CN106907819A - energy-saving fresh air system - Google Patents
energy-saving fresh air system Download PDFInfo
- Publication number
- CN106907819A CN106907819A CN201710128920.5A CN201710128920A CN106907819A CN 106907819 A CN106907819 A CN 106907819A CN 201710128920 A CN201710128920 A CN 201710128920A CN 106907819 A CN106907819 A CN 106907819A
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- China
- Prior art keywords
- air
- energy
- saving fresh
- fresh air
- battery
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- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a kind of energy-saving fresh air system, including the exhaust apparatus for room air to be evacuated to outdoor, the air-intake device and the electric device for providing electric energy of interior are evacuated to after for outdoor air to be filtered, the electric device includes solar photovoltaic assembly, MPPT controller, battery and inverter, the output end of the solar photovoltaic assembly is connected with the input of MPPT controller, the output end of the MPPT controller is connected with the input of battery, the output end of the battery is connected with the input of inverter, power input end of two output ends of the inverter respectively with exhaust apparatus and exhaust apparatus is connected；Solar photovoltaic assembly can convert light energy into electrical energy for storage in battery, the direct current energy for producing then is transformed into alternating current for inverter and wind apparatus are confessed in output and air-intake device is used, in VMC, be conducive to the realization of energy-conserving and environment-protective so as to by Application of Solar Energy.
Description
Technical field
The present invention relates to ventilation field, more particularly to a kind of energy-saving fresh air system.
Background technology
Problem of environmental pollution was more serious in recent years, the frequency more and more higher that haze, sandstorm occur in some cities,
Healthy the bringing for giving people greatly threatens；It is the harm that air conservation is caused to health, people take
Various methods, for example, install VMC.VMC is a kind of air exchange system for meeting indoor fresh air supply, is generally comprised
The air-intake device of interior is evacuated to after for room air to be evacuated into the exhaust apparatus of outdoor, for outdoor air to be filtered and be used for
The power supply of electric energy is provided, power supply typically uses civil power.VMC is still present some shortcomings while effect is obtained.Mesh
Before, significantly, energy-conserving and environment-protective are all being advocated in countries in the world to Global Greenhouse Effect；In natural energy resources application field, solar energy is because of it
Environmentally friendly easily to obtain, utilization rate is highest, if by Application of Solar Energy in VMC, the energy will be greatlyd save, beneficial to section
The realization of energy environmental protection.
The content of the invention
In view of this, it is an object of the invention to provide a kind of energy-saving fresh air system, by Application of Solar Energy in VMC
In, beneficial to the realization of energy-conserving and environment-protective.
Energy-saving fresh air system of the invention, including for room air to be evacuated to the exhaust apparatus of outdoor, for by outdoor
The air-intake device and the electric device for providing electric energy of interior are evacuated to after air filtration, the electric device includes solar energy
Volt component, MPPT controller, battery and inverter, the output end of the solar photovoltaic assembly and the input of MPPT controller
End is connected, and the output end of the MPPT controller is connected with the input of battery, the output end and inverter of the battery
Input be connected, the power input end of two output ends of the inverter respectively with exhaust apparatus and exhaust apparatus is connected.
Further, the solar photovoltaic assembly includes battery assembly and the frame for self-contained battery assembly, the battery
Assembly includes the preceding glass sheet, front adhesive film, cell piece, rear layer glued membrane and the back-panel glass that set gradually from top to bottom；Before described
Glass sheet and back-panel glass surrounding fixed seal connection, the front adhesive film, cell piece and rear layer glued membrane are fixed on by foreboard glass
In the sealing space that glass and back-panel glass are formed.
Further, integrally formed with for installing MPPT controller, electric storage means and the circuit box of inverter on the frame.
Further, the air-intake device includes housing and installation blower fan in the housing；The housing be provided with air inlet,
Gas outlet and the interior clean room being provided with for storing purified water；The air inlet is connected by air inlet pipe with outdoor；The wind
Machine is provided with the air inlet for sucking air corresponding with air inlet and the air outlet for discharging air, and the air outlet is placed in
In clean room；The clean gas outlet of the clean room is connected by conduction pipe with gas outlet；It is provided with the air inlet
Filtering bodies I, are provided with filtering bodies II at the gas outlet.
Further, gas outlet is connected with the gas outlet, the outlet side of the gas outlet connects a diffusion barrel, the expansion
Dissipate the top surface closing of cylinder, side and air-flow through hole is distributed with：The cross-sectional area of the diffusion barrel is gradually reduced from top to bottom, the expansion
Scattered cylinder is rotationally connected with gas outlet, and the side of the diffusion barrel is made up of closure and outlet portion, and the air-flow through hole uniformly divides
It is distributed in outlet portion.
