Gas analysis device and gas analysis system

Abstract

The application discloses a gas analysis device and a gas analysis system. The gas analysis device comprises a shell assembly, an air inlet mechanism, a gas detection mechanism and an air extraction member. The shell assembly has a containing space; the air inlet mechanism comprises a first branch channel, a second branch channel and a vortex filter, the vortex filter is provided with an air inlet channel for communication with the outside world, the vortex filter is in communication with the first branch channel and the second branch channel respectively, and the vortex filter is configured to perform vortex separation on the to-be-analyzed gas transported by the air inlet channel; the gas detection mechanism is arranged in the containing space and is in communication with the first branch channel, and the gas detection mechanism is at least used for detecting the concentration of the to-be-analyzed gas transported through the first branch channel; and the air extraction member is arranged in the containing space and is connected with the gas detection mechanism and the second branch channel respectively. The application can solve the problems of low response frequency and detection precision of the gas analysis device in the prior art.

Description

Technical Field

[0001] This application relates to the field of gas detection technology, and more specifically, to a gas analysis device and a gas analysis system. Background Technology

[0002] A gas analyzer is an instrument used to detect and analyze the properties of gases, such as concentration. It is widely used in environmental monitoring, scientific research, and other fields. Through specific detection principles, it converts information about target components in a gas into quantifiable data, thereby enabling precise gas analysis.

[0003] Currently, gas analyzers typically extract the gas to be analyzed from the environment directly into the sampling tube during the sampling process. However, due to the complex composition of gases in the environment, impurities such as dust and water vapor in the air will enter the sampling tube along with the target analyte during direct extraction. Existing gas analyzers usually incorporate physical barrier structures such as filter membranes in the sampling tube to filter impurities. However, these physical barrier structures not only easily lead to impurity accumulation and blockage but also slow down gas flow. This causes rapidly changing high-frequency information such as air temperature and gas concentration to be weakened or even lost during transmission, reducing the response frequency and detection accuracy of the gas analyzer. Utility Model Content

[0004] The main objective of this application is to provide a gas analysis device and a gas analysis system to solve the problems of low response frequency and low detection accuracy in existing gas analysis devices.

[0005] According to one aspect of this application, a gas analysis apparatus is provided, comprising: A housing assembly having an accommodating space; An air intake mechanism is disposed on the housing assembly. The air intake mechanism includes a first branch channel, a second branch channel, and a vortex filter. The vortex filter is provided with an air intake channel for communicating with the outside. The vortex filter is connected to the first branch channel and the second branch channel respectively. The vortex filter is configured to perform vortex separation on the gas to be analyzed delivered by the air intake channel. A gas detection mechanism is disposed in the accommodating space and communicates with the first branch channel. The gas detection mechanism is at least used to detect the concentration of the gas to be analyzed transported through the first branch channel. An air extraction device is disposed in the accommodating space and connected to the gas detection mechanism and the second branch channel respectively.

[0006] Furthermore, the vortex filter element has a vortex cavity, a first branch port, and a second branch port. Both the first branch port and the second branch port are connected to the vortex cavity. The air intake channel is tangent to the peripheral sidewall of the vortex cavity and is connected to the vortex cavity. The first branch port is connected to the first branch channel, and the second branch port is connected to the second branch channel.

[0007] Furthermore, along the direction from the connection point between the first branch channel and the first branch port to the connection point between the second branch channel and the second branch port, the cross-sectional area of ​​the vortex cavity gradually decreases.

[0008] Furthermore, the first branch channel includes a first segment and a second segment, wherein the first segment is connected between the vortex filter and the second segment; A drying element is provided in the second section. The drying element has a flow channel that connects the first section and the gas detection mechanism. The drying element is configured to adsorb water vapor molecules in the gas to be analyzed and migrate them into the second section through diffusion. The pressure in the flow channel is lower than the pressure in the second segment.

[0009] Furthermore, the drying element includes a perfluorosulfonic acid tube.

[0010] Furthermore, a protective component is also provided in the second segment, and there is a gap between the protective component and the inner wall surface of the second segment. The protective component has a purging channel, and the drying component passes through the purging channel and is spaced apart from the inner wall surface of the purging channel. A purging element is provided within the accommodating space, and the purging element is connected to the protective element to at least blow air into the purging channel.

[0011] Furthermore, the gas detection mechanism includes: Support frame; The first detection channel is disposed on the support frame and is connected to the first branch channel through an air inlet. A second detection channel is disposed on the support frame, and the second detection channel is used at least for conveying reference gas; A light source generating assembly is disposed on the support frame. The light source generating assembly is connected to the first detection channel and the second detection channel respectively, and the light source generating assembly is configured to provide a light beam of a preset wavelength to the first detection channel and the second detection channel. The length of the first detection channel is equal to the length of the second detection channel, and the light intensity in the first detection channel is greater than the light intensity in the second detection channel.

