Closed-loop CO2 and H2O analyzer for severe weather

Abstract

The invention relates to a severe weather closed-loop type CO2 and H2O analyzer, which relates to the technical field of atmospheric analysis, and comprises an analysis body and an air suction assembly for sucking air into the analysis body, the analysis body comprises a shell, an inflation illumination channel arranged in the shell, optical filters arranged at the two ends of the inflation illumination channel, light sources arranged at the ends, away from the inflation illumination channel, of the two optical filters correspondingly, and a detector. The heat preservation air inlet pipe is horizontally arranged at the side end of the shell and communicates with the inflation illumination channel, the air inlet cap is arranged at the end, away from the shell, of the heat preservation air inlet pipe, the air inlet end of the air inlet cap is vertically downward, and the outer wall of the heat preservation air inlet pipe is a heat insulation layer; the inner wall of the heat preservation air inlet pipe is an electric heating layer. The method has the beneficial effects that the attenuation of CO2 and H2O can be effectively reduced, so that the scheme can be used for accurately analyzing the concentration of CO2 and H2O in severe weather.

Description

Technical Field

[0001] The present invention relates to the technical field of atmospheric analysis, and particularly relates to a closed-circuit CO2 and H2O analyzer for bad weather. Background Art

[0002] The carbon and water exchange between forests and the atmosphere is a hot issue in current fields such as earth science, ecology, and forestry. Among them, the eddy covariance technology (EC) is a representative of the micrometeorological method for studying the carbon and water fluxes of terrestrial ecosystems.

[0003] In practical applications, four common analyzers are usually used, namely infrared gas analyzers, open-circuit CO2 / H2O gas analyzers, closed-circuit CO2 / H2O gas analyzers, and CH4 laser analyzers. When applied to bad weather, a closed-circuit CO2 / H2O gas analyzer is usually used to ensure the validity of measurement data. The closed-circuit CO2 / H2O gas analyzer uses non-dispersive infrared spectroscopy to measure the density of CO2 and water vapor in the air.

[0004] In a bad weather environment, the temperature changes greatly. During the process of sucking air into the analyzer, CO2 and H2O will be attenuated to varying degrees due to the environmental temperature difference, thereby affecting the final analysis result. Summary of the Invention

[0005] (1) Technical Problems to be Solved

[0006] In view of the above-mentioned disadvantages and deficiencies of the prior art, the present invention provides a closed-circuit CO2 and H2O analyzer for bad weather, which solves the technical problem that in a bad weather environment with large temperature changes, CO2 and H2O will be attenuated to varying degrees due to the environmental temperature difference, thereby affecting the final analysis result.

[0007] (2) Technical Solutions

[0008] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0009] An embodiment of the present invention provides a closed-circuit CO2 and H2O analyzer for bad weather, including an analysis body and an air extraction component for pumping air into the analysis body. The analysis body includes a housing, an inflated light channel disposed inside the housing, optical filter films disposed at both ends of the inflated light channel, a light source and a detector respectively disposed at one end of the two optical filter films away from the inflated light channel. The air extraction component includes a heat-insulating intake pipe horizontally disposed at the side end of the housing and communicating with the inflated light channel, and an intake cap disposed at one end of the heat-insulating intake pipe away from the housing. The intake end of the intake cap faces vertically downward. The outer wall of the heat-insulating intake pipe is a heat-insulating layer, and the inner wall of the heat-insulating intake pipe is an electric heating layer.

[0010] An enclosed CO2 and H2O analyzer for adverse weather proposed by an embodiment of the present invention. When analyzing the concentrations of CO2 and H2O in the atmosphere through this analyzer, air is inhaled along the intake cap, so that the air is directly transported into the inflatable light channel along the heat-insulating intake pipe. Subsequently, a light source irradiates the inflatable light channel, and the light passes through an optical filter, so that infrared radiation penetrates into the inflatable light channel. When the infrared radiation passes through the inflatable light channel, it will be absorbed by CO2 and H2O. Subsequently, the detector detects the infrared radiation. At this time, the densities of CO2 and H2O can be calculated by the ratio of the absorbed radiation to the reference radiation. In adverse weather, the environmental temperature changes greatly. When air enters the heat-insulating intake pipe from the outside, the external temperature can be isolated through the heat-insulating intake pipe, which can effectively reduce the attenuation of CO2 and H2O. At the same time, by heating the inner wall of the heat-insulating intake pipe, the probability of water vapor adsorbing on the inner wall can be reduced, and the attenuation of H2O can be further reduced, so that this solution can accurately analyze the concentrations of CO2 and H2O in adverse weather.

