CN106193539B - A kind of fire prevention flow-guiding type flue and exhaust system - Google Patents
A kind of fire prevention flow-guiding type flue and exhaust system Download PDFInfo
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- CN106193539B CN106193539B CN201610756698.9A CN201610756698A CN106193539B CN 106193539 B CN106193539 B CN 106193539B CN 201610756698 A CN201610756698 A CN 201610756698A CN 106193539 B CN106193539 B CN 106193539B
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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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Abstract
The present invention relates to smokejack technical fields, more particularly, to a kind of fire prevention flow-guiding type flue and exhaust system, it include: flue, the flue is divided into first pipe and second pipe by pressure stabilizing flow distribution plate, the setting of second pipe can reduce the discharge airflow space in first pipe, increase the flow velocity of discharge air-flow in first pipe；Diversion channel is provided in the first pipe, second pipe is internally provided with injection slot, the intercommunication between the plate of pressure stabilizing flow distribution plate of the diversion channel and injection slot, form injection section, fraction in first pipe can be diverted in second pipe by the injection section, to carry out discharge to the air-flow in first pipe, have the function of shunting injection, facilitates air-flow and accelerate discharge；The air inlet and diversion channel are arranged inside the same pipeline, while air inlet is communicated with the exhaust pipe of indoor mechanical forced-ventilated equipment；It solves exhaust gas existing in the prior art and is difficult the technical issues of effectively discharging.
Description
Technical field
The present invention relates to smokejack technical fields, more particularly, to a kind of fire prevention flow-guiding type flue and exhaust system.
Background technique
There are three types of types for the smokejack of multistoried housing construction, i.e., in major-minor flue, reverse-filling check (non-return) valve flue and pressure swing type
High-rise flue, but currently, kitchen, defend in the technology of exhaust system, resident can only change by oneself fume exhauster for kitchen or toilet
Gas fans mechanical forced-ventilated, and the unclean air in kitchen or toilet is discharged into outdoor, carries out room ventilation ventilation.
Since the exhaust system of existing technology is after indoor exhaust air is discharged into exhaust system by range hood or ventilation fan, row
Exhaust gas in gas system cannot be dredged in time is emitted into ambient atmosphere layer, causes range hood or ventilation fan to increase energy consumption, simultaneously
The capacity into exhaust system is reduced, so as to cause house kitchen, defends a kind of use space as morbid state；And currently on the market
There are no a kind of exhaust passage systems can effectively solve these problems, and existing blank in the industry is caused to fail to be filled out always
It mends.
Summary of the invention
The purpose of the present invention is to provide fire prevention flow-guiding type flue and exhaust system, with solve exist in the prior art it is useless
Gas is difficult the technical issues of effectively discharging.
Fire prevention flow-guiding type flue provided by the invention, comprising: flue, the flue are divided into the first pipe by pressure stabilizing flow distribution plate
Road and second pipe, the setting of second pipe can reduce the discharge airflow space in first pipe, increase row in first pipe
The flow velocity of bleed flow；
Diversion channel is provided in the first pipe, second pipe is internally provided with injection slot, the diversion channel and injection
Slot intercommunication between the plate of pressure stabilizing flow distribution plate forms injection section, and the injection section can be by the fraction in first pipe
It is diverted in second pipe, to carry out discharge to the air-flow in first pipe, has the function of shunting injection, facilitate air-flow
Accelerate discharge；
Air inlet is provided in the first pipe, the air inlet and diversion channel are arranged inside the same pipeline, together
When air inlet communicated with the exhaust pipe of indoor mechanical forced-ventilated equipment；
Indoors when mechanical forced-ventilated opening of device, indoor exhaust gas is extracted by mechanical forced-ventilated equipment, by air inlet to the
Exhaust in one pipeline, and portion discharge is sent by second pipe by injection section, increase exhaust velocity.
Further, the diversion channel be lower openings, top plugging structure, improve first pipe by injection section to
The air-flow velocity and flow that second pipe is shunted；
The injection slot be upper opening, lower part plugging structure, make first pipe by injection section to second pipe into
Row shunt air-flow remain upward discharge, after avoiding splitting streams from entering second pipe with the discharge air-flow in second pipe
Convection current is formed, while being higher than the dynamic pressure of discharge air-flow in second pipe using the dynamic pressure of splitting streams, makes splitting streams to second
Discharge air-flow in pipeline forms upward injection, improves the flow velocity and flow of second pipe interior air-flow.
