, preferably, consider that pressure distribution is according to the amount control rotation speed of the fan that is discharged gas.

The inventor has carried out computer simulation according to the rotating speed of fan 140 to the pressure distribution in the riser 100.Simulation is carried out at multiple situation, so that gas is discharged into the outside with the speed of 2m/s, 12m/s and 22m/s from riser 100.

Simulation result shows that when the pressure distribution in the riser 100 equated with the pressure distribution of building outside, waste gas was discharged into the building outside swimmingly.When considering that when highly increasing the outside pressure drop of building and be 4Pa/3m (at this, 3m is substantially equal to the height of building first floor), when gas purging speed was 12m/s, the pressure distribution of pressure distribution in the riser 100 and building outside was the most approaching.

Therefore, motor apply driving force can for fan 140, and thus according to the amount of waste gas in the riser 100, fan 140 can rotate can make the approximate rotating speed of pressure distribution and the pressure distribution of building outside in the riser 100.

Because the waste gas of discharging from dryer 300 comprises a large amount of moistures, moisture is condensed into liquid easily on the inwall of riser 100.The liquid of condensation is past dirty along the inwall of riser 100, and is discharged into the outside via discharge structure 120.Though not shown, discharge structure 120 can comprise catchment part, draining pump, valve and float switch.

The operation of pump can manually be controlled by the user, or control automatically.When the operation of pump was controlled automatically, float switch was installed in the part of catchmenting, and switches when floating to predetermined altitude with convenient buoyancy aid.Float switch can be built into mechanical type or electronic type.For example, when buoyancy aid floats to predetermined altitude, the buoyancy aid switch switches to open valve and operations platoon's water pump.

Because open-air pipe 110 is connected with the bottom of riser 100, waste gas can be more swimmingly from the top discharge of riser 100 to the outside.

Even riser 100 is full of waste gas and internal pressure rising thus, the gas that is back to arm 200 also can stop by the anti-return air door of installing in the arm 200 210, can not enter in the family.

At present because in each family the service time of dryer longer, service time may be overlapping in a plurality of families.In this case, the amount that is discharged into the waste gas in the riser 100 increases, and the pressure in the riser 100 rises, and it causes that the waste gas in the riser 100 is back in each family by arm 200.Anti-return air door 210 is used for preventing that exhaust gas recirculation is to family.

If the line bits filter 230 that is installed in the arm 200 is stopped up by the line bits, the pressure that is recorded by first pressure sensor 232 that online bits filter 230 fronts are set raises.Therefore, the filter controller that is arranged in laundry 350 or the dryer 300 compares pressure and the reference pressure that records, and sounds the alarm or light lamp and change to inform that subscribers feeder bits filter 230 stops up and needs.

Preferably, arm 200 is connected with riser 100 with the predetermined oblique angle that dips down.It is used for preventing that the liquid that is formed by the humidity condensed that is included in waste gas is back to dryer 300 via arm 200, and described liquid is directed to riser 100.

In the time of in the laundry 350 that dryer 300 is installed in each family, the user is connected with arm 200 by the discharge orifice of blast pipe 310 with dryer 300.Therefore, preferably, blast pipe 310 is flexible so that soft crooked.

According to the design needs, line bits filter 230, carbon monoxide filter 220 and anti-return air door 210 can be installed in the arm 200 or be installed in the blast pipe 310.For example, different with previous embodiments, at least one line bits filter 230, carbon monoxide filter 220 and anti-return air door 210 can be installed in the blast pipe 310.When in line bits filter 230, carbon monoxide filter 220 and the anti-return air door 210 at least one was installed in the blast pipe 310, same member did not need to be installed in the arm 200, but identical components is installed in the arm 200 and also has no relations.

If the sellers of dryer 300 are set together blast pipe 310 and dryer 300, blast pipe 310 can wired bits filter 230, carbon monoxide filter 220 and anti-return air door 210 are positioned at wherein.In this case, be equipped with the building of the arm 200 that wherein only has fire resisting damper 240 to provide by building side.But this does not mean that fire resisting damper 240 should be installed in the arm 200 and should not be installed in the blast pipe 310.

According to the shape of arm 200, can not need blast pipe 310.This is because blast pipe 310 can be provided by the builder, and is connected with arm 200 integral body, and the structure in perhaps conventional kitchen or bathroom can be used for blast pipe 310.For example, fan can be installed to the inlet of arm 200, dryer 300 can be installed make the discharge orifice of dryer 300 locate near the inlet of arm 200.In this case, being similar to the structure of the exhaust hood device that uses in the conventional kitchen can be near the inlet setting of arm 200.

