Carbon dioxide collection device for atmospheric monitoring

Abstract

This invention relates to the field of atmospheric monitoring technology, and more particularly to a carbon dioxide collection device for atmospheric monitoring, comprising: a support tube; a fixed bracket, conical in shape and fixed to the top of the support tube; a housing, fixed to the upper surface of the fixed bracket, for accommodating a filter assembly and forming a sampling airflow channel; a wind-adaptive air intake assembly, rotatably connected to the upper end of the housing, for automatically turning the air inlet to the leeward side; an air extraction power assembly, installed inside the fixed bracket, for forming a directional airflow inside the device; and a negative pressure storage tank, installed on the bottom plate of the support tube. This invention uses a vertical wing to drive the air intake square tube to automatically turn the air inlet to the leeward side, effectively avoiding direct wind and sand; the windbreak frame, driven by wind force, moves a limiting block to lock the fixing ring, stably locking the air intake square tube; this double windproof design avoids wind and sand intrusion, prevents airflow swaying, and ensures stable and reliable sampling.

Description

Technical Field

[0001] This invention relates to the field of atmospheric monitoring technology, and in particular to a carbon dioxide collection device for atmospheric monitoring. Background Technology

[0002] In the field of atmospheric environmental monitoring, carbon dioxide is a key greenhouse gas, and the accuracy of its concentration data is directly related to climate change research, carbon emission accounting, and the formulation of carbon neutrality policies. To obtain representative background atmospheric samples, monitoring devices typically need to be deployed long-term in the field or on the outskirts of cities to continuously collect ambient air data.

[0003] Traditional stationary carbon dioxide collection devices often employ a design with a constant air inlet direction. However, such open environments frequently face complex meteorological conditions, especially extreme weather events like sandstorms and strong winds, posing a severe challenge to the stability and data reliability of the sampling system. When strong winds occur, the fixed-direction air inlet is easily exposed to the wind, causing large amounts of dust, water vapor, or pollutants to be carried into the sampling system by the high-speed airflow. This can clog filters, contaminate adsorption materials, or damage high-precision sensors, significantly shortening equipment maintenance cycles and increasing operation and maintenance costs. Furthermore, instantaneous airflow disturbances can cause drastic fluctuations in carbon dioxide concentration measurements, significantly deviating from the true background levels, thus limiting the applicability of the device in arid, semi-arid, or windy regions. To address these issues, some designs in recent years have attempted to introduce physical barriers or actively close the air inlet to reduce the impact of sandstorms. While the former can block some particulate matter, it may alter the local flow field around the air inlet, disrupting the aerodynamic characteristics of the sampling and introducing sampling bias. The latter, while protecting the equipment in extreme weather, completely interrupts data acquisition during strong winds, causing discontinuities in the monitoring time series and resulting in the loss of crucial environmental change information.

[0004] Therefore, there is an urgent need for an adaptive air intake structure that can both avoid the impact of wind and sand and maintain continuous and effective sampling, so as to balance equipment protection and data integrity. Summary of the Invention

[0005] To overcome the shortcomings of existing carbon dioxide collection devices, such as the inlet being easily contaminated by sand and dust in severe weather conditions, leading to fluctuations or interruptions in sampling data, and the inability of existing protective measures to balance continuous sampling and equipment protection, this invention provides a carbon dioxide collection device for atmospheric monitoring.

[0006] A carbon dioxide collection device for atmospheric monitoring includes: a support pipe serving as the main load-bearing structure; a fixed bracket, conical in shape, fixed to the top of the support pipe; a housing, fixed to the upper surface of the fixed bracket, for housing a filter assembly and forming a sampling airflow channel; a wind-adaptive air intake assembly, rotatably connected to the upper end of the housing, for automatically turning the air inlet towards the leeward side; a suction power assembly, installed inside the fixed bracket, for forming a directional airflow inside the device; a negative pressure storage tank, installed on the bottom plate of the support pipe, for collecting and storing gas samples; a gas pipe, one end connected to the air inlet of the negative pressure storage tank, and the other end extending into the housing; a solenoid valve, located at the end of the gas pipe near the negative pressure storage tank, for controlling the opening and closing of the gas path; a filter assembly, located inside the housing, for progressively purifying the incoming airflow; and a gravity-triggered automatic dust removal assembly, located at the bottom of the housing, for automatically opening to remove dust when the accumulated dust reaches a set weight, and automatically resetting and sealing after emptying.

