CN208780623U - A kind of infrared gas sensor and infrared gas detection device - Google Patents
A kind of infrared gas sensor and infrared gas detection device Download PDFInfo
- Publication number
- CN208780623U CN208780623U CN201821330028.1U CN201821330028U CN208780623U CN 208780623 U CN208780623 U CN 208780623U CN 201821330028 U CN201821330028 U CN 201821330028U CN 208780623 U CN208780623 U CN 208780623U
- Authority
- CN
- China
- Prior art keywords
- infrared
- gas
- detector
- light supply
- infrared light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model relates to sensor technical field, a kind of infrared gas sensor and infrared gas detection device are provided.The infrared gas sensor that the embodiments of the present invention provide includes infrared light supply, the first infrared detector, control mechanism and infrared absorption pipe.Infrared light supply and the first infrared detector are electrically connected with control mechanism respectively, and the infrared light that infrared light supply issues slants air inlet chamber with predetermined angle, are propagated by the reflection of air chamber wall, are absorbed by the indoor under test gas of gas.First infrared detector carries out analysis by receiving the infrared light in gas chamber to obtain under test gas concentration signal.Since infrared light supply slants air inlet chamber with predetermined angle, when infrared light supply is constant at a distance from the axis direction of gas chamber with the first infrared detector, by the way that different predetermined angles is arranged, different equivalent optical paths can get, to change range ability and detection sensitivity.
Description
Technical field
The utility model relates to sensor technical fields, in particular to a kind of infrared gas sensor and infrared gas
Body detection device.
Background technique
Non-dispersion infrared (NDIR) gas sensor is as a kind of fast and accurately gas analysis technology, especially continuous
It is very universal in pollutant monitoring system (CEMS) and motor-vehicle tail-gas detection application.
Existing non-dispersion infrared (NDI R) gas sensor, when being detected for specific gas, selecting one has spy
The spectrum channel absorbed is levied as Measurement channel, the channel of a not no characteristic absorption is as reference channel.It is used in measurement process
The absorbance value of Measurement channel detection gas, to calculate gas concentration, with reference channel come the optical energy attenuation of detection system and
Fluctuation, is modified Measurement channel.The structure type that existing small-sized non-dispersion infrared gas sensor mainly uses is red
Enter straight pipe type gas chamber after the light that outer light source issues is modulated, signal acquired using binary channels detector in the other end of gas chamber,
One channel of binary channels detector is reference channel, another is Measurement channel.However existing this infrared-gas sensing
In the structure type of device, the light path of gas chamber be it is fixed, corresponding range ability and detection sensitivity fix, and gas with various
Absorbability and concentration range are different, and will lead to cannot obtain optimum detection effect.
Utility model content
First of the utility model is designed to provide a kind of infrared gas sensor, in the prior art red to improve
Outer gas sensor range ability and detection sensitivity are fixed, and optimum detection effect cannot be obtained when detecting to gas with various
The problem of.
Second of the utility model is designed to provide a kind of infrared gas detection device comprising above-mentioned infrared gas
Body sensor.
The embodiments of the present invention are achieved in that
A kind of infrared gas sensor comprising infrared light supply, the first infrared detector, control mechanism and infrared absorption
Pipe；The infrared light supply is electrically connected with the control mechanism respectively with first infrared detector；
The gas chamber being in communication with the outside, the infrared light that the infrared light supply issues are offered in the infrared absorption pipe
The gas chamber is slanted through with predetermined angle；First infrared detector is arranged outside the infrared absorption pipe, for receiving
State the infrared light in gas chamber.
In one embodiment of the utility model:
Offer at least two detection windows on above-mentioned infrared absorption pipe, detection window described in any two of them is to described infrared
The distance of light source is different；First infrared detector is received described red in the gas chamber by detection window described in one of them
UV light.
In one embodiment of the utility model:
Light transmitting sheet is provided on above-mentioned detection window, the light transmitting sheet is for preventing gas from passing through the detection window.
In one embodiment of the utility model:
Above-mentioned infrared gas sensor further includes the second infrared detector, second infrared detector and the control machine
Structure electrical connection；Second infrared detector and first infrared detector pass through respectively the detection window of different location into
Row detection.
In one embodiment of the utility model:
Above-mentioned infrared light supply and first infrared detector are oppositely arranged on the both ends of the infrared absorption pipe；Described
Middle position of two infrared detectors between the infrared light supply and first infrared detector.
In one embodiment of the utility model:
Gold-plated reflectance coating is provided on the inner wall of above-mentioned gas chamber.
