CN107762986A - A kind of environment-friendly type can self-cleaning exhaust fan - Google Patents
A kind of environment-friendly type can self-cleaning exhaust fan Download PDFInfo
- Publication number
- CN107762986A CN107762986A CN201711022836.1A CN201711022836A CN107762986A CN 107762986 A CN107762986 A CN 107762986A CN 201711022836 A CN201711022836 A CN 201711022836A CN 107762986 A CN107762986 A CN 107762986A
- Authority
- CN
- China
- Prior art keywords
- hairbrush
- flabellum
- exhaust fan
- housing
- environment
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
-
- 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
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
-
- 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
-
- 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
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
- F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
- B01D2267/40—Different types of filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
- B01D2267/70—Horizontal arrangement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a kind of environment-friendly type can self-cleaning exhaust fan, including housing, right baffle-plate, sleeve, groove, guide rod, magnet ring, magnet piece, spring, motor, output shaft, flabellum, the first hairbrush, electric pushrod, the second hairbrush, activated carbon adsorption layer, filter screen, the first purification of air film, right shell body, minipump, dust-collecting box, sweep-up pipe, air exhaust nozzle, exhaust nozzle and the second purification of air film.The present invention is rational in infrastructure, by electric pushrod the second hairbrush can be made to compress flabellum, compressible second hairbrush of flabellum stress, flabellum can be around output shaft rotation by motor driven, so that the first hairbrush and the second hairbrush carry out automatically cleaning to flabellum, without carrying out dismounting and artificial cleaning to exhaust fan, reduce the labor intensity of user's cleaning, cleaning time is saved, the dust cleaned is collected by dust-collecting box and minipump, avoid enclosure interior and dust raising phenomenon occurs, turn avoid dust from the groove outflow on right baffle-plate.
Description
Technical field
The present invention relates to a kind of exhaust fan, specially a kind of environment-friendly type can self-cleaning exhaust fan, belong to environmental protecting device should
Use technical field.
Background technology
Exhaust fan, fan blade rotation driving air-flow is driven by motor, a kind of air adjustment electricity for exchanging indoor and outdoor air
Device；The purpose of exhaust seeks to remove indoor foul atmosphere, regulation temperature, humidity and sensory effect；Exhaust fan extensive use
In family and public place.
After exhaust fan long-term use, flabellum may cover a large amount of dusts, and general exhaust fan needs manually to be cleaned,
Cleaning trouble, loses time, and is possible to that airborne dust can be caused again during cleaning, consequently, it is possible to causing environmental pollution；General exhaust fan
Just may be exhausted directly to after extracting room air in outside air, interior may someone's smoking or finishing, after cigarette combustion
The smell of gas and finishing material is exhausted directly to outside air, is likely to result in environmental pollution.Therefore, propose regarding to the issue above
A kind of environment-friendly type can self-cleaning exhaust fan.
The content of the invention
The purpose of the present invention be that provide a kind of environment-friendly type to solve the above problems can self-cleaning exhaust fan.
The present invention is achieved through the following technical solutions above-mentioned purpose, a kind of environment-friendly type can self-cleaning exhaust fan, including
Housing and the right baffle-plate and right shell body for being fixedly attached to housing both sides, the right baffle-plate and right shell body surface are provided with several
Groove, the right baffle-plate surface middle part embedded magnet ring, the enclosure interior is provided with sleeve, and sleeve is fixed with magnet ring and connected
Connect, the sleeve and magnet ring are socketed with guide rod, and guide rod one end is fixedly connected with magnet piece, the guide rod other end
Motor is fixedly connected with, spring is provided between the motor and right baffle-plate, the motor output end is socketed with output shaft, described defeated
Go out shaft end and be fixedly connected with flabellum, the inner walls are fixedly connected with the first hairbrush；
Case top and the bottom inside wall has been fixedly connected with electric pushrod, and the electric pushrod end is fixedly connected with
Two hairbrush, the enclosure interior are provided with activated carbon adsorption layer, and the activated carbon adsorption layer both sides are equipped with filter screen, and filter screen and shell
Internal wall is fixedly connected, and the right shell body surface bonding is connected with the first purification of air film, and the housing bottom is installed with
Minipump and dust-collecting box, the housing bottom inlay sweep-up pipe, and sweep-up pipe both ends respectively with enclosure interior and dust-collecting box
Inside connection.
