CN116466047A - Intelligent detection system - Google Patents
Intelligent detection system Download PDFInfo
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- CN116466047A CN116466047A CN202310725567.4A CN202310725567A CN116466047A CN 116466047 A CN116466047 A CN 116466047A CN 202310725567 A CN202310725567 A CN 202310725567A CN 116466047 A CN116466047 A CN 116466047A
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- 238000001514 detection method Methods 0.000 title claims abstract description 104
- 238000012545 processing Methods 0.000 claims abstract description 45
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 36
- 239000001301 oxygen Substances 0.000 claims abstract description 36
- 230000008859 change Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 15
- 238000012937 correction Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000009423 ventilation Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital using a threshold to release an alarm or displaying means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/02—Indicating direction only, e.g. by weather vane
-
- 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
Abstract
The invention is applicable to the field of detection systems, and provides an intelligent detection system which comprises a shell, a module group arranged in the shell and a wind direction detection structure arranged at the bottom end of the shell; the wind direction detection structure comprises a guide plate rotatably arranged at the bottom end of the shell; the space scanning unit is used for scanning the area of the ventilation opening of the space where the equipment is located and the maximum cross section and the minimum cross section of the space parallel to the ventilation opening; the sensor unit includes an oxygen concentration sensor; the wind direction stability detection unit monitors the air flow direction angle parameter of the direction-changing airflow in the space by using the swing of the guide plate and the swing times of the guide plate; the central processing unit comprises a first processing unit, a second processing unit, an execution unit and a data processing unit; the alarm unit starts working according to the comparison result, so that the invention can adjust the detection frequency of the alarm unit and oxygen by detecting the environmental conditions such as space, wind direction change and the like, and increase the detection accuracy.
Description
Technical Field
The invention relates to the field of detection systems, in particular to an intelligent detection system.
Background
Along with the improvement of the living standard of people, the comfort level requirement of people on living environment is higher and higher, and various detection devices are arranged, such as an air quality detector for air quality detection, but along with the continuous improvement of the functions and performances of the air quality detector, the air quality detector is not only used for detecting the living comfort level of people, but also used for detecting the working environment under more conditions, judging whether the working environment condition meets the standard or not, and further providing alarm work if the working environment condition does not meet the standard, so that the safety of staff is ensured. The working environment to be detected is, for example, some relatively closed working space (such as underground working, deep well working, etc.).
The air detection system in the prior art is used for detecting the oxygen concentration in the air, and is a process of instantaneous monitoring (when the air detection system works, the detection device is placed in the environment and immediately reacts to detection data), and the detection device in the mode only detects the instantaneous data of a position to be detected and cannot further analyze the environmental condition; the other is to set an equal frequency detection process (in operation, a detection frequency is set for the detection device, the detection device can detect the environmental data at equal intervals), and in the detection process, the detection frequency is preset and fixed, so that the detection frequency cannot adapt to the detected environmental condition (cannot synchronize with the change frequency of the external environment), so as to further improve the detection effect.
In summary, it is clear that the prior art has inconvenience and defects in practical use, so that improvement is needed.
Disclosure of Invention
In view of the above-mentioned drawbacks, an object of the present invention is to provide an intelligent detection system, which can adjust the frequency of detecting oxygen by itself by detecting the conditions of the environment, such as space, wind direction change, etc., and increase the accuracy of detection.
In order to achieve the above purpose, the invention provides an intelligent detection system, which comprises a shell, a module group arranged in the shell and a wind direction detection structure arranged at the bottom end of the shell; the wind direction detection structure comprises a guide plate rotatably arranged at the bottom end of the shell; a space scanning unit for scanning the vent area S of the space where the equipment is located 1 And a maximum section S parallel to the vent in the space Big size Minimum cross-sectional area S Small size The method comprises the steps of carrying out a first treatment on the surface of the A sensor unit including an oxygen concentration sensor that monitors an oxygen concentration N in a space; the wind direction stability detection unit monitors the air flow direction angle parameter J of the direction-changing airflow in the space by using the swing of the guide plate i The swinging times A of the guide plate; the central processing unit comprises a first processing unit, a second processing unit, an execution unit and a data processing unit; the first processing unit calculates a space circulation coefficient according to the structural data scanned by the space scanning unit, and then preliminarily adjusts the air detection frequency C according to the space circulation coefficient; when the wind direction stability detection unit detects that the airflow direction in the space is in an unstable change state, the second processing unit acquires the frequency A of swinging of the guide plate and the airflow direction angle parameter J i Calculating to obtain an air frequency compensation correction parameter; the air detection frequency C is regulated again according to the air frequency compensation correction parameters; the execution unit controls the oxygen concentration sensor to perform detection work according to the finally adjusted air detection frequency C ''; the data processing unit is used for acquiring the oxygen concentration N data detected by the oxygen concentration sensor and carrying out weighted average processing; comparing the processed data with the built-in early warning data; and the alarm unit is used for starting according to the comparison result.
