CN106193539A - A kind of fire prevention flow-guiding type flue and gas extraction system - Google Patents
A kind of fire prevention flow-guiding type flue and gas extraction system Download PDFInfo
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- CN106193539A CN106193539A CN201610756698.9A CN201610756698A CN106193539A CN 106193539 A CN106193539 A CN 106193539A CN 201610756698 A CN201610756698 A CN 201610756698A CN 106193539 A CN106193539 A CN 106193539A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F17/00—Vertical ducts; Channels, e.g. for drainage
- E04F17/04—Air-ducts or air channels
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- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The present invention relates to smokejack technical field, especially relate to a kind of fire prevention flow-guiding type flue and gas extraction system, including: flue, described flue is divided into the first pipeline and second pipe by voltage stabilizing flow distribution plate, the setting of second pipe can reduce the discharge airflow space in the first pipeline, discharges the flow velocity of air-flow in increasing the first pipeline；It is provided with splitter box in described first pipeline, second pipe is internally provided with injection groove, described splitter box and the intercommunication between the plate of voltage stabilizing flow distribution plate of injection groove, formation injection is interval, fraction in first pipeline can be diverted in second pipe by described injection interval, thus the air-flow in the first pipeline is carried out release of pressure, there is the function of shunting injection, contribute to air-flow and accelerate discharge；Described air inlet and splitter box are arranged on same pipe interior, and air inlet communicates with the discharge duct of indoor mechanical forced-ventilated equipment simultaneously；Solve the very difficult technical problem effectively discharged of waste gas present in prior art.
Description
Technical field
The present invention relates to smokejack technical field, especially relate to a kind of fire prevention flow-guiding type flue and gas extraction system.
Background technology
The smokejack of multistoried housing construction has three types, i.e. in major-minor flue, reverse-filling check (non-return) valve flue and pressure swing type
High-rise flue, but at present, kitchen, defends in the technology of gas extraction system, and resident family can only rely on oneself fume exhauster for kitchen or toilet to change
Gas fan machinery forced-ventilated, is discharged into outdoor by unclean to kitchen or toilet air, carries out room ventilation ventilation.
Owing to the gas extraction system of existing technology is after indoor exhaust air is entered gas extraction system by range hood or ventilation fan, row
The intrasystem waste gas of gas can not be dredged in time and be emitted into ambient atmosphere layer, causes range hood or ventilation fan to increase power consumption, simultaneously
Reduce the capacity in gas extraction system, thus cause house kitchen, defend the use space becoming a kind of morbid state；And in the market
Also not having a kind of exhaust passage system can effectively solve these problems, the blank existed in causing the industry fails to be filled out all the time
Mend.
Summary of the invention
The fire prevention flow-guiding type flue that it is an object of the invention to provide and gas extraction system, to solve to exist in prior art to give up
Gas is difficult to the technical problem of effectively discharge.
The fire prevention flow-guiding type flue that the present invention provides, including: flue, described flue is divided into the first pipe by voltage stabilizing flow distribution plate
Road and second pipe, the setting of second pipe can reduce the discharge airflow space in the first pipeline, increases row in the first pipeline
The flow velocity of bleed flow；
Being provided with splitter box in described first pipeline, second pipe is internally provided with injection groove, described splitter box and injection
Groove intercommunication between the plate of voltage stabilizing flow distribution plate, forms injection interval, and described injection interval can be by the fraction in the first pipeline
It is diverted in second pipe, thus the air-flow in the first pipeline is carried out release of pressure, there is the function of shunting injection, contribute to air-flow
Accelerate discharge；
Being provided with air inlet on described first pipeline, described air inlet and splitter box are arranged on same pipe interior, with
Time air inlet communicate with the discharge duct of indoor mechanical forced-ventilated equipment；
When indoor mechanical forced-ventilated opening of device, the waste gas indoor by machinery forced-ventilated equipment extraction, by air inlet to the
Aerofluxus in one pipeline, and by injection is interval, portion discharge is sent into second pipe, increase exhaust velocity.