[0012] Furthermore, the light source generating component includes: A light source, which is disposed on the support frame for generating light signals; A light-conducting component is disposed on the support frame. The light-conducting component includes a first light-conducting element and a second light-conducting element. The first light-conducting element is located between the light source and the first detection channel, and the second light-conducting element is disposed opposite to the first light-conducting element and the second detection channel, respectively. The first optical transducer is configured to receive the optical signal generated by the light source and divide the optical signal into a first optical path and a second optical path. The first optical path is transmitted to the first detection channel, and the second optical path is transmitted to the second optical transducer. The second optical transducer is configured to receive the second optical path transmitted by the first optical transducer and reflect the second optical path into the second detection channel.

[0013] Furthermore, the light source generating assembly also includes a temperature control component, which is disposed on the support frame and electrically connected to the light source. The temperature control component includes a thermoelectric cooler, a temperature sensor, and a control module. The thermoelectric cooler and the temperature sensor are both electrically connected to the control module. The thermoelectric cooler has a cooling mode and a heating mode. The temperature sensor is used to collect the temperature of the light source and transmit it to the control module. The control module controls the thermoelectric cooler to switch between the cooling mode and the heating mode based on the electrical signal transmitted by the temperature sensor.

[0014] On the other hand, this application also provides a gas analysis system, characterized in that the gas analysis system includes the gas analysis device described above.

[0015] This application connects the vortex filter to both the first and second channels, and the first channel to the gas detection mechanism. Thus, when the gas to be analyzed, containing impurities, enters the vortex filter through the inlet channel, centrifugal force generated by the airflow rotation of the filter achieves vortex separation, accurately separating dust and other impurities from the gas mass. The separated clean gas is then directly delivered to the gas detection mechanism through the first channel by the suction device, preventing impurities from entering the sampling tube and thus contaminating the detection element or interfering with the signal. This allows the gas detection mechanism to perform concentration detection in an environment free from impurities, ensuring data accuracy from the source. Meanwhile, the separated impurities are discharged through the second channel by the suction device, preventing impurities from accumulating in the channel and causing blockages or secondary pollution. Simultaneously, the flow path formed by the vortex filter and the channels has no additional physical obstructions. Combined with the flow rate control provided by the power support of the suction device, the clean gas to be analyzed can quickly pass through the inlet channel, the vortex filter, and the first channel to reach the gas detection mechanism. This rapid transmission characteristic ensures that high-frequency information such as rapidly changing gas concentrations in the air is not weakened during transmission, allowing gas detection agencies to capture these instantaneous changes in a timely manner and improving the response frequency and detection accuracy of gas analysis devices to dynamic gas fluctuations. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the gas analysis device disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the gas detection mechanism disclosed in the embodiments of this application; Figure 3 This is a partial schematic diagram of the gas detection mechanism disclosed in the embodiments of this application; Figure 4 This is a cross-sectional view of the air intake mechanism disclosed in the embodiments of this application; Figure 5 This is a schematic diagram showing the connection relationship of the temperature control components disclosed in the embodiments of this application.

[0017] The above figures include the following reference numerals: 10. Housing assembly; 20. Air intake mechanism; 21. First branch channel; 211. First segment; 212. Second segment; 22. Second branch channel; 23. Vortex filter; 231. Vortex cavity; 232. First outlet; 233. Second outlet; 24. Air intake channel; 30. Gas detection mechanism; 31. Support frame; 32. First detection channel; 33. Second detection channel; 34. Light source generating assembly; 341. Light source; 3411. First optical path; 3412. Second optical path; 342. Light transmission component; 3421. First light transmission component; 3422. Second light transmission component; 40. Drying component; 41. Flow channel; 50. Protective component; 51. Purge channel; 60. Purge component; 70. Temperature control component; 71. Thermoelectric cooler; 72. Temperature sensor; 73. Control module. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0021] As mentioned in the background section, existing gas analysis devices typically extract the gas to be analyzed from the environment directly into the sampling tube during the sampling process. However, the composition of gases in the environment is complex. When directly extracted, in addition to the target analyte, impurities such as dust and water vapor in the air will enter the sampling tube along with the gas to be analyzed, thus affecting the detection accuracy of the gas analysis device. To address this, the inventors of this application have designed a new gas analysis device that can at least solve the problem in the prior art where impurities in the air enter the sampling tube along with the gas to be analyzed, affecting the detection accuracy of the gas analysis device. The gas analysis device of this application will be described in detail below with reference to the accompanying drawings.

