A gas uniformity control device

Abstract

The application relates to a gas uniformity control device, belonging to the technical field of gas uniformity control devices, which comprises an operation box and a supply box, a circulating pipeline and a conveying pipeline are connected between the operation box and the supply box, a mixing chamber is arranged in the supply box, one end of the circulating pipeline is communicated with the mixing chamber, and a fresh air assembly is connected with the mixing chamber; the output end of the mixing chamber is connected with a connecting pipeline, a first electric heater is arranged on the connecting pipeline, the output end of the connecting pipeline is connected with a first mixing cavity, a first disturbance assembly is arranged in the first mixing cavity, a second electric heater is arranged on the conveying pipeline, a second mixing cavity is arranged at the end, away from the first mixing cavity, of the conveying pipeline, and a second disturbance assembly is arranged in the second mixing cavity; a mixed flow cavity is arranged in the operation box, a third disturbance assembly is arranged in the mixed flow cavity, and a flow uniformizing plate and a first filter plate are arranged between the mixed flow cavity and an operation table of the operation box. The application has the effect of providing a temperature-stable and uniform gas for an experimental operation platform.

Description

Technical Field

[0001] This application relates to the field of gas homogenization equipment technology, and in particular to a gas homogenization control device. Background Technology

[0002] In technical fields such as gas detection, environmental simulation, material corrosion testing, precision instrument protection, and chemical experiments, it is typically necessary to provide the test object with a gas environment that is temperature-stable, has a stable flow rate, and a uniform gas distribution. The temperature uniformity, flow rate stability, and spatial distribution uniformity of the gas directly affect the accuracy of test data, the reliability of test results, and the repeatability of product tests, and are key conditions for ensuring the smooth conduct of high-precision experiments.

[0003] To meet these requirements, existing gas mixing devices typically employ flow equalization plates and buffer chamber diffusion structures to improve mixing uniformity. However, in actual use, when gas mixes, diffuses, and flows within the buffer chamber, the chamber structure restricts the formation of dead zones at the corners and edges. Gas flow velocities within these dead zones are extremely low, leading to delayed local gas turnover and insufficient mixing with the mainstream gas. This can cause localized overcooling or overheating, resulting in an uneven overall gas temperature distribution. Consequently, the output gas temperature is difficult to achieve a uniform and stable state across the entire range, severely impacting the stability of the experimental environment and detection accuracy. This fails to meet the requirements for high-precision environmental simulation, precision instrument protection, and standardized corrosion testing. Summary of the Invention

[0004] In order to provide a gas with a stable and uniform temperature for the experimental operation platform, this application provides a gas uniformity control device.

[0005] This application provides a gas uniformity control device. The technical solution adopted is as follows: A gas uniformity control device includes an operation box and an air supply box. A circulation pipe and a delivery pipe are connected between the operation box and the air supply box. A mixing chamber is provided inside the air supply box. One end of the circulation pipe is connected to the mixing chamber. A fresh air assembly is connected to the mixing chamber. The output end of the mixing chamber is connected to a connecting pipe, a first electric heater is provided on the connecting pipe, the output end of the connecting pipe is connected to a first mixing chamber, the first mixing chamber is connected to the conveying pipe, a first disturbance component is provided in the first mixing chamber, a second electric heater is provided on the conveying pipe, a second mixing chamber is provided at the end of the conveying pipe away from the first mixing chamber, and a second disturbance component is provided in the second mixing chamber; The operation box is provided with a mixing chamber, which is connected to the second mixing chamber. A third disturbance component is provided in the mixing chamber. A flow equalization plate and a first filter plate are provided between the mixing chamber and the operation table of the operation box. The first disturbance component, the second disturbance component, and the third disturbance component can all drive the gas at the corners of the cavity to flow faster.

[0006] By adopting the above technical solution, the circulating pipeline returns the gas in the operating box to the air supply box, and the fresh air system continuously replenishes and refreshes it, which reduces gas and gas temperature loss and ensures sufficient gas supply, maintaining the consistency of the experimental environment for a long time. The gas undergoes multi-stage heating and multi-stage mixing to achieve uniform and stable temperature distribution during gas transportation, providing a stable temperature environment for the experiment. Three disturbance components can actively drive the gas to accelerate flow in the corners and edges of the cavity, eliminating gas stagnation and flow dead zones in traditional equipment, allowing all gas in the cavity to participate in circulation and be fully mixed throughout the process, effectively avoiding local overcooling or overheating of the gas and improving the uniformity of gas mixing. At the same time, the two mixing chambers and the mixing chamber realize the mixing and stabilization of the main unit, reducing airflow pulsation and eddies, making the gas flow rate and pressure entering the operating platform of the operating box stable. The flow equalization plate and the first filter plate further rectify and filter the gas, ensuring that the output airflow is uniform and clean. The overall equipment integrates mixing, heating, disturbance, flow equalization and filtration functions into one compact and reasonable structure, which can stably output gas with uniform temperature, concentration and flow rate throughout the entire range, and is suitable for high-precision experimental scenarios.