Further, described splitter box is lower openings, top plugging structure, improve the first pipeline by injection interval to
Second pipe carries out air-flow velocity and the flow shunted；
Described injection groove is upper opening, bottom plugging structure, makes the first pipeline be entered to second pipe by injection interval
The air-flow of row shunting remains and upwards discharges, it is to avoid with the discharge air-flow in second pipe after splitting streams entrance second pipe
Form convection current, utilize the dynamic pressure of splitting streams higher than the dynamic pressure of discharge air-flow in second pipe simultaneously, make splitting streams to second
Discharge air-flow in pipeline forms injection upwards, improves flow velocity and the flow of air-flow in second pipe.
Further, described first pipe interior is provided with speedup flow guiding structure, described speedup flow guiding structure and splitter box
Be arranged on the same side of voltage stabilizing flow distribution plate, described speedup flow guiding structure object gas flow to side be provided with slope, with reduce
The airflow exits space of speedup flow guiding structure position；
It is interval that described speedup flow guiding structure and the first inner-walls of duct form drain, makes air-flow through drain interval, increases
Big air-flow velocity, reduces pressure；
It is provided with air inlet on the first pipe wall at described drain interval.
Further, it is provided with flow-guiding structure at described air inlet, it is ensured that the flow direction of air-flow and air flow direction phase in flue
With, it also avoid the gas leak within flue simultaneously.
Further, described flow-guiding structure is " L " shape bend pipe, or guiding gutter, or later stage list one-body molded with flue
Solely install.
Further, described splitter box and injection groove all include the first baffle plate and second baffle, described first baffle plate and
The angle formed between two baffle plates is 90 °～160 °, wherein, utilizes the angle of splitter box to eliminate because of splitter box top closure institute shape
The aerofluxus dead angle become, it is to avoid in the first pipeline, discharge air-flow forms local eddy currents in this position；The angle utilizing injection groove eliminates
Because injection groove bottom blocks the aerofluxus dead angle formed, it is to avoid the discharge air-flow in second pipe forms whirlpool, local in this position
Stream；
Described first baffle plate includes that the first swash plate and the second swash plate, described second swash plate with the angle of voltage stabilizing flow distribution plate are
20 °～90 °, the angle of the first swash plate and the second swash plate is 90 °～180 °, it is to avoid air-flow circles round, and makes air current flow more unimpeded.
Further, the height of described splitter box and injection groove is below the height of described voltage stabilizing flow distribution plate, and difference in height
For 10mm～300mm, between the i.e. second swash plate and the inner surface of flue, there is the spacing of 10mm～300mm；Wherein, splitter box is high
The setting of degree can increase the emission quotas of air-flow, makes the air-flow on top, position form injection upwards, setting of injection groove height
Put the injection space upwards that can increase splitting streams, strengthen injection throughput, the final flow velocity improving discharge air-flow and stream
Amount.
Further, described speedup flow guiding structure and flue are split-type structural or are integral type structure with flue；Described
Speedup flow guiding structure is set to one side slope or the tabular on two-sided slope or block structure.
Further, being provided with fire resisting damper at described air inlet, described fire resisting damper and flow-guiding structure are integral type structure, structure
Become deflector type fire-resisting damper.
The present invention also provides for a kind of gas extraction system, including multiple fire prevention flow-guiding type flues；Multiple described fire prevention flow-guiding type cigarettes
Vertically it is sequentially connected with between road, and is provided with blast cap at the fire prevention flow-guiding type flue outlet of top.
The invention have the benefit that
This fire prevention flow-guiding type flue structure is simple, preparation is convenient, has the flow direction guiding air-flow, prevents the excellent of smoke blowing taint of odour
Point.