[0022] See Figures 1 to 4 As shown, according to an embodiment of this application, a gas analysis device is provided, which includes a housing assembly 10, an air inlet mechanism 20, a gas detection mechanism 30, and an air extraction component (not shown in the figure).

[0023] The housing assembly 10 has an accommodating space (not shown in the figure); an air intake mechanism 20 is disposed in the housing assembly 10, and the air intake mechanism 20 includes a first branch channel 21, a second branch channel 22, and a vortex filter element 23. The vortex filter element 23 is provided with an air intake channel 24 for communicating with the outside. The vortex filter element 23 is connected to the first branch channel 21 and the second branch channel 22 respectively. The vortex filter element 23 is configured to perform vortex separation on the gas to be analyzed conveyed by the air intake channel 24; a gas detection mechanism 30 is disposed in the accommodating space and is connected to the first branch channel 21. The gas detection mechanism 30 is at least used to detect the concentration of the gas to be analyzed conveyed by the first branch channel 21; and an air extraction component is disposed in the accommodating space and is connected to the gas detection mechanism 30 and the second branch channel 22 respectively.

[0024] In this embodiment, the housing assembly 10 isolates the gas detection mechanism 30 and the extraction component from the external environment, reducing the possibility of external impurities directly intruding into the internal critical components and laying the foundation for subsequent accurate detection. Due to this reliable protective capability, the gas analyzer can be used in various harsh environmental conditions, such as high-latitude northern forests, permafrost, tundra, mid-latitude regions, and equatorial rainforests. The extraction component allows control over the speed at which the gas analyzer extracts external gas. Since the extraction component in this embodiment is connected to the gas detection mechanism 30 and the second branch channel 22, and the vortex filter 23 is connected to the first branch channel 21 and the second branch channel 22, when the extraction component is working, the external gas to be analyzed enters the vortex filter 23 through the inlet channel 24. At this time, the vortex filter 23 uses the centrifugal force generated by the airflow rotation to perform vortex separation of the gas, separating impurities such as dust mixed in the gas from the main gas mass, effectively preventing impurities from entering the first branch channel 21 (i.e., the sampling tube) along with the gas to be analyzed, thereby improving the detection accuracy of the gas analyzer. After the gas containing impurities is separated by vortex separation, the clean gas is quickly transported to the gas detection mechanism 30 through the first channel 21 under the action of the suction device. The gas detection mechanism 30 then performs concentration detection on the gas to accurately obtain the concentration data of the gas to be analyzed, effectively improving the response frequency of the gas analysis device. At the same time, the separated impurities are discharged through the second channel 22 under the action of the suction device, effectively avoiding the accumulation of impurities in the second channel 22 and causing blockage or pollution.

[0025] In other words, this application connects the vortex filter element 23 to the first channel 21 and the second channel 22, and connects the first channel 21 to the gas detection mechanism 30. Thus, when the gas to be analyzed containing impurities enters the vortex filter element 23 through the inlet channel 24, vortex separation is achieved by utilizing the centrifugal force generated by the airflow rotation of the vortex filter element 23, accurately separating dust and other impurities from the gas mass. The separated clean gas is directly transported to the gas detection mechanism 30 through the first channel 21 under the action of the extraction device, preventing impurities from entering the sampling tube and thus avoiding contamination or signal interference to the detection element. This allows the gas detection mechanism 30 to complete concentration detection in an environment free from impurity interference, ensuring data accuracy from the source. Meanwhile, the separated impurities are discharged through the second channel 22 under the action of the extraction device, preventing impurities from accumulating in the channel and causing blockage or secondary pollution. Meanwhile, the flow path formed by the vortex filter 23 and each channel in this application has no additional physical obstruction. Combined with the flow rate control provided by the power support of the extraction device, clean gas to be analyzed can quickly pass through the inlet channel 24, the vortex filter 23, and the first branch channel 21 to reach the gas detection mechanism 30. This rapid transmission characteristic ensures that high-frequency information such as rapidly changing gas concentrations in the air is not weakened during transmission, allowing the gas detection mechanism 30 to promptly capture these instantaneous changes, thus improving the response frequency and detection accuracy of the gas analysis device to dynamic gas fluctuations.

[0026] Furthermore, the housing assembly 10 of this application isolates the gas detection mechanism 30 and the extraction component from the external environment, reducing the possibility of external impurities directly intruding into the internal critical components. Combined with the connection design of the aforementioned channels and components, the entire device can function stably even in harsh environments, effectively preventing impurities from affecting the detection accuracy and ensuring the accuracy and reliability of gas analysis work.

[0027] For example, the gas analysis apparatus in this application uses eddy covariance to measure the CH4 or N2O flux, thereby obtaining the net exchange flux of methane or nitrous oxide between the Earth and the atmosphere.

