CN108286776A - A kind of gravity-flow ventilation control system reducing kitchen pollution object level - Google Patents
A kind of gravity-flow ventilation control system reducing kitchen pollution object level Download PDFInfo
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- CN108286776A CN108286776A CN201810107717.4A CN201810107717A CN108286776A CN 108286776 A CN108286776 A CN 108286776A CN 201810107717 A CN201810107717 A CN 201810107717A CN 108286776 A CN108286776 A CN 108286776A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 41
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 49
- 231100000719 pollutant Toxicity 0.000 claims abstract description 49
- 230000003993 interaction Effects 0.000 claims abstract description 25
- 239000006185 dispersion Substances 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 6
- 238000013178 mathematical model Methods 0.000 claims description 6
- 238000000149 argon plasma sintering Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000011217 control strategy Methods 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001925 catabolic effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Ventilation (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The gravity-flow ventilation control system for reducing kitchen pollution object level is utilized the invention discloses a kind of, including air velocity transducer, wind transducer, wireless transport module, PM2.5 sensors, terminal, microprocessor, man-machine interaction panel and Switch for door and window control module, building enclosure air-tightness database, model dwelling database and dispersion of pollutants multiple regional net models platform are installed in the terminal；The dispersion of pollutants multiple regional net models platform combination house model database and building enclosure air-tightness database, door and window open/close states of the kitchen pollution object to other rooms of residential housing propagation concentration in the case of minimum are calculated, to obtain different Ventilation Control strategies；Ventilation Strategies are compared and are shown by man-machine interaction panel after optimum combination by the microprocessor, and resident family sends the instruction of switch door and window to control Switch for door and window control module by man-machine interaction panel.The present invention improves indoor air quality, efficient and energy conservation and environmental protection using gravity-flow ventilation.
Description
Technical field
The present invention relates to Comment about Indoor Air Quality and feedback control art, more particularly to a kind of reduction kitchen pollution object
Horizontal gravity-flow ventilation control system.
Background technology
Studies have shown that the mankind have the time for surpassing 80% to spend indoors, therefore the quality of indoor air quality directly affects
To the existence health of the mankind, particularly, a large amount of combustion products and smoke particle that culinary art active procedure generates in home dwelling
Object seriously affects premises air quality.
To improve air quality in kitchen, publication number CN206001580U is authorized to invent a kind of band personalization air purification
The kitchen ventilator of device, the device can effectively reduce pollutant level in kitchen, but and unresolved since the propagation of kitchen pollution object is led
Other space air quality problems caused authorize publication number CN104896694A to disclose a kind of indoor air quality adjusting thus
System, although the system can integrally improve indoor air quality by introducing fresh air, its higher energy consumption makes it be applicable in
Property is limited by larger.At the same time, gravity-flow ventilation is more and more more with its preferable applicability and energy saving advantage
Researcher payes attention to.The present invention makes full use of diluting effect of the gravity-flow ventilation to indoor pollutant, passes through the blocking pair of building enclosure
The flow direction of gravity-flow ventilation is effectively controlled, and achievees the purpose that control dispersion of pollutants direction and rate, so that house
Pollutant catabolic gene is efficient and energy saving.
Invention content
It is an object of the invention to overcome the defect of current indoor air quality control technology, propose that a kind of reduction kitchen is dirty
The gravity-flow ventilation control system for contaminating object level, introducing gravity-flow ventilation using the system improves indoor air quality, and leads to
It crosses and controls different door and window open/close states to change the flow direction and flow velocity of gravity-flow ventilation, change the approach of dispersion of pollutants with this, reach
Control platform carries out the effect of purposive control in residential homes room.