For gas extraction system, when certain layer of mechanical forced-ventilated opening of device, utilize the mechanical forced-ventilated equipment of this floor by room
When interior waste gas carries out mandatory discharge in the first pipeline, produce dynamic pressure in the first pipeline, utilize the shunting gas in the first pipeline
The dynamic pressure of stream, higher than the dynamic pressure of discharge air-flow in second pipe, makes splitting streams form the discharge air-flow in second pipe upwards
Injection, it is ensured that floor air-flow remains mobility upwards, thus improves the capacity of flue gas.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The front view of the fire prevention flow-guiding type flue that Fig. 1 provides for the embodiment of the present invention；
Fig. 2 is top view based on the fire prevention flow-guiding type flue described in Fig. 1；
Fig. 3 is side view based on the fire prevention flow-guiding type flue described in Fig. 1；
Fig. 4 is axonometric chart based on the fire prevention flow-guiding type flue described in Fig. 1；
Fig. 5 is based on the fire prevention flow-guiding type flue splitter box described in Fig. 1 and the axonometric chart of injection groove；
Fig. 6 is based on the fire prevention flow-guiding type flue splitter box described in Fig. 1 and the top view of injection groove；
Fig. 7 is based on the fire prevention flow-guiding type flue splitter box described in Fig. 1 and the front view of injection groove；
Fig. 8 is structural representation based on the fire prevention flow-guiding type fire-proof valve for flue described in Fig. 1；
Prevent fires flow-guiding type flue and the structural representation of gas extraction system that Fig. 9 provides for the present invention；
Reference:
1-air inlet；2-fire resisting damper；
3-blast cap；4-voltage stabilizing flow distribution plate；
5-speedup flow guiding structure；
6A-the first pipeline；6B-second pipe；
7A-injection groove；7B-splitter box；
8-injection is interval；9-drain is interval；
11-flow guiding structure；71-the first baffle plate；
72-second baffle；711-the first swash plate；
712-the second swash plate.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described, it is clear that described enforcement
Example is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertically ",
Orientation or the position relationship of the instruction such as " level ", " interior ", " outward " they are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplifying describe rather than instruction or the hint device of indication or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicate or hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, can understand that above-mentioned term is at this with concrete condition
Concrete meaning in invention.
Below by specific embodiment and combine accompanying drawing the present invention is described in further detail.
The present invention provides the fire prevention flow-guiding type flue that a kind of exhaust emissions effects is good, including: flue, described flue is by voltage stabilizing
Flow distribution plate is divided into the first pipeline and second pipe, and it is empty that the setting of second pipe can reduce the discharge air-flow in the first pipeline
Between, discharge the flow velocity of air-flow in increasing the first pipeline；
Being provided with splitter box in described first pipeline, second pipe is internally provided with injection groove, described splitter box and injection
Groove intercommunication between the plate of voltage stabilizing flow distribution plate, forms injection interval, and described injection interval can be by the fraction in the first pipeline
It is diverted in second pipe, thus the air-flow in the first pipeline is carried out release of pressure, there is the function of shunting injection, contribute to air-flow
Accelerate discharge；
Being provided with air inlet on described first pipeline, described air inlet and splitter box are arranged on same pipe interior, with
Time air inlet communicate with the discharge duct of indoor mechanical forced-ventilated equipment；
When indoor mechanical forced-ventilated opening of device, the waste gas indoor by machinery forced-ventilated equipment extraction, by air inlet to the
Aerofluxus in one pipeline, and by injection is interval, portion discharge is sent into second pipe, increase exhaust velocity.
As shown in Fig. 1～8, the fire prevention flow-guiding type flue that the present embodiment provides, including: flue, described flue is divided by voltage stabilizing
Stream plate 4 is divided into the first pipeline 6A and second pipe 6B, and the setting of second pipe 6B can reduce the discharge in the first pipeline 6A
Airflow space, discharges the flow velocity of air-flow in increasing the first pipeline 6A；
It is provided with splitter box 7B, second pipe 6B in first pipeline 6A be internally provided with injection groove 7A, splitter box 7B and draw
The length penetrating groove 7A is identical, is 100mm～2000mm, splitter box 7B the most identical with the thickness of injection groove 7A, be 5mm～
30mm；
Splitter box 7B and injection groove 7A intercommunication between the plate of voltage stabilizing flow distribution plate 4, form injection interval 8, wherein splitter box 7B
Identical to the ultimate range of voltage stabilizing flow distribution plate 4 with injection groove 7A to the ultimate range of voltage stabilizing flow distribution plate 4, it is 50mm～300mm；
And a length of 50mm～300mm in injection interval 8, it is possible to the fraction in the first pipeline 6A is diverted to second pipe 6B
In, thus the air-flow in the first pipeline 6A is carried out release of pressure, there is the function of shunting injection, contribute to air-flow and accelerate discharge；
Being provided with air inlet 1 on first pipeline 6A, air inlet 1 and splitter box 7B are arranged on same pipe interior, simultaneously
Air inlet 1 communicates with the discharge duct of indoor mechanical forced-ventilated equipment.