According to the intelligent detection system, the space scanning unit divides the space structure into an equal-flow structure, a equal-flow structure and a three-flow structure according to the scanning condition; wherein if S Big size =S Small size ，S Big size ±△S=S 1 The space structure is a constant flow structure; if S Big size ＞S Small size ，S Small size ≥S 1 The spatial structure is a second-class circulation structure; if S Big size ≥S Small size ，S Small size ＜S 1 The space structure is a three-equal flow structure; wherein DeltaS is less than or equal to 1/10S 1 。
According to the intelligent detection system of the invention, a first space circulation coefficient preset value mu is arranged in the central processing unit X A second spatial flow coefficient preset value mu Y The method comprises the steps of carrying out a first treatment on the surface of the When the space where the equipment is located is an equal flowWhen the structure is passed, the corresponding space circulation coefficient mu 1 =μ X /μ Y The method comprises the steps of carrying out a first treatment on the surface of the When the space where the equipment is located is of a equal-level circulation structure, the corresponding space circulation coefficient mu 2 =1; when the space where the equipment is located is of a three-equal flow structure, the corresponding space flow coefficient mu 3 =μ Y /μ X The method comprises the steps of carrying out a first treatment on the surface of the Wherein mu Y ＞μ X 。
According to the intelligent detection system of the invention, the air detection frequency after primary adjustment is C' =c 0 ×μ i ；μ i The spatial circulation coefficient corresponding to the ith circulation structure.
According to the intelligent detection system of the invention, the readjustment of the air detection frequency is performed according to the following formula: c "=c' ×f; wherein F is an air frequency compensation correction parameter.
According to the intelligent detection system of the invention, the central processing unit is internally provided with the air flow direction angle corresponding parameter J 0 And an angle change allowance parameter DeltaJ, the air frequency compensation correction parameter F is calculated according to the following formula: when J i ≤J 0 F=1 for ±Δj; when J i ＞J 0 At (+ -) Δj, f= (J i －J 0 ）×A/C A X The method comprises the steps of carrying out a first treatment on the surface of the Wherein A represents the swinging times of the deflector in the detection time period, and C A X The times of the deflector facing the direction of the vent in the swinging process is shown by J i The air flow direction angle parameter at the ith moment.
According to the intelligent detection system of the invention, the weighted average of the oxygen concentration N is processed according to the following formula: n (N) Flat plate =∑N i B, wherein B is the number of times of detection; b=c″ x h, which is the period of detection.
According to the intelligent detection system, an oxygen concentration judgment value N' is arranged in the central processing unit; when N is Flat plate Not less than N', the alarm unit is not started; when N is Flat plate And < N', the alarm unit is started.