[0011] Optionally, a brushless chopper wheel is rotatably arranged between the light source and the optical filter, and the brushless chopper wheel intermittently blocks the light from the light source irradiating the optical filter as it rotates.

[0012] By rotatably arranging a brushless chopper wheel between the light source and the optical filter, the light emitted by the light source can be intermittently blocked as the brushless chopper wheel rotates, so that the infrared radiation passing through the optical filter and irradiating into the inflatable light channel is in the form of beams, thereby obtaining more frequent detections and making the analysis of the concentrations of CO2 and H2O more accurate.

[0013] Optionally, a relay cavity for the rotation of the brushless chopper wheel is provided on one side of the housing in the inflatable light channel. The housing is provided with a first storage cavity and a second storage cavity on the side of the relay cavity away from the inflatable light channel. The light source is placed in the first storage cavity. The first storage cavity and the relay cavity are connected through a refraction channel. The refraction channel is composed of sequentially connected and bent holes. A reflecting mirror is arranged at the bending part of the refraction channel, and multiple reflecting mirrors reflect the light emitted by the light source to the optical filter.

[0014] By providing a relay cavity and a first storage cavity on one side of the inflatable light channel, the brushless chopper wheel rotates independently in the relay cavity, and at the same time, the light source is placed in the first storage cavity, so that the light source does not directly irradiate into the inflatable light channel, but is reflected by multiple reflecting mirrors in the refraction channel and finally irradiates onto the optical filter, thereby minimizing the influence of the temperature generated by the continuous irradiation of the light source on the analysis process and realizing more accurate analysis of the concentrations of CO2 and H2O.

[0015] Optionally, a brushless motor is disposed in the second receiving cavity. The brushless chopping wheel is coaxially fixed to the output shaft of the brushless motor. The brushless chopping wheel is circumferentially and evenly spaced with light-transmitting holes, and the light-transmitting holes are sequentially aligned with the optical filter as the brushless chopping wheel rotates.

[0016] By fixing the brushless motor in the second receiving cavity, the influence of the heat generated during the operation of the brushless motor on the analysis process is reduced. At the same time, the light-transmitting holes are circumferentially and evenly spaced on the brushless chopping wheel, so that as the brushless chopping wheel rotates at a constant speed, the light irradiating the optical filter can be more evenly blocked, making the analysis process more linear and accurate.

[0017] Optionally, a ring-shaped ventilation ring cavity is coaxially provided on the outer peripheral side of the inflatable light channel of the housing. The ventilation ring cavity sucks the air in the inflatable light channel and pumps it into the relay cavity. Heat dissipation holes communicating with the first receiving cavity and the second receiving cavity are provided at the side end of the housing, and the air in the relay cavity is discharged along the heat dissipation holes through the first receiving cavity and the second receiving cavity.

[0018] By providing a ventilation ring cavity on the outer peripheral side of the inflatable light channel, the air filled in the inflatable light channel will be pumped out and new air will be pumped in within a certain period of time. The pumped-out air will enter the ventilation ring cavity and then be pumped into the relay cavity. The air will enter the first receiving cavity and the second receiving cavity through the relay cavity and be discharged along the heat dissipation holes, thereby carrying away the heat generated during the operation of the light source and the brushless motor, ensuring that the temperature change inside the housing is smaller, reducing the influence of temperature on the analysis process, and improving the accuracy of CO2 and H2O concentration analysis.

[0019] Optionally, the axis of the light-transmitting hole is inclined to the rotation axis of the brushless chopping wheel, and the brushless chopping wheel disturbs the air away from the inflatable light channel as it rotates.