Further, the housing is provided with the water supply connector for intaking and the water out adapter for water outlet, the water inlet
Joint and water out adapter are connected with clean room；The clean room is provided with aqueous vapor and separates filter core with the junction of conduction pipe.
Further, atomizer is additionally provided with the housing, the atomizer extracts purified water from clean room and will purify
Conduction pipe is sprayed onto after water atomization.
Further, the filtering bodies I and filtering bodies II include the dust filter screen, the bamboo that are cascading along airflow direction
The ratio between charcoal filter layer and nano silver filtering layer, thickness of the dust filter screen, bamboo charcoal filter layer and nano silver filtering layer are 1：
(0.8-0.9)：(0.6-0.8).
Further, the air-intake device also includes air intake controller and is located to be used for real-time detection air quality on housing
Air mass sensor, blower fan and air mass sensor are connected with air intake controller respectively, and the air intake controller is according to sky
The signal control blower fan of makings quantity sensor feedback starts or closes.
Further, the air intake controller is provided with wireless communication module and timing module, and the air intake controller passes through nothing
Line communication module is communicated with mobile terminal remote, and the timing module is used to set the startup time or shut-in time of blower fan.
Beneficial effects of the present invention：Energy-saving fresh air system of the invention, solar photovoltaic assembly can convert light energy into electricity
Can and be stored in battery, the direct current energy for producing then is transformed into alternating current for inverter and wind apparatus and air intake are confessed in output
Device is used, and in VMC, the realization of energy-conserving and environment-protective is conducive to so as to by Application of Solar Energy；And, MPPT controller can
Maximum power point in photovoltaic array is tracked, the scheme of maximum power point is obtained, TRT is exported maximum all the time
Power, so as to improve the solar energy utilization ratio of system.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of solar photovoltaic assembly of the invention；
Fig. 3 is the structural representation of air-intake device of the invention.
Specific embodiment
As shown in Figure 1 to Figure 3：The energy-saving fresh air system of the present embodiment, including for room air to be evacuated into going out for outdoor
Wind apparatus 1, for outdoor air to be filtered after be evacuated to interior air-intake device 2 and the electric device for providing electric energy, it is described
Electric device includes solar photovoltaic assembly 31, MPPT controller 32, battery 33 and inverter 34, the photovoltaic group
The output end of part 31 is connected with the input of MPPT controller 32, and the output end of the MPPT controller 32 is defeated with battery 33
Enter end to be connected, the output end of the battery 33 is connected with the input of inverter 34, two output ends point of the inverter 34
Power input end not with exhaust apparatus 1 and exhaust apparatus 1 is connected；Exhaust apparatus 1 can be existing axial flow blower structure, as long as
The function of outdoor can be realized being evacuated to room air；Exhaust apparatus 1, air-intake device 2 can be installed indoors, electric device
Then integral installation is in outdoor；Solar photovoltaic assembly 31 can convert light energy into electrical energy for storage in battery 33, inverter
34 are transformed into the direct current energy for producing alternating current and export and confess wind apparatus 1 and air-intake device 2 is used, so as to by solar energy
It is applied in VMC, is conducive to the realization of energy-conserving and environment-protective；And, MPPT controller 32 can be to the maximum work in photovoltaic array
Rate point is tracked, and obtains the scheme of maximum power point, makes TRT Maximum Power Output all the time, so as to improve system too
Positive energy utilization rate.
In the present embodiment, the solar photovoltaic assembly 31 includes battery assembly and the frame 312 for self-contained battery assembly,
The battery assembly includes the preceding glass sheet 301, front adhesive film 302, cell piece 303, the rear layer glued membrane that set gradually from top to bottom
304 and back-panel glass 305；The preceding glass sheet 301 and the surrounding fixed seal connection of back-panel glass 305, the front adhesive film
302nd, cell piece 303 and rear layer glued membrane 304 are fixed in the sealing space formed by preceding glass sheet 301 and back-panel glass 305；By
In preceding glass sheet 301 and the surrounding fixed seal connection of back-panel glass 305, the sealing and reliability of battery assembly encapsulation can be improved
Property, the aging of encapsulating material is delayed to greatest extent；Preceding glass sheet 301, back-panel glass 305 are safety glass structure；Front layer glue
Film 302 and rear layer glued membrane 304 are then EVA adhesive film of the fusing point more than 80 DEG C.
