CN219935790U - Air pipe carbon dioxide detector - Google Patents
Air pipe carbon dioxide detector Download PDFInfo
- Publication number
- CN219935790U CN219935790U CN202321293614.4U CN202321293614U CN219935790U CN 219935790 U CN219935790 U CN 219935790U CN 202321293614 U CN202321293614 U CN 202321293614U CN 219935790 U CN219935790 U CN 219935790U
- Authority
- CN
- China
- Prior art keywords
- sleeve
- output end
- air
- connecting sleeve
- carbon dioxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 35
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 35
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000006012 detection of carbon dioxide Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses an air duct carbon dioxide detector which comprises an air inlet pipe, an air outlet pipe and a detector body capable of detecting carbon dioxide concentration, wherein the air inlet pipe comprises a first input end communicated with an air duct and a first output end communicated with the detector body, the air outlet pipe comprises a second output end communicated with an air duct and a second input end communicated with the detector body, the first input end is arranged at one side of the second output end, which is close to the upstream of the air duct, the distance between the first input end and the second output end is larger than the length of the detector body, and the carbon dioxide detector further comprises an air pump so that air in the air duct is discharged to the air duct after passing through the air inlet pipe, the detector body and the air outlet pipe in sequence. The utility model provides an air duct carbon dioxide detector, which can prevent output gas from entering the carbon dioxide detector again and improve detection accuracy.
Description
Technical Field
The utility model relates to the technical field of carbon dioxide detectors, in particular to an air duct carbon dioxide detector.
Background
Some existing carbon dioxide detectors are installed on the air pipe to detect the carbon dioxide concentration of air in the air pipe. See the patent of application number CN2018204300704, when the carbon dioxide detector is installed, in order to reduce the trompil on the tuber pipe, adopt a probe to drain the gas in the tuber pipe, be provided with the inlet channel in the probe and give vent to anger the pipeline, inlet channel and the pipeline that gives vent to anger are close to, lead to the inlet end of inlet channel and the end distance that gives vent to anger of pipeline to be close, the gas of the end output of giving vent to anger, get into the inlet channel again easily to make the result of the detection of carbon dioxide detector inaccurate.
Disclosure of Invention
The utility model provides an air duct carbon dioxide detector, which aims to solve the defect that the gas output by the air outlet end of the existing carbon dioxide detector easily enters an air inlet pipeline again so as to lead the detection result to be inaccurate.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an tuber pipe carbon dioxide detector, including the intake pipe, the outlet duct, and the detector body of detectable carbon dioxide concentration, the intake pipe includes the first input of tuber pipe intercommunication, and the first output of detector body intercommunication, the outlet duct includes the second output of communicating with the tuber pipe, and the second input of detector body intercommunication, first input sets up one side that the second output is close to the upper reaches of tuber pipe, and the distance between first input and the second output is greater than the length of detector body, the carbon dioxide detector still includes the air pump, in order to make the gaseous in the tuber pipe discharge to the tuber pipe after intake pipe, the detector body, the outlet duct.
In the utility model, the air of the air pipe is output from the second output end after passing through the detector body, the second output end is arranged at one side of the first input end, which is close to the downstream of the air pipe, so that the air output by the second output end is prevented from entering the air inlet pipe again, and in addition, when the distance between the first input end and the second output end is larger than the length of the detector body, the air output by the second output end is further prevented from entering the air inlet pipe, thereby improving the detection accuracy.
Further, the first input end is detachably connected with the air pipe through a first connecting piece; the air pipe is provided with a first connecting hole, the first connecting piece comprises a first connecting sleeve penetrating through the first connecting hole, the inner end of the first connecting sleeve is provided with a plurality of cutting grooves, so that the inner end of the first connecting sleeve is divided into a plurality of first expansion petals which can be prevented from being pulled out of the first connecting hole after being bent outwards, the first input end of the air inlet pipe penetrates through the first connecting sleeve and is in threaded connection with the first connecting sleeve, the periphery of the inner end of the first input end is fixedly connected with a first driving block, one side of the first driving block, which is close to the first connecting hole, is provided with a first conical surface which can drive the first expansion petals to bend outwards when the first driving block moves towards the first connecting hole relative to the first connecting sleeve, and the first connecting piece further comprises a first fixing nut which is in threaded connection with the first connecting sleeve to fix the first connecting sleeve on the air pipe.
In the utility model, the air inlet pipe is detachably connected with the air pipe through the first connecting piece, so that the air inlet pipe is convenient to assemble and disassemble on the air pipe.
Further, a first rubber gasket is arranged between the first fixing nut and the air pipe.