[0007] Optionally, the fresh air assembly includes an air intake duct and an air pump. A second filter plate is disposed inside the connecting duct, and multiple perforated plates are disposed inside the connecting duct. The perforated plates have different pore diameters and are located between the second filter plate and the mixing chamber.

[0008] By adopting the above technical solutions, the air pump and the air intake pipe work together to achieve a stable and controllable input of fresh air, which, together with the circulating gas, forms a gas supply system to maintain the long-term constant gas within the equipment, avoid gas loss, and ensure the stability of the gas supply in the test environment. The second filter plate can effectively filter out dust, particulate matter, and other impurities in the gas, preventing impurities from entering the heater, disturbance components, and control box. This protects the internal precision structure from wear and blockage, while also ensuring that the gas detection requires clean airflow. The multi-layer orifice plate with varying diameters allows the airflow to pass through orifice plates of different diameters in sequence, performing preliminary mixing and rectification of the fresh air and circulating gas, reducing airflow pulsation and impact, improving airflow uniformity in advance, laying a good foundation for subsequent multi-stage disturbance mixing, and improving the overall mixing effect.

[0009] Optionally, multiple mixing blocks are rotatably connected between the connecting pipe and the first mixing chamber, and between the conveying pipe and the second mixing chamber, and the mixing blocks are fixedly provided with rotating blades facing the air inlet end of the mixing layer.

[0010] By adopting the above technical solution, the incoming airflow directly impacts the rotating blades, causing the mixing block to rotate automatically and forming a continuous swirling turbulent field. Without the need for an additional motor or drive mechanism, it can actively agitate the stagnant gas at the air inlet and corner areas of the cavity, forcibly shear and fully mix the airflow heated by the heater, eliminate dead zones, avoid local gas accumulation and mixing lag, accelerate heat transfer between gases, and enable rapid and uniform heat exchange between hot and cold gases, thereby improving the overall uniformity of gas concentration and temperature. The airflow-driven rotating connection structure is simple and reliable, does not increase energy consumption, has high long-term operational stability, and is easy to maintain.

[0011] Optionally, the first disturbance component includes a chain and at least two rotating sprockets. The rotating sprockets are coaxially fixed with the corresponding mixing blocks. Both the chain and the rotating sprockets are located within the first mixing chamber. The rotating sprockets are meshed with the chain. A plurality of first disturbance plates are fixedly disposed on the chain. The first disturbance plates are perpendicular to the moving direction of the chain.

[0012] By adopting the above technical solution, the rotating sprocket and the mixing block are fixed coaxially. The rotating blades and the mixing block are driven to rotate by the airflow, which synchronously drives the rotating sprocket and the chain to move. This causes the first disturbance plate to move. The first disturbance plate has a large disturbance area, forming a large-area strong shear disturbance surface, which fans the gas in the first mixing chamber to accelerate the flow, forces gas mixing, and improves the uniformity of gas temperature mixing. Multiple first disturbance plates move in the entire mixing chamber, covering the entire area of ​​the first mixing chamber, forming a large-scale gas circulation disturbance path, avoiding gas stagnation in the corners and bends of the mixing chamber. No additional power is required to realize the automatic driving operation of the entire first disturbance component. The structure is simple and highly reliable.

[0013] Optionally, a first temperature sensor is provided at one end of the first mixing chamber near the delivery pipe. When the first temperature sensor detects that the gas temperature is lower than a set value, the first electric heater increases its opening. A second temperature sensor is provided at one end of the second mixing chamber near the mixing chamber. When the second temperature sensor detects that the gas temperature is lower than a preset value, the second electric heater increases its opening.

[0014] By adopting the above technical solution, the first temperature sensor monitors the gas temperature output from the first mixing chamber in real time, and the second temperature sensor monitors the gas temperature output from the second mixing chamber in real time. When the sensor detects that the gas temperature is lower than the set threshold, it can automatically increase the heating opening of the corresponding electric heater, increase the gas heating power, compensate for the temperature drop deviation in real time, and ensure that the gas temperature continuously matches the set standard temperature. The two temperature sensors are close to the gas output end, and the temperature data acquisition is real-time and accurate without monitoring lag. The electric heater has a fast response and adjustment speed, which can quickly correct temperature fluctuations and improve the stability of the equipment's temperature control operation.

[0015] Optionally, the second disturbance component further includes a helical rod, which is rotatably connected in the second mixing chamber. The helical rod is coaxially fixed with the corresponding mixing block, and a plurality of first through holes are provided on the helical part of the helical rod.

