CN110227309A - A kind of interchangeable V-type air filter of filter core - Google Patents
A kind of interchangeable V-type air filter of filter core Download PDFInfo
- Publication number
- CN110227309A CN110227309A CN201910413685.5A CN201910413685A CN110227309A CN 110227309 A CN110227309 A CN 110227309A CN 201910413685 A CN201910413685 A CN 201910413685A CN 110227309 A CN110227309 A CN 110227309A
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- CN
- China
- Prior art keywords
- frame
- filter
- filter core
- shaped
- interchangeable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
- B01D46/121—V-type arrangements
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The present invention provides a kind of interchangeable V-type air filter of filter core, including filter outline border, at least one set of V-shaped filter inside casing is equipped in filter outline border, every set filter inside casing includes bottom plate, axle sleeve, filter core frame and shaft, and there are two bottom plate, filter core frame are equal, two bottom plates are W-shaped, axle sleeve is connected between two bottom plates, the bottom frame of each filter core frame is set on corresponding bottom plate, and shaft is set between the bottom frame of two filter core frames, and shaft is embedded in axle sleeve.Filter core can be replaced in filter of the invention, and filter outline border and filter inside casing may be repeated utilization, to reduce use cost；The V-structure of filter inside casing is fixed using card slot and buckle, to reduce the work difficulty of personnel；Filter core frame is suitable for the filter core of different sizes, different-thickness, and flexible adjustment is strong.
Description
Technical field
The present invention relates to filter apparatus field more particularly to a kind of interchangeable V-type air filters of filter core.
Background technique
V-type filter is a kind of box big efficient HEPA(High efficiency particulate air of load
Filter, high efficiency particle air filter) filter, it V-structure is formed by multi-disc non-inductive windings filter core is sealed in frame and be made, be applicable in
In constant gas amount and variable airflow amount system, be mainly used for hospital operating room, pharmaceutical factory, semiconductor factory, microelectronics factory and its
He needs the place of strict control air quality.Compared with plain filter, V-type filter considerably increases filtrate amount, increases
Filter area, it can be ensured that lower crushing saves operating cost to reduce energy consumption.
Current most V-type filter is medical disposable material, the not reproducible utilization of part, the use cost and report of user
Useless processing cost is all higher, is unsatisfactory for energy-saving and environment-friendly requirement；Since V-type filter is often installed in large-scale ventilation equipment, body
Product, weight are all larger, and installation site is higher, when V-type filter replacement filter core of the existing replaceable filter core of fraction need by
Filter is unloaded down from ventilation equipment, and maintenance personal is inconvenient for operation, and working efficiency is lower, increases the replacement of maintenance personal
Difficulty；The filter core frame of existing replaceable filter core is only used for the filter core of specific dimensions, is not suitable for the filter core of other sizes, limit
The application range of filter is made.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and the interchangeable V of a kind of filter core proposed
Type air filter.
To achieve the above object, present invention employs following technical solutions:
A kind of interchangeable V-type air filter of filter core, including filter outline border, the filter outline border is interior to be equipped at least one set
V-shaped filter inside casing, filter inside casing described in every group include bottom plate, axle sleeve, filter core frame and shaft, the bottom plate, described
There are two filter core frame is equal, two bottom plates are W-shaped, and the axle sleeve is connected between two bottom plates, each filter core
The bottom frame of frame is set on the corresponding bottom plate, and the shaft is set between the bottom frame of two filter core frames, and described turn
Axis is embedded in the axle sleeve.
Preferably, the filter core frame is rectangle frame.
Preferably, the filter core frame includes the first U-shaped frame and the second U-shaped frame, first U-shaped frame and described second U-shaped
The opening direction of frame is opposite, is provided with telescopic fixed link between first U-shaped frame and second U-shaped frame, and described
The inside of one U-shaped frame and the inside of second U-shaped frame are equipped with slide opening, and the both ends of the fixed link are respectively protruding into the slide opening
In.
Preferably, first U-shaped frame, second U-shaped frame side be respectively equipped with L-shaped supplementary frame, it is described attached
Add frame to pass through regulating mechanism respectively with first U-shaped frame, second U-shaped frame to connect.
Preferably, the regulating mechanism includes first connecting portion, second connecting portion and stud, the first connecting portion
It being connected in first U-shaped frame or second U-shaped frame, the second connecting portion is connected on the corresponding supplementary frame,
The stud passes through the first connecting portion and the second connecting portion.