With above-mentioned different be to be used for determining that first pressure sensor that whether line bits filter 230 stops up can be arranged on the toxic emission runner of dryer 300.Be built in the situation that produces hot-air by combustion fuel at dryer 300, carbon monoxide filter 220 can be installed in the toxic emission runner of dryer 300.

In addition, anti-return air door 210 also can be arranged in the toxic emission runner of dryer 300.When the discharge orifice of dryer 300 is connected with blast pipe 310 and blast pipe 310 when being connected with arm 200, the anti-return air door 210 that the waste gas that refluxes from riser 100 is installed in the dryer 300 stops, can not enter in the family again.

Fig. 3 is the partial sectional view of expression exhaust structure of another preferred embodiment according to the present invention.The exhaust structure of the present embodiment has such characteristics, that is, be used for being connected with the arm 400 that another arm 400 for example is used for the kitchen from the arm 500 of the drying machine of dryer 300 discharging waste gas.But, the invention is not restricted to said structure.In other words, the arm 500 that is used for drying machine also can be connected with the arm that is used for the bathroom except with the arm 400 that is used for the kitchen is connected.Below, will the difference of the present embodiment and previous embodiments be described.

With reference to Fig. 3, the exhaust structure of the present embodiment comprises that several are from riser 100 branches and extend to the arm 400 and 500 of each family.Some arms are connected to each other.As shown in the figure, the arm 500 that is used for waste gas is directed to from dryer 300 drying machine of riser 100 is connected with the arm that is used for the kitchen 400 that extends from the kitchen.

Fig. 4 is the schematic diagram of the syndeton of arm shown in the presentation graphs 3 and riser.

With reference to Fig. 4, anti-return air door 410 and fire resisting damper 440 are installed in the arm 400 that is used for the kitchen, and carbon monoxide filter 520, line bits filter 530 and constant gas capacity air door 550 are installed in the arm 500 that is used for drying machine.Because it is similar pressure sensor to be provided with the structure and the previous embodiments of online bits filter 530 fronts, with the detailed explanation of omitting to it.

If riser 100 be full of waste gas and thus the pressure in the riser 100 raise, exhaust may be back to arm 400 that is used for the kitchen and the arm 500 that is used for drying machine.But the anti-return air door 410 that is installed in the arm 400 that is used for the kitchen prevents that waste gas from flowing into kitchens from arm 100, and the constant gas capacity air door 550 that is installed in the arm 500 that is used for drying machine prevents that waste gas from flowing into laundrys from riser 100.Similarly, anti-return air door 410 prevents that waste gas from flowing into the kitchen from dryer 300, and constant gas capacity air door 550 prevents that waste gas from flowing into the laundry from the kitchen.

As shown in Figure 4, the arm 400 that is used for the kitchen is connected with riser 100 with predetermined downtilt angles (angle [alpha]).Its liquid that is used for being formed by the humidity condensed that is included in waste gas is directed to riser 100.

Constant gas capacity air door 550 can be installed in the toxic emission runner of dryer 300.When the discharge orifice of dryer 300 is connected with blast pipe 310 and blast pipe 310 when being connected with the arm 500 that is used for drying machine, the constant gas capacity air door 550 that the waste gas that refluxes from riser 100 is installed in the dryer 300 stops, can not enter in the family.

Fig. 5 is the schematic diagram that the exhaust structure of another preferred embodiment is shown according to the present invention again.Be different from previous embodiments, the present embodiment characteristics are that each family is equipped with can be independently from the structure of dryer to outside discharging waste gas.In other words, Fig. 5 illustrates the structure that is used for waste gas is discharged into from the dryer of certain family the outside.

The exhaust structure of the present embodiment comprise be arranged to the building external communications be used for waste gas from dryer be discharged into the building outside blast pipe 600, be used to produce the exhaust fan 620 of off-gas flows and be used to prevent that waste gas from passing through the air door 610 that blast pipe 600 refluxes.At this, blast pipe 600 can be equivalent to blast pipe 310 or the arm 200 in the previous embodiments.

In order swimmingly waste gas to be discharged into the skyscraper outside from dryer, preferably, exhaust fan 620 is built into the variable power fan, and its power changes according to environment for use.In other words, when being used for high-rise family, exhaust fan 620 is controlled with higher-wattage work.Therefore, preferably, at wide power bracket internal linear control variable power fan.Exhaust fan 620 can be arranged in the dryer 300 or in the blast pipe 600.In this case, exhaust fan can be arranged to two.