[0007] To further explain, the wind direction adaptive air intake assembly includes: an air intake square tube, which is rotatably connected to the upper end of the housing; and a vertical wing, which is fixed to the top of the air intake square tube and serves as a wind direction sensing element. Its windward area is larger than that of the air intake square tube and is used to drive the air intake square tube to rotate until it is parallel to the wind direction.

[0008] To further explain, the air extraction power assembly includes: a motor, installed inside the lower part of the fixed bracket; a first fan blade and a second fan blade, which are fixedly connected to the motor output shaft via a coupling and rotate coaxially; wherein, the air inlet end of the air pipe is located inside the outer casing and is lower than the first fan blade to avoid interference.

[0009] Further explanation: The filter assembly includes: an annular support frame, fixed to the inner wall of the outer shell, dividing the interior of the outer shell into an outer compartment and an inner compartment; a first filter screen, conical in shape, fixed to the support frame, forming a filter chamber together with the support frame, and housing the first fan blade inside; a second filter screen arranged obliquely, located inside the air inlet square tube near the air inlet; and a discharge port on the bottom wall of the air inlet square tube near the second filter screen, used to allow the sand and gravel blocked by the second filter screen to slide down and be discharged under gravity.

[0010] Further explanation includes: an air velocity sensor, installed on the top of the air intake square tube, used to monitor the ambient wind speed in real time; and a control module, electrically connected to the air velocity sensor, solenoid valve, and motor, used to intelligently control the sampling start and stop according to a preset wind speed threshold.

[0011] Further explanation includes a locking assembly for locking the air intake square tube in its current position under windy conditions; the locking assembly includes: fixed guide rails, symmetrically fixed to the air intake square tube; a wind deflector, slidably connected between the two fixed guide rails in the horizontal direction; a spring, connected between the wind deflector and each fixed guide rail, sleeved on the wind deflector, for providing a restoring force; an arc-shaped limiting block, fixed to the left end of the wind deflector; a fixing ring, fixed to the upper end of the outer shell and close to the limiting block; and a rubber pad, located inside the limiting block and outside the fixing ring, for increasing contact friction.

[0012] Further explanation: The gravity-triggered automatic waste removal component includes: a dustproof sealing base, located at the bottom of the outer shell, used to seal the gap between the fixed bracket and the outer shell; the dustproof sealing base has a circular groove matching the thickness of the outer shell side wall, its outer wall is a downward-sloping conical surface and its inner wall is an upward-sloping conical surface; a fixed cover, fixed to the outside of the outer shell, covering the dustproof sealing base inside; a telescopic rod, symmetrically arranged on the left and right, its fixed end fixed to the inner side of the top wall of the fixed cover, and its telescopic end fixed to the dustproof sealing base; a first magnet, fixed to the fixed part of the telescopic rod; a second magnet, fixed to the telescopic part of the telescopic rod, and magnetically attracted to the first magnet; the outer shell has four arc-shaped waste removal windows circumferentially opened on the side near the fixed cover, used to connect the outer compartment and the internal space of the fixed cover.

[0013] To further explain, an outer layer of debris storage area is formed between the outer wall of the outer shell and the inner wall of the fixed cover, which is used to receive sand and gravel entering through the arc-shaped debris discharge window and accumulate on the outer wall of the dustproof sealing base; an inner layer of debris storage area is formed between the inner wall of the outer shell and the top conical surface of the fixed bracket, which is used to receive the settled fine sand and gravel and let it slide onto the inner wall of the dustproof sealing base; when the weight of the accumulated dust exceeds the magnetic attraction between the first magnet and the second magnet, the dustproof sealing base moves downward to open the debris discharge, and after emptying, it is driven by the magnetic attraction to reset the seal.

[0014] The beneficial effects of this invention are as follows: By rotating the vertical wing and the air inlet square tube, this invention achieves an adaptive function in which the air inlet always automatically turns to the leeward side, effectively avoiding direct wind and sand, while maintaining continuous sampling; in conjunction with the wind deflector in the positioning assembly, driven by wind force, the limiting block and the fixing ring are rubbed and locked, stably locking the air inlet square tube in the current position; this dual windproof design not only solves the problem of traditional fixed air inlets being easily attacked by wind and sand, but also avoids the airflow channel shaking, ensuring a stable and reliable sampling process.