Preferably, the filter outline border include epipleural, lower side panel, fixed frame and connection top plate, the epipleural with
The lower side panel is oppositely arranged, and the fixed frame is connected between the epipleural and the lower side panel, and the connection top plate has
Multiple, multiple connection top plate intervals are set in the fixed frame, and the connection top plate extend perpendicularly to it is described
Plane where epipleural or the lower side panel.
Preferably, the both ends of the bottom plate are separately connected with the epipleural, the lower side panel, the extension side of the bottom plate
To the extending direction for being parallel to the connection top plate.
Preferably, the connection top plate is equipped with card slot, and the top frame of the filter core frame is equipped with buckle, the buckle and institute
Card slot is stated to match.
Preferably, the top frame of the filter core frame is equipped with arc groove.
Compared with prior art, the invention has the benefit that
(1) in every set filter inside casing, two filter core frames are connected by shaft, and two filter core frames can rotate around the axis respectively,
Filter core is directly installed in filter core frame, and filter core can be replaced, and filter outline border and filter inside casing may be repeated benefit
With to reduce use cost；
(2) V-structure of filter inside casing is fixed with the buckle on filter core frame using the card slot on connection top plate, is not necessarily to
Additional part is fixed, and only need to remove buckle from card slot when replacing filter core, filter core frame is turned to and fixed frame institute
It is vertical in plane, it can only take out filter core and be replaced, it is not necessary to which filter outline border and filter inside casing are all removed into progress more
It changes, to reduce the work difficulty of maintenance personal；
(3) when replacing filter core, it is extremely vertical with plane where fixed frame first to rotate filter core frame, then filter core is taken out, to avoid straight
The outer wall etc. of ventilation equipment causes to stop to filter core when connecing drawing and pulling type replacement filter core；
(4) it is equipped with telescopic fixed link in filter core frame, can also be set according to the length of the size adjusting fixed link of practical filter core
Supplementary frame is set, the thickness of filter core frame can be adjusted according to the actual (real) thickness of filter core, to guarantee that filter core frame of the invention is suitable for
The filter core of different sizes, different-thickness, flexible adjustment are strong.
Detailed description of the invention
Fig. 1 is a kind of perspective view of the interchangeable V-type air filter of filter core of the embodiment of the present invention 1；
Fig. 2 is a kind of main view of the interchangeable V-type air filter of filter core of the embodiment of the present invention 1；
Fig. 3 is the enlarged drawing in Fig. 1 at A；
Fig. 4 is the perspective view of filter inside casing in a kind of interchangeable V-type air filter of filter core of the embodiment of the present invention 1；
Fig. 5 is the side view of filter inside casing in a kind of interchangeable V-type air filter of filter core of the embodiment of the present invention 1；
Fig. 6 is the perspective view of filter core frame in a kind of interchangeable V-type air filter of filter core of the embodiment of the present invention 2；
Fig. 7 is the enlarged drawing in Fig. 6 at B.
Wherein, 1- filter outline border, 2- filter inside casing, 3- bottom plate, 4- axle sleeve, 5- filter core frame, 6- shaft, 7- bottom frame,
The first U-shaped frame of 8-, the second U-shaped frame of 9-, 10- fixed link, 11- slide opening, 12- supplementary frame, 13- regulating mechanism, the connection of 14- first
Portion, 15- second connecting portion, 16- stud, 17- epipleural, 18- lower side panel, 19- fixed plate, 20- connection top plate, 21- card
Slot, 22- top frame, 23- buckle, 24- arc groove, 25- filter core.
Specific embodiment
To make to have further understanding to the purpose of the present invention, construction, feature and its function, hereby cooperate embodiment detailed
It is described as follows.
Incorporated by reference to referring to Fig. 1 to Fig. 7, Fig. 1 is a kind of interchangeable V-type air filter of filter core of the embodiment of the present invention 1
Perspective view；Fig. 2 is a kind of main view of the interchangeable V-type air filter of filter core of the embodiment of the present invention 1；Fig. 3 is in Fig. 1
Enlarged drawing at A；Fig. 4 is the vertical of filter inside casing in a kind of interchangeable V-type air filter of filter core of the embodiment of the present invention 1
Body figure；Fig. 5 is the side view of filter inside casing in a kind of interchangeable V-type air filter of filter core of the embodiment of the present invention 1；Figure
6 be the perspective view of filter core frame in a kind of interchangeable V-type air filter of filter core of the embodiment of the present invention 2；Fig. 7 is in Fig. 6 at B
Enlarged drawing.