Through the arrangement, gas in the air pipe can be prevented from leaking from between the first connecting hole and the first connecting sleeve.
Further, the outer end fixedly connected with of first adapter sleeve is convenient for fix the second fixation nut of first adapter sleeve, and first input and second output are perpendicular.
Through the arrangement, when the first input end is rotated, one hand is connected with the second fixing nut through the wrench, the first connecting sleeve is prevented from rotating, and the other hand rotates the first input end through the first output end, so that the first input end and the first connecting sleeve relatively rotate.
Further, the second output end is detachably connected with the air pipe through a second connecting piece; the air pipe is provided with a second connecting hole, the second connecting piece comprises a second connecting sleeve penetrating through the second connecting hole, the inner end of the second connecting sleeve is provided with a plurality of cutting grooves, so that the inner end of the second connecting sleeve is divided into a plurality of second expansion valves which can prevent the second connecting sleeve from being pulled out of the second connecting hole after being bent outwards, a second output end of the air pipe penetrates through the second connecting sleeve and is in threaded connection with the second connecting sleeve, a second driving block is fixedly connected with the periphery of the inner end of the second output end, one side, close to the second connecting hole, of the second driving block is provided with a second conical surface which can drive the second expansion valves to bend outwards when the second driving block moves towards the second connecting hole relative to the second connecting sleeve, and the second connecting piece further comprises a third fixing nut which is in threaded connection with the second connecting sleeve to fix the second connecting sleeve on the air pipe.
In the utility model, the air outlet pipe is detachably connected with the air pipe through the second connecting piece, so that the air outlet pipe is convenient to assemble and disassemble on the air pipe. The principle refers to the disassembly and assembly of the air inlet pipe.
Further, a second rubber gasket is arranged between the first fixing nut and the air pipe.
Through the arrangement, gas in the air pipe can be prevented from leaking from between the second connecting hole and the second connecting sleeve.
Further, the outer end of the second connecting sleeve is fixedly connected with a fourth fixing nut which is convenient for fixing the second connecting sleeve, and the second output end is perpendicular to the second input end.
Through the arrangement, when the second output end is rotated, one hand is connected with the fourth fixing nut through the wrench, the second connecting sleeve is prevented from rotating, and the other hand rotates the second output end through the second input end, so that the second output end and the second connecting sleeve relatively rotate.
Further, the detector body comprises a shell, a third input end fixedly connected to one end of the shell, a third output end fixedly connected to the other end of the shell, and a sensor capable of detecting carbon dioxide concentration, wherein the third input end is communicated with the third output end through the sensor, the third input end and the third output end are coaxially arranged, the first output end and the second input end are coaxially arranged, the first output end and the third input end are communicated through a first quick release sleeve, one end of the first quick release sleeve is sleeved on the first output end and is in sliding connection with the first output end, the other end of the first quick release sleeve is sleeved on the third input end, and the first quick release sleeve is connected with the first output end through a first spring so as to prevent the first quick release sleeve from being separated from the third output end; the second input end and the third output end are communicated through a second quick-release sleeve, one end of the second quick-release sleeve is sleeved on the second input end and is in sliding connection with the second input end, the other end of the second quick-release sleeve is sleeved on the third output end, and the second quick-release sleeve is connected with the second input end through a second spring so as to prevent the second quick-release sleeve from being disconnected with the third output end.
According to the utility model, the detector body can be quickly disassembled and assembled by sliding the first quick-release sleeve and the second quick-release sleeve, so that the detector body is convenient to maintain.
Drawings
Fig. 1 is a schematic diagram of a carbon dioxide detector according to an embodiment.
Fig. 2 is a schematic view of the air inlet pipe and the air outlet pipe when they are installed.
Fig. 3 is an enlarged view at a of fig. 2.
Detailed Description
The technical scheme of the utility model is further specifically described below through examples and with reference to the accompanying drawings.
Referring to fig. 1 to 3, an air duct carbon dioxide detector comprises an air inlet pipe 11, an air outlet pipe 12 and a detector body 13 capable of detecting carbon dioxide concentration, wherein the air inlet pipe 11 comprises a first input end 111 communicated with an air duct 21 and a first output end 112 communicated with the detector body 13, the air outlet pipe 12 comprises a second output end 121 communicated with the air duct 21 and a second input end 122 communicated with the detector body 13, the first input end 111 is arranged on one side, close to the upstream of the air duct 21, of the second output end 121, a distance between the first input end 111 and the second output end 121 is larger than the length of the detector body 13, and the carbon dioxide detector further comprises an air pump 14 so that air in the air duct 21 is discharged to the air duct 21 after passing through the air inlet pipe 11, the detector body 13 and the air outlet pipe 12 in sequence.