[0016] By adopting the above technical solution, the screw rod and the mixing block are fixed coaxially. The rotating blades and the mixing block are driven synchronously by the airflow to rotate the screw rod. It is coaxially self-driven, requiring no additional power. The structure is simple, reliable, and easy to maintain. The spiral part of the screw rod has a dual effect of axial pushing and radial full-range agitation of the gas. It can not only push the gas forward smoothly, but also break the dead zone of gas flow in the corners of the second mixing chamber. The first through hole allows the gas to repeatedly pass through the through hole during the spiral pushing process, realizing airflow cutting, more uniform mixing, increasing the heat exchange frequency between airflows, and ensuring a consistent temperature distribution throughout the entire range. The first through hole can effectively guide the airflow, reduce the spinning resistance, and improve the smoothness of the conveying.

[0017] Optionally, a first arc-shaped baffle is provided on the side of the mixing chamber near the output end of the conveying pipe. The first arc-shaped baffle is bent toward the conveying pipe and has several second through holes.

[0018] By adopting the above technical solution, the first arc-shaped baffle bends toward the output end of the conveying pipe, which can form an arc-shaped guide and flexible buffer for the airflow entering the mixing chamber, avoiding the high-speed airflow from directly impacting the chamber wall and generating eddies, making the airflow delivery more stable. Under the guidance of the arc-shaped baffle, some airflow passes through several second through holes, and some airflow is distributed and diffused toward the inlet area, so that the airflow can reach the side wall and corners of the mixing chamber near the conveying pipe, suppressing the generation of dead airflow in the corners, preventing gas from stagnating and accumulating in the inlet area, turning the concentrated air intake into a full-area diffusion air intake, and improving the uniformity of airflow distribution in the mixing chamber.

[0019] Optionally, a sleeve is provided inside the mixing chamber, the opening of the sleeve is oriented toward the first arc-shaped baffle, and multiple flow equalization films are provided inside the sleeve.

[0020] By adopting the above technical solution, the flow equalization film inside the sleeve sorts and equalizes the airflow, eliminates residual turbulence and velocity fluctuations, and makes the gas distribution in the axial and radial directions of the mixing chamber consistent, thus providing the operating platform of the operating box with an ultra-high uniformity airflow environment.

[0021] Optionally, the disturbance component includes a second arc-shaped baffle and a rotating rod. The second arc-shaped baffle is fixedly disposed at the end of the mixing chamber away from the first arc-shaped baffle. The rotating rod is rotatably connected to the sleeve. A driving impeller is fixedly disposed at one end of the rotating rod, which is located inside the sleeve. A disturbance impeller is fixedly disposed at the other end of the rotating rod, which is close to the second arc-shaped baffle.

[0022] By adopting the above technical solution, the airflow drives the impeller to rotate, ensuring stable and reliable operation. This drives the perturbed impeller to stir the stagnant gas at the end of the mixing chamber and the corners of the chamber wall. The second arc-shaped baffle guides and gathers the airflow at the end. Combined with the rotational shearing of the perturbed impeller, the airflow is mixed and heated evenly at the end of the mixing chamber, further improving the uniformity of the gas throughout the entire process and providing a stable and uniform airflow for subsequent gas output. The rotating rod is directly connected to the sleeve by the sleeve, achieving precise positioning and avoiding scraping of the mixing chamber wall during rotation.

[0023] Optionally, the flow equalization plate is located between the mixing chamber and the first filter plate. The flow equalization plate is provided with a plurality of first receiving slots. The sidewalls of the first receiving slots are provided with a plurality of air outlet channels. The air outlet channels connect the mixing chamber with the space between the flow equalization plate and the first filter plate. The first receiving groove has a second receiving groove, and a support spring is fixedly installed in the second receiving groove. A movable block is slidably connected in the first receiving groove. The movable block is fixedly connected to the support spring. The support spring supports the movable block to block the air outlet channel. When the gas in the mixing chamber is in a positive pressure state, the gas pressure in the mixing chamber presses the movable block, so that the mixing chamber is connected to the air outlet channel.

[0024] By adopting the above technical solution, the moving block is automatically opened by the positive pressure of the gas in the mixing chamber, thereby connecting the gas outlet channel. When the pressure in the chamber is insufficient, the support spring automatically resets and seals, forming an adaptive pressure stabilizing structure. This structure can automatically maintain the pressure in the mixing chamber, avoid sudden changes in airflow pressure, and ensure a continuous and stable output airflow. The moving block only opens when there is positive pressure in the mixing chamber, which can effectively prevent the gas at the downstream end from flowing back into the mixing chamber, avoid excessive pressure in the mixing chamber, improve the stability of system operation, and ensure the safety of gas circulation.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The gas undergoes multi-stage heating and mixing to achieve a uniform and stable temperature distribution during gas delivery. Three disturbance components actively accelerate the flow of gas in the corners and edges of the cavity, eliminating gas stagnation and dead zones, ensuring that all gas in the cavity participates in circulation and is fully mixed throughout the process. This effectively avoids localized overcooling or overheating of the gas and improves the uniformity of gas mixing. The entire device integrates mixing, heating, disturbance, flow equalization, and filtration functions into one compact and reasonable structure, enabling it to stably output gas with uniform temperature, concentration, and flow rate across the entire range, making it suitable for high-precision experimental scenarios.