[0020] By setting the light-transmitting hole in an inclined state, the brushless chopping wheel has the effect of a fan when rotating, that is, disturbing the air away from the inflatable light channel, thereby reducing the influence of the heat overflowing from the first receiving cavity and the second receiving cavity on the analysis process. At the same time, when the brushless motor cannot work, as the air filled in the ventilation ring cavity is pumped into the relay cavity, the flowing air will also blow the brushless chopping wheel to rotate. By controlling the flow rate of the pumped-in air, the normal operation of the brushless chopping wheel can be realized, which is more convenient.

[0021] Optionally, multiple circles of air inlet holes are evenly spaced on the inner wall of the inflatable light channel of the housing. The air inlet holes communicate with the heat preservation inlet pipe, and a circle of air outlet holes is provided between adjacent two circles of air inlet holes. The air outlet holes communicate with the ventilation ring cavity.

[0022] By providing multiple circles of air inlet holes on the inner wall of the inflatable light channel, the air in the heat-insulating air inlet pipe can enter and fill the inflatable light channel more quickly and evenly. At the same time, in cooperation with the air outlet holes, the air can be discharged more quickly, so that the gas replacement efficiency in the inflatable light channel is higher, thereby increasing the update frequency of the analysis sample and improving the accuracy of CO2 and H2O concentration analysis.

[0023] Optionally, three metal ring sleeves are provided inside the housing. The three metal ring sleeves are three coaxially sleeved metal sleeves. The inner metal sleeve houses the inflatable light channel, and the ventilation ring cavity is formed between the outer and middle metal sleeves. An intermediate cavity is formed between the inner and middle metal sleeves. The intermediate cavity communicates with the air inlet holes and the heat-insulating air inlet pipe. The inner metal sleeve integrally extends outward from the inner wall of the air outlet hole to form a metal air duct, and the other end of the metal air duct is integrally connected to the ventilation ring cavity.

[0024] By providing three metal ring sleeves inside the housing, namely the inner metal sleeve, the middle metal sleeve and the outer metal sleeve, and integrally providing a metal air duct between the inner metal sleeve and the middle metal sleeve, one end of the metal air duct is connected to the inflatable light channel and the other end is connected to the ventilation ring cavity. An intermediate cavity is formed between the inner metal sleeve and the middle metal sleeve. That is, the air entering along the heat-insulating air inlet pipe will first enter the intermediate cavity, then enter the inflatable light channel along the air inlet holes, and then enter the ventilation ring cavity along the air outlet holes, that is, the metal air duct. The whole process is more smooth.

[0025] Optionally, the heat-insulating air inlet pipe includes two separated sections. A particulate filter is provided between the two sections of the heat-insulating air inlet pipe, and an arc-shaped bridge is connected to the upper side ends of the two sections of the heat-insulating air inlet pipe.

[0026] By setting the heat-insulating air inlet pipe into two sections and connecting them through a particulate filter, larger particles in the inhaled air can be filtered at the particulate filter, preventing large particulate matter from entering the inflatable light channel and affecting the analysis accuracy. At the same time, an arc-shaped bridge is connected to the upper ends of the two sections of the heat-insulating air inlet pipe, making it more convenient to replace the particulate filter after the analyzer has been working for a period of time.

[0027] Optionally, the air inlet cap is narrow at the top and wide at the bottom, and multiple circles of air guiding rings are coaxially arranged from bottom to top at the air inlet end of the air inlet cap.

[0028] By setting the air inlet cap to be narrow at the top and wide at the bottom and coaxially arranging multiple circles of air guiding rings, the negative pressure is smaller when the air enters along the air inlet end of the air inlet cap, reducing the probability of inhaling particulate matter on the periphery of the air inlet cap. At the same time, the air guiding rings can block the particulate matter, which is more convenient.