A kind of interchangeable V-type air filter of filter core of the embodiment of the present invention 1 includes filter outline border 1, outside filter
It is equipped at least one set of V-shaped filter inside casing 2 in frame 1, refers to Fig. 4 and Fig. 5, a kind of filter core of the embodiment of the present invention 1 can
In the V-type air filter of replacement, every set filter inside casing 2 includes bottom plate 3, axle sleeve 4, filter core frame 5 and shaft 6, bottom plate 3, filter
There are two core frame 5 is equal, two bottom plates 3 are W-shaped, and axle sleeve 4 is connected between two bottom plates 3, and the bottom frame 7 of each filter core frame 5 is set to
On corresponding bottom plate 3, filter core 25 is directly installed in filter core frame 5, and shaft 6 is set between the bottom frame 7 of two filter core frames 5, shaft 6
It is embedded in axle sleeve 4.Bottom plate 3 is used to support filter core frame 5, and filter core frame 5 when needing replacing filter core 25, can only be needed with around the shaft 6 rotations
Filter core frame 5 is turned into proper angle, the wall portion of ventilation equipment is avoided to cause to stop to filter core 25, can only be taken out filter core 25
It is replaced, filter outline border 1 and filter inside casing 2 can stay in ventilation equipment, be reused, to reduce use
Cost mitigates the work difficulty of staff.
Preferably, filter core frame 5 is rectangle frame.Fig. 6 and Fig. 7 are referred to, a kind of filter core of the embodiment of the present invention 2 is interchangeable
In V-type air filter, filter core frame 5 includes the first U-shaped frame 8 and the second U-shaped frame 9, and the first U-shaped frame 8 is opened with the second U-shaped frame 9
Mouth direction is opposite, and telescopic fixed link 10, the inside of the first U-shaped frame 8 are provided between the first U-shaped frame 8 and the second U-shaped frame 9
It is equipped with slide opening 11 with the inside of the second U-shaped frame 9, the both ends of fixed link 10 are respectively protruding into slide opening 11.The both ends of fixed link 10 can
To be slided in the slide opening 11 inside the first U-shaped frame 8, the second U-shaped frame 9, so as to adjust the size of filter core frame 5, to be applicable in
In various sizes of filter core 25, flexible adjustment is strong.
Preferably, in the embodiment of the present invention 2, the first U-shaped frame 8, the second U-shaped frame 9 side be respectively equipped with it is L-shaped additional
Frame 12, supplementary frame 12 are connect by regulating mechanism 13 respectively with the first U-shaped frame 8, the second U-shaped frame 9.By connecting supplementary frame 12,
So that filter core frame 5 of the invention is suitable for the filter core 25 of different-thickness.Further, regulating mechanism 13 includes first connecting portion
14, second connecting portion 15 and stud 16, first connecting portion 14 are connected in the first U-shaped frame 8 or the second U-shaped frame 9, and second connects
Socket part 15 is connected on corresponding supplementary frame 12, and stud 16 passes through first connecting portion 14 and second connecting portion 15.Using double
Hook bolt 16 adjusts the distance between first connecting portion 14 and second connecting portion 15, to reach the mesh of adjustment 5 thickness of filter core frame
, guarantee that filter core frame 5 of the invention is suitable for the filter core 25 of different-thickness.
Preferably, filter outline border 1 includes epipleural 17, lower side panel 18, fixed frame 19 and connection top plate 20, epipleural 17
Be oppositely arranged with lower side panel 18, fixed frame 19 is connected between epipleural 17 and lower side panel 18, connection top plate 20 have it is multiple, it is multiple
It connects the interval of top plate 20 to be set in fixed frame 18, and connects top plate 20 and extend perpendicularly to 18 institute of epipleural 17 or lower side panel
Plane.Wherein, epipleural 17 and lower side panel 18 include multiple end to end V-type plates, the structure with filter inside casing 2
Match；Fixed frame 19 plays fixed, supporting role, increases the intensity of filter of the invention.Refer to Fig. 2, adjacent two
One set filter inside casing 2 is set between a connection top plate 20, and the V-type opening of filter inside casing 2 corresponds to adjacent connection top
Interval between plate 20.
Preferably, the both ends of bottom plate 3 are separately connected with epipleural 17, lower side panel 18, and the extending direction of bottom plate 3 is parallel to company
The extending direction of top plate 20 is connect, bottom plate 3 and junction, bottom plate 3 and the junction of lower side panel of epipleural 17 are additionally provided with sealant,
To enhance the leakproofness of filter of the invention.
