CN107875746B - A kind of automatic plugging two-stage filtering device of built-in Venturi tube - Google Patents
A kind of automatic plugging two-stage filtering device of built-in Venturi tube Download PDFInfo
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- CN107875746B CN107875746B CN201711196165.0A CN201711196165A CN107875746B CN 107875746 B CN107875746 B CN 107875746B CN 201711196165 A CN201711196165 A CN 201711196165A CN 107875746 B CN107875746 B CN 107875746B
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- cylinder
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- venturi tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
- B01D46/0008—Two or more filter elements not fluidly connected positioned in the same housing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
- B01D46/0047—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for discharging the filtered gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
- B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
- B01D46/525—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material which comprises flutes
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a kind of automatic plugging two-stage filtering devices of built-in Venturi tube, including by-pass filtration cylinder, secondary filtration cylinder, Venturi tube, block plug and automatic plugging device, the Venturi tube is fixed in the middle part of demarcation plate, flow-guiding channel is set as inside Venturi tube, flow-guiding channel one end is connected to by-pass filtration gas chamber, and the other end is connected to secondary filtration gas chamber；The by-pass filtration gas chamber is arranged in by-pass filtration cylinder, and by-pass filtration gas chamber from-inner-to-outer is disposed with by-pass filtration net cylinder, level-one longitudinal direction pleated filter and level-one transverse fold filter；The secondary filtration gas chamber connection is arranged in secondary filtration cylinder, and secondary filtration gas chamber from-inner-to-outer is disposed with secondary filtration net cylinder, two longitudinal pleated filters and second level transverse fold filter；Realize the double-stage filtering processing to air；When filter element blocks, the connecting rod of automatic plugging device moves forward and blocks Venturi tube, convenient for reminding people to replace in time, clear up filter device.
Description
Technical field
The present invention relates to technical field of air purification, the automatic plugging double-stage filtering dress of specifically a kind of built-in Venturi tube
It sets.
Background technique
Air filter refers to air filter, is generally used for dust proof workshop, clean room, laboratory and toilet,
Or for the dust-proof of electric mechanical communication equipment etc., being divided into has primary filter, medium effeciency filter, high efficiency particulate air filter and Asia
Models, the various models such as efficient have different standard and effective utilization, but, existing air filter, in use,
It is filtered step by step by the multistorey strainer mesh on filter core, but the number of plies of strainer is limited and unidirectionally filters, filter fly is shorter, filtering layer
It is less, cause air filtration insufficient, successively increasing filter screen quantity will make filter core volume excessive.Therefore, it is necessary to one kind
The filter device of double-stage filtering substitutes existing filter core and uses.
Existing filter core will appear blocking after prolonged use, usually after filter core is completely plugged, could be sent out by people
It is existing, at this point, multistorey strainer mesh can not be cleared up to block completely, filter core is caused not to be available in filter core.Therefore, a kind of energy is perhaps wanted
Enough filter devices that blocking initial stage progress self-plugging protection strainer occurs in filter core satisfy the use demand, convenient for reminding people in time
Filter core is cleared up or is replaced, avoid the occurrence of irremediable loss.
Summary of the invention
It is above-mentioned to solve the purpose of the present invention is to provide a kind of automatic plugging two-stage filtering device of built-in Venturi tube
The problem of being proposed in background technique.
To achieve the above object, the invention provides the following technical scheme:
A kind of automatic plugging two-stage filtering device of built-in Venturi tube, including by-pass filtration cylinder, secondary filtration cylinder, literary mound
In pipe, block plug and automatic plugging device, the Venturi tube is fixed in the middle part of demarcation plate, and it is logical that water conservancy diversion is set as inside Venturi tube
Road, flow-guiding channel one end are connected to by-pass filtration gas chamber, and the other end is connected to secondary filtration gas chamber；The by-pass filtration gas chamber is set
It sets in by-pass filtration cylinder, by-pass filtration gas chamber from-inner-to-outer is disposed with by-pass filtration net cylinder, level-one longitudinal direction corrugated filter
Device and level-one transverse fold filter；The secondary filtration gas chamber connection is arranged in secondary filtration cylinder, and secondary filtration gas chamber is certainly
It is interior and be disposed with secondary filtration net cylinder, two longitudinal pleated filters and second level transverse fold filter outside；The level-one mistake
Air filtration indoor location has closure to fill in, and blocks plug connection automatic plugging device；The automatic plugging device by connecting rod, spring strut, piston cylinder,
The gentle pressure sensitivity of spring, piston answers mouth to form, and the closure plug is fixed on connecting rod one end and is arranged in front of the nozzle of Venturi tube,
The connecting rod other end is threaded through in spring strut and piston cylinder and connect with piston, and piston is movably arranged in piston cylinder, described
Piston cylinder outer end is equipped with air pressure and incudes mouth, and air pressure induction mouth is connected to even air cavity, is arranged with bullet on the connecting rod in the spring strut
Spring.