[0029] (III) Beneficial effects

[0030] The beneficial effects of the present invention are as follows: For the bad weather closed-circuit CO2 and H2O analyzer of the present invention, when analyzing the concentrations of CO2 and H2O in the atmosphere through this analyzer, air is inhaled along the intake cap, so that the air is directly transported into the inflatable light channel along the heat-insulating intake pipe. Subsequently, the light source irradiates into the inflatable light channel, and the light passes through the optical filter, enabling infrared radiation to penetrate into the inflatable light channel. When the infrared radiation passes through the inflatable light channel, it will be absorbed by CO2 and H2O. Subsequently, the detector detects the infrared radiation. At this time, the densities of CO2 and H2O can be calculated through the ratio of the absorbed radiation to the reference radiation. In bad weather, the environmental temperature changes greatly. When air enters the heat-insulating intake pipe from the outside, the outside temperature is isolated by the heat-insulating intake pipe, which can effectively reduce the attenuation of CO2 and H2O. At the same time, by heating the inner wall of the heat-insulating intake pipe, the probability of water vapor adsorbing on the inner wall can be reduced, further reducing the attenuation of H2O, so that this solution can accurately analyze the concentrations of CO2 and H2O in bad weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a three-dimensional schematic diagram of an embodiment of the present invention;

[0032] Figure 2 is a cross-sectional view of the analysis body in an embodiment of the present invention;

[0033] Figure 3 is a structural schematic diagram of the brushless chopping wheel in an embodiment of the present invention.

[0034]

DESCRIPTION OF THE REFERENCE NUMERALS

[0035] 1. Analysis body; 11. Outer shell; 111. Heat dissipation hole; 12. Metal ring sleeve; 121. Inflatable light channel; 122. Ventilation ring cavity; 123. Intermediate cavity; 124. Air intake hole; 125. Metal air duct; 126. Air outlet hole; 13. Optical filter; 14. Light source; 15. Detector; 16. Relay cavity; 161. Brushless chopping wheel; 1611. Light transmission hole; 17. First storage cavity; 18. Second storage cavity; 181. Brushless motor; 19. Refraction channel; 191. Reflecting mirror; 2. Air extraction component; 21. Heat-insulating intake pipe; 22. Intake cap; 221. Air guide ring; 23. Particle filter; 24. Arc-shaped bridge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] In order to better explain the present invention for easy understanding, the present invention will be described in detail below with reference to the accompanying drawings and through specific embodiments.

[0037] The closed-circuit CO2 and H2O analyzer in the embodiments of the present invention, when analyzing the concentrations of CO2 and H2O in the atmosphere through this analyzer, sucks air along the intake cap, so that the air is directly transported into the inflatable light channel along the heat-insulating intake pipe. Subsequently, the light source irradiates into the inflatable light channel, and the light passes through the optical filter, enabling infrared radiation to penetrate into the inflatable light channel. When the infrared radiation passes through the inflatable light channel, it will be absorbed by CO2 and H2O. Subsequently, the detector detects the infrared radiation. At this time, the densities of CO2 and H2O can be calculated by the ratio of the absorbed radiation to the reference radiation. In bad weather, the environmental temperature changes greatly. When the air enters the heat-insulating intake pipe from the outside, the outside temperature can be isolated by the heat-insulating intake pipe, which can effectively reduce the attenuation of CO2 and H2O. At the same time, by heating the inner wall of the heat-insulating intake pipe, the probability of water vapor adsorbing on the inner wall can be reduced, further reducing the attenuation of H2O, so that this solution can accurately analyze the concentrations of CO2 and H2O in bad weather.

[0038] To better understand the above technical solution, the exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to convey the scope of the present invention completely to those skilled in the art.

[0039] Referring to Figure 1 and Figure 2 , a closed-circuit CO2 and H2O analyzer for bad weather, comprising an analysis body 1 and an air extraction assembly 2 for pumping air into the analysis body 1.