[0028] Further, see Figure 4 As shown, the vortex filter element 23 in this embodiment has a vortex cavity 231, a first branch port 232 and a second branch port 233. The first branch port 232 and the second branch port 233 are both connected to the vortex cavity 231. The air intake channel 24 is tangent to the peripheral sidewall of the vortex cavity 231 and is connected to the vortex cavity 231. The first branch port 232 is connected to the first branch channel 21, and the second branch port 233 is connected to the second branch channel 22.

[0029] Specifically, in this embodiment, the vortex filter 23 has a vortex cavity 231 that provides a dedicated space for the vortex separation of the gas to be analyzed, forming a stable rotating airflow after the gas enters. Simultaneously, since the air inlet channel 24 in this embodiment is tangential to and connected to the peripheral wall of the vortex cavity 231, when the gas to be analyzed enters the vortex cavity 231 from the air inlet channel 24, the gas flows in along the circumferential tangential direction of the vortex cavity 231, thereby inducing a strong rotational motion within the vortex cavity 231. Utilizing the centrifugal force generated by the rotation, impurities such as dust mixed in the gas are thrown towards the inner wall surface of the vortex cavity 231, thus achieving efficient separation of impurities from the main gas mass. Furthermore, since the first outlet 232 in this embodiment is connected to the first branch channel 21, the clean gas located in the central region of the vortex cavity 231 after vortex separation is exported from the first outlet 232 and transported to the gas detection mechanism 30 through the first branch channel 21, ensuring the purity of the gas entering the detection stage. Furthermore, since the second outlet 233 in this embodiment is connected to the second channel 22, impurities that are thrown towards the inner wall of the vortex cavity 231 by centrifugal force after vortex separation are collected in the second outlet 233 and then discharged through the second channel 22, preventing impurities from remaining in the vortex cavity 231 or entering subsequent channels with clean gas. The entire structural design makes the gas separation process smoother and the separation effect more thorough, providing a reliable guarantee for improving the detection accuracy of the gas analysis device.

[0030] Further, see Figure 4 As shown, along the direction from the connection point between the first branch channel 21 and the first branch outlet 232 to the connection point between the second branch channel 22 and the second branch outlet 233, the cross-sectional area of ​​the vortex cavity 231 in this embodiment gradually decreases. It should be noted that the "cross-sectional area of ​​the vortex cavity 231" in this application refers to the cross-sectional area taken along the direction perpendicular to the rotation axis of the airflow inside the vortex cavity 231.

[0031] Specifically, this embodiment gradually reduces the cross-sectional area of ​​the vortex cavity 231. This allows the gas to be analyzed entering the vortex cavity 231 to rotate and flow. As the space of the vortex cavity 231 gradually narrows, the rotational speed of the airflow continuously increases, and the centrifugal force increases accordingly. This more efficiently throws dust and other impurities towards the inner wall of the vortex cavity 231, enhancing the separation effect between impurities and the main gas mass. Simultaneously, the gradually decreasing cross-sectional area of ​​the vortex cavity 231 further increases the airflow velocity near the second branch 233, thus more forcefully propelling the impurities thrown towards the inner wall towards the second branch 233, reducing impurity retention within the vortex cavity 231, and ensuring that impurities can smoothly pass through the second branch 233 and be discharged into the second branch channel 22. Meanwhile, the first branch 232, located at the end with the larger cross-sectional area, can more accurately collect clean gas in the central region of the vortex cavity 231 in a relatively stable airflow environment, and then deliver it to the gas detection mechanism 30 through the first branch channel 21, ensuring that the purity of the gas entering the detection stage is not affected.

[0032] Further, see Figure 4 As shown, the first channel 21 in this embodiment includes a first segment 211 and a second segment 212. The first segment 211 is connected between the vortex filter element 23 and the second segment 212. A drying element 40 is provided in the second segment 212. The drying element 40 has a flow channel 41, which is connected between the first segment 211 and the gas detection mechanism 30. The drying element 40 is configured to adsorb water vapor molecules in the gas to be analyzed and migrate them into the second segment 212 through diffusion. The pressure in the flow channel 41 is lower than the pressure in the second segment 212.