[0015] This invention employs an integrated design of multi-stage filtration and gravity-triggered automatic dust removal: the obliquely positioned second filter screen performs preliminary filtration and self-cleaning, the conical first filter screen performs secondary filtration and guides the sand and gravel to the outer dust storage area, and the top surface of the fixed bracket receives the fine sand and gravel to form the inner dust storage area; when the weight of the accumulated dust exceeds the magnetic attraction force of the first and second magnets, the dustproof sealing base automatically moves down to remove the dust, and after emptying, the magnetic force resets the seal, realizing periodic maintenance-free dust removal and significantly reducing field operation and maintenance costs.

[0016] This invention monitors wind speed in real time using an airflow sensor and combines it with a control module to intelligently start and stop the motor and solenoid valve, ensuring that collection only occurs during the optimal sampling window and avoiding damage to the equipment from strong winds or sample distortion under static and stable conditions. At the same time, it uses a single motor to drive double-layer fan blades to form directional airflow, resulting in a compact structure and low energy consumption. The air inlet end of the air pipe is positioned lower than the first fan blade to avoid fan blade interference, resulting in high overall integration and strong reliability. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the fixed bracket and motor components of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, including the outer shell, the air intake square tube, and the air flow sensor.

[0021] Figure 5 This is a three-dimensional structural diagram of the windshield, spring, and limiting block components of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the components of the present invention, including the fixing cover, telescopic rod, and dustproof sealing base.

[0023] Figure 7 This is a three-dimensional structural cross-sectional view of the components of the present invention, including the fixing bracket, the outer shell, and the dustproof sealing base.

[0024] Figure 8 This is a three-dimensional structural diagram of the telescopic rod, the first magnet, and the second magnet of the present invention.

[0025] In the attached diagrams: 101: Support tube, 102: Outer shell, 103: Negative pressure storage tank, 104: Air pipe, 105: Solenoid valve, 106: Motor, 107: First fan blade, 108: Support frame, 109: First filter screen, 110: Second fan blade, 111: Inlet square tube, 112: Second filter screen, 113: Vertical wing, 114: Air flow rate sensor, 115: Fixed bracket, 201: Fixed guide rail, 202: Wind deflector, 203: Spring, 204: Fixed ring, 205: Limiting block, 301: Fixed cover, 302: Telescopic rod, 303: First magnet, 304: Second magnet, 305: Dustproof sealed base. Detailed Implementation

[0026] The invention will now be described more fully below with reference to the accompanying drawings, in which presently preferred embodiments of the invention are shown. However, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and to fully convey the scope of the invention to those skilled in the art.

[0027] Example 1: A carbon dioxide collection device for atmospheric monitoring, such as Figures 1-4 As shown, it includes a support tube 101 as the main body of the support tube, a tapered fixed bracket 115 is fixed to the top of the support tube 101, and a housing 102 is fixed to the upper surface of the fixed bracket 115. The housing 102 is used to accommodate the filter assembly and form a sampling airflow channel.

[0028] A motor 106 is installed in the lower part of the fixed bracket 115. The output shaft of the motor 106 extends from the middle of the top wall of the fixed bracket 115 and is fixedly connected to a first fan blade 107 and a second fan blade 110 that rotate coaxially via a coupling. A single power source drives the double-layer fan blades to form a directional airflow inside the device, providing suction power for gas sampling.

[0029] The upper end of the outer casing 102 is rotatably connected to an air intake square tube 111, and a vertical wing 113 is fixedly attached to its top. The vertical wing 113 acts as a wind direction sensing element, using wind power to drive the entire air intake square tube 111 to rotate. When the wind blows, the wind pressure on the vertical wing 113 is greater than that on the air intake square tube 111, pushing the entire component to rotate until the vertical wing 113 is parallel to the wind direction and the force is balanced. Through this adaptive rotation, the air inlet of the air intake square tube 111 is always automatically turned to the leeward side, effectively avoiding direct wind and sand, while maintaining continuous sampling, solving the problem that traditional fixed air inlets are easily affected by wind and sand.

[0030] A negative pressure storage tank 103 is installed on the base plate of the support tube 101 for collecting and storing the collected gas samples. An air pipe 104 is connected to the air inlet of the negative pressure storage tank 103. A solenoid valve 105 is installed at one end of the air pipe 104 near the negative pressure storage tank 103 for precisely controlling the flow of gas according to control commands. The air pipe 104 enters from the lower part and exits from the upper part of the support tube 101, finally exiting from the top wall of the fixed bracket 115. Its air inlet is located inside the outer shell 102 and below the first fan blade 107 to prevent interference between the fan blade and the air pipe 104 during fan blade rotation.