[0040] The analysis body 1 includes a housing 11, an inflatable light channel 121 arranged inside the housing 11, optical filter plates 13 arranged at both ends of the inflatable light channel 121, a light source 14 and a detector 15 respectively arranged at one end of the two optical filter plates 13 away from the inflatable light channel 121. The air extraction assembly 2 includes a heat-insulating intake pipe 21 horizontally arranged at the side end of the housing 11 and communicating with the inflatable light channel 121, and an intake cap 22 arranged at one end of the heat-insulating intake pipe 21 away from the housing 11. The intake end of the intake cap 22 faces vertically downward. The outer wall of the heat-insulating intake pipe 21 is a heat-insulating layer, and the inner wall of the heat-insulating intake pipe 21 is an electric heating layer. Air is inhaled along the intake cap 22, so that the air is directly transported into the inflatable light channel 121 along the heat-insulating intake pipe 21. Subsequently, the light source 14 irradiates into the inflatable light channel 121, and the light passes through the optical filter plate 13, so that infrared radiation penetrates into the inflatable light channel 121. When the infrared radiation passes through the inflatable light channel 121, it will be absorbed by CO2 and H2O. Subsequently, the detector 15 detects the infrared radiation. At this time, the CO2 and H2O densities can be calculated by the ratio of the absorbed radiation to the reference radiation.

[0041] A relay cavity 16 is provided on one side of the housing 11 for the inflatable light channel 121. A first storage cavity 17 and a second storage cavity 18 are provided on the side of the housing 11 away from the inflatable light channel 121 for the relay cavity 16. The light source 14 is placed in the first storage cavity 17. The first storage cavity 17 and the relay cavity 16 are connected through a refractive light channel 19. The refractive light channel 19 is composed of sequentially connected and bent holes. A reflecting mirror 191 is provided at the bending part of the refractive light channel 19. Multiple reflecting mirrors 191 reflect the light emitted by the light source 14 to the optical filter plate 13. The light source 14 is placed in the first storage cavity 17, so that the light source 14 does not directly irradiate into the inflatable light channel 121, but is reflected by a variety of reflecting mirrors 191 in the refractive light channel 19 and finally irradiates onto the optical filter plate 13, thereby minimizing the influence of the temperature generated by the continuous irradiation of the light source 14 on the analysis process and realizing a more accurate analysis of the CO2 and H2O concentrations.

[0042] A brushless motor 181 is arranged in the second storage cavity 18. The output shaft of the brushless motor 181 penetrates into the relay cavity 16 and is coaxially fixed with a brushless chopping wheel 161. Light-transmitting holes 1611 are circumferentially and evenly spaced on the brushless chopping wheel 161. The light-transmitting holes 1611 are sequentially aligned with the optical filter plate 13 as the brushless chopping wheel 161 rotates, thereby intermittently blocking the light irradiated by the light source 14 to the optical filter plate 13. The brushless motor 181 is fixed in the second storage cavity 18 to reduce the influence of the heat generated during the operation of the brushless motor 181 on the analysis process. At the same time, the light-transmitting holes 1611 are circumferentially and evenly spaced on the brushless chopping wheel 161, so that as the brushless chopping wheel 161 rotates at a constant speed, the light irradiated to the optical filter plate 13 can be blocked more evenly, making the analysis process more linear and more accurate.

[0043] The housing 11 is internally provided with three layers of metal ring sleeves 12. The three layers of metal ring sleeves 12 are three coaxially sleeved metal sleeves. Inside the inner metal sleeve is an air-filled light channel 121. Between the outer and middle metal sleeves is a ventilation ring cavity 122. Between the inner and middle metal sleeves forms an intermediate cavity 123. On the inner wall of the inner metal sleeve, multiple circles of air inlet holes 124 are evenly spaced. The intermediate cavity 123 communicates with the air inlet holes 124 and the heat preservation air inlet pipe 21. The inner metal sleeve integrally extends outward from the inner wall of the air outlet hole 126 to form a metal air duct 125. The other end of the metal air duct 125 is integrally connected to the ventilation ring cavity 122 to form multiple circles of air outlet holes 126 located between adjacent circles of air inlet holes 124. The air outlet holes 126 communicate with the ventilation ring cavity 122. The air in the heat preservation air inlet pipe 21 can enter and fill the air-filled light channel 121 more quickly and evenly, and at the same time, cooperate with the air outlet holes 126 to discharge the air more quickly, so that the gas replacement efficiency in the air-filled light channel 121 is higher, thereby improving the update frequency of the analysis sample.