In one embodiment of the utility model:
Plating aluminium mirror coating is provided on the inner wall of above-mentioned gas chamber.
In one embodiment of the utility model:
Above-mentioned first infrared detector is binary channels or multi-channel heat release electric detector.
In one embodiment of the utility model:
Above-mentioned infrared light supply is electrical modulation infrared light supply.
A kind of infrared-gas detection device, including any one of the above infrared gas sensor.
The beneficial effect of the utility model embodiment includes:
The embodiments of the present invention provide infrared gas sensor comprising infrared light supply, the first infrared detector,
Control mechanism and infrared absorption pipe.Infrared light supply and the first infrared detector are electrically connected with control mechanism respectively, control mechanism
It controls infrared light supply to shine, and the electric signal for issuing the first infrared detector is acquired and handles, it is dense to export tested gas
Spend signal.The gas chamber being in communication with the outside is offered in infrared absorption pipe, under test gas enters gas chamber and will be filled with gas chamber.Infrared light
The infrared light that source issues slants air inlet chamber with predetermined angle, is propagated by the reflection of air chamber wall, by the indoor under test gas of gas
It absorbs.First infrared detector is arranged outside infrared absorption pipe, by receiving the infrared light in gas chamber, analyze obtaining
Obtain under test gas concentration signal.Since infrared light supply and predetermined angle slant air inlet chamber, when infrared light supply and the first infrared acquisition
When device is constant along the distance of the axis direction of gas chamber, by the different predetermined angle of setting, different equivalent optical paths can get, from
And change range ability and detection sensitivity.
Infrared gas detection device provided by the utility model has including above-mentioned infrared gas sensor, therefore also
By the way that different predetermined angle is arranged, different equivalent optical paths can get, to change having for range ability and detection sensitivity
Beneficial effect.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram for the infrared gas sensor that the utility model embodiment 1 provides；
Fig. 2 is the structural schematic diagram for the infrared gas sensor middle infrared absorption pipe that the utility model embodiment 1 provides；
Fig. 3 is the overall structure diagram for the infrared gas sensor that the utility model embodiment 1 provides.
Icon: 010- infrared gas sensor；100- infrared absorption pipe；110- gas chamber；111- air inlet；112- exhaust
Hole；120- detects window；130- light transmitting sheet；200- infrared light supply；210- infrared light；The first infrared detector of 310-；320-
Two infrared detectors；400- control mechanism.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the utility model embodiment, it should be noted that term " first ", " second " etc. are only used for distinguishing
Description, is not understood to indicate or imply relative importance.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in utility model.
Embodiment 1
Fig. 1 is the structural schematic diagram of infrared gas sensor 010 provided in this embodiment.Fig. 1 is please referred to, the present embodiment mentions
For a kind of infrared gas sensor 010 comprising infrared light supply 200, the first infrared detector 310, control mechanism 400 and red
Outer absorption tube 100.Infrared light supply 200 and the first infrared detector 310 are electrically connected with control mechanism 400 respectively, control mechanism 400
It controls infrared light supply 200 to shine, and the electric signal for issuing the first infrared detector 310 is acquired and handles, output is tested
Gas concentration signal.The gas chamber 110 being in communication with the outside is offered in infrared absorption pipe 100, under test gas enters gas chamber 110 and will
Full of gas chamber 110.The infrared light 210 that infrared light supply 200 issues slants air inlet chamber 110 with predetermined angle, by gas chamber 110
The reflection of wall is propagated, and is absorbed by the under test gas in gas chamber 110.First infrared detector 310 is arranged in infrared absorption pipe 100
Outside, by receiving the infrared light 210 in gas chamber 110, analysis is carried out to obtain under test gas concentration signal.Due to infrared light
Source 200 and predetermined angle slant air inlet chamber 110, when infrared light supply 200 and the first infrared detector 310 are along the axis of gas chamber 110
When the distance in direction is constant, by the way that different predetermined angles is arranged, different equivalent optical paths can get, to change range model
It encloses, and then promotes detection sensitivity.