[0031] The housing 102 is equipped with a filter assembly for progressively purifying the incoming airflow, protecting downstream equipment, and improving sample purity. The filter assembly includes an annular support frame 108 fixed to the inner wall of the housing 102, which divides the interior of the housing 102 into an internal space and an external space. A conical first filter screen 109 is fixed to the support frame 108, and the output shaft of the motor 106 passes through the center of the first filter screen 109. The first filter screen 109 and the support frame 108 together form a filter chamber, which encloses the first fan blade 107 for secondary filtration of the airflow entering the first fan blade 107, while preventing large particles from contacting the fan blade.

[0032] The first fan blade 107 is located inside the support frame 108 and directly below the first filter screen 109, while the second fan blade 110 is located directly above the first filter screen 109. A second filter screen 112 is obliquely arranged inside the air inlet square tube 111 near the air inlet, used for preliminary filtration of the airflow entering the device, and the oblique surface enables self-cleaning of the filter screen.

[0033] Through the above structure, the support frame 108 and the inner wall of the outer shell 102 divide the internal space into an outer compartment and an inner compartment: the airflow entering the air intake square pipe 111 is first filtered by the second filter screen 112 before entering the outer compartment, and then filtered a second time by the first filter screen 109 before entering the inner compartment, and finally stored in the negative pressure storage tank 103 through the air pipe 104, forming a complete multi-stage filtration path.

[0034] like Figure 3 and Figure 4 As shown, specifically, the bottom wall of the air intake square tube 111 has a discharge port on the side near the second filter screen 112. Because the second filter screen 112 is set at an angle, the sand and gravel in the airflow are blocked by the filter screen and fall down under the action of gravity, and are automatically discharged from the device through the discharge port, which is used to prevent the second filter screen 112 from being blocked and to achieve maintenance-free operation.

[0035] An air velocity sensor 114 is installed on the top of the air intake square tube 111 for real-time monitoring of ambient wind speed. The air velocity sensor 114 is electrically connected to the solenoid valve 105 and the motor 106 through a control module, which is used to intelligently control the start and stop of sampling according to a preset wind speed threshold: when the wind speed is within the optimal sampling window (e.g., 2-6 m / s), the motor 106 is automatically started and the solenoid valve 105 is opened for sampling; when the wind speed is too high or too low, sampling is automatically stopped to protect the equipment and ensure the representativeness of the sample.

[0036] like Figure 5 As shown, specifically, the air intake square tube 111 is provided with a locking component, which is used to lock the air intake square tube 111 in the current position under windy conditions to prevent the airflow channel from shaking.

[0037] The positioning assembly includes fixed guide rails 201 symmetrically fixed to the front and rear of the air intake square tube 111, and a wind deflector 202 is slidably connected between the two fixed guide rails 201 in the horizontal direction. The wind deflector 202 is connected to each fixed guide rail 201 by springs 203, each spring 203 being sleeved on the wind deflector 202 to provide a restoring force. An arc-shaped limiting block 205 is fixed to the left end of the wind deflector 202, and a fixing ring 204 is fixed to the upper end of the outer shell 102 on the side near the limiting block 205.

[0038] Furthermore, rubber pads are provided on the inner side of the limiting block 205 and the outer side of the fixing ring 204 to increase contact friction.

[0039] like Figures 6-8 As shown, the bottom of the outer casing 102 is provided with a dustproof sealing base 305, which is used to seal the gap between the fixing bracket 115 and the outer casing 102, so that the bottom of the outer casing 102 forms a relatively sealed state, ensuring that the airflow path is controllable. Air enters the outer casing 102 through the air inlet square pipe 111, and finally enters the negative pressure storage tank 103 through the air pipe 104. At the same time, the dustproof sealing base 305 serves as an automatic impurity discharge actuator, which can automatically open the impurity discharge when the accumulated dust reaches a certain weight.

[0040] Specifically, the dustproof sealing base 305 has a circular groove that matches the thickness of the side wall of the outer shell 102, which is used to form a sealing fit with the bottom of the outer shell 102. The outer wall of the dustproof sealing base 305 is set with a downward-sloping conical surface and the inner wall is set with an upward-sloping conical surface. This double-conical structure is used to guide sand and gravel to slide off and avoid accumulation.