In the utility model, the air of the air duct 21 passes through the detector body 13 and is output from the second output end 121, the second output end 121 is arranged at one side of the first input end 111, which is close to the downstream of the air duct 21, so that the air output by the second output end 121 is prevented from entering the air inlet pipe 11 again, and in addition, when the distance between the first input end 111 and the second output end 121 is larger than the length of the detector body 13, the air output by the second output end 121 is further prevented from entering the air inlet pipe 11, thereby improving the detection accuracy.
Specifically, during detection, the air pump 14 is operated to extract air in the air duct 21, and the air in the air duct 21 sequentially passes through the first input end 111, the first output end 112, the detector body 13, the second input end 122 and the second output end 121 and then is discharged out of the air return duct 21, and when the air passes through the detector body 13, the detector body 13 detects the concentration of carbon dioxide. In addition, the length of the detector body 13 is the distance between opposite ends of the detector body 13 in the extending direction of the duct 21, that is, the distance between the end of the detector body 13 near the upstream of the duct 21 and the end near the downstream of the duct 21.
As one implementation, the first input 111 is detachably connected by a first connection and the air duct 21; the air duct 21 is provided with a first connection hole 22, the first connection piece comprises a first connection sleeve 151 penetrating through the first connection hole 22, the inner end of the first connection sleeve 151 is provided with a plurality of cutting grooves, so that the inner end of the first connection sleeve 151 is divided into a plurality of first expansion flaps 1511 which can prevent the first connection sleeve 151 from being pulled out of the first connection hole 22 after being bent outwards, a first input end 111 of the air inlet pipe 11 penetrates through the first connection sleeve 151 and is in threaded connection with the first connection sleeve 151, the periphery of the inner end of the first input end 111 is fixedly connected with a first driving block 113, one side of the first driving block 113 close to the first connection hole 22 is provided with a first conical surface 114 which can drive the first expansion flaps 1511 to bend outwards when the first driving block 113 moves towards the first connection sleeve 151 towards the first connection hole 22, and the first connection piece further comprises a first fixing nut 152 which is in threaded connection with the first connection sleeve 151 to fix the first connection sleeve 151 on the air duct 21.
In the utility model, the air inlet pipe 11 is detachably connected with the air pipe 21 through the first connecting piece, so that the air inlet pipe 11 is convenient to assemble and disassemble on the air pipe 21.
Specifically, during installation, the first connecting hole 22 is drilled on the air duct 21, then the first connecting sleeve 151 passes through the first connecting hole 22, the first expansion valve 1511 enters the air duct 21, see fig. 2 and 3, then the first input end 111 is rotated, after the first input end 111 and the first connecting sleeve 151 relatively rotate, the first input end 111 drives the first driving block 113 to move, the first driving block 113 moves towards the first connecting hole 22 relative to the first connecting sleeve 151, under the guiding action of the first conical surface 114, the first driving block 113 props the first expansion valve 1511, the first expansion valve 1511 is outwards bent, and then the first fixing nut 152 is screwed to fix the first connecting sleeve 151 on the air duct 21, see fig. 1. When the air inlet pipe 11 needs to be detached, the first fixing nut 152 is unscrewed, the first input end 111 is reversely rotated, the first driving block 113 moves back to the first connecting hole 22 relative to the first connecting sleeve 151, the first driving block 113 leaves from between the first expansion petals 1511, the first expansion petals 1511 can be bent inwards, and finally the first connecting sleeve 151 is pulled out of the first connecting hole 22.
As one implementation, a first rubber gasket 153 is provided between the first fixing nut 152 and the air duct 21.
With the above arrangement, the air in the air duct 21 can be prevented from leaking between the first connection hole 22 and the first connection sleeve 151.
As an implementation manner, the second fixing nut 154 for fixing the first connection sleeve 151 is fixedly connected to the outer end of the first connection sleeve 151, and the first input end 111 and the second output end 121 are perpendicular.
With the above arrangement, when the first input end 111 is rotated, one hand is connected to the second fixing nut 154 with a wrench to prevent the first coupling sleeve 151 from rotating, and the other hand rotates the first input end 111 through the first output end 112, thereby relatively rotating the first input end 111 and the first coupling sleeve 151.
