Novel greenhouse gas measuring instrument of infrared absorption light cell

Abstract

The utility model relates to the technical field of gas detection, and discloses a novel greenhouse gas measuring instrument of an infrared absorption light pool, which comprises an absorption cavity, a gas inlet is arranged on the wall surface of the absorption cavity, an infrared emission head is arranged on the inner wall of the left end of the absorption cavity, and the outer end surface of the left end of the absorption cavity is connected with a motor through a left rotating shaft. An infrared detection plate is arranged at the right end of the absorption cavity through a connecting rod, a supporting cylinder is arranged on the outer end face of the infrared detection plate in the circumferential direction, the infrared detection plate is connected with a rotating plate through the supporting cylinder, and a right rotating shaft is arranged on the outer end face of the rotating plate; according to the novel greenhouse gas measuring instrument of the infrared absorption light cell, the absorption cavity is rotated and matched with an arc-shaped gas inlet hole formed in the absorption cavity, so that external gas can be collected into the absorption cavity, and the sensitivity of the whole measuring instrument is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, in particular to a greenhouse gas measuring instrument of a novel infrared absorption light pool. Background Art

[0002] When infrared gas sensors are used for air quality monitoring, they are mainly used to detect the carbon dioxide content in the air. Due to the greenhouse effect, carbon dioxide can absorb infrared rays, and this absorption can be used to measure the concentration of carbon dioxide per unit volume. The principle of infrared carbon dioxide sensors is to attenuate the radiation energy transmitted through the measurement chamber based on the absorption of infrared radiation by CO2 in a specific band. The degree of attenuation depends on the content of CO2 in the measured gas. The use of CO2 sensors can be seen everywhere in our daily life environment, such as kindergartens, schools, office buildings, shopping malls, supermarkets, stations, hospitals and other public places.

[0003] In the prior art, due to the limited emission diameter of infrared rays, if a gas with a fast flow rate enters the detection cell and absorbs infrared rays, the gas and the infrared rays are often not in sufficient contact, and the target gas cannot be detected completely and accurately. When the infrared rays emitted by the infrared light source fail to contact the gas to be detected entering the detection cell, the absorbed infrared rays will be reduced, thereby reducing the detection sensitivity of the entire detection system. Utility Model Content

[0004] (I) Technical problems solved: In view of the shortcomings of the existing technology, the utility model provides a greenhouse gas measuring instrument with a new infrared absorption light cell, which can ensure that the gas entering the detection cell is fully in contact with the infrared light and has higher sensitivity, thus solving the problem of insufficient contact between the infrared light and the detection gas and low detection sensitivity.

[0005] (II) Technical solution: In order to achieve the above-mentioned purpose of ensuring that the gas entering the detection pool is fully in contact with the infrared light and having higher sensitivity, the utility model provides the following technical solution: A greenhouse gas measuring instrument with a new infrared absorption light pool, comprising an absorption chamber, an air inlet hole is arranged on the wall surface of the absorption chamber, an infrared emitting head is arranged on the inner wall of the left end of the absorption chamber, the outer end face of the left end of the absorption chamber is connected to the motor through a left rotating shaft, the outer ring sleeve of the left rotating shaft is provided with a left support bearing, the left support bearing is connected to the left end pin through a coupling, the right end of the absorption chamber is provided with an infrared detection plate through a connecting rod, the outer end face of the infrared detection plate is provided with a supporting cylinder in the circumferential direction, and is connected to the rotating plate through the supporting cylinder, the outer end face of the rotating plate is provided with a right rotating shaft, the outer ring sleeve of the right rotating shaft is provided with a right support bearing, and the right support bearing is connected to the right end pin through a coupling.

[0006] Preferably, the air inlet holes are evenly distributed on the outer wall of the absorption chamber, and the cross-section of the air inlet holes is arc-shaped.

[0007] Preferably, the number of the air inlet holes is at least five rows, and the number of the air inlet holes in each row in the circumferential direction is at least four.

[0008] Preferably, the number of the supporting cylinders is at least three.

[0009] Preferably, the outer end surface of the right-rotating shaft is provided with a shaft end cover.