As a further solution of the present invention: being set as filtering in the by-pass filtration cylinder on the outside of the level-one transverse fold filter
Preceding gas chamber, by-pass filtration cylinder end connect air inlet pipe.
As a further solution of the present invention: the level-one transverse fold filter, level-one longitudinal direction pleated filter and one
One end of grade filtering net cylinder is connect with demarcation plate, and the other end is fixed on end-plate I, is run through on end-plate I and is fixed with air inlet and leads
Pipe, air induction conduit one end are connected to preceding gas chamber is filtered, and the other end is connected to even air cavity, and the one of I outside of end-plate is arranged in even air cavity
In grade cartridge filter.
As a further solution of the present invention: being set as filtering in the secondary filtration cylinder on the outside of the second level transverse fold filter
Rear gas chamber, secondary filtration cylinder end connect exhaust pipe.
As a further solution of the present invention: the secondary filtration net cylinder, two longitudinal pleated filters and second level transverse direction pleat
Wrinkle filter one end is connect with demarcation plate, and the other end is fixed on end-plate II, is run through on end-plate II and is fixed with outtake tube,
Outtake tube one end is connected to filter rear gas chamber, and the other end is connected to air collecting chamber, and the second level in II outside of end-plate is arranged in air collecting chamber
In cartridge filter.
As a further solution of the present invention: the level-one transverse fold filter, level-one longitudinal direction pleated filter, level-one
Filtering net cylinder, secondary filtration net cylinder, two longitudinal pleated filters and second level transverse fold filter aperture reduce step by step.
As a further solution of the present invention: under original state, under spring force effect, piston, connecting rod and closure plug
To one Slideslip of air inlet pipe, blocks and fill in the nozzle far from Venturi tube.
Compared with prior art, the beneficial effects of the present invention are:
1, the automatic plugging two-stage filtering device of a kind of built-in Venturi tube, dust laden air is entered even by air inlet pipe
Then air cavity enters the preceding gas chamber of filter by air induction conduit, and successively passes through level-one transverse fold filter, level-one longitudinal direction corrugated filter
Device, by-pass filtration net cylinder and secondary filtration net cylinder, two longitudinal pleated filters, second level transverse fold filter filtering under it is net
Change, purified air passes through outtake tube from filter rear gas chamber and enters air collecting chamber, and is discharged from exhaust pipe, and flow-guiding channel has very
Good guide functions；The above process realizes the double-stage filtering processing to air.
2, dust blocks level-one transverse fold filter, level-one longitudinal direction pleated filter, by-pass filtration cylinder, secondary filtration
Cylinder, two longitudinal pleated filters and second level transverse fold filter, reduce so as to cause the rate of filtration of air, lead to air inlet pipe
In the case where same conveying capacity, the air pressure of even air cavity is gradually increased, piston along piston cylinder forward slip and compressed spring, connecting rod to
Preceding movement simultaneously blocks Venturi tube, blocks flow-guiding channel, is filtered to make air inlet pipe that can not continue conveying air, because
This, to level-one transverse fold filter, level-one longitudinal direction pleated filter, by-pass filtration net cylinder, secondary filtration net cylinder, two longitudinal pleats
Wrinkle filter and second level transverse fold filter are protected, and are avoided serious accumulated plugging and can not be learnt, convenient for reminding people
Replacement in time, cleaning filter device.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of automatic plugging device in the present invention.
Fig. 3 is the structural schematic diagram of transverse fold filter in the present invention.