[0041] To achieve the automatic dust removal function, the outer shell 102 is equipped with a gravity-triggered automatic dust removal component, which is used to automatically open the dust removal when the accumulated dust reaches a certain weight, and automatically reset and seal after emptying.

[0042] The automatic debris removal assembly includes a fixed cover 301 fixed to the outside of the housing 102. The fixed cover 301 encloses the dustproof sealing base 305 within it, forming a closed debris storage space. Symmetrical telescopic rods 302 are fixed to the inner side of the top wall of the fixed cover 301. The telescopic ends of the two telescopic rods 302 are fixed to the dustproof sealing base 305, guiding the vertical movement of the dustproof sealing base 305. A first magnet 303 is fixed to the fixed part of each telescopic rod 302, and a second magnet 304 corresponding to the first magnet 303 is fixed to the telescopic part. Adjacent first magnets 303 and second magnets 304 magnetically attract each other, forming a magnetic reset mechanism.

[0043] Specifically, the outer shell 102 has four evenly distributed arc-shaped drainage windows along its circumference on the side near the fixing cover 301, serving as channels for sand and gravel to enter the storage area. The top wall of the fixing cover 301 is higher than the arc-shaped drainage windows to prevent the discharged sand and gravel from flowing back in.

[0044] An annular gap is formed between the outer wall of the outer shell 102 and the inner wall of the fixing cover 301, which is set as an outer impurity storage area. This area is connected to the outer compartment formed between the outer wall of the support frame 108 and the inner wall of the outer shell 102 through an arc-shaped impurity discharge window. The sand and gravel blocked by the first filter screen 109 slides down the conical surface, enters the outer impurity storage area through the arc-shaped impurity discharge window, and accumulates on the outer wall of the dustproof sealing base 305.

[0045] Meanwhile, an inner layer of impurities is formed between the inner wall of the outer shell 102 and the top conical surface of the fixed bracket 115. When the airflow enters the support frame 108 through the first filter screen 109, the tiny sand particles remaining in the airflow impact the top surface of the fixed bracket 115 under inertia and settle down, sliding down the top slope of the fixed bracket 115 onto the inner wall of the dustproof sealing base 305, thus achieving bidirectional dust accumulation on both the inner and outer walls.

[0046] Working Principle: To obtain representative background atmospheric samples, this device needs to be deployed in the field for extended periods to continuously collect air. Meteorological conditions are a key factor affecting sampling quality: under light winds or calm conditions, local emissions can easily lead to fluctuations in CO2 concentration, resulting in poor sample representativeness; strong winds (greater than 8 m / s) may stir up dust and clog the filter, damaging the equipment; moderate wind speeds (2-6 m / s) are conducive to forming uniform regional mixing, representing the optimal sampling window. This device, through its adaptive structure and intelligent control, achieves continuous and stable sampling in complex windy and sandy environments.

[0047] Once the device is installed, the vertical wing 113, acting as a wind direction sensing element, continuously receives wind. Because the windward area of ​​the vertical wing 113 is larger than that of the air intake square tube 111, it experiences greater wind pressure, pushing the entire air intake square tube 111 to rotate around the upper end of the outer casing 102 until the vertical wing 113 is parallel to the wind direction and the forces are balanced. At this point, the air inlet of the air intake square tube 111 automatically turns towards the leeward side, effectively avoiding direct wind and sand while maintaining an unobstructed air intake channel, enabling continuous sampling.

[0048] When the air intake square tube 111 is turned to the leeward side, the wind force simultaneously acts on the wind deflector 202. Driven by wind pressure, the wind deflector 202 slides along the fixed guide rail 201 towards the fixed ring 204, causing the limiting block 205 to approach the fixed ring 204, and the spring 203 is stretched. When the limiting block 205 and the fixed ring 204 are in close contact, the rubber pads on their surfaces generate sufficient friction to lock the air intake square tube 111 in its current position, resisting wind disturbance, ensuring the stability of the airflow channel, and improving sampling consistency.

[0049] When the wind force weakens or the wind direction changes, causing the wind deflector 202 to experience less force, the spring 203 releases its elastic potential energy, driving the wind deflector 202 to slide in the opposite direction along the fixed guide rail 201, causing the limiting block 205 to separate from the fixed ring 204, so that the air intake square tube 111 can return to a free rotation state in order to respond to changes in wind direction again.