[0044] The ventilation ring cavity 122 sucks the air in the air-filled light channel 121 and pumps it into the relay cavity 16. The side end of the housing 11 is provided with a heat dissipation hole 111 communicating with the first storage cavity 17 and the second storage cavity 18. The air in the relay cavity 16 is discharged along the heat dissipation hole 111 through the first storage cavity 17 and the second storage cavity 18. The air filled in the air-filled light channel 121 will be pumped out and new air will be pumped in within a certain period of time. The pumped-out air will enter the ventilation ring cavity 122, and then be pumped into the relay cavity 16. The air will enter the first storage cavity 17 and the second storage cavity 18 through the relay cavity 16 and be discharged along the heat dissipation hole 111, thereby carrying away the heat generated when the light source 14 and the brushless motor 181 work, so as to ensure that the temperature change inside the housing 11 is smaller and reduce the influence of temperature on the analysis process.

[0045] See Figure 2 and Figure 3 The axis of the light-transmitting hole 1611 is inclined to the rotation axis of the brushless chopping wheel 161. The brushless chopping wheel 161 disturbs the air toward the side away from the air-filled light channel 121 as it rotates. The brushless chopping wheel 161 acts like a fan when rotating, that is, it disturbs the air toward the side away from the air-filled light channel 121, thereby reducing the influence of the heat overflowing from the first storage cavity 17 and the second storage cavity 18 on the analysis process. At the same time, when the brushless motor 181 cannot work, as the air filled in the ventilation ring cavity 122 is pumped into the relay cavity 16, the flowing air will also blow the brushless chopping wheel 161 to rotate. By controlling the flow rate of the pumped-in air, the normal operation of the brushless chopping wheel 161 can be achieved.

[0046] See Figure 1, the heat-insulating intake pipe 21 includes two separated sections, and a particulate filter 23 is connected and communicated between the two sections of the heat-insulating intake pipe 21 through a threaded connection. An arc-shaped bridge 24 is connected to the upper side ends of the two sections of the heat-insulating intake pipe 21 through bolts. Larger particles of the inhaled air can be filtered at the particulate filter 23, preventing large particulate matter from entering the inflation light channel 121 and affecting the analysis accuracy. At the same time, an arc-shaped bridge is connected to the upper ends of the two sections of the heat-insulating intake pipe 21, making it more convenient to replace the particulate filter 23 after the analyzer has been working for a period of time.

[0047] The air inlet cap 22 is narrower at the top and wider at the bottom, and multiple circles of wind guiding rings 221 are integrally and coaxially arranged from bottom to top at the air inlet end of the air inlet cap 22. When air enters along the air inlet end of the air inlet cap 22, the negative pressure is smaller, reducing the probability of inhaling particulate matter on the peripheral side of the air inlet cap 22. At the same time, the wind guiding rings 221 can block the particulate matter, which is more convenient.

[0048] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0049] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0051] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A closed-circuit CO2 and H2O analyzer for severe weather, characterized by: The invention comprises an analysis body (1) and an air extraction component (2) for extracting air into the analysis body (1); the analysis body (1) comprises an outer shell (11), an air-filled illumination channel (121) arranged inside the outer shell (11), optical filters (13) arranged at both ends of the air-filled illumination channel (121), a light source (14) and a detector (15) respectively arranged at one end of two optical filters (13) away from the air-filled illumination channel (121); the air extraction component (2) comprises a heat-insulating air inlet pipe (21) horizontally arranged at a side end of the outer shell (11) and connected to the air-filled illumination channel (121), and an air inlet cap (22) arranged at one end of the heat-insulating air inlet pipe (21) away from the outer shell (11); the air inlet end of the air inlet cap (22) faces vertically downward; the outer wall of the heat-insulating air inlet pipe (21) is a heat-insulating layer, and the inner wall of the heat-insulating air inlet pipe (21) is an electric heating layer.

2. The severe weather closed-circuit CO2 and H2O analyzer as claimed in claim 1, characterized in that: A brushless chopper wheel (161) is rotatably arranged between the light source (14) and the optical filter (13), and the brushless chopper wheel (161) blocks light from the light source (14) toward the optical filter (13) at intervals of rotation.