In figure: 1- air inlet pipe, 2- by-pass filtration cylinder, 3- end-plate I, 4- level-one transverse fold filter, 5- level-one are longitudinal
Pleated filter, 6- by-pass filtration net cylinder, 7- secondary filtration net cylinder, 8- bis- longitudinal pleated filter, 9- second level transverse fold mistake
Filter, 10- end-plate II, 11- secondary filtration cylinder, 12- exhaust pipe, 13- air collecting chamber, 14- outtake tube, 15- filter rear gas chamber,
16- secondary filtration gas chamber, 17- Venturi tube, 18- bolt, 19- demarcation plate, 20- flow-guiding channel, 21- block plug, 22- level-one mistake
Gas chamber, 24- air induction conduit, the even air cavity of 25-, 26- automatic plugging device, 27- connecting rod, 28- spring strut, 29- before air filtration room, 23- are filtered
Piston cylinder, 30- spring, 31- piston, 32- air pressure incude mouth.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1~3, in the embodiment of the present invention, a kind of automatic plugging two-stage filtering device of built-in Venturi tube, packet
It includes by-pass filtration cylinder 2, secondary filtration cylinder 11, Venturi tube 17, block plug 21 and automatic plugging device 26, the Venturi tube 17 is solid
It is scheduled on 19 middle part of demarcation plate, is set as flow-guiding channel 20,20 one end of flow-guiding channel and by-pass filtration gas chamber 22 inside Venturi tube 17
Connection, the other end are connected to secondary filtration gas chamber 16.
The by-pass filtration gas chamber 22 is arranged in by-pass filtration cylinder 2, and 22 from-inner-to-outer of by-pass filtration gas chamber is set gradually
There are by-pass filtration net cylinder 6, level-one longitudinal direction pleated filter 5 and level-one transverse fold filter 4, the level-one transverse fold filtering
Gas chamber 23 before filtering, the level-one transverse fold filter 4, level-one longitudinal direction corrugated filter are set as in the by-pass filtration cylinder 2 in 4 outside of device
One end of device 5 and by-pass filtration net cylinder 6 is connect with demarcation plate 19, and the other end is fixed on end-plate I 3, is run through on end-plate I 3
It is fixed with air induction conduit 24,24 one end of air induction conduit is connected to preceding gas chamber 23 is filtered, and the other end is connected to even air cavity 25, even air cavity 25
It is arranged in the by-pass filtration cylinder 2 in I 3 outside of end-plate, 2 end of by-pass filtration cylinder connects air inlet pipe 1.
The connection of secondary filtration gas chamber 16 is arranged in secondary filtration cylinder 11, and 16 from-inner-to-outer of secondary filtration gas chamber is successively
It is provided with the longitudinal pleated filter 8 of secondary filtration net cylinder 7, two and second level transverse fold filter 9, the second level transverse fold mistake
Filter rear gas chamber 15,7, two 8 and of longitudinal pleated filter of secondary filtration net cylinder are set as in the secondary filtration cylinder 11 in 9 outside of filter
9 one end of second level transverse fold filter is connect with demarcation plate 19, and the other end is fixed on end-plate II 10, is passed through on end-plate II 10
It wears and is fixed with outtake tube 14,14 one end of outtake tube is connected to filter rear gas chamber 15, and the other end is connected to air collecting chamber 13, air collecting chamber
13 are arranged in the secondary filtration cylinder 11 in II 10 outside of end-plate, and 11 end of secondary filtration cylinder connects exhaust pipe 12.
The level-one transverse fold filter 4, level-one longitudinal direction pleated filter 5, by-pass filtration net cylinder 6, secondary filter
The aperture of the longitudinal pleated filter 8 of cylinder 7, two and second level transverse fold filter 9 reduces step by step, convenient to filter step by step to air only
Change.
Closure plug 21 is installed in the by-pass filtration gas chamber 22, blocks 21 connection automatic plugging device 26 of plug, automatic plugging
Device 26 answers mouth 32 to form by connecting rod 27, spring strut 28, piston cylinder 29, spring 30, the gentle pressure sensitivity of piston 31, and the closure plug 21 is solid
It is scheduled on 27 one end of connecting rod and is arranged in front of the nozzle of Venturi tube 17,27 other end of connecting rod is threaded through spring strut 28 and lives
It is connect in plug tube 29 and with piston 31, piston 31 is movably arranged in piston cylinder 29, and 29 outer end of piston cylinder is equipped with air pressure and incudes mouth
32, air pressure induction mouth 32 is connected to even air cavity 25, is arranged with spring 30, original state on the connecting rod 27 in the spring strut 28
Under, under the effect of 30 elastic force of spring, piston 31, connecting rod 27 and closure plug 21 block plug 21 far from literary to 1 one Slideslip of air inlet pipe
The nozzle of venturi 17 avoids closure plug 21 from blocking Venturi tube 17.