[0050] The air velocity sensor 114 at the top of the air intake square tube 111 monitors the ambient wind speed in real time and transmits the signal to the control module. When the wind speed reaches the preset optimal sampling threshold (e.g., 2-6 m / s), the control module starts the motor 106 and opens the solenoid valve 105; when the wind speed exceeds the safe range, sampling is automatically stopped to protect the equipment and ensure sample representativeness.

[0051] After the motor 106 starts, it drives the coaxially rotating first fan blade 107 and second fan blade 110 to rotate. The two fan blades use inclined blades to generate directional airflow, forming a negative pressure zone inside the device, and drawing in external air through the air intake square pipe 111.

[0052] After entering the air intake square tube 111, the outside air undergoes three stages of purification.

[0053] Firstly, the angled second filter 112 blocks large particles of sand and gravel. The blocked sand and gravel slide down under gravity and are automatically discharged through the discharge port at the bottom of the air inlet square pipe 111, achieving self-cleaning of the filter and preventing clogging.

[0054] Secondly, the pre-filtered airflow enters the outer compartment of the outer shell 102, and then enters the inner compartment through the first filter screen 109. The sand and gravel intercepted by the first filter screen 109 slides down the conical surface, passes through the arc-shaped debris discharge window opened around the outer shell 102, and enters the outer layer debris storage area formed between the outer wall of the outer shell 102 and the inner wall of the fixed cover 301, accumulating on the outer wall of the dustproof sealing base 305.

[0055] Finally, a very small amount of fine sand that penetrated the first filter screen 109 entered the support frame 108 with the airflow. Under inertia, the sand impacted the top surface of the fixed support 115 and settled, sliding down the top slope of the fixed support 115 onto the inner wall of the dustproof sealing base 305, forming an inner impurity storage area. The clean airflow then entered the negative pressure storage tank 103 through the air pipe 104 for storage, completing the collection process.

[0056] As the device continues to operate, the amount of sand and gravel accumulating in the inner and outer impurity storage areas gradually increases, and the weight borne by the dustproof sealing base 305 continuously increases. When the total weight exceeds the magnetic attraction force between the first magnet 303 and the second magnet 304, the dustproof sealing base 305 overcomes the magnetic force and moves downward, the telescopic rod 302 extends accordingly, and the second magnet 304 separates from the first magnet 303.

[0057] As the dustproof sealing base 305 moves downward, it detaches from the bottom surface of the outer shell 102 and the fixing cover 301, forming an open channel in the inner and outer layers where debris accumulates. Under the action of gravity, the accumulated sand and gravel slide rapidly down the double-conical surface (outer wall sloping downward and inner wall sloping upward) of the dustproof sealing base 305 and are discharged outside the device.

[0058] After the sand and gravel are emptied, the weight of the dustproof sealing base 305 is reduced. Under the magnetic attraction of the first magnet 303 and the second magnet 304, the telescopic rod 302 retracts, causing the dustproof sealing base 305 to return to its original position and reseal the bottom of the outer shell 102, restoring the sealing state. This process is performed automatically and periodically, achieving maintenance-free dust removal and significantly reducing on-site operation and maintenance costs.

[0059] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A carbon dioxide collection device for atmospheric monitoring, characterized in that it comprises: The support pipe (101) serves as the main load-bearing component; The fixed bracket (115) is fixed to the top of the support tube (101) and is conical; The outer casing (102) is fixed to the upper surface of the fixed bracket (115) to accommodate the filter assembly and form a sampling airflow channel; The wind direction adaptive air intake assembly is rotatably connected to the upper end of the housing (102) to make the air intake always automatically turn to the leeward side; The suction power assembly is installed in the fixed bracket (115) to form a directional airflow inside the device; the negative pressure storage tank (103) is installed on the bottom plate of the support tube (101) to collect and store gas samples; the air pipe (104) is connected at one end to the air inlet of the negative pressure storage tank (103) and at the other end extends into the outer shell (102); A solenoid valve (105) is located at one end of the air pipe (104) near the negative pressure storage tank (103) and is used to control the opening and closing of the air passage; A filter assembly, located inside the housing (102), is used to purify the incoming airflow step by step; And a gravity-triggered automatic dust removal component, located at the bottom of the housing (102), is used to automatically open the dust removal when the accumulated dust reaches a set weight, and automatically reset and seal after emptying.