As an implementation manner, the second output end 121 is detachably connected to the air duct 21 through a second connecting member; the air pipe 21 is provided with a second connecting hole 23, the second connecting piece comprises a second connecting sleeve 161 penetrating through the second connecting hole 23, the inner end of the second connecting sleeve 161 is provided with a plurality of cutting grooves, so that the inner end of the second connecting sleeve 161 is divided into a plurality of second expansion flaps 1611 which can prevent the second connecting sleeve 161 from being pulled out of the second connecting hole 23 after being bent outwards, a second output end 121 of the air pipe 12 penetrates through the second connecting sleeve 161 and is in threaded connection with the second connecting sleeve 161, the periphery of the inner end of the second output end 121 is fixedly connected with a second driving block 123, one side of the second driving block 123, which is close to the second connecting hole 23, is provided with a second conical surface 124 which can drive the second expansion flaps 1611 to bend outwards when the second driving block 123 moves towards the second connecting sleeve 161 relative to the second connecting sleeve 23, and the second connecting piece also comprises a third fixing 162 which is in threaded connection with the second connecting sleeve 161 to fix the second connecting sleeve 161 on the air pipe 21.
In the utility model, the air outlet pipe 12 is detachably connected with the air pipe 21 through the second connecting piece, so that the air outlet pipe 12 is convenient to assemble and disassemble on the air pipe 21. The principle refers to the disassembly and assembly of the air intake pipe 11.
As one implementation, a second rubber spacer 163 is provided between the first fixing nut 152 and the air duct 21.
With the above arrangement, the air in the air duct 21 is prevented from leaking between the second connection hole 23 and the second connection sleeve 161.
As an implementation manner, the outer end of the second connecting sleeve 161 is fixedly connected with a fourth fixing nut 164 which is convenient for fixing the second connecting sleeve 161, and the second output end 121 is perpendicular to the second input end 122.
With the above arrangement, when the second output terminal 121 is rotated, one hand is connected to the fourth fixing nut 164 with a wrench to prevent the second connecting sleeve 161 from rotating, and the other hand rotates the second output terminal 121 through the second input terminal 122, thereby relatively rotating the second output terminal 121 and the second connecting sleeve 161.
As one implementation manner, the detector body 13 includes a housing 131, a third input end 132 fixedly connected to one end of the housing 131, a third output end 133 fixedly connected to the other end of the housing 131, and a sensor 134 capable of detecting carbon dioxide concentration, where the third input end 132 is communicated with the third output end 133 through the sensor 134, the third input end 132 and the third output end 133 are coaxially arranged, the first output end 112 and the second input end 122 are coaxially arranged, the first output end 112 and the third input end 132 are communicated through a first quick release sleeve 17, one end of the first quick release sleeve 17 is sleeved on the first output end 112 and slidingly connected with the first output end 112, the other end of the first quick release sleeve 17 is sleeved on the third input end 132, and the first quick release sleeve 17 and the first output end 112 are connected through a first spring 171 to prevent the first quick release sleeve 17 and the third output end 133 from being released; the second input end 122 and the third output end 133 are communicated through the second quick release sleeve 18, one end of the second quick release sleeve 18 is sleeved on the second input end 122 and is in sliding connection with the second input end 122, the other end of the second quick release sleeve 18 is sleeved on the third output end 133, and the second quick release sleeve 18 and the second input end 122 are connected through a second spring 181 so as to prevent the second quick release sleeve 18 from being separated from the third output end 133.
According to the utility model, the detector body 13 can be quickly assembled and disassembled by sliding the first quick-release sleeve 17 and the second quick-release sleeve 18, so that the detector body 13 is convenient to maintain.
Specifically, when the detector body 13 needs to be detached, the first quick release sleeve 17 is slid to disengage the first quick release sleeve 17 from the third input end 132, the first spring 171 is compressed, in addition, the second quick release sleeve 18 is slid to disengage the second quick release sleeve 18 from the third output end 133, and the second spring 181 is compressed, at this time, the detector body 13 can be removed from between the air inlet pipe 11 and the air outlet pipe 12; when the detector body is installed, the detector body 13 is placed between the first quick release sleeve 17 and the second quick release sleeve 18, the first spring 171 resets and enables the first quick release sleeve 17 to be sleeved on the third input end 132 again, and the second spring 181 resets and enables the second quick release sleeve 18 to be sleeved on the third output end 133 again.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (8)
1. The utility model provides an tuber pipe carbon dioxide detector, its characterized in that includes intake pipe, outlet duct to and detectable carbon dioxide concentration's detector body, the intake pipe include with the first input of tuber pipe intercommunication, with the first output of detector body intercommunication, the outlet duct include with the second output of tuber pipe intercommunication, with the second input of detector body intercommunication, first input sets up the second output is close to one side of the upper reaches of tuber pipe, just first input with distance between the second output is greater than the length of detector body, the carbon dioxide detector still includes the air pump, so that gaseous in the tuber pipe passes through in proper order the intake pipe the detector body behind the outlet duct to the tuber pipe is discharged.