The invention provides an intelligent detection system, which comprises a shell, a module group arranged in the shell and a detection systemThe wind direction detection structure is arranged at the bottom end of the shell; the wind direction detection structure comprises a guide plate rotatably arranged at the bottom end of the shell; a space scanning unit for scanning the vent area S of the space where the equipment is located 1 And a maximum section S parallel to the vent in the space Big size Minimum cross-sectional area S Small size The method comprises the steps of carrying out a first treatment on the surface of the A sensor unit including an oxygen concentration sensor that monitors an oxygen concentration N in a space; the wind direction stability detection unit monitors the air flow direction angle parameter J of the direction-changing airflow in the space by using the swing of the guide plate i The swinging times A of the guide plate; the central processing unit comprises a first processing unit, a second processing unit, an execution unit and a data processing unit; the first processing unit calculates a space circulation coefficient according to the structural data scanned by the space scanning unit, and then preliminarily adjusts the air detection frequency C according to the space circulation coefficient; when the wind direction stability detection unit detects that the airflow direction in the space is in an unstable change state, the second processing unit acquires the frequency A of swinging of the guide plate and the airflow direction angle parameter J i Calculating to obtain an air frequency compensation correction parameter; the air detection frequency C is regulated again according to the air frequency compensation correction parameters; the execution unit controls the oxygen concentration sensor to perform detection work according to the finally adjusted air detection frequency C ''; the data processing unit is used for acquiring the oxygen concentration N data detected by the oxygen concentration sensor and carrying out weighted average processing; comparing the processed data with the built-in early warning data; and the alarm unit is used for starting according to the comparison result. The invention can adjust the detection frequency of the oxygen by detecting the conditions of the environment, such as space, wind direction change and the like, thereby increasing the detection precision.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is another angular schematic view of the present invention;
FIG. 3 is a schematic view of a space diagram illustrating an equal flow structure;
FIG. 4 is a schematic spatial illustration of a structure listed as a second-order flow;
FIG. 5 is a schematic spatial illustration of a three-equal flow configuration;
FIG. 6 is a graph showing the distribution of the air flow direction angle parameter, the air flow direction angle correspondence parameter, and the angle variation allowance parameter at the i-th instant;
in the figure, 1-shell, 2-guide plate, 3-space scanning unit and 4-air inlet.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and examples, it being understood that the specific examples described herein are for illustration only and are not intended to limit the present invention.
Referring to fig. 1 and 2, the present invention provides an intelligent detection system, which includes a housing 1, a module group (not shown) installed inside the housing 1, and a wind direction detection structure installed at the bottom end of the housing 1; the wind direction detection structure comprises a guide plate 2 rotatably arranged at the bottom end of the shell 1; in this example, the baffle 2 adopts a straight plate structure, which can be better matched with the air flow to perform auxiliary detection, and of course, other structural patterns, such as curved, wave-shaped, etc., or other structures which can sense the air flow direction conveniently, such as a fan housing structure, can be selected according to the needs. When the air deflector 2 works, the air deflector 2 can conform to the air flow direction (the air deflector 2 and the air flow are in the same direction, as shown in fig. 2), and when the air flow is in an unstable state, the air deflector 2 corresponding to the air flow is also in an unstable swing state.
The module group comprises a space scanning unit 3 (shown in fig. 1) for scanning the vent area S of the space in which the apparatus is located 1 And a maximum section S of the space parallel to the ventilation opening Big size Minimum cross-sectional area S Small size ；
A sensor unit including an oxygen concentration sensor that monitors an oxygen concentration N in a space; specifically, in this example, the oxygen concentration sensor is a built-in type (not shown in the figure), and the air flow enters the air flow channel in the device through the air inlet 4 provided on the housing 1, and is discharged through the air outlet (not shown in the figure), and the oxygen concentration sensor detects the air flow in the air flow channel.
The wind direction stability detection unit monitors the air flow direction angle parameter J of the direction-changing airflow in the space by using the swing of the guide plate 2 i The swinging times A of the guide plate;
the central processing unit comprises a first processing unit, a second processing unit, an execution unit and a data processing unit; the first processing unit calculates a space circulation coefficient according to the structural data scanned by the space scanning unit, and then preliminarily adjusts the air detection frequency C according to the space circulation coefficient; specifically, the space scanning unit divides the space structure into an equal-flow structure, a equal-flow structure and a three-flow structure according to the scanning condition; wherein, the liquid crystal display device comprises a liquid crystal display device,
referring to FIG. 3, if S Big size =S Small size ，S Big size ±△S=S 1 The space structure is a constant flow structure, the detection space in the constant flow structure is a straight cylindrical structure, and the air circulation capacity of the structure is high; wherein DeltaS is less than or equal to 1/10S 1 。
Referring to FIG. 4, if S Big size ＞S Small size ，S Small size ≥S 1 The space structure is a second-level circulation structure, the detection space in the second-level circulation structure is a medium-shaped structure, and after the air flow enters the space structure, the air flow is driven to generate turbulence in the space due to the characteristics of the space, and the turbulence can obstruct the circulation of the air to a certain extent, so that the air circulation capacity of the structure is slightly weak;
referring to FIG. 5, if S Big size ≥S Small size ，S Small size ＜S 1 The space structure is a three-equal flow structure, and the inside of the detection space in the three-equal flow structure is concave or has a barrier to prevent the air flow, so that the air flow capacity of the structure is poor.