In the alternative of the present embodiment, splitter box 7B is lower openings, top plugging structure, improves the first pipeline 6A and leads to
Cross air-flow velocity and flow that injection interval 8 carries out shunting to second pipe 6B；
Injection groove 7A is upper opening, bottom plugging structure, makes the first pipeline 6A by injection interval 8 to second pipe 6B
The air-flow carrying out shunting remains and upwards discharges, it is to avoid with the row in second pipe 6B after splitting streams entrance second pipe 6B
Bleed flow forms convection current, utilizes the dynamic pressure of splitting streams higher than the dynamic pressure of discharge air-flow in second pipe 6B simultaneously, makes shunting gas
Flow and the discharge air-flow in second pipe 6B is formed injection upwards, improve flow velocity and the flow of air-flow in second pipe 6B.
In the alternative of the present embodiment, the first pipeline 6A is internally provided with speedup flow guiding structure 115, speedup flow guiding structure
115 are arranged on the same sides of voltage stabilizing flow distribution plate 4 with splitter box 7B, speedup flow guiding structure 115 object gas flow come to side arrange
Have slope, to reduce the airflow exits space of speedup flow guiding structure 115 position, wherein, speedup flow guiding structure 115 by flat board and
Slope is 91 °～179 ° of angles compositions, wherein, a length of 100mm～990mm of flat board, the length of flat board and the length on slope
Sum is less than 1000mm；
Speedup flow guiding structure 115 and the first pipeline 6A inwall form drain interval 9, make air-flow through drain interval 9 time,
Increase air-flow velocity, reduce pressure；Wherein speedup flow guiding structure 115 and flue are split-type structural or are integral type knot with flue
Structure；Described speedup flow guiding structure 115 is set to one side slope or the tabular on two-sided slope or block structure；At drain interval
It is provided with air inlet 1 on one pipeline 6A tube wall.
In the alternative of the present embodiment, at air inlet 1, it is provided with flow-guiding structure, it is ensured that the flow direction of air-flow and gas in flue
Stream flows to identical, it also avoid the gas leak within flue simultaneously；
Flow-guiding structure can use the bend pipe of " L " shape structure, it would however also be possible to employ the bend pipe of other shapes or guiding gutter, water conservancy diversion
Structure can be one-body molded with flue, it is also possible to the later stage is separately installed fixing.
In the alternative of the present embodiment, splitter box 7B and injection groove 7A may be arranged as arcuate groove, semi-circular groove and
The structures such as irregular polygon, it is possible to realize injection shunting, do not make air-flow be whirled up；
Splitter box 7B and injection groove 7A all includes the first baffle plate 71 and second baffle 72, the first baffle plate 71 and second baffle 72
Between the angle that formed be 90 °～160 °, utilize the angle of splitter box 7B to eliminate because splitter box 7B top blocks the row that formed
Die with rage angle, it is to avoid in the first pipeline 6A, discharge air-flow forms local eddy currents in this position；Utilize injection groove 7A angle eliminate because of
Injection groove 7A bottom blocks the aerofluxus dead angle formed, it is to avoid the discharge air-flow in second pipe 6B forms whirlpool, local in this position
Stream；
First baffle plate 71 includes the first swash plate 711 and the second swash plate 712, the second swash plate 712 and the angle of voltage stabilizing flow distribution plate 4
Being 20 °～90 °, the angle of the first swash plate 711 and the second swash plate 712 is 90 °～180 °, it is to avoid air-flow circles round, and makes air current flow
More unimpeded.