In the present embodiment, integrally formed with for installing MPPT controller 32, electric storage means and inverter on the frame 312
34 circuit box 4；Frame 312 for example can be aluminum design；Using the structure, MPPT controller 32, battery 33, inverter 34
Can be set with solar cell module monoblock type, the function of electrical power storage and conversion is capable of achieving on solar cell module,
Without separately carrying and wiring, miniaturization and family expenses beneficial to electric device when using；The inverter 34 of electric device is preferred
It is the structure of GaN solar inverters 34.
In the present embodiment, the air-intake device 2 includes the housing 2-1 and blower fan 2-2 in housing 2-1；The shell
Body 2-1 is provided with air inlet 2-1a, gas outlet 2-1b and the interior clean room 2-3 being provided with for storing purified water；The air inlet
2-1a is connected by air inlet pipe 2-6 with outdoor；The blower fan 2-2 is provided with corresponding with air inlet 2-1a for sucking air
Air inlet 2-2a and the air outlet 2-2b for discharging air, the air outlet 2-2b are placed in clean room 2-3；The clean room
The clean gas outlet of 2-3 is connected by conduction pipe 2-4 with gas outlet 2-1b；Filtering bodies are provided with the air inlet 2-1a
I 2-51, is provided with the 2-52 of filtering bodies II at the gas outlet 2-1b；Housing 2-1 can be made of plastics or metal, and its shape can
Depending on according to demand, it is not limited to square shown in Fig. 3；Housing 2-1 has the dismountable cap being adapted to therewith, opens shell
The part such as the inner chamber of exposed housings 2-1, blower fan 2-2, clean room 2-3, flow-guiding channel is consolidated by related connector by lid
Determine in the lumen；Air inlet 2-1a is located at the side of housing 2-1, and gas outlet 2-1b is then located at cap top surface；The air intake of blower fan 2-2
Mouth 2-2a is additionally provided with a loudspeaker enlarging part, along airflow direction loudspeaker just to air inlet 2-1a at the air outlet 2-2b of blower fan 2-2
The cross-sectional area of enlarging part gradually increases, and improves the contact area of air and purified water；The bottom of loudspeaker enlarging part is located at purification
Half of water height or so；The clean gas outlet of clean room 2-3 is located at clean room 2-3 tops, and conduction pipe 2-4 is perpendicular to clean
Net gas vent is set；The 2-51 of filtering bodies I plays ground floor filtration, and clean room 2-3 plays the by the way of Water warfare
Two layers of filtration, the 2-52 of filtering bodies II then plays third layer filtration, and outdoor air is by shape after above-mentioned three layer filtration
Into clean gas, used for indoor occupant breathing；Purified water can effectively remove dust in air, and its wide material sources, can be relative
Ground reduces the quality requirement of the 2-51 of the filtering bodies I and 2-52 of filtering bodies II, reduces use cost.
In the present embodiment, the outlet side connection of gas outlet 2-7, the gas outlet 2-7 is connected with the gas outlet 2-1b
The top surface closing of one diffusion barrel 2-8, the diffusion barrel 2-8, side are distributed with air-flow through hole 2-8a：The horizontal stroke of the diffusion barrel 2-8
Sectional area is gradually reduced from top to bottom, the diffusion barrel 2-8 be rotationally connected with the side of gas outlet 2-7, the diffusion barrel 2-8 by
Closure and outlet portion constitute, and the air-flow through hole 2-8a is uniformly distributed in outlet portion；Gas outlet 2-7 can be by way of being spirally connected
It is connected with cap；Gas outlet 2-7, diffusion barrel 2-8 and gas outlet 2-1b are coaxially disposed；The aperture of air-flow through hole 2-8a can be 5mm-
10mm；Diffusion barrel 2-8 forces clean gas laterally to spread, while the gas from air-flow through hole 2-8a outflows has stream higher
Speed, is conducive to the quick diffusion of clean gas；Diffusion barrel 2-8 can rotate from axle, to adjust outgassing direction, make outlet more clever
It is living；Closure, outlet portion can respectively account for the half of diffusion barrel 2-8 surface areas, and be disposed adjacent.