Infrared gas sensor 010 provided in this embodiment is further described below:
Fig. 2 is the structural schematic diagram of 010 middle infrared absorption pipe 100 of infrared gas sensor provided in this embodiment.It please join
According to Fig. 2, in the present embodiment, infrared absorption pipe 100 is generally cylindrical, along the axis of infrared absorption pipe 100 be provided with outside
The gas chamber 110 of boundary's connection.The both ends of gas chamber 110 are respectively arranged with air inlet 111 and gas vent 112, in use, under test gas is logical
It crosses air inlet 111 and enters gas chamber 110, part under test gas leaves gas chamber 110 by gas vent 112 after full of gas chamber 110.It will
Air inlet 111 and gas vent 112 are separately positioned on the both ends of gas chamber 110, can fully ensure that the under test gas into gas chamber 110
Gas chamber 110 can be completely filled with.
Further, it in order to improve reflectivity, obtain better reflecting effect, is provided on the inner wall of gas chamber 110 gold-plated
Reflectance coating.It should be understood that in other embodiments, it can also according to the demand of user, by being arranged on 110 side wall of gas chamber
Aluminium mirror coating is plated, reflecting effect is improved.
At least two detection windows 120 are offered on infrared absorption pipe 100, any two of them detects window 120 and arrives infrared light
The distance in source 200 is different.In the present embodiment, it opens up there are two window 120 is detected, is located at infrared on infrared absorption pipe 100
First infrared detector 310 is mounted on by the end face of 100 one end of the absorption tube and middle part of infrared absorption pipe 100, when use
It detects at window 120, the infrared light 210 in gas chamber 110 is detected by detecting window 120.Two detection windows 120 are arranged
The different position at a distance from infrared light supply 200, when the first infrared detector 310 is mounted at different detection windows 120, first
Infrared detector 310 can obtain different equivalent optical paths, to obtain different range abilities.
It should be noted that in the present embodiment, the quantity of detection window 120 is two, it is possible to understand that, it is specific real at other
It applies in example, can also according to the demand of user, the quantity of specific setting detection window 120, such as will test the quantity setting of window 120
It is three or four.
Also it should be noted that in the present embodiment, two detection windows 120 are separately positioned on 100 one end of infrared absorption pipe
On the end face and middle part of infrared absorption pipe 100, it is possible to understand that, it, can also be according to user's in other specific embodiments
Demand, the position of specific setting detection window 120, such as will test window 120 and be arranged on the cylindrical surface of infrared absorption pipe 100,
Guarantee that any two of them detection window 120 is different to the distance of infrared light supply 200.
In order to guarantee that under test gas can be completely filled with gas chamber 110, will not be pierced by from detection window 120, further, inspection
It surveys at window 120 and is additionally provided with light transmitting sheet 130, light transmitting sheet 130 is transmitance in the spectral region of the work of infrared gas sensor 010
Higher sheet glass.First infrared detector 310 is arranged outside infrared absorption pipe 100, the infrared light conducted in gas chamber 110
210 are pierced by by sheet glass, are received by the gas photosurface of the first infrared detector 310, to obtain the concentration letter of under test gas
Number.
It should be noted that in the present embodiment, the material of light transmitting sheet 130 is the spectrum that infrared gas sensor 010 works
The higher glass of transmitance in range, it is possible to understand that, in other embodiments, it can also select red according to the demand of user
The higher other materials of transmitance is as light transmitting sheet 130, such as zinc selenide in the spectral region that outer gas sensor 010 works,
Calcirm-fluoride etc..
Fig. 1 is please referred to, in the present embodiment, infrared gas sensor 010 further includes the second infrared detector 320, and second
Infrared detector 320 is electrically connected with control mechanism 400, and the first infrared detector 310 and the second infrared detector 320 are set respectively
It sets at the detection window 120 of different location, since the distance of any two detection window 120 to infrared light supply 200 is different, the
One infrared detector 310 and the second infrared detector 320 can obtain different equivalent optical paths, to obtain different range models
It encloses.When detecting to same under test gas, the infrared detector of same model can be selected as the first infrared detector
310 and second infrared detector 320, the first infrared detector 310 and the second infrared detector 320 under test gas is carried out simultaneously
Detection, realizes different range ability and detection sensitivity.When being detected simultaneously to two kinds of gases, can according to need,
Select the infrared detector of gas with various as the first infrared detector 310 and the second infrared detector 320, so that first is infrared
Detector 310 and the second infrared detector 320 can obtain different equivalent optical paths, so that it is best to obtain two kinds of gases can
Range ability and detection sensitivity.
It should be noted that in the present embodiment, it is provided only with the first infrared detector 310 and the second infrared detector 320,
It should be understood that in other embodiments, the needs of in order to meet multiple gases while detect, can be selected according to gaseous species
Suitable infrared detector is as third infrared detector, the 4th infrared detector etc..