Preferably, the minipump side is provided with air exhaust nozzle and exhaust nozzle, and the air exhaust nozzle inside dust-collecting box with connecting
It is logical, and the second purification of air film is wrapped up in air exhaust nozzle end.
Preferably, the both ends of the spring is respectively fixedly connected with magnet ring surface and motor one end, and spring is looped around set
On drum outer wall.
Preferably, the sleeve is vertically arranged with right baffle-plate.
Preferably, first hairbrush is between flabellum and right baffle-plate, and the first hairbrush number is two.
Preferably, second hairbrush is between flabellum and right shell body, and the second hairbrush be arranged in parallel with flabellum.
Preferably, the magnet ring is connected with magnet piece magnetic.
Preferably, the first purification of air film is brought into close contact with filter screen, and the first purification of air film is located at activated carbon suction
Between attached layer and right shell body.
The beneficial effects of the invention are as follows：
1st, the apparatus structure is reasonable, novel in design, the second hairbrush is compressed flabellum, flabellum stress by electric pushrod
Compressible second hairbrush, flabellum can be around output shaft rotations, so that the first hairbrush and the second hairbrush are to flabellum by motor driven
Automatically cleaning is carried out, without carrying out dismounting and artificial cleaning to exhaust fan, reduces the labor intensity of user's cleaning, has saved clear
The clean time, the dust cleaned can effectively be collected by dust-collecting box and minipump, enclosure interior is avoided and raise
Dirt phenomenon, dust is turn avoid from the groove outflow on right baffle-plate；
2nd, the apparatus structure is reasonable, novel in design, can be effectively to exhaust by activated carbon adsorption layer and the first purification of air film
The gas of fan discharge carries out filtration treatment, and the pernicious gas and dust that can prevent exhaust fan absorption are exhausted directly in outside air,
Avoid polluting environment, there is environment protection significance.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention；
Fig. 2 is the partial enlargement structural representation in A portions shown in Fig. 1 of the present invention；
Fig. 3 is right baffle-plate surface texture schematic diagram of the present invention.
In figure：1st, housing, 2, right baffle-plate, 3, sleeve, 4, groove, 5, guide rod, 6, magnet ring, 7, magnet piece, 8, spring,
9th, motor, 10, output shaft, 11, flabellum, the 12, first hairbrush, 13, electric pushrod, the 14, second hairbrush, 15, activated carbon adsorption layer,
16th, filter screen, the 17, first purification of air film, 18, right shell body, 19, minipump, 20, dust-collecting box, 21, sweep-up pipe, 22, pumping
Mouth, 23, exhaust nozzle, the 24, second purification of air film.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Refer to shown in Fig. 1-3, a kind of environment-friendly type can self-cleaning exhaust fan, including housing 1 and be fixedly attached to shell
The right baffle-plate 2 and right shell body 18 of the both sides of body 1, the right baffle-plate 2 and the surface of right shell body 18 are provided with several grooves 4, and groove 4 makes
The inner air of housing 1 can flow to the external world, the surface middle part embedded magnet ring 6 of right baffle-plate 2, and the inside of housing 1 is provided with sleeve
3, and sleeve 3 is fixedly connected with magnet ring 6, the sleeve 3 and magnet ring 6 are socketed with guide rod 5, and the one end of guide rod 5 is fixed
Magnet piece 7 is connected with, sleeve 3 and guide rod 5 can move to motor 9 to be oriented to, and the other end of guide rod 5 is fixedly connected with
Motor 9, is provided with spring 8 between the motor 9 and right baffle-plate 2, the output end of motor 9 is socketed with output shaft 10, the output
The end of axle 10 is fixedly connected with flabellum 11, and the inwall of housing 1 is fixedly connected with the first hairbrush 12, after flabellum 11 cleans, spring 8
Can be that motor 9 provides restoring force, magnet piece 7 and magnet ring 6 are attracting by magnetic, and guide rod 5 is fixed；
The top and bottom madial wall of housing 1 has been fixedly connected with electric pushrod 13, and the end of electric pushrod 13, which is fixed, to be connected
The second hairbrush 14 is connected to, the inside of housing 1 is provided with activated carbon adsorption layer 15, and activated carbon adsorption layer 15 is made up of activated carbon, had
Adsorption filtration function, the both sides of activated carbon adsorption layer 15 are equipped with filter screen 16, and filter screen 16 can prevent activated carbon from spilling, and filter screen
16 are fixedly connected with the inwall of housing 1, and the surface bonding of right shell body 18 is connected with the first purification of air film 17, the bottom of housing 1
Portion is installed with minipump 19 and dust-collecting box 20, and sweep-up pipe 21, and the both ends of sweep-up pipe 21 point are inlayed in the bottom of housing 1
Do not connected with the inside of housing 1 and the inside of dust-collecting box 20.