Preferably, connection top plate 20 is equipped with card slot 21, and the top frame 22 of filter core frame 5 is equipped with buckle 23, buckle 23 and card
Slot 21 matches.When filter of the invention is installed, filter core 25 is directly installed in filter core frame 5, by filter core frame 5 around the shaft 6
Rotation, buckle 23 is stuck in card slot 21, so that the V-structure of filter inside casing 2 be fixed, is filtered the air；Replacement
When filter core 25, buckle 23 need to only be removed from card slot 21, then opposite direction rotates filter core frame 5, and filter core 25 is taken out；Due to
V-type filter is generally mounted in large-scale ventilation equipment, and installation space is narrow sometimes, when filter of the invention installs fixed without
Additional part need to be used, the work difficulty for mitigating installation personnel is conducive to.
Preferably, the top frame 22 of filter core frame 5 is equipped with arc groove 24, and personnel easy to repair take out filter core 25；Further
, the middle part of top frame 22 is arranged in arc groove 24, and both artistic and practical, still, the present invention is not limited thereto, in other embodiments
In, arc groove 24 can be set at other positions of top frame 22, as long as filter core 25 can be taken out convenient for staff.
Filter outline border 1 in a kind of interchangeable V-type air filter of filter core of the invention is adopted with filter inside casing 2
With the plastic material of environmental protection, light-weight, social benefit and high financial profit.
In a kind of interchangeable V-type air filter of filter core of the invention, two filter core frames 5 are connected by shaft 6, and two
Filter core frame 5 can be directly installed in filter core frame 5 with around the shaft 6 rotations, filter core 25, and filter core 25 can be replaced, outside filter
Frame 1 and filter inside casing 2 may be repeated utilization, to reduce use cost；Utilize 23 pairs of filters of card slot 21 and buckle
The V-structure of inside casing 2 is fixed, and only need to remove buckle 23 from card slot 21 when replacing filter core 25, filter core frame 5 is turned to
It is vertical with 19 place plane of fixed frame, it can only take out filter core 25 and be replaced, it is not necessary to by filter outline border 1 and filter inside casing
2 whole remove are replaced, to reduce the work difficulty of maintenance personal；Replace filter core 25 when, first rotate filter core frame 5 to
19 place plane of fixed frame is vertical, then filter core 25 is taken out, to avoid the outer of ventilation equipment when direct pull replacement filter core 25
Wall etc. causes to stop to filter core 25；Telescopic fixed link 10 is equipped in filter core frame 5, it can be according to the size tune of practical filter core 25
The length of solidating fixed pole 10 also sets up supplementary frame 12, and the thickness of filter core frame 5 can be adjusted according to the actual (real) thickness of filter core 25, from
And guaranteeing that filter core frame 5 of the invention is suitable for the filter core 25 of different sizes, different-thickness, flexible adjustment is strong.
The present invention is described by above-mentioned related embodiment, however above-described embodiment is only to implement example of the invention.
It must be noted that the embodiment disclosed is not limiting as the scope of the present invention.On the contrary, do not depart from spirit of the invention and
It is changed and retouched made by range, belongs to scope of patent protection of the invention.
Claims (9)
1. a kind of interchangeable V-type air filter of filter core, including filter outline border, it is characterised in that: the filter outline border
Interior to be equipped at least one set of V-shaped filter inside casing, filter inside casing described in every group includes bottom plate, axle sleeve, filter core frame and shaft,
There are two the bottom plate, the filter core frame are equal, two bottom plates are W-shaped, and the axle sleeve is connected between two bottom plates,
The bottom frame of each filter core frame is set on the corresponding bottom plate, and the shaft is set to the bottom frame of two filter core frames
Between, the shaft is embedded in the axle sleeve.
2. a kind of interchangeable V-type air filter of filter core as described in claim 1, it is characterised in that: the filter core frame is
Rectangle frame.
3. a kind of interchangeable V-type air filter of filter core as claimed in claim 2, it is characterised in that: the filter core frame packet
The first U-shaped frame and the second U-shaped frame are included, first U-shaped frame is opposite with the opening direction of second U-shaped frame, and described first is U-shaped
Telescopic fixed link, the inside of first U-shaped frame and second U-shaped frame are provided between frame and second U-shaped frame
Inside be equipped with slide opening, the both ends of the fixed link are respectively protruding into the slide opening.
4. a kind of interchangeable V-type air filter of filter core as claimed in claim 3, it is characterised in that: described first is U-shaped
Frame, second U-shaped frame side be respectively equipped with L-shaped supplementary frame, the supplementary frame and first U-shaped frame, described the
Two U-shaped frames are connected by regulating mechanism respectively.