In the present embodiment, the first infrared detector 310 is binary channels pyroelectric detector, wherein a channel is as ginseng
Channel is examined, another channel is as Measurement channel.Binary channels pyroelectric detector is electrically connected with control mechanism 400, control mechanism
The collected signal of 400 pairs of binary channels pyroelectric detectors carries out same selection binary channels pyroelectric detector, while will wherein
One channel is as reference channel, and another channel is as Measurement channel.
It should be noted that do not limit the type of the first infrared detector 310 and the second infrared detector 320 herein
System, it is possible to understand that, in other specific embodiments, multi-channel heat release electric detector can also be selected according to the demand of user,
And using one of channel as reference channel, rest channels are as Measurement channel.
Further, infrared light supply 200 is electrical modulation infrared light supply 200.Electrical modulation infrared light supply 200 is in current or voltage
Adjustment under, the intensity of the infrared light 210 of sending is able to carry out periodic variation.Electrical modulation infrared light supply 200 and control
Mechanism 400 is electrically connected, and control mechanism 400 is to electrical modulation infrared light supply 200 and the first infrared detector 310 and the second infrared spy
It surveys device 320 and synchronizes control.
Fig. 3 is the overall structure diagram of infrared gas sensor 010 provided in this embodiment.Referring to figure 3., this is practical
The infrared gas sensor 010 provided in novel embodiment, when in flue gas sulfur dioxide and carbon dioxide synchronize
When detection, since the content of sulfur dioxide in flue gas is far below the content of carbon dioxide, sulfur dioxide infrared acquisition is selected
Device can make dioxy as the second infrared detector 320 as the first infrared detector 310, carbon dioxide infrared detector
Change carbon infrared detector and obtain shorter light path, concentration range that can be detected is bigger；Sulfur dioxide infrared detector can obtain
Longest light path is obtained, to obtain highest detection sensitivity.
To sum up, the infrared gas sensor 010 that the embodiments of the present invention provide, can obtain a variety of equivalent optical paths,
Different range ability and detection sensitivity are realized when detecting to same gas so as to meet；To it is a variety of not
When congener gas is detected, corresponding infrared detector position can be set as needed, respectively obtain different equivalent
Light path can achieve itself optimal range ability and detection sensitivity, strong applicability, the scope of application to make every kind of gas
Extensively.Simultaneously as an infrared light supply 200, resource utilization is used only in infrared gas sensor 010 provided by the utility model
It is high.
The embodiments of the present invention additionally provide a kind of infrared gas detection device (not shown go out) comprising above-mentioned
Infrared gas sensor 010.Since the infrared gas detection device includes above-mentioned infrared gas sensor 010, also have
Have and realizes different range ability and detection sensitivity when detecting to same gas；To a variety of different types of gas
When body is detected, every kind of gas can achieve itself optimal range ability and detection sensitivity and resource utilization is high
Beneficial effect.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of infrared gas sensor characterized by comprising
Infrared light supply, the first infrared detector, control mechanism and infrared absorption pipe；The infrared light supply and described first infrared
Detector is electrically connected with the control mechanism respectively；
The gas chamber being in communication with the outside is offered in the infrared absorption pipe, the infrared light that the infrared light supply issues is with preset angle
Degree is slanted through the gas chamber；First infrared detector is arranged outside the infrared absorption pipe, for receiving in the gas chamber
The infrared light.
2. infrared gas sensor according to claim 1, it is characterised in that:
At least two detection windows, detection window described in any two of them to the infrared light supply are offered on the infrared absorption pipe
Distance it is different；First infrared detector receives the infrared light in the gas chamber by detection window described in one of them
Line.
3. infrared gas sensor according to claim 2, it is characterised in that:
Light transmitting sheet is provided on the detection window, the light transmitting sheet is for preventing gas from passing through the detection window.
4. infrared gas sensor according to claim 2, it is characterised in that:
The infrared gas sensor further includes the second infrared detector, second infrared detector and control mechanism electricity
Connection；The detection window that second infrared detector passes through different location with first infrared detector respectively is examined
It surveys.
5. infrared gas sensor according to claim 4, it is characterised in that:
The infrared light supply and first infrared detector are oppositely arranged on the both ends of the infrared absorption pipe；Described second is red
Middle position of the external detector between the infrared light supply and first infrared detector.
6. infrared gas sensor according to claim 1, it is characterised in that:
Gold-plated reflectance coating is provided on the inner wall of the gas chamber.