As a kind of technical optimization scheme of the present invention, the side of minipump 19 is provided with air exhaust nozzle 22 and exhaust nozzle
23, the air exhaust nozzle 22 connects with the inside of dust-collecting box 20, and the second purification of air film 24, micro vacuum are wrapped up in the end of air exhaust nozzle 22
Pump 19 can draw the inner air of dust-collecting box 20 by air exhaust nozzle 22, and the second purification of air film 24 can prevent dust from entering micro vacuum
Pump 19.
As a kind of technical optimization scheme of the present invention, the both ends of spring 8 be respectively fixedly connected with the surface of magnet ring 6 and
The one end of motor 9, and spring 8 is looped around on the outer wall of sleeve 3, spring 8 can be that motor 9 provides restoring force.
As a kind of technical optimization scheme of the present invention, the sleeve 3 is vertically arranged with right baffle-plate 2, can make motor 9 in water
Square upwards motion.
As the present invention a kind of technical optimization scheme, first hairbrush 12 between flabellum 11 and right baffle-plate 2, and
The number of first hairbrush 12 is two, and the first hairbrush 12 can clean to the side of flabellum 11.
As the present invention a kind of technical optimization scheme, second hairbrush 14 between flabellum 11 and right shell body 18,
And second hairbrush 14 be arranged in parallel with flabellum 11, the second hairbrush 14 can clean to the side of flabellum 11.
As a kind of technical optimization scheme of the present invention, the magnet ring 6 is connected with the magnetic of magnet piece 7, magnet ring 6 and magnetic
The magnetic of iron block 7 is attracting, and guide rod 5 can be fixed.
As a kind of technical optimization scheme of the present invention, the first purification of air film 17 is brought into close contact with filter screen 16, and
First purification of air film 17 is between activated carbon adsorption layer 15 and right shell body 18, the first purification of air film 17 and charcoal absorption
Layer 15 can filter to the air of discharge.
In the use of the present invention, after exhaust fan long-term use, when having covered dust on flabellum 11, motor 9, micro vacuum
Pump 19 and the external power supply of electric pushrod 13, motor 9, minipump 19 and electric pushrod 13 are started by external controlling switch,
Motor 9 drives flabellum 11 to rotate by output shaft 10, and electric pushrod 13 drives the second hairbrush 14 to be moved to the direction of flabellum 11, compresses
Flabellum 11, the forced compression spring 8 of flabellum 11, while under the guiding of guide rod 5, translate to the direction of the first hairbrush 12, then fan
Leaf 11 compresses the first hairbrush 12, and flabellum 11 is rubbed by own rotation and the first hairbrush 12 and the second hairbrush 14, carries out certainly
Cleaning, brushes the dust on lower flabellum 11, and minipump 19 is extracted the air in dust-collecting box 20 by air exhaust nozzle 22, makes dust-collecting box
20 are internally formed negative pressure, and then the dust that can make to brush down by sweep-up pipe 21 is assembled into dust-collecting box 20；Exhaust fan makes
Used time, exhaust fan extract room air, discharge, have avoided after being filtered by the purification of air film 17 of activated carbon adsorption layer 15 and first
Evil gas and dust are discharged to outside air.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (8)
1. a kind of environment-friendly type can self-cleaning exhaust fan, including housing（1）And it is fixedly attached to housing（1）The right baffle-plate of both sides
（2）And right shell body（18）, it is characterised in that：The right baffle-plate（2）And right shell body（18）Surface is provided with several grooves（4）,
The right baffle-plate（2）Surface middle part embedded magnet ring（6）, the housing（1）Inside is provided with sleeve（3）, and sleeve（3）With magnet
Ring（6）It is fixedly connected, the sleeve（3）And magnet ring（6）It is socketed with guide rod（5）, and guide rod（5）One end is fixedly connected with
Magnet piece（7）, the guide rod（5）The other end is fixedly connected with motor（9）, the motor（9）With right baffle-plate（2）Between be provided with
Spring（8）, the motor（9）Output end is socketed with output shaft（10）, the output shaft（10）End is fixedly connected with flabellum
（11）, the housing（1）Inwall is fixedly connected with the first hairbrush（12）；
The housing（1）Top and bottom madial wall has been fixedly connected with electric pushrod（13）, the electric pushrod（13）End
It is fixedly connected with the second hairbrush（14）, the housing（1）Inside is provided with activated carbon adsorption layer（15）, the activated carbon adsorption layer
（15）Both sides are equipped with filter screen（16）, and filter screen（16）With housing（1）Inwall is fixedly connected, the right shell body（18）Surface bonding
It is connected with the first purification of air film（17）, the housing（1）Bottom is installed with minipump（19）And dust-collecting box（20）,
The housing（1）Inlay sweep-up pipe in bottom（21）, and sweep-up pipe（21）Both ends respectively with housing（1）Internal and dust-collecting box（20）It is interior
Portion connects.