In the present embodiment, the housing 2-1 is provided with the water supply connector 2-91 for water inlet and the water outlet for water outlet connects
Head 2-92, the water supply connector 2-91 and water out adapter 2-92 connects with clean room 2-3；The clean room 2-3 and mozzle
The junction of road 2-4 is provided with aqueous vapor and separates filter core 2-31；The position of water supply connector 2-91 and water out adapter 2-92 can be as needed
Depending on, as long as meeting its function；Water supply connector 2-91, water out adapter 2-92 can also make the purified water in clean room 2-3
State in being continuously replenished or circulate, to meet dedusting demand；Aqueous vapor separates filter core can prevent purified water entrance from leading
Flow tube road 2-4.
In the present embodiment, atomizer 2-11 is additionally provided with the housing 2-1, the atomizer 2-11 is from clean room 2-3
Extract purified water and conduction pipe 2-4 will be sprayed onto after purification water atomization；The atomized drop that atomizer 2-11 sprays can be to cleaning
The further dedusting of gas, while being conducive to the humidity for making clean gas keep certain, is suitable to indoor occupant breathing.
In the present embodiment, the 2-51 of the filtering bodies I and 2-52 of filtering bodies II includes being cascading along airflow direction
Dust filter screen, bamboo charcoal filter layer and nano silver filtering layer, the dust filter screen, bamboo charcoal filter layer and nano silver filtering layer thickness
The ratio between degree is 1：(0.8-0.9)：(0.6-0.8)；The 2-51 of filtering bodies I and the 2-52 of filtering bodies II are removably set, just
In assembly and disassembly；The 2-51 of filtering bodies I and the 2-52 of filtering bodies II of the structure are conducive to further lifting air purification effect；Dust is filtered
The thickness of net, bamboo charcoal filter layer and nano silver filtering layer can be 2mm-5mm.
In the present embodiment, the air-intake device 2 also includes air intake controller 2-12 and is located on housing 2-1 to be used for inspection in real time
Survey air quality air mass sensor 2-13, blower fan 2-2 and air mass sensor 2-13 respectively with air intake controller 2-
12 are connected, and the signal control blower fan 2-2 that the air intake controller 2-12 feeds back according to air mass sensor 2-13 starts or closes
Close；The air intake controller 2-12 is provided with wireless communication module and timing module, and the air intake controller 2-12 passes through channel radio
Letter module is communicated with mobile terminal remote, and the timing module is used to set the startup time or shut-in time of blower fan 2-2；Air intake
Controller 2-12 for example can be existing single-chip microcomputer；It is predeterminable in air intake controller 2-12 to have qualified air quality value, work as room
Interior air is automatically switched off blower fan 2-2 when reaching acceptance value, realize automatically controlling；Additionally, air-intake device 2 can also realize long-range control
System, user goes home the time on the estimation, and the mobile terminal remote by carrying with starts purifier and works in advance, air matter
Air quality in quantity sensor 2-13 real-time detections room, until the air cleanliness of interior meets setting value, air intake controller
2-12 just closes purifier, so as to ensure that user one breathes clean air by stepping into interior.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to skill of the invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, it all should cover at this
In the middle of the right of invention.
Claims (10)
1. a kind of energy-saving fresh air system, including for room air to be evacuated to the exhaust apparatus of outdoor, for by outdoor air mistake
The air-intake device and the electric device for providing electric energy of interior are evacuated to after filter, it is characterised in that：The electric device is included too
Positive energy photovoltaic module, MPPT controller, battery and inverter, the output end and MPPT controller of the solar photovoltaic assembly
Input be connected, the output end of the MPPT controller is connected with the input of battery, the output end of the battery and
The input of inverter is connected, two output ends of the inverter respectively with exhaust apparatus and the power input end phase of exhaust apparatus
Even.
2. energy-saving fresh air system according to claim 1, it is characterised in that：The solar photovoltaic assembly includes battery assembly
With the frame for self-contained battery assembly, the battery assembly include set gradually from top to bottom preceding glass sheet, front adhesive film,
Cell piece, rear layer glued membrane and back-panel glass；The preceding glass sheet and back-panel glass surrounding fixed seal connection, the front layer glue
Film, cell piece and rear layer glued membrane are fixed in the sealing space formed by preceding glass sheet and back-panel glass.
3. the energy-saving fresh air system described in wanting 2 is weighed according to right, it is characterised in that：Integrally formed with for installing on the frame
The circuit box of MPPT controller, electric storage means and inverter.