The working principle of the invention is:
Dust laden air enters even air cavity 25 by air inlet pipe 1, gas chamber 23 before filtering then is entered by air induction conduit 24, and successively pass through
It is longitudinal to cross level-one transverse fold filter 4, level-one longitudinal direction pleated filter 5, by-pass filtration net cylinder 6 and secondary filtration net cylinder 7, two
Pleated filter 8, second level transverse fold filter 9 filtering under purify, purified air from filter rear gas chamber 15 pass through outlet
Conduit 14 enters air collecting chamber 13, and is discharged from exhaust pipe 12, and flow-guiding channel 20 has good guide functions；The above process is realized
The double-stage filtering of air is handled.
In the long-term use, dust blocks level-one transverse fold filter 4, level-one longitudinal direction pleated filter 5, level-one
The longitudinal pleated filter 8 of filtering net cylinder 6, secondary filtration net cylinder 7, two and second level transverse fold filter 9, so as to cause air
The rate of filtration reduces, and in the case where leading to the same conveying capacity of air inlet pipe 1, the air pressure of even air cavity 25 is gradually increased, and piston 31 is along work
29 forward slip of plug tube and compressed spring 30, connecting rod 27 move forward and block Venturi tube 17, block flow-guiding channel 20,
It is filtered to make air inlet pipe 1 that can not continue conveying air, therefore, to level-one transverse fold filter 4, level-one longitudinal direction fold
The longitudinal pleated filter 8 of filter 5, by-pass filtration net cylinder 6, secondary filtration net cylinder 7, two and second level transverse fold filter 9 into
Row protection, avoids serious accumulated plugging and can not learn, convenient for reminding people to replace in time, clear up filter device.
The present invention is not limited to the above embodiments, on the basis of technical solution disclosed by the invention, the skill of this field
For art personnel according to disclosed technology contents, one can be made to some of which technical characteristic by not needing creative labor
A little simple modification, equivalent change and modifications, belong in the range of technical solution of the present invention.
In the description of this specification, it should be noted that unless otherwise clearly defined and limited, term " setting ",
" connected " and " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be directly connected, the connection inside two elements can also be can be indirectly connected through an intermediary.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Claims (5)
1. a kind of automatic plugging two-stage filtering device of built-in Venturi tube, including by-pass filtration cylinder (2), secondary filtration cylinder
(11), Venturi tube (17), closure plug (21) and automatic plugging device (26), which is characterized in that the Venturi tube (17) is fixed
In the middle part of demarcation plate (19), it is set as flow-guiding channel (20) inside Venturi tube (17), flow-guiding channel (20) one end and by-pass filtration
Gas chamber (22) connection, the other end are connected to secondary filtration gas chamber (16)；The by-pass filtration gas chamber (22) is arranged in by-pass filtration
In cylinder (2), by-pass filtration gas chamber (22) from-inner-to-outer is disposed with by-pass filtration net cylinder (6), level-one longitudinal direction pleated filter
(5) and level-one transverse fold filter (4)；Secondary filtration gas chamber (16) the connection setting is in secondary filtration cylinder (11), and two
It is horizontal that grade filtering gas chamber (16) from-inner-to-outer is disposed with secondary filtration net cylinder (7), two longitudinal pleated filters (8) and second level
To pleated filter (9), filter rear gas chamber is set as in the secondary filtration cylinder (11) on the outside of the second level transverse fold filter (9)
(15), secondary filtration cylinder (11) end connection exhaust pipe (12)；The secondary filtration net cylinder (7), two longitudinal corrugated filters
Device (8) and second level transverse fold filter (9) one end are connect with demarcation plate (19), and the other end is fixed on end-plate II (10),
Through being fixed with outtake tube (14) on end-plate II (10), outtake tube (14) one end is connected to filter rear gas chamber (15), another
End is connected to air collecting chamber (13), in the secondary filtration cylinder (11) that air collecting chamber (13) is arranged on the outside of end-plate II (10)；
Closure plug (21) is installed in the by-pass filtration gas chamber (22), blocks plug (21) connection automatic plugging device (26)；It is described
Automatic plugging device (26) answers mouth by connecting rod (27), spring strut (28), piston cylinder (29), spring (30), piston (31) gentle pressure sensitivity
(32) it forms, the plug (21) that blocks is fixed on connecting rod (27) one end and setting in front of the nozzle of Venturi tube (17), described
Connecting rod (27) other end is threaded through in spring strut (28) and piston cylinder (29) and connect with piston (31), piston (31) activity setting
In piston cylinder (29), piston cylinder (29) outer end is equipped with air pressure induction mouth (32), and air pressure incudes mouth (32) and even air cavity
(25) it is connected to, is arranged with spring (30) on the connecting rod (27) in the spring strut (28).