[0026] 2. The second filter plate removes dust, particulate matter and other impurities from the gas, protecting the internal precision structure from wear and blockage, and ensuring that the gas detection requires clean airflow. The multi-layer variator plate allows the airflow to pass through the orifice plates of different diameters in sequence, performing preliminary mixing and rectification of fresh air and circulating gas, reducing airflow pulsation and impact, and improving airflow uniformity in advance.

[0027] 3. The intake airflow directly impacts the rotating blades, causing the mixing block to rotate automatically, forming a continuous swirling turbulent field. This actively stirs the stagnant gas at the air inlet and corner areas of the cavity, forcibly shears and fully mixes the airflow heated by the heater, eliminates dead zones, accelerates heat transfer between gases, and enables rapid and uniform heat exchange between hot and cold gases, thereby improving the overall uniformity of gas concentration and temperature. The rotating sprocket is fixed coaxially with the mixing block. The rotating blades and mixing block are driven to rotate by the airflow, which can synchronously drive the rotating sprocket and chain to move, thereby driving the first disturbance plate to move, fanning the gas in the first mixing chamber to accelerate the flow, forcing gas mixing, improving the uniformity of gas temperature mixing, and avoiding gas stagnation in the corners and bends of the mixing chamber. The screw rod is fixed coaxially with the mixing block. The intake airflow drives the rotating blades and the mixing block to drive the screw rod to rotate synchronously. The spiral part of the screw rod has a dual effect of axial pushing and radial full-range stirring of the gas, which can not only push the gas forward smoothly, but also break the dead zone of gas flow at the corners in the second mixing chamber. The airflow drives the impeller to rotate, ensuring stable and reliable operation. This causes the perturbed impeller to stir the stagnant gas at the end of the mixing chamber and the corners of the chamber walls. The second arc-shaped baffle guides and gathers the airflow at the end. Combined with the rotational shearing of the perturbed impeller, the airflow is mixed and heated evenly at the end of the mixing chamber, further improving the uniformity of the gas throughout the entire process and providing a stable and uniform airflow for subsequent gas output.

[0028] 4. The first arc-shaped baffle forms an arc-shaped guide and flexible buffer for the airflow entering the mixing chamber, avoiding the direct impact of high-speed airflow on the chamber wall to generate eddies, making the airflow delivery more stable. Under the guidance of the arc-shaped baffle, some airflow passes through several second through holes, and some airflow is distributed and diffused towards the inlet area, suppressing the generation of dead zone airflow at the corners, preventing gas from stagnating and accumulating in the inlet area, and improving the uniformity of airflow distribution in the mixing chamber.

[0029] 5. The moving block is automatically opened by the positive pressure of the gas in the mixing chamber, thereby connecting the gas outlet channel. When the pressure in the chamber is insufficient, the support spring automatically resets and seals, forming an adaptive pressure stabilizing structure. This structure can automatically maintain the pressure in the mixing chamber, avoid sudden changes in airflow pressure, and ensure a continuous and stable output airflow. The moving block only opens when there is positive pressure in the mixing chamber, which can effectively prevent the gas at the downstream end from flowing back into the mixing chamber, avoid excessive pressure in the mixing chamber, improve the stability of system operation, and ensure the safety of gas circulation. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0031] Figure 2 This is a cross-sectional structural diagram illustrating the interior of the air supply box, as shown in the embodiments of this application.

[0032] Figure 3 This is a cross-sectional structural diagram illustrating the first disturbance component in an embodiment of this application.

[0033] Figure 4 This is a cross-sectional structural diagram illustrating the conveying pipeline and the second mixing chamber in an embodiment of this application.

[0034] Figure 5 This is a cross-sectional structural diagram illustrating the second disturbance component in an embodiment of this application.

[0035] Figure 6 This is a cross-sectional structural diagram illustrating the flow equalization plate in an embodiment of this application.

[0036] Figure 7 yes Figure 6 An enlarged schematic diagram of part A in the middle.