[0033] Specifically, in this embodiment, the first channel 21 is divided into a first segment 211 and a second segment 212. This allows the clean gas to be analyzed, separated by the vortex filter 23, to smoothly transition from the first segment 211 to the second segment 212, providing a smooth airflow path for further processing. Simultaneously, since a dryer 40 is installed in the second segment 212, and the flow channel 41 of the dryer 40 connects the first segment 211 and the gas detection mechanism 30, residual water vapor molecules in the clean gas are adsorbed by the dryer 40 after entering the flow channel 41, further improving the dryness of the gas and preventing water vapor molecules from entering the gas detection mechanism 30 and affecting detection accuracy. Furthermore, the water vapor molecules adsorbed by the dryer 40 can migrate to the second segment 212 through diffusion, preventing water vapor molecules from accumulating in the flow channel 41 and obstructing gas flow. Furthermore, since the pressure in the flow channel 41 is lower than the pressure in the second segment 212, this pressure difference can drive the water vapor molecules adsorbed by the drying element 40 to diffuse and migrate more smoothly from the flow channel 41 to the second segment 212, reducing the retention of water vapor molecules on the drying element 40, thereby ensuring the continuous and stable adsorption capacity of the drying element 40, and keeping the gas to be analyzed entering the gas detection mechanism 30 in a good dry state, ensuring the accuracy of the detection work.

[0034] Furthermore, the drying element 40 in this embodiment includes a perfluorosulfonic acid tube (Nafion). Specifically, due to the hydrophilicity and selective permeability of the perfluorosulfonic acid tube, when the gas to be analyzed enters the flow channel 41, the perfluorosulfonic acid tube can adsorb water vapor molecules in the gas to be analyzed, further improving the dryness of the gas and preventing water vapor molecules from entering the gas detection mechanism 30 and affecting the detection accuracy. At the same time, the water vapor molecules adsorbed by the perfluorosulfonic acid tube can migrate smoothly to the second segment 212 through diffusion by utilizing its own ion conduction characteristics, preventing water vapor molecules from accumulating in the flow channel 41 and hindering gas flow. In addition, since the pressure in the flow channel 41 is lower than the pressure in the second segment 212, this pressure difference, combined with the material characteristics of the perfluorosulfonic acid tube, can drive the adsorbed water vapor molecules to diffuse and migrate more smoothly from the flow channel 41 to the second segment 212, reducing the retention of water vapor molecules on the tube body and ensuring the continuous and stable adsorption capacity of the perfluorosulfonic acid tube.

[0035] Further, see Figure 4 As shown, in this embodiment, a protective member 50 is also provided in the second segment 212. There is a gap between the protective member 50 and the inner wall surface of the second segment 212. The protective member 50 has a purge channel 51. The drying member 40 passes through the purge channel 51 and is spaced apart from the inner wall surface of the purge channel 51. A purge member 60 is provided in the accommodating space. The purge member 60 is connected to the protective member 50 to at least blow air into the purge channel 51.

[0036] Specifically, in this embodiment, a protective element 50 is installed within the second segment 212, and a gap is left between the protective element 50 and the inner wall surface of the second segment 212. This prevents impurities or condensed water vapor on the inner wall surface of the second segment 212 from directly contacting the drying element 40, forming a physical barrier for the drying element 40 and reducing direct erosion of the drying element 40 by external factors. At the same time, since the drying element 40 passes through the purging channel 51, and the drying element 40 and the inner wall surface of the purging channel 51 are spaced apart, this gap creates space for airflow. Furthermore, since the purging element 60 within the accommodating space is connected to the protective element 50, the purging element 60 can blow air into the purging channel 51. As the airflow flows along the gap between the drying element 40 and the inner wall of the purging channel 51 (this gap is formed by the spaced intervals between the drying element 40 and the inner wall of the purging channel 51), it promptly carries away water vapor molecules that have migrated from the drying element 40 through diffusion. Simultaneously, it removes any tiny impurities that may adhere to the surface of the drying element 40, preventing water vapor molecules from accumulating around the drying element 40 and reducing its adsorption capacity. It also avoids impurities clogging the flow channel 41 of the drying element 40. This design ensures that the drying element 40 is always in a clean and dry working environment, guaranteeing its continuous and stable adsorption of water vapor molecules from the gas to be analyzed, indirectly improving the detection accuracy of the gas detection mechanism 30.

[0037] Further, see Figures 2 to 3 As shown, the gas detection mechanism 30 in this embodiment includes a support frame 31, a first detection channel 32, a second detection channel 33, and a light source generating assembly 34. The first detection channel 32 is disposed on the support frame 31 and is connected to the first branch channel 21 through an air inlet; the second detection channel 33 is disposed on the support frame 31 and is used at least to deliver reference gas; the light source generating assembly 34 is disposed on the support frame 31 and is connected to the first detection channel 32 and the second detection channel 33 respectively, and the light source generating assembly 34 is configured to provide a light beam of a preset wavelength to the first detection channel 32 and the second detection channel 33; wherein, the length of the first detection channel 32 is equal to the length of the second detection channel 33, and the light intensity in the first detection channel 32 is greater than the light intensity in the second detection channel 33.