In the alternative of the present embodiment, the height of splitter box 7B and injection groove 7A is below the height of voltage stabilizing flow distribution plate 4,
And difference in height is 10mm～300mm, between the i.e. second swash plate 712 and the inner surface of flue, there is the spacing of 10mm～300mm；Point
The setting of chute 7B height can increase the emission quotas of air-flow, makes the air-flow on top, position form injection upwards, injection groove
The setting of 7A height can increase the injection space upwards of splitting streams, strengthens injection throughput, and final raising discharges air-flow
Flow velocity and flow.
In the alternative of the present embodiment, being provided with fire resisting damper 2 at air inlet 1, fire resisting damper 2 and flow-guiding structure are integral type
Structure, constitutes deflector type fire-resisting damper 2；To the air inlet 1 being in drain interval 9, it is possible to form jet ejector action, make fire prevention
Produce negative pressure in valve 2, effectively solve smoke blowing taint of odour cross-contamination issue.
As it is shown in figure 9, the present invention also provides for a kind of gas extraction system, including multiple fire prevention flow-guiding type flues；Multiple described anti-
Vertically it is sequentially connected with between fire flow-guiding type flue, and is provided with blast cap 3 at the fire prevention flow-guiding type flue outlet of top.
When certain layer of mechanical forced-ventilated opening of device, utilize the mechanical forced-ventilated equipment of this layer by indoor exhaust air to the first pipeline 6A
When inside carrying out mandatory discharge, produce dynamic pressure in the first pipeline 6A, utilize the dynamic pressure of the splitting streams in the first pipeline 6A to be higher than
The dynamic pressure of discharge air-flow in second pipe 6B, makes splitting streams that the discharge air-flow in second pipe 6B is formed injection upwards,
Ensure that floor air-flow remains mobility upwards, thus improve the capacity of flue gas.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on
So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered
Row equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a fire prevention flow-guiding type flue, including: flue, it is characterised in that described flue is divided into first by voltage stabilizing flow distribution plate
Pipeline and second pipe；
Being provided with splitter box in described first pipeline, second pipe is internally provided with injection groove, described splitter box and injection groove and exists
Intercommunication between the plate of voltage stabilizing flow distribution plate, forms injection interval, and described injection is interval can be shunted the fraction in the first pipeline
In second pipe, thus the air-flow in the first pipeline is carried out release of pressure, there is the function of shunting injection；
Being provided with air inlet on described first pipeline, described air inlet and splitter box are arranged on same pipe interior, enter simultaneously
QI KOU communicates with the discharge duct of indoor mechanical forced-ventilated equipment.
Fire prevention flow-guiding type flue the most according to claim 1, it is characterised in that described splitter box is lower openings, top
Plugging structure, improves the first pipeline by interval air-flow velocity and the flow carrying out to second pipe shunting of injection；
Described injection groove is upper opening, bottom plugging structure, makes the first pipeline carry out point to second pipe by injection is interval
The air-flow of stream remains and upwards discharges, it is to avoid splitting streams is formed with the discharge air-flow in second pipe after entering second pipe
Convection current, improves flow velocity and the flow of air-flow in second pipe.
Fire prevention flow-guiding type flue the most according to claim 1, it is characterised in that described first pipe interior is provided with speedup
Flow guiding structure, described speedup flow guiding structure and splitter box are arranged on the same side of voltage stabilizing flow distribution plate, described speedup flow guiding structure face
To air-flow to side be provided with slope, to reduce the airflow exits space of speedup flow guiding structure position；
It is interval that described speedup flow guiding structure and the first inner-walls of duct form drain, makes air-flow through drain interval, increases gas
Stream flow velocity；
It is provided with air inlet on the first pipe wall at described drain interval.
Fire prevention flow-guiding type flue the most according to claim 1, it is characterised in that be provided with water conservancy diversion knot at described air inlet
Structure, it is ensured that the flow direction of air-flow is identical with air flow direction in flue, it also avoid the gas leak within flue simultaneously.