[0037] Explanation of reference numerals in the attached drawings: 1. Control box; 11. First filter plate; 12. Mixing chamber; 121. First arc-shaped baffle; 1211. Second through hole; 13. Sleeve; 14. Flow equalization membrane; 2. Air supply box; 21. Mixing chamber; 22. Connecting pipe; 221. Second filter plate; 222. Perforated plate; 23. First electric heater; 24. First mixing chamber; 25. Mixing block; 251. Rotating blade; 26. First temperature sensor; 31. Circulation pipe; 32. Conveying pipe; 321. Second electric heater; 322. Second mixing chamber; 32 3. Second temperature sensor; 4. Fresh air assembly; 41. Air intake duct; 42. Air pump; 5. First disturbance assembly; 51. Chain; 52. Rotating sprocket; 53. First disturbance plate; 531. Third through hole; 6. Second disturbance assembly; 61. Helical rod; 611. First through hole; 7. Third disturbance assembly; 71. Second arc-shaped baffle; 72. Rotating rod; 73. Drive impeller; 74. Disturbance impeller; 8. Flow equalization plate; 81. First receiving slot; 82. Air outlet channel; 83. Second receiving slot; 84. Support spring; 85. Moving block. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0039] This application discloses a gas uniformity control device.

[0040] like Figure 1 The gas uniformity control device includes an air supply box 2 and an operating box 1. The air supply box 2 and the operating box 1 are connected by a circulation pipe 31 and a delivery pipe 32. The circulation pipe 31 and the delivery pipe 32 are located between the air supply box 2 and the operating box 1. The circulation pipe 31 is located below the delivery pipe 32. A fresh air assembly 4 is connected to the air supply box 2. The fresh air assembly 4 is located on the side of the air supply box 2 away from the circulation pipe 31.

[0041] like Figure 1 and Figure 2 The air supply box 2 is equipped with a mixing chamber 21, which is located at the bottom of the air supply box 2 and is connected to the circulation pipe 31. The fresh air assembly 4 includes an air intake pipe 41 and an air pump 42, and the air intake pipe 41 is connected to the mixing chamber 21.

[0042] The output end of the mixing chamber 21 is connected to a connecting pipe 22. The connecting pipe 22 is located above the mixing chamber 21. A three-layer perforated plate 222 and a second filter plate 221 are arranged sequentially inside the connecting pipe 22. The pore size of the three-layer perforated plate 222 gradually decreases from the side closer to the mixing chamber 21 to the side farther away from the mixing chamber 21. The size of the three-layer perforated plate 222 and the size of the second filter plate 221 are adapted to the connecting pipe 22. Multiple first electric heaters 23 are installed inside the connecting pipe 22. The first electric heaters 23 are arranged in an array and are located above the second filter plate 221. Multiple mixing blocks 25 are rotatably connected above the first electric heaters 23. The mixing blocks 25 are arranged in an array and have a common bottom double cone structure. The upper and lower ends of the mixing blocks 25 are rotatably connected to the rod inside the connecting pipe 22. Multiple rotating blades 251 are fixedly installed on the cone structure of the mixing block 25 near the first electric heater 23. The rotating blades 251 and the mixing block 25 are integrally formed.

[0043] like Figure 2 and Figure 3 The output end of the connecting pipe 22 is connected to a first mixing chamber 24, which is located above the connecting pipe 22. A first disturbance component 5 is provided in the first mixing chamber 24. The first disturbance component 5 includes three chains 51 and six rotating sprockets 52. Each chain 51 meshes with two of the rotating sprockets 52. The rotating sprockets 52 are coaxially fixedly connected to the corresponding mixing block 25. The two rotating sprockets 52 meshing with the same chain 51 are coaxially fixedly connected to two mixing blocks 25 at opposite ends of the chain 51. A first disturbance plate 53 is fixedly provided on the chain 51. The first disturbance plate 53 is a rectangular plate structure. The length of the first disturbance plate 53 is the same as the height of the first mixing chamber 24. The plane of the first disturbance plate 53 is perpendicular to the moving direction of the chain 51. Several third through holes 531 are opened on the first disturbance plate 53. The output end of the first mixing chamber 24 is connected to the conveying pipe 32, and a first temperature sensor 26 is provided in the first mixing chamber 24 near the conveying pipe 32.

[0044] like Figure 2 and Figure 4 Multiple second electric heaters 321 are installed inside the conveying pipe 32. The second electric heaters 321 are close to the first mixing chamber 24. The output end of the conveying pipe 32 is connected to the second mixing chamber 322. A mixing block 25 is rotatably connected between the conveying pipe 32 and the second mixing chamber 322. The structure of the mixing block 25 between the conveying pipe 32 and the second mixing chamber 322 is the same as that between the connecting pipe 22 and the first mixing chamber 24. The mixing block 25 has a common-bottom double-conical structure. The left and right ends of the mixing block 25 are rotatably connected to the rod inside the conveying pipe 32. Multiple rotating blades 251 are fixedly installed on the conical structure of the mixing block 25 facing the conveying pipe 32. The rotating blades 251 and the mixing block 25 are integrally formed.