[0038] It should be noted that, in this embodiment, "reference gas" refers to a gas whose composition and concentration are known, which can be used to compare with the detection results of the gas to be analyzed to help determine the properties or concentration of the gas to be analyzed; "preset wavelength" refers to a beam of light of a specific wavelength that is preset according to the optical characteristics of the gas to be analyzed and the reference gas.

[0039] Specifically, the support frame 31 provides a stable mounting platform for the first detection channel 32, the second detection channel 33, and the light source generating assembly 34, ensuring that the positions of each component are fixed during the detection process and reducing interference caused by factors such as shaking. After the gas to be analyzed is processed by the vortex filter 23 and the dryer 40, the first detection channel 32 can receive the clean gas to be analyzed delivered through the first branch channel 21, providing a dedicated detection space for gas detection. At this time, the second detection channel 33 simultaneously delivers the reference gas. The two gases remain stable in their respective channels, awaiting optical detection. Simultaneously, the light source generating assembly 34 mounted on the support frame 31 is activated, emitting a beam of light of a preset wavelength to both the first detection channel 32 and the second detection channel 33. The beam interacts fully with the gas to be analyzed and the reference gas in the two channels of equal length. Since the light intensity in the first detection channel 32 is greater than that in the second detection channel 33, the optical signal generated by the interaction of the gas to be analyzed with the beam is more significant, forming a clear contrast with the signal generated by the interaction of the reference gas. This difference can be accurately captured, and combined with the difference in the optical characteristics of the two gases, the concentration of the gas to be analyzed can be accurately calculated. Throughout the process, the components maintain a relatively stable position due to the fixation of the support frame 31, avoiding optical path deviation caused by displacement and further ensuring the reliability of the test results.

[0040] In other words, the gas analysis device in this embodiment employs Tunable Diode Laser Absorption Spectroscopy (TDLAS), which features high sensitivity and response frequency. The preset wavelength beam emitted by the light source generator 34 can precisely match the characteristic absorption wavelengths of the gas to be analyzed and the reference gas, allowing the beam to undergo specific absorption with the gas to be analyzed and the reference gas respectively in the first detection channel 32 and the second detection channel 33. Due to the high resolution and high sensitivity of this technology, even if the concentration of the target component in the gas to be analyzed is low, the stronger light intensity in the first detection channel 32 can make the absorption signal of the gas to be analyzed more prominent, forming a clear difference from the absorption signal of the reference gas. After this difference is accurately captured, combined with the path interference eliminated by the equal length of the two detection channels and the optical path deviation avoided by the fixing effect of the support frame 31 on each component, the concentration of the gas to be analyzed can be accurately calculated through spectral analysis. This further improves the accuracy and stability of the detection process based on the gas pretreatment by components such as the vortex filter 23 and the drying component 40, meeting the high-precision requirements for gas component analysis in various harsh environments.

[0041] It is understood that in this application, gas may be introduced into the first detection channel 32 and the second detection channel 33 first, and then the light source generating component 34 may be turned on, or the light source generating component 34 may be turned on first, and then gas may be introduced into the first detection channel 32 and the second detection channel 33. This application does not make any specific limitation.

[0042] It is worth mentioning that the gas analysis device of this application adopts an air inlet channel 24 with a vortex filter 23 and an integrated Nafion drying device to ensure that the gas entering the first detection channel 32 is clean dry air, without the need for additional measurement of water vapor molecules to correct the influence of water vapor molecules on the absorption spectrum.

[0043] Further, see Figure 3 As shown, the light source generating assembly 34 in this embodiment includes a light source 341 and a light transmission component 342. The light source 341 is disposed on the support frame 31 to generate light signals; the light transmission component 342 is disposed on the support frame 31 and includes a first light transmission element 3421 and a second light transmission element 3422. The first light transmission element 3421 is located between the light source 341 and the first detection channel 32, and the second light transmission element 3422 is disposed opposite to the first light transmission element 3421 and the second detection channel 33, respectively. The first light transmission element 3421 is configured to receive the light signal generated by the light source 341 and divide the light signal into a first light path 3411 and a second light path 3412. The first light path 3411 is conducted into the first detection channel 32, and the second light path 3412 is conducted into the second light transmission element 3422. The second light transmission element 3422 is configured to receive the second light path 3412 conducted by the first light transmission element 3421 and reflect the second light path 3412 into the second detection channel 33.