5. a kind of interchangeable V-type air filter of filter core as claimed in claim 4, it is characterised in that: the regulating mechanism
Including first connecting portion, second connecting portion and stud, the first connecting portion is connected to first U-shaped frame or described
In two U-shaped frames, the second connecting portion is connected on the corresponding supplementary frame, and the stud passes through first connection
Portion and the second connecting portion.
6. a kind of interchangeable V-type air filter of filter core as described in claim 1, it is characterised in that: outside the filter
Frame includes that epipleural, lower side panel, fixed frame and connection top plate, the epipleural are oppositely arranged with the lower side panel, the fixation
Frame is connected between the epipleural and the lower side panel, and the connection top plate has multiple, and multiple connection top plate intervals are set
In in the fixed frame, and the connection top plate extend perpendicularly to it is flat where the epipleural or the lower side panel
Face.
7. a kind of interchangeable V-type air filter of filter core as claimed in claim 6, it is characterised in that: the two of the bottom plate
End is separately connected with the epipleural, the lower side panel, and the extending direction of the bottom plate is parallel to the extension of the connection top plate
Direction.
8. a kind of interchangeable V-type air filter of filter core as claimed in claim 6, it is characterised in that: the connection top plate
It is equipped with card slot, the top frame of the filter core frame is equipped with buckle, and the buckle matches with the card slot.
9. a kind of interchangeable V-type air filter of filter core as claimed in claim 8, it is characterised in that: the filter core frame
The top frame is equipped with arc groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910413685.5A CN110227309A (en) | 2019-05-17 | 2019-05-17 | A kind of interchangeable V-type air filter of filter core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910413685.5A CN110227309A (en) | 2019-05-17 | 2019-05-17 | A kind of interchangeable V-type air filter of filter core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110227309A true CN110227309A (en) | 2019-09-13 |
Family
ID=67861386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910413685.5A Pending CN110227309A (en) | 2019-05-17 | 2019-05-17 | A kind of interchangeable V-type air filter of filter core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110227309A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049840A (en) * | 2020-09-10 | 2020-12-08 | 杭州捷高机电科技有限公司 | Hydraulic oil filter element |
| CN112957835A (en) * | 2021-03-22 | 2021-06-15 | 美埃(中国)环境科技股份有限公司 | But filter core substitution arc V type filter |
| CN114272700A (en) * | 2021-12-28 | 2022-04-05 | 深圳市万维空调净化工程有限公司 | W-shaped air filter and air conditioning equipment |
| WO2022109017A1 (en) * | 2020-11-20 | 2022-05-27 | Baldwin Filters, Inc. | Filter with shield features |
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| CN206613290U (en) * | 2017-04-13 | 2017-11-07 | 浙江浙能兰溪发电有限责任公司 | Plate-frame air filter |
| CN208678620U (en) * | 2018-08-20 | 2019-04-02 | 深圳市亚兴环保科技有限公司 | A kind of HEPA efficient filter structure of fast demountable |
| CN210385205U (en) * | 2019-05-17 | 2020-04-24 | 美埃（中国）环境净化有限公司 | V-shaped air filter with replaceable filter element |
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| CN101365541A (en) * | 2005-12-29 | 2009-02-11 | 环境管理联合公司 | Improved active field polarized media air cleaner |
| US20140034565A1 (en) * | 2012-07-31 | 2014-02-06 | Cummins Filtration Ip, Inc. | V-Shaped Filter with Serviceable Frames and Cartridges |
| US20140237966A1 (en) * | 2013-02-28 | 2014-08-28 | Bha Altair, Llc | Gas turbine inlet filter with replaceable media cartridges |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112049840A (en) * | 2020-09-10 | 2020-12-08 | 杭州捷高机电科技有限公司 | Hydraulic oil filter element |
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| CN112957835A (en) * | 2021-03-22 | 2021-06-15 | 美埃(中国)环境科技股份有限公司 | But filter core substitution arc V type filter |
| CN114272700A (en) * | 2021-12-28 | 2022-04-05 | 深圳市万维空调净化工程有限公司 | W-shaped air filter and air conditioning equipment |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 210 000 Lanxia Road 101, Ziling Street, Jiangning District, Nanjing City, Jiangsu Province Applicant after: Meier (China) Environmental Technology Co., Ltd Address before: 210 000 Lanxia Road 101, Ziling Street, Jiangning District, Nanjing City, Jiangsu Province Applicant before: MAYAIR TECHNOLOGY (CHINA) Co.,Ltd. |