[0045] A second disturbance component 6 is provided in the second mixing chamber 322. The second disturbance component 6 includes a spiral rod 61, which is rotatably connected in the second mixing chamber 322. The length direction of the spiral rod 61 is the same as the gas conveying direction. The rod body of the spiral rod 61 is coaxially fixedly connected to the mixing block 25 between the conveying pipe 32 and the second mixing chamber 322. Several first through holes 611 are opened on the spiral part of the spiral rod 61. The second mixing chamber 322 is connected to the control box 1, and a second temperature sensor 323 is provided at one end of the second mixing chamber 322 near the control box 1.

[0046] like Figure 1 and Figure 5 The operation box 1 is provided with a mixing chamber 12, which is connected to the second mixing chamber 322. The mixing chamber 12 is provided with a first arc-shaped baffle 121, a sleeve 13 and a third disturbance component 7 in sequence from the end closest to the second mixing chamber 322 to the end furthest from the second mixing chamber 322.

[0047] The first arc-shaped baffle 121 is located near the output end of the conveying pipe 32. One end of the first arc-shaped baffle 121 is fixedly connected to the side wall of the mixing chamber 12 located below the conveying pipe 32. The first arc-shaped baffle 121 is bent towards the conveying pipe 32, and several second through holes 1211 are provided on the first arc-shaped baffle 121. The sleeve 13 is installed on the top wall of the mixing chamber 12 through the bottom baffle. The sleeve 13 has a mesh cylindrical structure, and a flow equalization film 14 is provided inside the cylinder. The opening of the sleeve 13 faces the first arc-shaped baffle 121.

[0048] The third disturbance component 7 includes a rotating rod 72, the length direction of which is consistent with the length direction of the mixing chamber 12. The rotating rod 72 is rotatably connected to the sleeve 13. A drive impeller 73 is fixedly provided at one end of the rotating rod 72 near the first arc-shaped baffle 121. The drive impeller 73 is located inside the sleeve 13. Two disturbance impellers 74 are fixedly provided on the part of the rotating rod 72 located outside the sleeve 13. One disturbance impeller 74 is fixed at the end of the rotating rod 72 away from the first arc-shaped baffle 121, and the other disturbance impeller 74 is fixed at the middle position of rotation. The size and structure of the drive impeller 73 and the two disturbance impellers 74 are the same. A second arc-shaped baffle 71 is fixedly installed on the side wall of the mixing chamber 12 away from the first arc-shaped baffle 121. The inner wall of the second arc-shaped baffle 71 is a hemispherical structure, and one of the disturbance impellers 74 located at the end of the rotating rod 72 is located in the hemispherical structure of the second arc-shaped baffle 71.

[0049] like Figure 5 , Figure 6 and Figure 7A flow equalization plate 8 and a first filter plate 11 are provided between the mixing chamber 12 and the operating table of the operating box 1. The flow equalization plate 8 is provided with a number of first receiving slots 81. The first receiving slots 81 are rectangular slot structures. Each first receiving slot 81 is provided with four air outlet channels 82. The air outlet channels 82 are located on the side wall of the first receiving slot 81. The air outlet channels 82 connect the space between the mixing chamber 12 and the flow equalization plate 8 and the second filter plate 221. A movable block 85 is slidably connected inside the first receiving groove 81. The movable block 85 has a cuboid structure and its size is adapted to the size of the inner wall of the first receiving groove 81. When there is no gas pressure in the mixing chamber 12, the movable block 85 can block the gas outlet channel 82. A second receiving groove 83 is provided on the first receiving groove 81. The second receiving groove 83 is located at the bottom of the first receiving groove 81. A support spring 84 is fixedly installed in the second receiving groove 83. One end of the support spring 84 is fixed to the bottom of the groove of the second receiving groove 83, and the other end of the support spring 84 is fixed to the bottom surface of the moving block 85. When the gas pressure in the mixing chamber 12 is large, the gas pressure pushes the moving block 85 to overcome the spring force and press down, so that the gas outlet channel 82 is connected to the mixing chamber 12.