Further, the first pipe is internally provided with speedup flow guiding structure, the speedup flow guiding structure and diversion channel
The same side of pressure stabilizing flow distribution plate is set, the speedup flow guiding structure object gas flow come to side be provided with slope, to reduce
Airflow exits space at speedup flow guiding structure position；
The speedup flow guiding structure and first pipe inner wall form drainage section, make air-flow when by draining section, increase
Big air-flow velocity reduces pressure；
Air inlet is provided on first pipe tube wall at the drainage section.
Further, it is provided with flow-guiding structure at the air inlet, guarantees that the flow direction of air-flow flows to phase with flue interior air-flow
Together, while the gas leak inside flue is also avoided.
Further, the flow-guiding structure is L shape bend pipe or diversion trench, is integrally formed with flue or the later period is single
Solely installation.
Further, the diversion channel and injection slot include first baffle and second baffle, the first baffle and
The angle formed between two baffles is 90 °~160 °, wherein is eliminated using the angle of diversion channel because diversion channel top blocks institute's shape
At exhaust dead angle, avoid discharge air-flow in first pipe from forming local eddy currents in the position；It is eliminated using the angle of injection slot
It is formed by exhaust dead angle because injection slot lower part blocks, the discharge air-flow in second pipe is avoided to form local whirlpool in the position
Stream；
The first baffle includes the first inclined plate and the second inclined plate, and the angle of second inclined plate and pressure stabilizing flow distribution plate is
20 °~90 °, the angle of the first inclined plate and the second inclined plate is 90 °~180 °, and air-flow is avoided to circle round, and keeps air-flow flowing more unimpeded.
Further, the height of the diversion channel and injection slot is below the height of the pressure stabilizing flow distribution plate, and difference in height
For 10mm~300mm, i.e. there are the spacing of 10mm~300mm between the second inclined plate and the inner surface of flue；Wherein, diversion channel
The setting of height is capable of increasing the emission quotas of air-flow, and the air-flow on position top is made to form upward injection, injection groove height
The upward injection section for being capable of increasing splitting streams is set, increases injection throughput, the final flow velocity for improving discharge air-flow and
Flow.
Further, the speedup flow guiding structure is split type structure with flue or is an integral structure with flue；It is described
Speedup flow guiding structure is set as the plate or block structure on single side slope or two-sided slope.
Further, fire resisting damper is provided at the air inlet, the fire resisting damper is an integral structure with flow-guiding structure, structure
At deflector type fire-resisting damper.
The present invention also provides a kind of exhaust systems, including multiple fire prevention flow-guiding type flues；Multiple fire prevention flow-guiding type cigarettes
It is vertically sequentially connected between road, and is provided with blast cap at the fire prevention flow-guiding type flue outlet of top.
The invention has the benefit that
The fire prevention flow-guiding type flue structure is simple, preparation is convenient, has the flow direction of guidance air-flow, prevents the excellent of smoke blowing taint of odour
Point.
For exhaust system, when certain layer of mechanical forced-ventilated opening of device, using the mechanical forced-ventilated equipment of this floor by room
When interior exhaust gas carries out mandatory discharge into first pipe, dynamic pressure is generated in first pipe, utilizes the shunting gas in first pipe
The dynamic pressure of stream is higher than the dynamic pressure of discharge air-flow in second pipe, forms splitting streams upwards to the discharge air-flow in second pipe
Injection, guarantee floor air-flow remain upward mobility, to improve the capacity of flue gas.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the main view of fire prevention flow-guiding type flue provided in an embodiment of the present invention；
Fig. 2 is the top view based on flow-guiding type flue of preventing fires described in Fig. 1；
Fig. 3 is the side view based on flow-guiding type flue of preventing fires described in Fig. 1；
Fig. 4 is the perspective view based on flow-guiding type flue of preventing fires described in Fig. 1；
Fig. 5 is the perspective view based on prevent fires described in Fig. 1 flow-guiding type flue diversion channel and injection slot；
Fig. 6 is the top view based on prevent fires described in Fig. 1 flow-guiding type flue diversion channel and injection slot；
Fig. 7 is the main view based on prevent fires described in Fig. 1 flow-guiding type flue diversion channel and injection slot；
Fig. 8 is the structural schematic diagram based on flow-guiding type fire-proof valve for flue of preventing fires described in Fig. 1；
Fig. 9 is the structural schematic diagram of fire prevention flow-guiding type flue provided by the invention and exhaust system；
Appended drawing reference:
1- air inlet；2- fire resisting damper；
3- blast cap；4- pressure stabilizing flow distribution plate；
5- speedup flow guiding structure；
6A- first pipe；6B- second pipe；
7A- injection slot；7B- diversion channel；
8- injection section；9- drains section；
11- flow guiding structure；71- first baffle；
72- second baffle；The first inclined plate of 711-；
The second inclined plate of 712-.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
The present invention is described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.