2. a kind of environment-friendly type according to claim 1 can self-cleaning exhaust fan, it is characterised in that：The minipump
（19）Side is provided with air exhaust nozzle（22）And exhaust nozzle（23）, the air exhaust nozzle（22）With dust-collecting box（20）Inside connection, and be evacuated
Mouth（22）Wrap up the second purification of air film in end（24）.
3. a kind of environment-friendly type according to claim 1 can self-cleaning exhaust fan, it is characterised in that：The spring（8）Two
End is respectively fixedly connected with magnet ring（6）Surface and motor（9）One end, and spring（8）It is looped around sleeve（3）On outer wall.
4. a kind of environment-friendly type according to claim 1 can self-cleaning exhaust fan, it is characterised in that：The sleeve（3）With
Right baffle-plate（2）It is vertically arranged.
5. a kind of environment-friendly type according to claim 1 can self-cleaning exhaust fan, it is characterised in that：First hairbrush
（12）Positioned at flabellum（11）With right baffle-plate（2）Between, and the first hairbrush（12）Number is two.
6. a kind of environment-friendly type according to claim 1 can self-cleaning exhaust fan, it is characterised in that：Second hairbrush
（14）Positioned at flabellum（11）With right shell body（18）Between, and the second hairbrush（14）With flabellum（11）It is arranged in parallel.
7. a kind of environment-friendly type according to claim 1 can self-cleaning exhaust fan, it is characterised in that：The magnet ring（6）
With magnet piece（7）Magnetic connects.
8. a kind of environment-friendly type according to claim 1 can self-cleaning exhaust fan, it is characterised in that：First air is net
Change film（17）With filter screen（16）It is brought into close contact, and the first purification of air film（17）Positioned at activated carbon adsorption layer（15）And right shell body
（18）Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711022836.1A CN107762986A (en) | 2017-10-27 | 2017-10-27 | A kind of environment-friendly type can self-cleaning exhaust fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711022836.1A CN107762986A (en) | 2017-10-27 | 2017-10-27 | A kind of environment-friendly type can self-cleaning exhaust fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107762986A true CN107762986A (en) | 2018-03-06 |
Family
ID=61270851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711022836.1A Withdrawn CN107762986A (en) | 2017-10-27 | 2017-10-27 | A kind of environment-friendly type can self-cleaning exhaust fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107762986A (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108844170A (en) * | 2018-07-26 | 2018-11-20 | 黄山豪泰塑胶有限公司 | A kind of novel PVC workshop air interchanger |
| CN108837610A (en) * | 2018-07-08 | 2018-11-20 | 江苏盈科汽车空调有限公司 | A kind of vehicle-mounted automotive air-conditioning system cleaning apparatus for pipes |
| CN109856437A (en) * | 2019-01-15 | 2019-06-07 | 广州市妙伊莲科技有限公司 | A kind of oscillograph that the radiating efficiency with dust reduction capability is high |
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| CN117028335A (en) * | 2023-09-19 | 2023-11-10 | 河北雄安天通能源科技有限公司 | Self-cleaning fan blade assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108837610A (en) * | 2018-07-08 | 2018-11-20 | 江苏盈科汽车空调有限公司 | A kind of vehicle-mounted automotive air-conditioning system cleaning apparatus for pipes |
| CN108844170A (en) * | 2018-07-26 | 2018-11-20 | 黄山豪泰塑胶有限公司 | A kind of novel PVC workshop air interchanger |
| CN111457533A (en) * | 2018-11-16 | 2020-07-28 | 杭州曼京科技有限公司 | Box ventilation unit of building factory building |
| CN111457534A (en) * | 2018-11-16 | 2020-07-28 | 杭州曼京科技有限公司 | Ventilation device for building factory building |
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Application publication date: 20180306 |