[0044] Specifically, the light source 341 generates a light signal, providing the necessary optical conditions for gas detection and ensuring the stable interaction between light and gas. Since the first light conductor 3421 in this embodiment is located between the light source 341 and the first detection channel 32, after the light source 341 generates a light signal, the first light conductor 3421 can receive the light signal and divide it into a first light path 3411 and a second light path 3412. The first light path 3411 is directly conducted into the first detection channel 32, allowing the gas to be analyzed in the first detection channel 32 to fully interact with the light signal. The second light path 3412 is conducted to the second light conductor 3422. Because the second light conductor 3422 is positioned opposite to the first light conductor 3421 and the second detection channel 33, the second light conductor 3422 can reflect the second light path 3412 into the second detection channel 33, allowing the reference gas in the second detection channel 33 to also interact with the light signal. The light signal generated by the same light source 341 can be distributed and transmitted in this way, so as to act on two detection channels at the same time, ensuring the consistency of the light signal in the two channels and avoiding the difference caused by different light signal sources. This makes the optical characteristics of the gas to be analyzed after interacting with the light signal and the optical characteristics of the reference gas after interacting with the light signal more comparable, providing a stable and reliable basis for subsequent comparative analysis and helping to improve the accuracy of the detection results.

[0045] Specifically, the first optical transmission element 3421 in this embodiment includes a beam splitter, an optical fiber coupler, etc. The beam splitter can receive the optical signal generated by the light source 341 and divide it into a first optical path 3411 and a second optical path 3412 according to a certain ratio, ensuring the stability and homogeneity of the two optical signals; after receiving the optical signal generated by the light source 341, the optical fiber coupler distributes the optical signal into the first optical path 3411 and the second optical path 3412 through its internal optical power distribution structure, and the optical signals of the two optical paths are consistent in terms of wavelength, stability, etc.

[0046] Specifically, in this embodiment, the second light transmission element 3422 includes a reflector. The reflector, by virtue of the reflective properties of the mirror, accurately reflects the second light path 3412 transmitted from the first light transmission element 3421 into the second detection channel 33, ensuring the accurate guidance of the light path.

[0047] Further, see Figure 2 and Figure 5 As shown, the light source generating component 34 in this embodiment also includes a temperature control component 70. The temperature control component 70 is disposed on the support frame 31 and electrically connected to the light source 341. The temperature control component 70 includes a thermoelectric cooler 71, a temperature sensor 72, and a control module 73. Both the thermoelectric cooler 71 and the temperature sensor 72 are electrically connected to the control module 73. The thermoelectric cooler 71 has a cooling mode and a heating mode. The temperature sensor 72 is used at least to collect the temperature of the light source 341 and transmit it to the control module 73. The control module 73 controls the thermoelectric cooler 71 to switch between the cooling mode and the heating mode according to the electrical signal transmitted by the temperature sensor 72.

[0048] Specifically, this embodiment utilizes a thermoelectric cooler 71, a temperature sensor 72, and a control module 73 to form a closed-loop temperature regulation system. The temperature sensor 72 collects real-time temperature information from the light source 341 and converts it into an electrical signal, which is then transmitted to the control module 73, providing a precise basis for temperature regulation. Upon receiving the electrical signal, the control module 73 determines the current temperature state of the light source 341 based on a preset temperature range, and then controls the thermoelectric cooler 71 to switch between cooling and heating modes. When the temperature of the light source 341 is too high, the thermoelectric cooler 71 switches to cooling mode to quickly reduce the temperature of the light source 341; when the temperature of the light source 341 is too low, it switches to heating mode to promptly increase the temperature of the light source 341, ensuring that the light source 341 always operates in a suitable temperature environment. This dynamic temperature regulation keeps the wavelength and intensity of the light signal generated by the light source 341 stable, avoiding changes in the characteristics of the light signal due to temperature fluctuations. This makes the first optical path 3411 and the second optical path 3412 allocated by the first optical transmission element 3421 more stable, and the optical signal after interaction with the gas in the first detection channel 32 and the second detection channel 33 more reliable. This further enhances the accuracy of the comparison of the optical characteristics of the gas to be analyzed and the reference gas, and provides a strong guarantee for the accuracy of the entire gas detection process.

[0049] On the other hand, embodiments of this application also provide a gas analysis system, which includes the aforementioned gas analysis device. Therefore, this gas analysis system encompasses all the technical effects of the aforementioned gas analysis device. Since the technical effects of the gas analysis device have already been described in detail above, they will not be repeated here.

[0050] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0051] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0052] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gas analysis device, characterized in that, include: The housing assembly (10) has an accommodating space; An air intake mechanism (20) is disposed on the housing assembly (10). The air intake mechanism (20) includes a first branch channel (21), a second branch channel (22), and a vortex filter (23). The vortex filter (23) is provided with an air intake channel (24) for communicating with the outside. The vortex filter (23) is connected to the first branch channel (21) and the second branch channel (22) respectively. The vortex filter (23) is configured to perform vortex separation on the gas to be analyzed delivered by the air intake channel (24). A gas detection mechanism (30) is disposed in the accommodating space and communicates with the first branch channel (21). The gas detection mechanism (30) is at least used to detect the concentration of the gas to be analyzed conveyed through the first branch channel (21). An air extraction device is disposed in the accommodating space and connected to the gas detection mechanism (30) and the second branch channel (22) respectively.