In order to solve the above-mentioned technical problem, the technical scheme is that a kind of reducing the naturally logical of kitchen pollution object level
Wind control system, including air velocity transducer, wind transducer, wireless transport module, PM2.5 sensors, terminal, microprocessor,
Man-machine interaction panel and Switch for door and window control module are equipped with building enclosure air-tightness database, house mould in the terminal
Type database and dispersion of pollutants multiple regional net models platform, the model dwelling database purchase house building plane layout
And corresponding room-sized information, the building enclosure air-tightness database purchase building enclosure under corresponding different building types and exist
Air-tightness value under different conditions；
The air velocity transducer and wind transducer pass through the wind speed and direction data outside wireless transport module transfer chamber to dirt
It contaminates object and propagates multiple regional net models platform；
The PM2.5 sensors are communicated by ZigBee communications protocol with microprocessor；
The dispersion of pollutants multiple regional net models platform is by calling building enclosure air-tightness database, model dwelling
The outdoor wind speed and direction data of database and input are completed mathematical model and are built, Ventilation Strategies are calculated and are transmitted to microprocessor；
The dispersion of pollutants multiple regional net models platform arranges the Switch for door and window state of architectural exterior-protecting construction
Setup algorithm operating mode is combined, and indoor pollutant concentration level value under different operating modes is transmitted in microprocessor and is compared point
Analysis；
After Ventilation Strategies are compared optimum combination by the microprocessor, instruction control door is occurred by man-machine interaction panel
Window switch control module；
The Switch for door and window control module executes Ventilation Strategies, controls the keying of each door and window of house.
The air velocity transducer uses the FC-5SX wind speed wind direction sensors of city's sale with wind transducer.
The wireless transport module selects GSM4G modules, the module to be communicated using 4G real-time performance data.
The microprocessor uses the ATMEGA8-16AU of MICROCHIP manufactures.
The PM2.5 sensors use the PM2.5 sensors of the AGS-V8 light scattering principles of commercial type.
When the detected value of the PM2.5 sensors is less than limit value, microprocessor sends out the instruction for terminating Ventilation Strategies.
The man-machine interaction panel uses the touch screen panel of HITECH companies production.
The Switch for door and window control module uses the light-duty door and window switch control modules of DL-80 of odenx brands.
Resident family controls Switch for door and window by the self-defined transmission operational order of man-machine interaction panel.
Compared with prior art, the beneficial effects of the present invention are：
1, present invention introduces gravity-flow ventilations effectively controls indoor pollutant level, avoids and is set with fresh air purifying
It is standby to generate additional energy consumption, there is preferable energy conservation and environmental protection benefit.
2, the present invention combines lower pollutant concentration level to different door and window open/close states and is compared calculating, when providing culinary art
Best door and window opens and closes combination, can ensure the air quality in room to the maximum extent in culinary art, reduce kitchen to greatest extent
Influence of the room pollutant to other space air qualities has preferable specific aim and practicability.
Description of the drawings
Fig. 1 principle of the invention block diagrams；
Fig. 2 apparatus of the present invention arrangement schematic diagrams.
Description of the drawings：
1- buildings, the kitchens 2-, 3- air velocity transducers, 4- wind transducers, 5- wireless transport modules, 6- terminals,
7-PM2.5 sensors, 8- microprocessors, 9- man-machine interaction panels, 10- Switch for door and window control modules；
A- building enclosure air-tightness database, b- model dwellings database, c- dispersion of pollutants multiple regional net models are flat
Platform.
Specific implementation mode
Technical solution of the present invention is described in further detail in the following with reference to the drawings and specific embodiments, it is described specific
Embodiment is only explained the present invention, is not intended to limit the invention.
Fig. 1 is principle of the invention block diagram, and arrangement schematic diagram is as shown in Fig. 2, a kind of reduction kitchen pollution object of the present invention is horizontal
Gravity-flow ventilation control system, including air velocity transducer 3, wind transducer 4, wireless transport module 5, terminal 6, PM2.5 sensing
Device 7, microprocessor 8, man-machine interaction panel 9 and Switch for door and window control module 10 are equipped with building enclosure gas in the terminal 6
Close property database a, model dwelling database b and dispersion of pollutants multiple regional net models platform c, the model dwelling database
B stores house building plane layout and corresponding room-sized information, and the building enclosure air-tightness database a, which stores, to be corresponded to not
With air-tightness value of the building enclosure under building type under different conditions；The air velocity transducer 3 and wind transducer 4 pass through nothing
Wind speed and direction data outside 5 transfer chamber of line transmission module are to dispersion of pollutants multiple regional net models platform c；The pollutant passes
Broadcast rooms of the multiple regional net models platform c by calling building enclosure air-tightness database a, model dwelling database b and input
Outer wind speed wind direction data is completed mathematical model and is built, Ventilation Strategies are calculated and are transmitted to microprocessor 8；The PM2.5 sensors
7 are placed in kitchen 2, are communicated with microprocessor 8 by ZigBee communications protocol, the sensings of PM2.5 described in the present embodiment
Device 7 uses the PM2.5 sensors of the AGS-V8 light scattering principles of commercial type；The microprocessor 8 compares Ventilation Strategies
After going out optimum combination, instruction control Switch for door and window control module 10, the Switch for door and window control are occurred by man-machine interaction panel 9
Module 10 executes Ventilation Strategies, controls the keying of each door and window of house；It is micro- when the detected value of PM2.5 sensors 7 is less than limit value
Processor 8 sends out the instruction for terminating Ventilation Strategies；Switch for door and window control module described in the present embodiment 10 is using odenx brands
The light-duty door and window switch control modules of DL-80.