[0050] In other embodiments, the connecting pipe 22 may be provided with two, four, or other numbers of perforated plates 222 and second filter plates 221, and the perforated plates 222 and filter plates may be arranged alternately; the mixing block 25 may be a common-base quadrangular pyramid structure, or the mixing block 25 may be a fan structure; the first disturbance component 5 may also include two rotating sprockets 52 and a chain 51, one of which can be driven to rotate by a motor; the first disturbance component 5 may also include three or four rotating sprockets 52 and a chain 51, with the chain 51 meshing with multiple rotating sprockets 52. Two rotating parts may be arranged in parallel on the helical rod 61 of the second disturbance component 6, and the helical rod 61 may also be directly driven to rotate by a motor. The first arc-shaped baffle 121 may be a hemispherical structure, and the first arc-shaped baffle 121 may directly cover the air outlet of the second mixing chamber 322; the rotating rod 72 may also be directly driven to rotate by a motor, and the lower mounting plate may be rotatably connected to the second arc-shaped baffle 71. The first receiving groove 81 can be a cylinder or other structure, and the moving block 85 can also be a cylinder or other structure that matches the first receiving groove 81. Two, eight or other numbers of air outlet channels 82 can be opened on the first receiving groove 81. A solenoid valve can also be installed in the second receiving groove 83, and the opening and closing of the air outlet channel 82 and the mixing chamber 12 can be realized by switching the solenoid valve.

[0051] The implementation principle of this application embodiment is as follows: the circulation pipe 31 sends the gas in the operation box 1 back to the air supply box 2, and the fresh air system continuously replenishes and refreshes it, which reduces gas and gas temperature loss and ensures sufficient gas supply, so as to maintain the consistency of the experimental environment for a long time; the gas undergoes multi-stage heating and multi-stage mixing to achieve uniform and stable temperature distribution during gas transportation, providing a stable temperature environment for the experiment; the three disturbance components can actively drive the gas to accelerate the flow in the corners and edges of the cavity, eliminating gas stagnation and flow dead zones in traditional equipment, so that all gas in the cavity participates in the flow throughout the process. With circulation and thorough mixing, the gas is effectively prevented from being locally overcooled or overheated, improving the uniformity of gas mixing. At the same time, the two mixing chambers and the mixing chamber 12 realize the mixing and stabilization of the main unit, reducing airflow pulsation and eddies, so that the gas flow rate and pressure entering the operating platform of the operating box 1 are stable. The flow equalization plate 8 and the first filter plate 11 further rectify and filter, ensuring that the output airflow is uniform and clean. The whole device integrates mixing, heating, disturbance, flow equalization and filtration functions into one, with a compact and reasonable structure, and can stably output gas with uniform temperature, concentration and flow rate throughout the entire range, which is suitable for high-precision experimental scenarios.

[0052] By directly impacting the rotating blades 251 with the incoming airflow, the mixing block 25 is driven to rotate automatically, forming a continuous swirling turbulent field. This actively stirs the stagnant gas at the air inlet and corner areas of the cavity, forcibly shears and fully mixes the airflow heated by the heater, eliminates dead zones, accelerates heat transfer between gases, and enables rapid and uniform heat exchange between hot and cold gases, thereby improving the uniformity of gas concentration and temperature across the entire range. The rotating sprocket 52 is fixed coaxially with the mixing block 25. The rotating blade 251 and the mixing block 25 are driven to rotate by the airflow, which can synchronously drive the rotating sprocket 52 and the chain 51 to rotate, thereby driving the first disturbance plate 53 to move, fanning the gas in the first mixing chamber 24 to accelerate the flow, forcing gas mixing, improving the uniformity of gas temperature mixing, and avoiding gas stagnation in the corners and bends of the mixing chamber. The screw rod 61 is fixed coaxially with the mixing block 25. The rotating blades 251 and the mixing block 25 are driven by the airflow to rotate the screw rod 61 synchronously. The spiral part of the screw rod 61 has a dual effect of axial pushing and radial full-range stirring of the gas. It can not only push the gas forward smoothly, but also break the dead zone of gas flow in the corner of the second mixing chamber 322. The airflow drives the impeller 73 to rotate, ensuring stable and reliable operation. This drives the disturbance impeller 74 to agitate the stagnant gas at the end and corners of the mixing chamber 12. The second arc-shaped baffle 71 guides and gathers the airflow at the end. Combined with the rotational shearing of the disturbance impeller 74, the airflow is mixed and heated evenly at the end of the mixing chamber 12, further improving the uniformity of the gas throughout the entire process and providing a stable and uniform airflow for subsequent gas output.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas uniformity control device, characterized in that: It includes an operation box (1) and an air supply box (2), with a circulation pipe (31) and a delivery pipe (32) connected between the operation box (1) and the air supply box (2). A mixing chamber (21) is provided inside the air supply box (2), and one end of the circulation pipe (31) is connected to the mixing chamber (21). A fresh air assembly (4) is connected to the mixing chamber (21). The output end of the mixing chamber (21) is connected to a connecting pipe (22), a first electric heater (23) is provided on the connecting pipe (22), the output end of the connecting pipe (22) is connected to a first mixing chamber (24), the first mixing chamber (24) is connected to the conveying pipe (32), a first disturbance component (5) is provided in the first mixing chamber (24), a second electric heater (321) is provided on the conveying pipe (32), a second mixing chamber (322) is provided at the end of the conveying pipe (32) away from the first mixing chamber (24), and a second disturbance component (6) is provided in the second mixing chamber (322); The operation box (1) is provided with a mixing chamber (12), which is connected to the second mixing chamber (322). A third disturbance component (7) is provided in the mixing chamber (12). A flow equalization plate (8) and a first filter plate (11) are provided between the mixing chamber (12) and the operation table of the operation box (1). The first disturbance component (5), the second disturbance component (6) and the third disturbance component (7) can all drive the gas at the corners of the cavity to flow faster.