4. the energy-saving fresh air system according to any one of claims 1 to 3, it is characterised in that：The air-intake device includes shell
Body and installation blower fan in the housing；The housing is provided with air inlet, gas outlet and interior is provided with for storing the net of purified water
Change room；The air inlet is connected by air inlet pipe with outdoor；The blower fan is provided with corresponding with air inlet for sucking air
Air inlet and the air outlet for discharging air, the air outlet is placed in clean room；The clean gas of the clean room go out
Mouth is connected by conduction pipe with gas outlet；Filtering bodies I are provided with the air inlet, filtering bodies are provided with the gas outlet
Ⅱ。
5. energy-saving fresh air system according to claim 4, it is characterised in that：Gas outlet, institute are connected with the gas outlet
The outlet side for stating gas outlet connects a diffusion barrel, and the top surface closing of the diffusion barrel, side are distributed with air-flow through hole：The diffusion
The cross-sectional area of cylinder is gradually reduced from top to bottom, and the diffusion barrel is rotationally connected with gas outlet, and the side of the diffusion barrel is by sealing
Closing part and outlet portion constitute, and the air-flow through hole is uniformly distributed in outlet portion.
6. energy-saving fresh air system according to claim 5, it is characterised in that：The housing is provided with the water inlet for intaking
Joint and the water out adapter for water outlet, the water supply connector and water out adapter are connected with clean room；The clean room with lead
The junction in flow tube road is provided with aqueous vapor and separates filter core.
7. energy-saving fresh air system according to claim 6, it is characterised in that：Atomizer is additionally provided with the housing, it is described
Atomizer extracts purified water from clean room and will be sprayed onto conduction pipe after purification water atomization.
8. energy-saving fresh air system according to claim 7, it is characterised in that：The filtering bodies I and filtering bodies II include
Dust filter screen, bamboo charcoal filter layer and the nano silver filtering layer being cascading along airflow direction, the dust filter screen, bamboo charcoal mistake
The ratio between thickness of filtering layer and nano silver filtering layer is 1：(0.8-0.9)：(0.6-0.8).
9. energy-saving fresh air system according to claim 8, it is characterised in that：The air-intake device also includes air intake controller
Be located on housing the air mass sensor that is used for real-time detection air quality, blower fan and air mass sensor respectively with enter
Wind controller is connected, and the signal control blower fan that the air intake controller feeds back according to air mass sensor starts or closes.
10. energy-saving fresh air system according to claim 9, it is characterised in that：The air intake controller is provided with radio communication
Module and timing module, the air intake controller are communicated by wireless communication module with mobile terminal remote, the timing module
Startup time or shut-in time for setting blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128920.5A CN106907819A (en) | 2017-03-06 | 2017-03-06 | energy-saving fresh air system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128920.5A CN106907819A (en) | 2017-03-06 | 2017-03-06 | energy-saving fresh air system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106907819A true CN106907819A (en) | 2017-06-30 |
Family
ID=59186696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710128920.5A Pending CN106907819A (en) | 2017-03-06 | 2017-03-06 | energy-saving fresh air system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106907819A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107269307A (en) * | 2017-07-05 | 2017-10-20 | 刘毅 | Tunnel ventilation system |
| CN107269306A (en) * | 2017-07-05 | 2017-10-20 | 刘毅 | Double hole highway tunnel construction ventilating systems |
| CN107524467A (en) * | 2017-07-05 | 2017-12-29 | 刘毅 | Highway tunnel construction laneway type exhaust system |
| CN107559037A (en) * | 2017-07-11 | 2018-01-09 | 史思强 | Air-exhaust type purification of air tunnel structure |
| CN107575259A (en) * | 2017-07-11 | 2018-01-12 | 王伟 | Tunnel air cleaning system |
| CN110422728A (en) * | 2019-07-08 | 2019-11-08 | 姜杰 | A kind of fresh air-changing device in elevator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107269307A (en) * | 2017-07-05 | 2017-10-20 | 刘毅 | Tunnel ventilation system |
| CN107269306A (en) * | 2017-07-05 | 2017-10-20 | 刘毅 | Double hole highway tunnel construction ventilating systems |
| CN107524467A (en) * | 2017-07-05 | 2017-12-29 | 刘毅 | Highway tunnel construction laneway type exhaust system |
| CN107559037A (en) * | 2017-07-11 | 2018-01-09 | 史思强 | Air-exhaust type purification of air tunnel structure |
| CN107575259A (en) * | 2017-07-11 | 2018-01-12 | 王伟 | Tunnel air cleaning system |
| CN110422728A (en) * | 2019-07-08 | 2019-11-08 | 姜杰 | A kind of fresh air-changing device in elevator |
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Application publication date: 20170630 |