The ATMEGA8-16AU that microprocessor 8 described in the present embodiment is manufactured using MICROCHIP；The human-computer interaction face
The touch screen panel that plate 9 is produced using HITECH companies；Resident family can customize by man-machine interaction panel 9 and send operational order control
Switch for door and window processed.
Air velocity transducer 3 in the present embodiment, wind transducer 4 and wireless transport module 5 are placed at 1 top of building,
Air velocity transducer 3 is attached respectively with wireless transport module 5 with wind transducer 4 and communicates；
Air velocity transducer 3 is sensed with wind transducer 4 using the FC-5SX wind speed and directions of commercial type in the present embodiment
Device, wireless transport module 5 select GSM4G modules, the module to be communicated using 4G real-time performance data, and communication speed is fast, communication spirit
Living, data transmission efficiency is higher；
The wireless transport module 5 is by wireless network by the outdoor wind speed and direction data transmission of monitoring to dispersion of pollutants
Multiple regional net models platform c is polluted in conjunction with house model database b and the data of building enclosure air-tightness database a
Object propagates building for multiple regional net models platform c；
The model dwelling database b storages house building plane layout and corresponding room-sized information, main includes building
Build the connection relation between each room, the volume in each room, the communicating passage (such as door, window) and building between room
The information such as direction determine that the physical model that dispersion of pollutants multiple regional net models platform calculates, determination are built by the database
Build plane figure；
The building enclosure air-tightness database a stores under corresponding different building types building enclosure under different conditions
Air-tightness value, the value characterize architectural exterior-protecting construction ventilation characteristic, have under different open states for channels such as door, windows
It different numerical value to choose, in conjunction with the selection of the value and the input of outdoor wind speed and direction data, completes dispersion of pollutants multi-region
The mathematical model that domain network model platform calculates is built；
The microprocessor 8 is in the case where obtaining different operating modes after indoor pollutant concentration level value, according to resident family in man-machine friendship
The room priority that mutual panel 9 is arranged, is ranked up the room contamination object concentration level under various operating modes and compares, and selects minimum
The corresponding operating mode of concentration level is as optimum operating condition；
The man-machine interaction panel 9 is used to show the information of resident family's concern, and is controlled system by the panel；In detail
For carefully, man-machine interaction panel 9 is listed respectively builds each door and window open and-shut mode control strategy under optimum operating condition, resident family passes through
Man-machine interaction panel 9 selects all to receive suggestion or the value that refuses to accept a proposal, and is controlled to door and window switch control module 10 with this
System；
The Switch for door and window control module 10 carries out door and window keying control by executing the order being passed to from man-machine interaction panel 9
System achievees the purpose that change door and window open/close states；
The present invention monitors pollutant concentration in kitchen in kitchen area installation PM2.5 sensors 7 in real time, is starting
After the system, PM2.5 sensors 7 carry out the pollutant concentration data transmission of detection to microprocessor 8 by changing to concentration
Analysis prompts resident family to be not necessarily to consider the shadow that kitchen pollution object is propagated when concentration value is less than setting value by man-machine interaction panel 9
It rings, the limitation to door and window open/close states can be released；
Further, resident family also can control Switch for door and window by 9 self-defined transmission operational order of man-machine interaction panel.