2. A carbon dioxide collection device for atmospheric monitoring according to claim 1, characterised in that, The wind direction adaptive air intake assembly includes: The air intake square tube (111) is rotatably connected to the upper end of the outer casing (102); The vertical wing (113) is fixed to the top of the air intake square tube (111) and serves as a wind direction sensing element. Its frontal area is larger than that of the air intake square tube (111) and is used to drive the air intake square tube (111) to rotate until it is parallel to the wind direction.

3. A carbon dioxide collection device for atmospheric monitoring according to claim 2, characterized in that, The air extraction power assembly includes: The motor (106) is installed inside the lower part of the fixed bracket (115); The first blade (107) and the second blade (110) are fixedly connected to the output shaft of the motor (106) via a coupling and rotate coaxially. The air inlet of the trachea (104) is located inside the outer shell (102) and below the first fan blade (107) to avoid interference.

4. A carbon dioxide collection device for atmospheric monitoring according to claim 3, characterized in that, The filtering component includes: The annular support frame (108) is fixed to the inner wall of the outer shell (102) and divides the interior of the outer shell (102) into an outer compartment and an inner compartment; The first filter screen (109) is cone-shaped and fixed to the support frame (108). Together with the support frame (108), it forms a filter chamber and covers the first fan blade (107) inside it. The second filter screen (112) is set at an angle inside the air intake square tube (111) near the air intake port; The bottom wall of the air intake square tube (111) has a discharge port on the side near the second filter screen (112) to allow the sand and gravel blocked by the second filter screen (112) to slide down and be discharged under the action of gravity.

5. A carbon dioxide collection device for atmospheric monitoring according to claim 4, characterized in that, Also includes: An air velocity sensor (114) is installed on the top of the air intake square tube (111) to monitor the ambient wind speed in real time; a control module is electrically connected to the air velocity sensor (114), the solenoid valve (105), and the motor (106) to intelligently control the sampling start and stop according to the preset wind speed threshold.

6. A carbon dioxide collection device for atmospheric monitoring according to claim 5, characterized in that, It also includes a locking assembly for locking the air intake square tube (111) in its current position under windy conditions; the locking assembly includes: Fixed guide rail (201) is symmetrically fixed to the air intake square tube (111). The windshield (202) is slidably connected between two fixed guide rails (201) in the horizontal direction; A spring (203) is connected between the windshield frame (202) and each fixed guide rail (201), and is sleeved on the windshield frame (202) to provide a restoring force; An arc-shaped limiting block (205) is fixed to the left end of the windshield frame (202); A retaining ring (204) is fixed to the upper end of the outer shell (102) and to the side near the limiting block (205); And a rubber pad, located inside the limiting block (205) and outside the fixing ring (204), to increase contact friction.

7. A carbon dioxide collection device for atmospheric monitoring according to claim 6, characterized in that, The gravity-triggered automatic debris removal component includes: A dustproof sealing base (305) is provided at the bottom of the outer casing (102) to seal the gap between the fixing bracket (115) and the outer casing (102); The dustproof sealing base (305) has a circular slot that matches the thickness of the side wall of the outer shell (102). Its outer wall is a downward-sloping conical surface and its inner wall is an upward-sloping conical surface. A fixed cover (301) is fixed to the outside of the outer shell (102) and a dustproof sealing base (305) is placed inside it; The telescopic rod (302) is symmetrically arranged on the left and right sides. Its fixed end is fixed to the inner side of the top wall of the fixed cover (301), and its telescopic end is fixed to the dustproof sealing base (305). The first magnet (303) is fixed to the fixing part of the telescopic rod (302); The second magnet (304) is fixed to the telescopic part of the telescopic rod (302) and magnetically attracted to the first magnet (303); The outer shell (102) has four arc-shaped drainage windows circumferentially opened on the side near the fixed cover (301) to connect the outer compartment with the internal space of the fixed cover (301).

8. A carbon dioxide collection device for atmospheric monitoring according to claim 7, characterized in that, An outer layer of impurity storage area is formed between the outer wall of the outer shell (102) and the inner wall of the fixed cover (301), which is used to receive sand and gravel entering through the arc-shaped discharge window and accumulate on the outer wall of the dustproof sealing base (305); an inner layer of impurity storage area is formed between the inner wall of the outer shell (102) and the top conical surface of the fixed bracket (115), which is used to receive the settled fine sand and gravel and slide onto the inner wall of the dustproof sealing base (305).

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