Fire prevention flow-guiding type flue the most according to claim 4, it is characterised in that described flow-guiding structure is " L " shape bend pipe, or
Person is guiding gutter, one-body molded with flue or the later stage is separately installed.
Fire prevention flow-guiding type flue the most according to claim 1, it is characterised in that described splitter box and injection groove all include
One baffle plate and second baffle, the angle formed between described first baffle plate and second baffle is 90 °～160 °, utilizes splitter box
Angle eliminates because the angle of the closure of splitter box top and injection groove eliminates because injection groove bottom blocks the aerofluxus dead angle formed；
Described first baffle plate includes the first swash plate and the second swash plate, the angle of described second swash plate and voltage stabilizing flow distribution plate be 20 °～
90 °, the angle of the first swash plate and the second swash plate is 90 °～180 °, it is to avoid air-flow circles round, and makes air current flow more unimpeded.
Fire prevention flow-guiding type flue the most according to claim 6, it is characterised in that the height of described splitter box and injection groove is equal
Less than the height of described voltage stabilizing flow distribution plate, and difference in height is 10mm～300mm, deposits between the i.e. second swash plate and the inner surface of flue
Spacing at 10mm～300mm；Improve flow velocity and the flow of discharge air-flow.
Fire prevention flow-guiding type flue the most according to claim 3, it is characterised in that described speedup flow guiding structure and flue are for dividing
Body formula structure or be integral type structure with flue；Described speedup flow guiding structure be set to one side slope or the tabular on two-sided slope or
Block structure.
Fire prevention flow-guiding type flue the most according to claim 4, it is characterised in that be provided with fire resisting damper at described air inlet,
Described fire resisting damper and flow-guiding structure are integral type structure, constitute deflector type fire-resisting damper.
10. a gas extraction system, it is characterised in that include the fire prevention flow-guiding type cigarette described in multiple any one of claim 1～9
Road；Vertically it is sequentially connected with between multiple described fire prevention flow-guiding type flues, and sets at the fire prevention flow-guiding type flue outlet of top
It is equipped with blast cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610756698.9A CN106193539B (en) | 2016-08-29 | 2016-08-29 | A kind of fire prevention flow-guiding type flue and exhaust system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610756698.9A CN106193539B (en) | 2016-08-29 | 2016-08-29 | A kind of fire prevention flow-guiding type flue and exhaust system |
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| Publication Number | Publication Date |
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| CN106193539A true CN106193539A (en) | 2016-12-07 |
| CN106193539B CN106193539B (en) | 2019-06-18 |
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| CN201610756698.9A Active CN106193539B (en) | 2016-08-29 | 2016-08-29 | A kind of fire prevention flow-guiding type flue and exhaust system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112221270A (en) * | 2020-09-03 | 2021-01-15 | 安徽省嘉瑞医药科技有限公司 | Circulating dust removal device for medical breathing bag production |
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| CN2697205Y (en) * | 2004-04-07 | 2005-05-04 | 岳克明 | Flow guiding type ventilation duct for kitchen or toilet |
| CN201258585Y (en) * | 2008-07-21 | 2009-06-17 | 葛福祥 | Self-discharging energy-conserving pressure changing exhaust passage |
| CN205935556U (en) * | 2016-08-29 | 2017-02-08 | 北京顺天佑金茂建筑材料有限公司 | Fire prevention water conservancy diversion formula flue and exhaust system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB519122A (en) * | 1938-09-15 | 1940-03-18 | Harold George Dyke | Improvements relating to chimneys and ventilating shafts |
| CN2594375Y (en) * | 2002-06-18 | 2003-12-24 | 济南市历城区东郊第一建筑安装工程公司 | Shared exhaust passages for residential buildings |
| CN2612758Y (en) * | 2003-04-22 | 2004-04-21 | 葛福祥 | Pressure changing air exhaust passage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112221270A (en) * | 2020-09-03 | 2021-01-15 | 安徽省嘉瑞医药科技有限公司 | Circulating dust removal device for medical breathing bag production |
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| Publication number | Publication date |
|---|---|
| CN106193539B (en) | 2019-06-18 |
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