A first space circulation coefficient preset value mu is arranged in the central processing unit X A second spatial flow coefficient preset value mu Y The method comprises the steps of carrying out a first treatment on the surface of the Wherein mu Y ＞μ X ，μ Y ∈｛4，8｝，μ X ∈｛2，4｝
When the space where the device is located is a constant flow structure, the corresponding space flow coefficient mu 1 =μ X /μ Y The method comprises the steps of carrying out a first treatment on the surface of the Wherein the calculated spatial flow coefficient mu 1 Should be less than 1, according to C' =c 0 ×μ 1 After calculation, C' should be smaller than the initial detection frequency C 0 . This is because the air flow is strong and the oxygen concentration tends to be stable in the space of the straight tubular structure, so that it is not necessary to maintain a high detection strength for a long period of time.
When the space where the equipment is located is of a equal-level circulation structure, the corresponding space circulation coefficient mu 2 =1; wherein according to C' =c 0 ×μ 1 After calculation, C' maintains the initial detection frequency C 0 . This is because the air fluidity is relatively weak in the space of the "medium" structure (compared with the straight tubular structure), and the oxygen concentration is relatively stable, so that the original detection frequency is maintained.
When the space where the equipment is located is of a three-equal flow structure, the corresponding space flow coefficient mu 3 =μ Y /μ X The method comprises the steps of carrying out a first treatment on the surface of the Wherein the calculated spatial flow coefficient mu 1 Should be greater than 1, according to C' =c 0 ×μ 1 After calculation, C' should be greater than the initial detection frequency C 0 . This is because the air flow is weak and the oxygen concentration tends to be unstable in this spatial structure, so that it is necessary to maintain a high detection intensity.
Referring to fig. 6, when the wind direction stability detecting unit detects that the airflow direction in the space is in an unstable state (the airflow direction is in an unstable state due to the change of the external environment), the airflow direction is unstable and further affects the airflow quantity entering the detecting space, the second processing unit obtains the number of times of swing a of the deflector and the airflow direction angle parameter J i Calculating to obtain an air frequency compensation correction parameter F; the air detection frequency C is regulated again according to the air frequency compensation correction parameter F;
readjustment of the air detection frequency is adjusted according to the following formula:
c "=c' ×f; wherein F is an air frequency compensation correction parameter;
the central processing unit is internally provided with an air flow direction angle corresponding parameter J 0 And an angle change allowance parameter DeltaJ, the air frequency compensation correction parameter F is calculated according to the following formula:
when J i ≤J 0 F=1 for ±Δj;
when J i ＞J 0 At (+ -) Δj, f= (J i －J 0 ）×A/C A X ；
Wherein A represents the swinging times of the deflector in the detection time period, and C A X The number of times of the deflector facing the direction of the vent during the swing process (can be approximately regarded as a parameter J corresponding to the air flow direction angle 0 Parallel), J i The air flow direction angle parameter at the ith moment.
The execution unit controls the oxygen concentration sensor to perform detection work according to the finally adjusted air detection frequency C '';
the data processing unit acquires the data of the oxygen concentration N detected by the oxygen concentration sensor and carries out weighted average processing, and specifically, the weighted average of the oxygen concentration N is processed according to the following formula:
N flat plate =∑N i B, wherein B is the number of times of detection; b=c″ x h, which is the period of detection; comparing the processed data with the built-in early warning data, and starting the alarm unit according to the comparison result; an oxygen concentration judgment value N' is arranged in the central processing unit;
when N is Flat plate Not less than N', the alarm unit is not started;
when N is Flat plate And < N', the alarm unit is started.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The intelligent detection system is characterized by comprising a shell, a module group arranged in the shell and a wind direction detection structure arranged at the bottom end of the shell;
the wind direction detection structure comprises a guide plate rotatably arranged at the bottom end of the shell;
a space scanning unit for scanning the vent area S of the space where the equipment is located 1 And a maximum section S parallel to the vent in the space Big size Minimum cross-sectional area S Small size ；
A sensor unit including an oxygen concentration sensor that monitors an oxygen concentration N in a space;
the wind direction stability detection unit monitors the air flow direction angle parameter J of the direction-changing airflow in the space by using the swing of the guide plate i The swinging times A of the guide plate;
the central processing unit comprises a first processing unit, a second processing unit, an execution unit and a data processing unit; the first processing unit calculates a space circulation coefficient according to the structural data scanned by the space scanning unit, and then preliminarily adjusts the air detection frequency C according to the space circulation coefficient;
when the wind direction stability detection unit detects that the airflow direction in the space is in an unstable change state, the second processing unit acquires the swing times A of the guide plate and the airflow direction angle parameter J i Calculating to obtain an air frequency compensation correction parameter; the air detection frequency C is regulated again according to the air frequency compensation correction parameters;
the execution unit controls the oxygen concentration sensor to perform detection work according to the finally adjusted air detection frequency C '';
the data processing unit is used for acquiring the oxygen concentration N data detected by the oxygen concentration sensor and carrying out weighted average processing; comparing the processed data with the built-in early warning data;
and the alarm unit is used for starting according to the comparison result.