Dispersion of pollutants multiple regional net models platform c of the present invention is according to mass balance principle to the pollution in each room
Object concentration is calculated, in detail for, the dispersion of pollutants multiple regional net models platform c implementation methods step is specifically such as
Under：
(1) buildings model is built：After obtaining the building room-sized that model dwelling database b is provided, building is drawn
Physical model is logical to difference by calling the data of building enclosure air-tightness database a for the channel between not chummery
Road carries out mathematical model setting, completes building for buildings model accordingly；
(2) ventilation quantity between each room of acquisition：After obtaining outdoor wind speed and direction data, pass through model platform counting chamber
Exogenous wind acts on the pressure on building external envelope structure, divulges information between calculating indoor and outdoor using the pressure difference of peripheral structure door and window both sides
Amount, similarly, the pressure difference by building premises door and window both sides calculate the ventilation quantity between each room；
(3) it between obtaining each room after ventilation quantity, according to mass balance principle, calculates indoor in the presence of pollution sources
The variation of pollutant concentration level in each room caused by the propagation of pollutant；
(4) model platform carries out permutation and combination setup algorithm operating mode for the Switch for door and window state of architectural exterior-protecting construction,
And indoor pollutant concentration level value under different operating modes is transmitted in microprocessor 8 and is compared analysis.
A specific embodiment is set forth below, the present invention will be described：
A common house type home dwelling is chosen from model dwelling database as carrier is illustrated, is equipped with seven function rooms altogether
Between, i.e., seven regions are set in dispersion of pollutants multiple regional net models platform, and model dwelling database is public using cruel family pleasure
The house type data collected are taken charge of, which includes China most cities cell or building house type data, user can be according to conjunction
Suitable house type or area is selected.For the channel (totally 2 fan doors, 1 fan window in the present embodiment) between each room, pass through tune
With the data of building enclosure air-tightness database, mathematical model setting, building enclosure air-tightness database are carried out to different channels
It is according to U.S. heating, Refrigeration ＆ Air-Conditioning Society of Engineers standard (ASHRAE 1997HVAC Fundamentals
What the air-tightness standard in Handbook) was collected, wherein mainly including door, window in architectural exterior-protecting construction etc. according to its material
And effective infiltrating area that type provides recommends Value Data, the difference of door and window open/close states to be embodied in effective infiltrating area recommendation
Difference.Air velocity transducer, wind transducer and wireless transport module are placed at building top, outdoor for monitoring in real time
Wind speed and direction data, and pollutant multiple regional net models platform is transferred data to by wireless transport module, in conjunction with this
Data carry out building the calculating divulged information between each room.By the way that pollutant emission intensity is arranged in model kitchen area, with
This simulates the pollutants from cooking fume that practical resident family generates in culinary art.According to mass balance principle.Dispersion of pollutants multizone network
Model platform further calculates out since the ventilation between room causes dispersion of pollutants in kitchen area to the amount in other rooms,
It is horizontal that pollutant concentration in each room is calculated under an operating mode with this.Further dispersion of pollutants multiple regional net models
Platform carries out permutation and combination setup algorithm operating mode for the Switch for door and window state of architectural exterior-protecting construction, for the present embodiment according to door
The combination of window open/close states shares 23=8 kinds of combining forms calculate separately out various door and windows and open and close under composite condition in each room
Pollutant concentration it is horizontal, and result of calculation is transferred in microprocessor and is compared analysis.According to resident family in human-computer interaction
The room being arranged on panel considers priority, and the pollutant concentration such as paid the utmost attention in parlor is horizontal, then microprocessor is according to visitor
8 kinds of operating modes of pollutant concentration value pair arrange from small to large in the Room, using the horizontal corresponding operating mode of minimum concentration as optimal work
Condition, and the open/close states in each room under the operating mode are shown in man-machine interaction panel, when in this, as instructing resident family to cook
The guidance instruction of door and window open/close states setting.Resident family selects all to receive to suggest by man-machine interaction panel or refusal receives to build
View, the open/close states of door and window in cooking process are determined with this.Microprocessor is opened the door and window of setting by ZigBee communication agreement
Closed state information is transferred to Switch for door and window control module, which controls the keying of door and window according to control instruction, reaches change door
The purpose of window-like state.
PM2.5 sensors in kitchen are used for detecting pollutant concentration in kitchen, and the data of detection are passed through
ZigBee communication agreement is transferred to microprocessor and is compared analysis with setting value, if detected value is higher than setting value, in people
Machine exchanges reminds user that door and window open/close states guidance instruction is taken to advantageously reduce interior on panel by way of indicator light
Pollutant concentration is horizontal, when detected value is less than setting value, then reminds user's indoor pollutant concentration level no longer by kitchen
Room pollutant effects, user can be according to self each door and window open/close states of hobby selection at this time, and releasing is to door and window keying shape
The limitation of state.