7. infrared gas sensor according to claim 1, it is characterised in that:
Plating aluminium mirror coating is provided on the inner wall of the gas chamber.
8. infrared gas sensor according to claim 1, it is characterised in that:
First infrared detector is binary channels or multi-channel heat release electric detector.
9. infrared gas sensor according to claim 8, it is characterised in that:
The infrared light supply is electrical modulation infrared light supply.
10. a kind of infrared-gas detection device, it is characterised in that:
The infrared-gas detection device includes such as the described in any item infrared gas sensors of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821330028.1U CN208780623U (en) | 2018-08-17 | 2018-08-17 | A kind of infrared gas sensor and infrared gas detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821330028.1U CN208780623U (en) | 2018-08-17 | 2018-08-17 | A kind of infrared gas sensor and infrared gas detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208780623U true CN208780623U (en) | 2019-04-23 |
Family
ID=66157260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821330028.1U Active CN208780623U (en) | 2018-08-17 | 2018-08-17 | A kind of infrared gas sensor and infrared gas detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208780623U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709868A (en) * | 2018-08-17 | 2018-10-26 | 青岛海纳光电环保有限公司 | A kind of infrared gas sensor and infrared gas detection device |
| CN110057773A (en) * | 2019-05-05 | 2019-07-26 | 南京信息工程大学 | A kind of infrared gas sensor system and the temperature-compensation method based on AACA-Elman algorithm |
-
2018
- 2018-08-17 CN CN201821330028.1U patent/CN208780623U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709868A (en) * | 2018-08-17 | 2018-10-26 | 青岛海纳光电环保有限公司 | A kind of infrared gas sensor and infrared gas detection device |
| CN110057773A (en) * | 2019-05-05 | 2019-07-26 | 南京信息工程大学 | A kind of infrared gas sensor system and the temperature-compensation method based on AACA-Elman algorithm |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108709868A (en) | A kind of infrared gas sensor and infrared gas detection device | |
| CN101105449B (en) | Double light source double sensitive element infra-red multiple gas detection sensor | |
| CN201063021Y (en) | Infrared multi-gas detecting sensor for double light sources and double sense organs | |
| CN102735633B (en) | Light path online calibration type cavity enhanced atmosphere trace gas detection system | |
| CN102095699A (en) | Multicomponent gas analyzer and gas analysis detection system | |
| US5793043A (en) | Method and apparatus for determining the alcohol concentration in a gas mixture | |
| CN208780623U (en) | A kind of infrared gas sensor and infrared gas detection device | |
| CN106290209A (en) | A kind of minimum discharge flue gas analyzer based on ultraviolet multiple reflections pool technology | |
| CN107328727B (en) | Flue gas analysis device and method based on ultraviolet difference technology | |
| EP3295151B1 (en) | Hollow fibre waveguide gas cells | |
| CN107643260B (en) | Wide-spectrum multi-parameter water quality monitoring system | |
| CN111829974B (en) | Rotary type air chamber infrared gas detection device | |
| US20050247878A1 (en) | Infrared gas sensor | |
| CN104374743A (en) | Turbidity sensor and turbidity measurement device | |
| CN103134771A (en) | Carbon monoxide (CO) concentration and visibility detector and detection method thereof | |
| CN108051404A (en) | A kind of sensor probe and gas-detecting device | |
| CN106770345A (en) | The near-infrared diffusing reflection detecting system and detection method of a kind of automatic correction | |
| CN111045200A (en) | Light reflection assembly for prolonging optical path | |
| CN209624376U (en) | A kind of gamut infrared gas sensor based on NDIR | |
| CN108885198A (en) | Use the gas detection of the wide scope of infrared gas detector | |
| KR100959611B1 (en) | Non-dispersive infrared gas analyzer having a lens | |
| CN117309764A (en) | Multi-gas concentration measuring instrument based on integral cavity | |
| CN205844193U (en) | Oil sensor in contactless water | |
| CN108761577A (en) | Forward scattering visibility meter outfield calibrating installation based on integrating sphere and method | |
| CN109781639B (en) | Device and method for simultaneously detecting sulfur dioxide and nitrogen dioxide in ambient air |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 266000 379 Hedong Road, Qingdao high tech Zone, Shandong Patentee after: Qingdao Laoying Haina Photoelectric Environmental Protection Group Co., Ltd. Address before: 266000 379 Hedong Road, hi tech Zone, Chengyang District, Qingdao, Shandong Patentee before: Qingdao Haina Guangdian Environmental Protection Co., Ltd. |