2. The gas analysis apparatus according to claim 1, characterized in that, The vortex filter element (23) has a vortex cavity (231), a first branch port (232) and a second branch port (233). The first branch port (232) and the second branch port (233) are both connected to the vortex cavity (231). The air intake channel (24) is tangent to the peripheral sidewall of the vortex cavity (231) and is connected to the vortex cavity (231). The first branch port (232) is connected to the first branch channel (21), and the second branch port (233) is connected to the second branch channel (22).

3. The gas analysis apparatus according to claim 2, characterized in that, Along the direction from the connection point between the first branch channel (21) and the first branch port (232) to the connection point between the second branch channel (22) and the second branch port (233), the cross-sectional area of ​​the vortex cavity (231) gradually decreases.

4. The gas analysis apparatus according to claim 1, characterized in that, The first branch channel (21) includes a first segment (211) and a second segment (212), wherein the first segment (211) is connected between the vortex filter element (23) and the second segment (212); A drying element (40) is provided in the second segment (212). The drying element (40) has a flow channel (41) which is connected between the first segment (211) and the gas detection mechanism (30). The drying element (40) is configured to adsorb water vapor molecules in the gas to be analyzed and migrate them into the second segment (212) through diffusion. The pressure in the flow channel (41) is less than the pressure in the second segment (212).

5. The gas analysis apparatus according to claim 4, characterized in that, The drying element (40) includes a perfluorosulfonic acid tube.

6. The gas analysis apparatus according to claim 4, characterized in that, The second segment (212) is also provided with a protective component (50), the protective component (50) and the inner wall surface of the second segment (212) are spaced apart, the protective component (50) has a purge channel (51), the drying component (40) passes through the purge channel (51) and is spaced apart from the inner wall surface of the purge channel (51); A purge element (60) is provided in the accommodating space, and the purge element (60) is connected to the protective element (50) for at least blowing air into the purge channel (51).

7. The gas analysis apparatus according to any one of claims 1 to 6, characterized in that, The gas detection mechanism (30) includes: Support frame (31); The first detection channel (32) is disposed on the support frame (31) and the first detection channel (32) is connected to the first branch channel (21) through the air inlet; The second detection channel (33) is disposed on the support frame (31) and is used at least for conveying reference gas; A light source generating component (34) is disposed on the support frame (31). The light source generating component (34) is connected to the first detection channel (32) and the second detection channel (33) respectively, and the light source generating component (34) is configured to provide a light beam of a preset wavelength to the first detection channel (32) and the second detection channel (33). The length of the first detection channel (32) is equal to the length of the second detection channel (33), and the light intensity in the first detection channel (32) is greater than the light intensity in the second detection channel (33).

8. The gas analysis apparatus according to claim 7, characterized in that, The light source generating component (34) includes: A light source (341) is disposed on the support frame (31) for generating light signals; A light-conducting component (342) is disposed on the support frame (31). The light-conducting component (342) includes a first light-conducting element (3421) and a second light-conducting element (3422). The first light-conducting element (3421) is located between the light source (341) and the first detection channel (32). The second light-conducting element (3422) is disposed opposite to the first light-conducting element (3421) and the second detection channel (33) respectively. The first light conductor (3421) is configured to receive the light signal generated by the light source (341) and divide the light signal into a first light path (3411) and a second light path (3412). The first light path (3411) is conducted to the first detection channel (32), and the second light path (3412) is conducted to the second light conductor (3422). The second light conductor (3422) is configured to receive the second light path (3412) conducted by the first light conductor (3421) and reflect the second light path (3412) into the second detection channel (33).

9. The gas analysis apparatus according to claim 8, characterized in that, The light source generating assembly (34) also includes a temperature control component (70), which is disposed on the support frame (31) and electrically connected to the light source (341). The temperature control component (70) includes a thermoelectric cooler (71), a temperature sensor (72), and a control module (73). The thermoelectric cooler (71) and the temperature sensor (72) are both electrically connected to the control module (73). The thermoelectric cooler (71) has a cooling mode and a heating mode. The temperature sensor (72) is used at least to collect the temperature of the light source (341) and transmit it to the control module (73). The control module (73) controls the thermoelectric cooler (71) to switch between the cooling mode and the heating mode according to the electrical signal transmitted by the temperature sensor (72).

10. A gas analysis system, characterized in that, The gas analysis system includes the gas analysis device according to any one of claims 1 to 9.

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