2. a kind of automatic plugging two-stage filtering device of built-in Venturi tube according to claim 1, which is characterized in that institute
It states and is set as filtering preceding gas chamber (23) in the by-pass filtration cylinder (2) on the outside of level-one transverse fold filter (4), by-pass filtration cylinder (2) end
Portion connects air inlet pipe (1).
3. a kind of automatic plugging two-stage filtering device of built-in Venturi tube according to claim 2, which is characterized in that institute
State level-one transverse fold filter (4), one end of level-one longitudinal direction pleated filter (5) and by-pass filtration net cylinder (6) and demarcation plate
(19) it connects, the other end is fixed on end-plate I (3), is run through on end-plate I (3) and is fixed with air induction conduit (24), air induction conduit
(24) one end is connected to preceding gas chamber (23) is filtered, and the other end is connected to even air cavity (25), and even air cavity (25) is arranged in end-plate I (3)
In the by-pass filtration cylinder (2) in outside.
4. a kind of automatic plugging two-stage filtering device of built-in Venturi tube according to claim 1, which is characterized in that institute
State level-one transverse fold filter (4), level-one longitudinal direction pleated filter (5), by-pass filtration net cylinder (6), secondary filtration net cylinder
(7), the aperture of two longitudinal pleated filters (8) and second level transverse fold filter (9) reduces step by step.
5. a kind of automatic plugging two-stage filtering device of built-in Venturi tube according to claim 1, which is characterized in that just
Under beginning state, under the effect of spring (30) elastic force, piston (31), connecting rod (27) and closure plug (21) break away to air inlet pipe (1) one
It is dynamic, block nozzle of the plug (21) far from Venturi tube (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711196165.0A CN107875746B (en) | 2017-11-25 | 2017-11-25 | A kind of automatic plugging two-stage filtering device of built-in Venturi tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711196165.0A CN107875746B (en) | 2017-11-25 | 2017-11-25 | A kind of automatic plugging two-stage filtering device of built-in Venturi tube |
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| Publication Number | Publication Date |
|---|---|
| CN107875746A CN107875746A (en) | 2018-04-06 |
| CN107875746B true CN107875746B (en) | 2019-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711196165.0A Active CN107875746B (en) | 2017-11-25 | 2017-11-25 | A kind of automatic plugging two-stage filtering device of built-in Venturi tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113617137B (en) * | 2021-08-31 | 2022-05-27 | 中国石油大学(北京) | Dry gas sealing filter capable of automatically cutting off gas flow |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITCR20030003A1 (en) * | 2003-04-02 | 2004-10-03 | Solarys S R L | PNEUMATIC FILTER SHAKER DEVICE FOR VACUUM CLEANERS. |
| US8926625B2 (en) * | 2009-03-27 | 2015-01-06 | Alain Lebet | Surgical device |
| CN202823049U (en) * | 2012-09-28 | 2013-03-27 | 福建斯特机电科技股份有限公司 | Blocking alarm device for filter core of oil-gas separator |
| CN204294012U (en) * | 2014-09-17 | 2015-04-29 | 得高健康家居有限公司 | A kind of air cleaner with filter element replacing prompting function |
| CN205216415U (en) * | 2015-10-15 | 2016-05-11 | 珠海格力电器股份有限公司 | Air suction filter |
| CN208018312U (en) * | 2017-11-25 | 2018-10-30 | 惠州市勇翔科技有限公司 | A kind of automatic plugging two-stage filtering device of built-in Venturi tube |
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Effective date of registration: 20191030 Address after: 225400, 68, Huan Xi Road, Chengdong Industrial Park, Taizhou, Jiangsu, Taixing Applicant after: JIANGSU LANDIAN ENVIRONMENTAL PROTION CO., LTD. Address before: Yuelu District City, Hunan province 410006 Changsha Salty Lake Street Venus Road No. 383 building 701 room apartment 8 Xijing Applicant before: Lei Xiaoqin |
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