[0010] (III) Beneficial effects: Compared with the prior art, the utility model provides a new type of greenhouse gas measuring instrument with infrared absorption light pool, which has the following beneficial effects:

[0011] 1. A greenhouse gas measuring instrument with a novel infrared absorption light cell can collect external gas into the absorption cavity by rotating the absorption cavity and cooperating with the arc-shaped air inlet hole arranged on the absorption cavity. At the same time, since the air inlet hole adopts an arc-shaped aperture that fits the cylindrical surface of the absorption cavity itself, the gas has a certain inertial motion path before entering the absorption cavity. The gas entering the absorption cavity will move along the inner wall of the absorption cavity. With the arrangement of multiple air inlet holes, the gas entering the absorption cavity can fill the entire absorption cavity more evenly, thereby ensuring that there will be no uneven absorption when the gas absorbs infrared light energy in the absorption cavity, thereby greatly increasing the sensitivity of the entire measuring instrument.

[0012] 2. This new type of greenhouse gas measuring instrument with infrared absorption light cell can make the gas in the absorption cavity more evenly distributed in each space of the absorption cavity by rotating the absorption cavity, which can reduce the phenomenon of excessive or insufficient local gas. In addition, the problem of gas residue in the absorption cavity can be reduced by rotating the absorption cavity. In some cases, gas may remain in the absorption cavity, affecting subsequent measurements. The design of the rotating absorption cavity can make the gas more fully contact with and absorb infrared light, thereby reducing the possibility of residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A cross-sectional view of a greenhouse gas measuring instrument of a novel infrared absorption light cell in the utility model;

[0014] Figure 2 It is a gas motion trajectory diagram in the absorption cavity of a greenhouse gas measuring instrument of a novel infrared absorption light cell in the utility model;

[0015] Figure 3 This is a three-dimensional structural diagram of a greenhouse gas measuring instrument of a novel infrared absorption light cell in the utility model;

[0016] Figure 4This is a front view of a greenhouse gas measuring instrument with a novel infrared absorption light cell in the utility model.

[0017] In the figure: 1-absorption chamber, 2-air inlet, 3-infrared transmitter, 4-left rotating shaft, 5-motor, 6-left supporting bearing, 7-coupling, 8-left end pin, 9-support cylinder, 10-infrared detection board, 11-rotating plate, 12-right supporting bearing, 13-shaft end cover, 14-right end pin, 15-connecting rod, 16-right rotating shaft. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1 A greenhouse gas measuring instrument with a new type of infrared absorption light pool includes an absorption chamber 1, an air inlet 2 is arranged on the wall of the absorption chamber 1, an infrared emitting head 3 is arranged on the inner wall of the left end of the absorption chamber 1, and the outer end surface of the left end of the absorption chamber 1 is connected to the motor 5 through a left rotating shaft 4, and the outer ring of the left rotating shaft 4 is provided with a left support bearing 6.

[0020] First, the instrument is powered by an external power supply and the motor 5 is started. After the motor 5 is started, it drives the absorption chamber 1 to start rotating. When the absorption chamber 1 starts to rotate, the air inlet 2 on its wall wraps the gas in the external environment into the absorption chamber 1. Since the air inlet 2 is equidistant and has a circular arc cross-section, it ensures that the gas can enter the absorption chamber 1 evenly and quickly. As the absorption chamber 1 rotates, the incoming gas is fully mixed in the chamber so that it is evenly distributed in the absorption chamber 1. At this time, the infrared emission head 3 at the left end of the absorption chamber 1 emits infrared light, and the molecules in the gas will absorb infrared light of a specific wavelength, which depends on the type and concentration of the gas molecules. The infrared light absorbed by the gas is irradiated onto the infrared detection board 10 at the right end of the absorption chamber 1. The change in infrared light energy on the detection board reflects the content of each component in the gas. The data processing system inside the instrument analyzes the change in light energy on the infrared detection board 10 to determine the concentration of each component in the gas and output the result through the display screen or external interface. The instrument can be set to continuous working mode to continuously monitor the greenhouse gas concentration in the environment and update the data in real time.

[0021] The instrument uses infrared spectroscopy technology to determine the concentration of each component in the gas by measuring the degree of gas absorption of infrared light. The rotating design of the absorption chamber 1 helps to evenly distribute and mix the gas and improve the accuracy of the measurement. At the same time, the structural design of the drive and support bearings of the motor 5 ensures the stable rotation of the absorption chamber 1.