The present invention provides a kind of fire prevention flow-guiding type flue that exhaust emissions effects are good, comprising: flue, the flue is by pressure stabilizing
Flow distribution plate is divided into first pipe and second pipe, and it is empty that the setting of second pipe can reduce the discharge air-flow in first pipe
Between, increase the flow velocity of discharge air-flow in first pipe；
Diversion channel is provided in the first pipe, second pipe is internally provided with injection slot, the diversion channel and injection
Slot intercommunication between the plate of pressure stabilizing flow distribution plate forms injection section, and the injection section can be by the fraction in first pipe
It is diverted in second pipe, to carry out discharge to the air-flow in first pipe, has the function of shunting injection, facilitate air-flow
Accelerate discharge；
Air inlet is provided in the first pipe, the air inlet and diversion channel are arranged inside the same pipeline, together
When air inlet communicated with the exhaust pipe of indoor mechanical forced-ventilated equipment；
Indoors when mechanical forced-ventilated opening of device, indoor exhaust gas is extracted by mechanical forced-ventilated equipment, by air inlet to the
Exhaust in one pipeline, and portion discharge is sent by second pipe by injection section, increase exhaust velocity.
As shown in Fig. 1~8, fire prevention flow-guiding type flue provided in this embodiment, comprising: flue, the flue is by pressure stabilizing point
Flowing plate 4 is divided into first pipe 6A and second pipe 6B, and the setting of second pipe 6B can reduce the discharge in first pipe 6A
Airflow space increases the flow velocity of discharge air-flow in first pipe 6A；
It is provided with diversion channel 7B in first pipe 6A, second pipe 6B is internally provided with injection slot 7A, diversion channel 7B and draws
The length for penetrating slot 7A is identical, be 100mm~2000mm, diversion channel 7B and injection slot 7A thickness it is also identical, be 5mm~
30mm；
Diversion channel 7B and injection slot the 7A intercommunication between the plate of pressure stabilizing flow distribution plate 4 form injection section 8, wherein diversion channel 7B
Maximum distance to pressure stabilizing flow distribution plate 4 is identical with the maximum distance of injection slot 7A to pressure stabilizing flow distribution plate 4, is 50mm~300mm；
And the length in injection section 8 is 50mm~300mm, the fraction in first pipe 6A can be diverted to second pipe 6B
In, to carry out discharge to the air-flow in first pipe 6A, have the function of shunting injection, facilitates air-flow and accelerate discharge；
Air inlet 1 is provided on first pipe 6A, air inlet 1 and diversion channel 7B are arranged inside the same pipeline, simultaneously
Air inlet 1 is communicated with the exhaust pipe of indoor mechanical forced-ventilated equipment.
In the optinal plan of the present embodiment, diversion channel 7B is lower openings, top plugging structure, and it is logical to improve first pipe 6A
Injection section 8 is crossed to the second pipe 6B air-flow velocity shunted and flow；
Injection slot 7A is upper opening, and lower part plugging structure makes first pipe 6A pass through injection section 8 to second pipe
The air-flow that 6B is shunted remains upward discharge, after avoiding splitting streams from entering second pipe 6B and in second pipe 6B
It discharges air-flow and forms convection current, while being higher than the dynamic pressure of discharge air-flow in second pipe 6B using the dynamic pressure of splitting streams, make to shunt
Air-flow forms upward injection to the discharge air-flow in second pipe 6B, improves the flow velocity and flow of second pipe 6B interior air-flow.