2. The air duct carbon dioxide detector of claim 1, wherein the first input end is detachably connected to the air duct via a first connector;
the air pipe is provided with a first connecting hole, the first connecting piece comprises a first connecting sleeve penetrating through the first connecting hole, a plurality of cutting grooves are formed in the inner end of the first connecting sleeve, the inner end of the first connecting sleeve is divided into a plurality of outwards bent first expansion flaps capable of preventing the first connecting sleeve from being pulled out of the first connecting hole, a first input end of the air inlet pipe penetrates through the first connecting sleeve and is in threaded connection with the first connecting sleeve, a first driving block is fixedly connected to the periphery of the inner end of the first input end, one side, close to the first connecting hole, of the first driving block is provided with a first conical surface capable of driving the first expansion flaps to outwards bend when the first driving block moves towards the first connecting hole relative to the first connecting sleeve, and the first connecting piece further comprises a first fixing nut in threaded connection with the first connecting sleeve so as to fix the first connecting sleeve on the air pipe.
3. The air duct carbon dioxide detector as set forth in claim 2, wherein a first rubber gasket is disposed between the first fixing nut and the air duct.
4. The air duct carbon dioxide detector according to claim 2, wherein the outer end of the first connecting sleeve is fixedly connected with a second fixing nut which is convenient for fixing the first connecting sleeve, and the first input end is perpendicular to the second output end.
5. The air duct carbon dioxide detector of claim 2, wherein the second output end is detachably connected to the air duct via a second connector;
the air pipe is provided with a second connecting hole, the second connecting piece comprises a second connecting sleeve penetrating through the second connecting hole, a plurality of cutting grooves are formed in the inner end of the second connecting sleeve, the inner end of the second connecting sleeve is divided into a plurality of second expansion petals which can be prevented from being pulled out of the second connecting hole after being bent outwards, a second output end of the air pipe penetrates through the second connecting sleeve and is in threaded connection with the second connecting sleeve, a second driving block is fixedly connected to the periphery of the inner end of the second output end, a second conical surface which can drive the second expansion petals to be bent outwards when the second driving block moves towards the second connecting hole relative to the second connecting sleeve is arranged on one side of the second driving block, and the second connecting piece further comprises a third fixing nut which is in threaded connection with the second connecting sleeve to fix the second connecting sleeve on the air pipe.
6. The air duct carbon dioxide detector of claim 5, wherein a second rubber gasket is disposed between the first fixing nut and the air duct.
7. The air duct carbon dioxide detector according to claim 5, wherein a fourth fixing nut which is convenient for fixing the second connecting sleeve is fixedly connected to the outer end of the second connecting sleeve, and the second output end is perpendicular to the second input end.
8. The air duct carbon dioxide detector according to claim 1, wherein the detector body comprises a shell, a third input end fixedly connected to one end of the shell, a third output end fixedly connected to the other end of the shell, and a sensor capable of detecting carbon dioxide concentration, the third input end is communicated with the third output end through the sensor, the third input end and the third output end are coaxially arranged, the first output end and the second input end are coaxially arranged, the first output end and the third input end are communicated through a first quick release sleeve, one end of the first quick release sleeve is sleeved on the first output end and is in sliding connection with the first output end, the other end of the first quick release sleeve is sleeved on the third input end, and the first quick release sleeve is connected with the first output end through a first spring so as to prevent the first quick release sleeve and the third output end from being separated;
the second input end is communicated with the third output end through a second quick-release sleeve, one end of the second quick-release sleeve is sleeved on the second input end and is in sliding connection with the second input end, the other end of the second quick-release sleeve is sleeved on the third output end, and the second quick-release sleeve is connected with the second input end through a first spring so as to prevent the second quick-release sleeve from being separated from the third output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321293614.4U CN219935790U (en) | 2023-05-25 | 2023-05-25 | Air pipe carbon dioxide detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321293614.4U CN219935790U (en) | 2023-05-25 | 2023-05-25 | Air pipe carbon dioxide detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219935790U true CN219935790U (en) | 2023-10-31 |
Family
ID=88498207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321293614.4U Active CN219935790U (en) | 2023-05-25 | 2023-05-25 | Air pipe carbon dioxide detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219935790U (en) |
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2023
- 2023-05-25 CN CN202321293614.4U patent/CN219935790U/en active Active
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