[0022] The rotation of the absorption chamber 1 and the uniform distribution of the gas reduce the measurement error caused by uneven gas distribution and improve the accuracy of the measurement. The design of the instrument ensures that the gas can quickly enter and exit the absorption chamber 1, thereby achieving a fast measurement response. The rotation design helps to reduce the residual gas in the absorption chamber 1 and avoid interference with subsequent measurements. The structural design of the instrument ensures its stability during long-term continuous operation and is suitable for long-term greenhouse gas monitoring applications.

[0023] See also Figure 2 , the figure is an interface diagram of the absorption chamber 1, the outer circle arrow and the spiral thin line are the gas movement trajectory, the inner circle center arrow is the rotation direction of the absorption chamber 1, the absorption chamber 1 is driven by the motor 5 to rotate, and the external gas enters the absorption chamber 1 through the air inlet 2. Since the absorption chamber 1 continues to rotate, the gas entering the absorption chamber 1 has a circumferential movement path relative to the absorption chamber 1, so that the gas entering the absorption chamber 1 will follow Figure 2 The gas moves in the general direction of the arrow in the figure. Multiple gases enter and collide with each other. With the rotation of the absorption chamber 1, the gases entering are evenly mixed.

[0024] See also Figure 3-4 The left support bearing 6 is connected to the left end pin 8 through a coupling 7, and an infrared detection plate 10 is provided at the right end of the absorption chamber 1 through a connecting rod 15. A supporting cylinder 9 is provided on the outer end surface of the infrared detection plate 10 in the circumferential direction, and the infrared detection plate 10 is connected to a rotating plate 11 through the supporting cylinder 9. A right rotating shaft 16 is provided on the outer end surface of the rotating plate 11, and a right support bearing 12 is provided on the outer ring of the right rotating shaft 16. The right support bearing 12 is connected to the right end pin 14 through a coupling 7.

[0025] The left support bearing 6 and the right support bearing 12 are respectively located at the left and right ends of the absorption chamber 1, and are connected to the corresponding pins through the coupling 7, ensuring the stability of the absorption chamber 1 during rotation. The design of the bearing reduces friction, allowing the absorption chamber 1 to rotate more smoothly, reducing energy loss and wear. The coupling 7, as a power transmission device, effectively transmits the power of the motor 5 to the absorption chamber 1, so that it can rotate at a constant speed and direction. This design ensures that the gas is evenly distributed in the absorption chamber 1 while also ensuring full contact between the infrared light and the gas. Due to the existence of the coupling 7, when the rotation mechanism of the absorption chamber 1 needs to be maintained or adjusted, it can be achieved by disconnecting the coupling 7 without disassembling the entire instrument. This greatly simplifies the maintenance process and improves the maintainability of the instrument. Through the carefully designed support bearing and coupling 7, this structure can reduce the vibration and noise that may be generated during the rotation process, and improve the overall performance and comfort of the instrument. The high-quality materials and precision design of the support bearing and coupling 7 ensure their durability under long-term continuous work, thereby extending the service life of the entire instrument.

[0026] The air inlet holes 2 are evenly distributed on the outer wall of the absorption chamber 1, and the cross section of the air inlet holes 2 is arc-shaped. The number of the air inlet holes 2 is at least five rows, and the number of the air inlet holes 2 in each row in the circumferential direction is at least four. The number of the supporting cylinders 9 is at least three.

[0027] The air inlet holes 2 are evenly distributed on the outer wall of the absorption chamber 1, ensuring that the gas can enter the absorption chamber 1 evenly and stably. This uniform distribution avoids excessive concentration of gas in certain areas, thereby improving the contact efficiency between the gas and the infrared light and the measurement accuracy. The cross-section of the air inlet hole 2 is an arc shape, and this shape design helps to optimize the flow characteristics of the gas. The arc-shaped cross-section can reduce turbulence and resistance during gas flow, allowing the gas to enter the absorption chamber 1 more smoothly, further improving the uniformity of gas distribution. Through the design of at least five rows of air inlet holes 2, the number of air inlet holes 2 in each row in the circumferential direction is at least four. This layout increases the contact area between the gas and the absorption chamber 1, thereby improving the gas exchange efficiency. More air inlet holes 2 mean that more gas can enter the absorption chamber 1 at the same time, which speeds up the speed of gas renewal and helps to promptly reflect the changes in gas concentration in the environment. The design of at least three supporting cylinders 9 provides stable structural support. Multiple supporting cylinders 9 jointly support the infrared detection plate 10 to ensure that it remains stable and stable during rotation. This structure enhances the overall rigidity and shock resistance of the instrument and reduces measurement errors caused by vibration or external interference.