In the optinal plan of the present embodiment, first pipe 6A is internally provided with speedup flow guiding structure 5, speedup flow guiding structure 5
The same side of pressure stabilizing flow distribution plate 4 is set with diversion channel 7B, 5 object gas flow of speedup flow guiding structure come to side be provided with tiltedly
Slope, to reduce the airflow exits space at 5 position of speedup flow guiding structure, wherein speedup flow guiding structure 5 is in by plate and slope
91 °~179 ° angles are constituted, wherein the length of plate is 100mm~990mm, and the sum of the length on the length of plate and slope is no
More than 1000mm；
Speedup flow guiding structure 5 and first pipe 6A inner wall form drainage section 9, make air-flow when by draining section 9,
Increase air-flow velocity, reduces pressure；Wherein speedup flow guiding structure 5 and flue are split type structure or are integral type knot with flue
Structure；The speedup flow guiding structure 5 is set as the plate or block structure on single side slope or two-sided slope；Drain the at section
Air inlet 1 is provided on one pipeline 6A tube wall.
In the optinal plan of the present embodiment, it is provided with flow-guiding structure at air inlet 1, guarantees gas in the flow direction and flue of air-flow
Stream flows to identical, while also avoiding the gas leak inside flue；
Flow-guiding structure can use the bend pipe of L shape structure, can also use the bend pipe or diversion trench of other shapes, water conservancy diversion
Structure can be integrally formed with flue, can also be with later period separately installed fixation.
In the optinal plan of the present embodiment, diversion channel 7B and injection slot 7A may be arranged as arc groove, semi-circular groove and
The structures such as irregular polygon can be realized injection shunting, be whirled up air-flow；
Diversion channel 7B and injection slot 7A includes first baffle 71 and second baffle 72, first baffle 71 and second baffle
The angle formed between 72 is 90 °~160 °, is eliminated using the angle of diversion channel 7B and is formed by because the top diversion channel 7B blocks
It is vented dead angle, discharge air-flow in first pipe 6A is avoided to form local eddy currents in the position；It is eliminated using the angle of injection slot 7A
It is formed by exhaust dead angle because the injection lower part slot 7A blocks, the discharge air-flow in second pipe 6B is avoided to form part in the position
Vortex；
First baffle 71 includes the first inclined plate 711 and the second inclined plate 712, the angle of the second inclined plate 712 and pressure stabilizing flow distribution plate 4
It is 20 °~90 °, the angle of the first inclined plate 711 and the second inclined plate 712 is 90 °~180 °, avoids air-flow from circling round, flows air-flow
It is more unimpeded.
In the optinal plan of the present embodiment, the height of diversion channel 7B and injection slot 7A are below the height of pressure stabilizing flow distribution plate 4,
And difference in height is 10mm~300mm, i.e., there are the spacing of 10mm~300mm between the second inclined plate 712 and the inner surface of flue；Point
The setting of chute 7B height is capable of increasing the emission quotas of air-flow, and the air-flow on position top is made to form upward injection, injection slot
The setting of 7A height is capable of increasing the upward injection section of splitting streams, increases injection throughput, final to improve discharge air-flow
Flow velocity and flow.
In the optinal plan of the present embodiment, fire resisting damper 2 is provided 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 in drainage section 9, it is capable of forming jet stream ejector action, makes to prevent fires
Negative pressure is generated in valve 2, effectively solves smoke blowing taint of odour cross-contamination issue.