2. The gas uniformity control device according to claim 1, characterized in that: The fresh air assembly (4) includes an air intake pipe (41) and an air pump (42). A second filter plate (221) is provided in the connecting pipe (22). A multi-layer perforated plate (222) is provided in the connecting pipe (22). The perforated plates (222) have different pore diameters. The perforated plates (222) are located between the second filter plate (221) and the mixing chamber (21).

3. The gas uniformity control device according to claim 1, characterized in that: Multiple mixing blocks (25) are rotatably connected between the connecting pipe (22) and the first mixing chamber (24), and between the conveying pipe (32) and the second mixing chamber (322). Each mixing block (25) has a rotating blade (251) fixedly installed at the air inlet end facing the mixing layer.

4. The gas uniformity control device according to claim 3, characterized in that: The first disturbance component (5) includes a chain (51) and at least two rotating sprockets (52). The rotating sprockets (52) are coaxially fixed with the corresponding mixing block (25). The chain (51) and the rotating sprockets (52) are both located in the first mixing chamber (24). The rotating sprockets (52) are meshed with the chain (51). A plurality of first disturbance plates (53) are fixedly provided on the chain (51). The first disturbance plates (53) are perpendicular to the moving direction of the chain (51).

5. The gas uniformity control device according to claim 1, characterized in that: A first temperature sensor (26) is provided at one end of the first mixing chamber (24) near the conveying pipe (32). When the first temperature sensor (26) detects that the gas temperature is lower than the set value, the first electric heater (23) increases the opening. A second temperature sensor (323) is provided at one end of the second mixing chamber (322) near the mixing chamber (12). When the second temperature sensor (323) detects that the gas temperature is lower than a preset value, the second electric heater (321) increases its opening.

6. The gas uniformity control device according to claim 3, characterized in that: The second disturbance component (6) further includes a helical rod (61), which is rotatably connected in the second mixing chamber (322). The helical rod (61) is coaxially fixed with the corresponding mixing block (25), and a plurality of first through holes (611) are provided on the helical part of the helical rod (61).

7. The gas uniformity control device according to claim 1, characterized in that: The mixing chamber (12) is provided with a first arc-shaped baffle (121) on the side near the output end of the conveying pipe (32). The first arc-shaped baffle (121) is bent toward the conveying pipe (32), and a plurality of second through holes (1211) are provided on the first arc-shaped baffle (121).

8. The gas uniformity control device according to claim 7, characterized in that: A sleeve (13) is provided inside the mixing chamber (12), the opening of the sleeve (13) is facing the first arc-shaped baffle (121), and a plurality of flow equalization films (14) are provided inside the sleeve (13).

9. The gas uniformity control device according to claim 8, characterized in that: The third disturbance component (7) includes a second arc-shaped baffle (71) and a rotating rod (72). The second arc-shaped baffle (71) is fixedly disposed at one end of the mixing chamber (12) away from the first arc-shaped baffle (121). The rotating rod (72) is rotatably connected to the sleeve (13). A driving impeller (73) is fixedly disposed at one end of the rotating rod (72) and is located inside the sleeve (13). A disturbance impeller (74) is fixedly disposed at the other end of the rotating rod (72) and is close to the second arc-shaped baffle (71).

10. The gas uniformity control device according to claim 1, characterized in that: The flow equalization plate (8) is located between the mixing chamber (12) and the first filter plate (11). The flow equalization plate (8) is provided with a plurality of first receiving slots (81). The sidewalls of the first receiving slots (81) are provided with a plurality of air outlet channels (82). The air outlet channels (82) connect the space between the mixing chamber (12), the flow equalization plate (8), and the first filter plate (11). A second receiving groove (83) is provided in the first receiving groove (81). A support spring (84) is fixedly provided in the second receiving groove (83). A moving block (85) is slidably connected in the first receiving groove (81). The moving block (85) is fixedly connected to the support spring (84). The support spring (84) supports the moving block (85) to block the air outlet channel (82). When the gas in the mixing chamber (12) is in a positive pressure state, the gas pressure in the mixing chamber (12) presses the moving block (85) to make the mixing chamber (12) connect with the air outlet channel (82).

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