[0028] The outer end surface of the right rotating shaft 16 is provided with a shaft end cover 13 .

[0029] The presence of the shaft end cover 13 can effectively seal the outside of the right-rotating shaft 16 and prevent gas or other external impurities from entering the absorption chamber 1 from the shaft end. This ensures the cleanliness and stability of the internal environment of the absorption chamber 1 and prevents external interference from affecting the measurement results. If the right-rotating shaft 16 uses a lubrication system to reduce friction and wear, the shaft end cover 13 can effectively prevent the lubricating oil from leaking out of the shaft end. This is essential to keep the instrument clean and operating normally, and also extends the service life of the lubricating oil. The shaft end cover 13 can protect the end face of the right-rotating shaft 16 from external impact and damage. During the use of the instrument, the shaft end may be accidentally hit or rubbed. The presence of the shaft end cover 13 can reduce the possibility of such damage and maintain the integrity and service life of the shaft end. The design of the shaft end cover 13 is usually coordinated with the appearance of the instrument, which not only provides the above-mentioned functional advantages, but also improves the overall aesthetics of the instrument. The neat appearance design helps to enhance the professional image and user experience of the instrument.

[0030] Working principle: The absorption chamber 1 is driven to rotate by the motor 5, and the arc-shaped air inlet 2 attached to the wall of the absorption chamber 1 wraps the external gas into the absorption chamber 1. The absorption chamber 1 continues to rotate so that the wrapped gas is fully mixed in the absorption chamber 1, so that it is evenly distributed in the absorption chamber 1. At this time, the gas absorbs infrared light energy and irradiates the infrared detection plate 10. The content of each component in the gas is obtained by analyzing the infrared light energy on the detection plate. The absorption chamber 1 in the rotating process can discharge the internal gas in time and let the external gas enter to achieve rapid circulation. In some cases, the gas may remain in the absorption chamber 1, affecting subsequent measurements. The design of the rotating absorption chamber 1 allows the gas to be more fully exposed to infrared light and absorbed, thereby reducing the possibility of residue.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A greenhouse gas measuring instrument with a novel infrared absorption cell, comprising an absorption chamber (1), characterized in that: An air inlet (2) is arranged on the wall surface of the absorption chamber (1); an infrared emitting head (3) is arranged on the inner wall of the left end of the absorption chamber (1); the outer end surface of the left end of the absorption chamber (1) is connected to the motor (5) via a left rotating shaft (4); the outer ring of the left rotating shaft (4) is provided with a left support bearing (6); the left support bearing (6) is connected to the left end pin (8) via a coupling (7); an infrared detection plate (10) is arranged at the right end of the absorption chamber (1) via a connecting rod (15); a support cylinder (9) is arranged on the outer end surface of the infrared detection plate (10) in the circumferential direction; the infrared detection plate (10) is connected to the rotating plate (11) via the support cylinder (9); a right rotating shaft (16) is arranged on the outer end surface of the rotating plate (11); the outer ring of the right rotating shaft (16) is provided with a right support bearing (12); the right support bearing (12) is connected to the right end pin (14) via a coupling (7).

2. The greenhouse gas measuring instrument of the novel infrared absorption cell according to claim 1 is characterized in that: The air inlet holes (2) are distributed at equal intervals on the outer wall of the absorption chamber (1), and the cross-section of the air inlet holes (2) is in the shape of an arc.

3. The greenhouse gas measuring instrument of the novel infrared absorption cell according to claim 1 is characterized in that: The number of the air inlet holes (2) is at least five rows, and the number of the air inlet holes (2) in each row in the circumferential direction is at least four.

4. The greenhouse gas measuring instrument of the novel infrared absorption cell according to claim 1 is characterized in that: The number of the supporting cylinders (9) is at least three.

5. The greenhouse gas measuring instrument of the novel infrared absorption cell according to claim 1 is characterized in that: The outer end surface of the right-hand rotating shaft (16) is provided with a shaft end cover (13).

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