As shown in figure 9, the present invention also provides a kind of exhaust system, including multiple fire prevention flow-guiding type flues；It is multiple described anti-
It is vertically sequentially connected between fiery 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, using the mechanical forced-ventilated equipment of this layer by indoor exhaust air to first pipe 6A
When the mandatory discharge of interior progress, dynamic pressure is generated in first pipe 6A, the dynamic pressure using the splitting streams in first pipe 6A is higher than
The dynamic pressure of discharge air-flow, makes splitting streams form upward injection to the discharge air-flow in second pipe 6B in second pipe 6B,
Guarantee that floor air-flow remains upward mobility, to improve the capacity of flue gas.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. a kind of fire prevention flow-guiding type flue, comprising: flue, which is characterized in that the flue is divided into first by pressure stabilizing flow distribution plate
Pipeline and second pipe；
Diversion channel is provided in the first pipe, second pipe is internally provided with injection slot, and the diversion channel and injection slot exist
Intercommunication between the plate of pressure stabilizing flow distribution plate forms injection section, and the injection section can shunt the fraction in first pipe
Into second pipe, to carry out discharge to the air-flow in first pipe, have the function of shunting injection；
Air inlet is provided in the first pipe, the air inlet and diversion channel are arranged inside the same pipeline, while into
Port is communicated with the exhaust pipe of indoor mechanical forced-ventilated equipment；
The diversion channel and injection slot include first baffle and second baffle；
The diversion channel is lower openings, top plugging structure, improves first pipe and is carried out by injection section to second pipe
The air-flow velocity and flow of shunting；
The injection slot is upper opening, and lower part plugging structure divides first pipe to second pipe by injection section
The air-flow of stream remains upward discharge, is formed after avoiding splitting streams from entering second pipe with the discharge air-flow in second pipe
Convection current improves the flow velocity and flow of second pipe interior air-flow；
The angle formed between the first baffle and second baffle is 90 °~160 °, and the first baffle includes the first inclined plate
With the second inclined plate, the angle of second inclined plate and pressure stabilizing flow distribution plate is 20 °~90 °, the angle of the first inclined plate and the second inclined plate
It is 90 °~180 °.
2. fire prevention flow-guiding type flue according to claim 1, which is characterized in that the first pipe is internally provided with speedup
The same side of pressure stabilizing flow distribution plate, speedup flow guiding structure face is arranged in flow guiding structure, the speedup flow guiding structure and diversion channel
To air-flow come to side be provided with slope, to reduce the airflow exits space at speedup flow guiding structure position；
The speedup flow guiding structure and first pipe inner wall form drainage section, make air-flow when by draining section, increase gas
Flow flow velocity；
Air inlet is provided on first pipe tube wall at the drainage section.
3. fire prevention flow-guiding type flue according to claim 1, which is characterized in that be provided with water conservancy diversion knot at the air inlet
It is identical to guarantee that the flow direction of air-flow is flowed to flue interior air-flow, while also avoiding the gas leak inside flue for structure.
4. fire prevention flow-guiding type flue according to claim 3, which is characterized in that the flow-guiding structure is L shape bend pipe, or
Person is diversion trench, is integrally formed with flue or the later period is separately installed.
5. fire prevention flow-guiding type flue according to claim 1, which is characterized in that the height of the diversion channel and injection slot is equal
Lower than the height of the pressure stabilizing flow distribution plate, and difference in height is 10mm~300mm, i.e. deposits between the second inclined plate and the inner surface of flue
In the spacing of 10mm~300mm；Improve the flow velocity and flow of discharge air-flow.
6. fire prevention flow-guiding type flue according to claim 2, which is characterized in that the speedup flow guiding structure is point with flue
Body formula structure is an integral structure with flue；The speedup flow guiding structure be set as single side slope or two-sided slope plate or
Block structure.
7. fire prevention flow-guiding type flue according to claim 3, which is characterized in that it is provided with fire resisting damper at the air inlet,
The fire resisting damper is an integral structure with flow-guiding structure, constitutes deflector type fire-resisting damper.
8. a kind of exhaust system, which is characterized in that including the described in any item fire prevention flow-guiding type flues of multiple claims 1~7；
It is vertically sequentially connected between multiple fire prevention flow-guiding type flues, and is provided at the fire prevention flow-guiding type flue outlet of top
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
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| CN106193539A CN106193539A (en) | 2016-12-07 |
| CN106193539B true CN106193539B (en) | 2019-06-18 |
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ID=58088099
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| Application Number | Title | Priority Date | Filing Date |
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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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Families Citing this family (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 |
Family Cites Families (7)
| 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 |
| CN2697205Y (en) * | 2004-04-07 | 2005-05-04 | 岳克明 | Flow guiding type ventilation duct for kitchen or toilet |
| DE202004008792U1 (en) * | 2004-06-02 | 2004-08-26 | K.C.R. 28 Küchen und mehr GmbH | A building ventilation system has fan assisted extraction of air from rooms and entry to a vertical chimney only in the roof space or cellar |
| 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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2016
- 2016-08-29 CN CN201610756698.9A patent/CN106193539B/en active Active
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| CN106193539A (en) | 2016-12-07 |
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