3. The severe weather closed-circuit CO2 and H2O analyzer as claimed in claim 2, characterized in that: The housing (11) is provided with a relay chamber (16) on one side of the air-filled illumination channel (121) for the brushless chopper wheel (161) to rotate. The housing (11) is provided with a first storage chamber (17) and a second storage chamber (18) on the side of the relay chamber (16) away from the air-filled illumination channel (121). The light source (14) is disposed in the first storage chamber (17). The first storage chamber (17) and the relay chamber (16) are connected via a refraction channel (19). The refraction channel (19) is composed of holes connected in sequence and bent. A reflector (191) is provided at the bend of the refraction channel (19). The plurality of reflectors (191) reflect light emitted by the light source (14) to the optical filter (13).

4. The severe weather closed-circuit CO2 and H2O analyzer as claimed in claim 3, characterized in that: A brushless motor (181) is arranged in the second storage cavity (18); the brushless chopper wheel (161) is coaxially fixed with an output shaft of the brushless motor (181); the brushless chopper wheel (161) is provided with light-transmitting holes (1611) evenly spaced in a circumferential direction; the light-transmitting holes (1611) are aligned with the optical filter (13) in sequence as the brushless chopper wheel (161) rotates.

5. The severe weather closed-circuit CO2 and H2O analyzer as claimed in claim 4, characterized in that: The outer shell (11) is coaxially provided with an annular ventilation ring cavity (122) on the outer peripheral side of the inflation and illumination channel (121); the ventilation ring cavity (122) sucks the air in the inflation and illumination channel (121) and pumps it into the relay cavity (16); a heat exhaust hole (111) connected to the first storage cavity (17) and the second storage cavity (18) is provided at the side end of the outer shell (11); the air in the relay cavity (16) is exhausted along the heat exhaust hole (111) through the first storage cavity (17) and the second storage cavity (18).

6. The severe weather closed-circuit CO2 and H2O analyzer as claimed in claim 4, characterized in that: The axis of the light-transmitting hole (1611) is inclined to the rotation axis of the brushless chopper wheel (161), and the brushless chopper wheel (161) disturbs the air toward a side away from the air-filled illumination channel (121) as it rotates.

7. The severe weather closed-circuit CO2 and H2O analyzer as claimed in claim 4, characterized in that: The outer shell (11) has a plurality of circles of air inlet holes (124) evenly spaced apart on the inner wall of the inflation and illumination channel (121); the air inlet holes (124) are connected to the heat-insulating air inlet pipe (21); a circle of air outlet holes (126) is provided between two adjacent circles of the air inlet holes (124); the air outlet holes (126) are connected to the ventilation ring cavity (122).

8. The severe weather closed-circuit CO2 and H2O analyzer as claimed in claim 7, characterized in that: The outer shell (11) has a three-layer metal ring sleeve (12) built in. The three-layer metal ring sleeve (12) is a three-layer coaxial metal sleeve, the interior of the inner metal sleeve is the inflation and illumination channel (121), the ventilation ring cavity (122) is between the outer and middle metal sleeves, an intermediate cavity (123) is formed between the inner and middle metal sleeves, the intermediate cavity (123) is connected to the air inlet hole (124) and the heat-insulating air inlet pipe (21), the inner metal sleeve is integrally extended outward from the inner wall of the air outlet hole (126) to form a metal air guide tube (125), the other end of the metal air guide tube (125) is integrally connected to the ventilation ring cavity (122).

9. The severe weather closed-circuit CO2 and H2O analyzer as claimed in claim 1, characterized in that: The heat-insulating air intake pipe (21) comprises two separated sections, a particle filter (23) is arranged between the two sections of the heat-insulating air intake pipe (21), and an arc-shaped bridge (24) is connected to the upper side ends of the two sections of the heat-insulating air intake pipe (21).

10. The severe weather closed-circuit CO2 and H2O analyzer according to claim 9, characterized in that: The air intake cap (22) is narrow at the top and wide at the bottom, and the air intake end of the air intake cap (22) is coaxially provided with a plurality of circles of air guide rings (221) from bottom to top.

Images