2. The intelligent detection system according to claim 1, wherein the spatial scanning unit divides the spatial structure into an equal-flow structure, a equal-flow structure and a three-flow structure according to the scanning condition; wherein, the liquid crystal display device comprises a liquid crystal display device,
if S Big size =S Small size ，S Big size ±△S=S 1 The space structure is a constant flow structure;
if S Big size ＞S Small size ，S Small size ≥S 1 The spatial structure is a second-class circulation structure;
if S Big size ≥S Small size ，S Small size ＜S 1 The space structure is a three-equal flow structure;
wherein DeltaS is less than or equal to 1/10S 1 。
3. The intelligent detection system according to claim 2, wherein the central processing unit is internally provided with a first preset value μ of the spatial circulation coefficient X A second spatial flow coefficient preset value mu Y ；
When the space where the device is located is a constant flow structure, the corresponding space flow coefficient mu 1 =μ X /μ Y ；
When the space where the equipment is located is of a equal-level circulation structure, the corresponding space circulation coefficient mu 2 =1；
When the space where the equipment is located is of a three-equal flow structure, the corresponding space flow coefficient mu 3 =μ Y /μ X ；
Wherein mu Y ＞μ X 。
4. The intelligent detection system according to claim 3, wherein the primary adjusted air detection frequency C' =c 0 ×μ i ；
μ i The spatial circulation coefficient corresponding to the ith circulation structure.
5. The intelligent detection system according to claim 4, wherein readjustment of the air detection frequency is performed according to the following formula:
C’’=C’×F；
wherein F is an air frequency compensation correction parameter.
6. The intelligent detection system according to claim 5, wherein the central processing unit is internally provided with an air flow direction angle corresponding parameter J 0 And an angle change allowance parameter DeltaJ, the air frequency compensation correction parameter F is calculated according to the following formula:
when J i ≤J 0 F=1 for ±Δj;
when J i ＞J 0 At (+ -) Δj, f= (J i －J 0 ）×A/C A X ；
Wherein A represents the swinging times of the deflector in the detection time period, and C A X The times of the deflector facing the direction of the vent in the swinging process is shown by J i The air flow direction angle parameter at the ith moment.
7. The intelligent detection system according to claim 6, wherein the weighted average of the oxygen concentration N is processed according to the following formula:
N flat plate =∑N i B, wherein B is the number of times of detection; b=c″ x h, which is the period of detection.
8. The intelligent detection system according to claim 7, wherein the central processing unit is internally provided with an oxygen concentration determination value N';
when N is Flat plate Not less than N', the alarm unit is not started;
when N is Flat plate And < N', the alarm unit is started.
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| CN202310725567.4A CN116466047B (en) | 2023-06-19 | 2023-06-19 | Intelligent detection system |
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| KR102117836B1 (en) * | 2019-11-15 | 2020-06-02 | 서전엔지니어링(주) | Building automatic control system for indoor air quality management |
| CN115823713A (en) * | 2023-02-16 | 2023-03-21 | 山东科技职业学院 | Air detection method based on computer control |
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2023
- 2023-06-19 CN CN202310725567.4A patent/CN116466047B/en active Active
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| US20050241417A1 (en) * | 2004-05-03 | 2005-11-03 | Kay Charles G | Air sampler with integrated airflow sensing |
| US20100168922A1 (en) * | 2008-12-26 | 2010-07-01 | Lg Electronics Inc. | Air conditioner and method of operating the same |
| CN105869547A (en) * | 2016-04-12 | 2016-08-17 | 华信咨询设计研究院有限公司 | Rotary grille unit type windproof advertising board and windproof method thereof |
| KR102117836B1 (en) * | 2019-11-15 | 2020-06-02 | 서전엔지니어링(주) | Building automatic control system for indoor air quality management |
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