Claims (9)
1. a kind of gravity-flow ventilation control system reducing kitchen pollution object level, which is characterized in that including air velocity transducer, wind direction
Sensor, wireless transport module, PM2.5 sensors, terminal, microprocessor, man-machine interaction panel and Switch for door and window control mould
Block is equipped with building enclosure air-tightness database, model dwelling database and dispersion of pollutants multizone network in the terminal
Model platform, the model dwelling database purchase house building plane layout and corresponding room-sized information, it is described to go along with sb. to guard him knot
Structure air-tightness database purchase air-tightness value of the building enclosure under different conditions under corresponding different building types；
The air velocity transducer and wind transducer pass through the wind speed and direction data outside wireless transport module transfer chamber to pollutant
Propagate multiple regional net models platform；
The PM2.5 sensors are communicated by ZigBee communications protocol with microprocessor；
The dispersion of pollutants multiple regional net models platform is by calling building enclosure air-tightness database, model dwelling data
The outdoor wind speed and direction data in library and input are completed mathematical model and are built, Ventilation Strategies are calculated and are transmitted to microprocessor；
The dispersion of pollutants multiple regional net models platform carries out permutation and combination to the Switch for door and window state of architectural exterior-protecting construction
Setup algorithm operating mode, and indoor pollutant concentration level value under different operating modes is transmitted in microprocessor and is compared analysis；
After Ventilation Strategies are compared optimum combination by the microprocessor, instruction control door and window is occurred by man-machine interaction panel and is opened
Close control module；
The Switch for door and window control module executes Ventilation Strategies, controls the keying of each door and window of house.
2. the gravity-flow ventilation control system according to claim 1 for reducing kitchen pollution object level, which is characterized in that described
Air velocity transducer uses the FC-5SX wind speed wind direction sensors of city's sale with wind transducer.
3. the gravity-flow ventilation control system according to claim 1 for reducing kitchen pollution object level, which is characterized in that described
Wireless transport module selects GSM4G modules, the module to be communicated using 4G real-time performance data.
4. the gravity-flow ventilation control system according to claim 1 for reducing kitchen pollution object level, which is characterized in that described
Microprocessor uses the ATMEGA8-16AU of MICROCHIP manufactures.
5. the gravity-flow ventilation control system according to claim 1 for reducing kitchen pollution object level, which is characterized in that described
PM2.5 sensors use the PM2.5 sensors of the AGS-V8 light scattering principles of commercial type.
6. the gravity-flow ventilation control system according to claim 1 for reducing kitchen pollution object level, which is characterized in that described
When the detected value of PM2.5 sensors is less than limit value, microprocessor sends out the instruction for terminating Ventilation Strategies.
7. the gravity-flow ventilation control system according to claim 1 for reducing kitchen pollution object level, which is characterized in that described
Man-machine interaction panel uses the touch screen panel of HITECH companies production.
8. the gravity-flow ventilation control system according to claim 1 for reducing kitchen pollution object level, which is characterized in that described
Switch for door and window control module uses the light-duty door and window switch control modules of DL-80 of odenx brands.
9. the gravity-flow ventilation control system according to claim 1 for reducing kitchen pollution object level, which is characterized in that resident family
Switch for door and window is controlled by the self-defined transmission operational order of man-machine interaction panel.
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| CN201810107717.4A CN108286776A (en) | 2018-02-02 | 2018-02-02 | A kind of gravity-flow ventilation control system reducing kitchen pollution object level |
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| CN201810107717.4A CN108286776A (en) | 2018-02-02 | 2018-02-02 | A kind of gravity-flow ventilation control system reducing kitchen pollution object level |
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| CN201810107717.4A Pending CN108286776A (en) | 2018-02-02 | 2018-02-02 | A kind of gravity-flow ventilation control system reducing kitchen pollution object level |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110848774A (en) * | 2019-10-17 | 2020-02-28 | 佛山市云米电器科技有限公司 | Kitchen range and air conditioning equipment linkage method and system |
| CN112013426A (en) * | 2020-07-31 | 2020-12-01 | 华帝股份有限公司 | Interconnection method of intelligent cooker and intelligent window and system applying interconnection method |
| CN117111535A (en) * | 2023-10-20 | 2023-11-24 | 四川名人居门窗有限公司 | Closed space impact-resistant risk-avoiding control system and intelligent door and window control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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