Preferably, air door 610 is arranged on skin 650, but is not limited to this.For example, air door 610 can be arranged in the dryer 300.

Similarly, preferably, control air door 610 and exhaust fan 620 are worked itself and dryer 300 interlockings ground.For example, when dryer 300 work, air door 610 is opened, and exhaust fan 620 work are with from the drying machine discharging waste gas.On the other hand, when the work of dryer 300 stopped, air door 610 was closed preventing exhaust gas recirculation, and the work of exhaust fan 620 stops.

Exhaust fan 620 and air door 610 can be arranged in the dryer 300.In this case, drying machine self is enough smooth and easy and discharge the exhaust to the outside changeably according to environment for use.Air door in addition, can make up drying machine, so that can prevent exhaust gas recirculation.

And as mentioned above, preferably, blast pipe 600 is installed with predetermined downtilt angles, and the water that will wherein produce swimmingly is discharged into the building outside thus.Also the filter described in the previous embodiments can be set in the present embodiment.

Exhaust structure according to the present invention has the following advantages as mentioned above.

According to the present invention, provide a kind of be applicable to special from apartment, doing in the high-rise apartment building building especially Clothing machine discharging waste gas is to exhaust structure and a kind of dryer that is adapted to this exhaust structure and makes of outside, building.

And, can solve according to exhaust structure of the present invention and to occur in the high-rise apartment building building from the dryer exhaust Emission problem. Especially, also can solve according to exhaust structure of the present invention, owing to the waste gas from the dryer discharging Characteristics, be used for the indeterminable problem of conventional exhaust structure in kitchen and bathroom.

It will be readily apparent to one skilled in the art that in the present invention and can carry out various changes and change Change and do not break away from the spirit and scope of the present invention. Thus, this means that the present invention covers change of the present invention And variation, as long as they fall in the scope of appended claim and equivalent thereof.

Claims (11)

1. exhaust structure that is used for the dryer of apartment comprises:

At least one is installed in the riser on the vertical direction that intersects with each floor of building;

A plurality ofly be branched off into the arm that family each floor is used for waste gas is directed to from described family described riser from described riser;

Be arranged on and be used for the line bits filter that bag filter is contained in the line bits of waste gas in each described a plurality of arm;

Be arranged on described line bits filter front and be used for detecting first pressure sensor at each described a plurality of arm pressure; Be used for determining that by receiving described line considers whether plugged sereen controller of filter to be worth doing by the detected force value of first pressure sensor; With

The open-air pipe that is connected with the riser bottom, described open-air pipe is communicated with outdoor,

Wherein, at least one in described a plurality of arms is built into the arm that is used for dryer, and it is directed to riser with the dryer of waste gas from be arranged on described family.

2. exhaust structure as claimed in claim 1 is characterized in that, described filter controller is arranged on dryer and is installed in wherein the laundry, or is arranged in the dryer.

3. exhaust structure as claimed in claim 1 is characterized in that, described filter controller is by comparing to determine measured pressure and reference pressure whether line bits filter stops up.

4. exhaust structure as claimed in claim 3 is characterized in that, when line bits plugged filter, filter controller visually and is acoustically informed subscribers feeder bits plugged filter.

5. exhaust structure as claimed in claim 1 is characterized in that, also comprises the fan that is arranged on the riser top, and described fan is by motor-driven.

6. exhaust structure as claimed in claim 1 is characterized in that, each in described a plurality of arms have therein be used for preventing the anti-return air door of exhaust gas recirculation and at least one of fire resisting damper.

7. exhaust structure as claimed in claim 1 is characterized in that, each in described a plurality of arms has the carbon monoxide filter that is used to filter carbon monoxide therein.

8. exhaust structure as claimed in claim 1 is characterized in that, also comprises:

Be arranged on the discharge structure that is used to discharge the water that forms from the waste gas condensation below the riser.

9. exhaust structure as claimed in claim 1 is characterized in that, described a plurality of arms are connected with riser with predetermined downtilt angles.

10. exhaust structure as claimed in claim 2 is characterized in that, at least one in described a plurality of arms is built into arm that is used for the kitchen or the arm that is used for the bathroom, and it is connected with the arm that is used for dryer.

11. exhaust structure as claimed in claim 10 is characterized in that, the arm that is used for dryer has constant gas capacity air door therein.

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