A high-temperature test chamber with controllable oxygen concentration

Abstract

This invention discloses a high-temperature test chamber with controllable oxygen concentration. The chamber comprises a test chamber and an external gas supply system. The test chamber includes an outer chamber, an inner chamber, and a lid. The inner chamber is located inside the outer chamber, and the lid seals both the outer and inner chambers. The outer walls and bottom of the inner chamber are fixedly connected to the outer chamber via multiple evenly distributed connecting blocks, forming an insulated cavity between the two chambers. A pressure balancing mechanism is installed inside the inner chamber. This test chamber offers high flexibility and, in practical operation, can effectively detect changes in oxygen concentration and temperature. The inner and outer chamber design effectively improves the insulation effect of the test chamber, reducing heat loss. Furthermore, the pressure balancing mechanism enhances the safety of the test chamber during actual use.

Description

Technical Field

[0001] This invention relates to a test chamber, specifically a high-temperature test chamber with controllable oxygen concentration. Background Technology

[0002] A high-temperature test chamber with controllable oxygen concentration is a device used to simulate changes in oxygen concentration in materials under high-temperature environments. In many industrial fields, changes in oxygen concentration under high-temperature conditions have a significant impact on the performance and stability of materials. Therefore, researchers and engineers need a controllable experimental device to simulate this environment for relevant research and testing.

[0003] Traditional high-temperature test chambers typically only provide a high-temperature environment but cannot control oxygen concentration. However, variations in oxygen concentration are crucial for the performance evaluation of many materials and equipment. For example, in the aerospace field, material corrosion and oxidation reactions under high-temperature, high-oxygen environments can severely impact aircraft safety performance. Therefore, a device capable of simulating high-temperature environments with varying oxygen concentrations is needed.

[0004] The working principle of the oxygen concentration-controlled high-temperature test chamber is achieved by controlling the gas flow rate and oxygen concentration entering the chamber. The chamber has a specially designed gas distribution system that mixes oxygen with other gases and distributes it evenly within the chamber. By adjusting the gas flow rate and oxygen concentration, high-temperature environments with varying oxygen concentrations can be achieved.

[0005] Oxygen concentration-controlled high-temperature test chambers are typically equipped with advanced control systems that can precisely adjust oxygen concentration and temperature. Users can set the desired oxygen concentration and temperature as needed and monitor changes in oxygen concentration and temperature during the experiment. This equipment can also be integrated with other testing equipment and data acquisition systems for more comprehensive testing and data analysis.

[0006] Oxygen-controlled high-temperature test chambers have wide applications in aerospace, automotive, electronics, and chemical industries. They can be used for evaluating the oxidation resistance of materials, testing corrosion performance, and testing the high-temperature stability of electronic components. Furthermore, this equipment can be used to study the effects of high-temperature, high-oxygen environments on organisms, such as investigating the physiological responses and tolerance of the human body at high temperatures. In short, oxygen-controlled high-temperature test chambers are extremely useful experimental equipment that can simulate changes in oxygen concentration under high-temperature conditions for the performance evaluation and research of materials and equipment. Their emergence fills the gap in oxygen concentration control within traditional high-temperature test chambers, providing a powerful tool for research and applications in related fields. Summary of the Invention

[0007] In view of the problems existing in the prior art, the purpose of this invention is to provide a high-temperature test chamber with controllable oxygen concentration to solve the problems encountered in practical use.

[0008] The purpose of this invention is to provide a high-temperature test chamber with controllable oxygen concentration to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A high-temperature test chamber with controllable oxygen concentration includes a test chamber and a gas supply system located outside the test chamber. The test chamber includes an outer chamber, an inner chamber, and a lid, wherein the inner chamber is located inside the outer chamber, and the lid simultaneously covers and seals both the outer and inner chambers. The lid includes an outer lid and an inner lid, wherein the top four corners of the inner lid are fixedly connected to the outer lid via connecting posts, and the distance between the bottom surface of the outer lid and the bottom surface of the inner lid is the same as the distance between the top surface of the outer chamber and the top surface of the inner chamber, thereby achieving the function of simultaneously sealing both the outer and inner chambers. Multiple evenly distributed connecting blocks are fixedly connected to the four outer walls and bottom surface of the inner chamber, and the inner chamber is connected to the outer chamber via these connecting blocks. The inner and outer chambers are fixedly connected, forming an insulated cavity. This cavity helps to keep the test chamber warm, reducing heat loss during high-temperature testing. The inner chamber is equipped with a pressure balancing mechanism to prevent safety hazards caused by excessive pressure during continuous gas injection. The pressure balancing mechanism includes a connecting rod, a lower plug, and an upper plug. The lower plug is fixed to the bottom of the connecting rod, and the upper plug is fixed to the top of the connecting rod. The inner chamber cover has an upper pressure relief hole in the middle, the outer chamber has a lower pressure relief hole in the middle of the bottom, and the inner chamber has a through hole in the middle of the bottom for the connecting rod to pass through.

[0011] In practical use, the lower plug seals the lower pressure relief hole, and the upper plug seals the upper pressure relief hole. As the oxygen concentration is adjusted, gas continuously enters the inner chamber, increasing the pressure inside. This raises the pressure balancing mechanism, allowing the gas in the inner chamber to enter the insulated cavity formed between the inner and outer chambers through the upper pressure relief hole. Simultaneously, excess gas is discharged through the lower pressure relief hole, thereby improving the insulation effect of the insulated cavity on the inner chamber, reducing heat loss, and effectively enhancing the safety of the test chamber.

[0012] Preferably, the upper and lower plugs have the same structure. The lower plug includes a limiting ring, an arc-shaped plate, and a sealing plate. Multiple evenly distributed arc-shaped plates are fixedly connected to the bottom surface of the sealing plate, and the bottom ends of the arc-shaped plates are all fixedly connected to the limiting ring. The outer walls of the arc-shaped plates are arc-shaped, and the outer walls of all the arc-shaped plates form an arc shape with the same inner diameter as the lower pressure relief hole. This can improve the stability of the air pressure balancing mechanism during the lifting process. The outer diameter of the limiting ring and the diameter of the sealing plate are both larger than the inner diameter of the lower pressure relief hole. This design can ensure that the air pressure balancing mechanism is confined in the inner box and prevent the air pressure balancing mechanism from slipping.

[0013] Preferably, a handle is fixedly connected to the top surface of the outer casing cover.

[0014] Preferably, a sealing strip is fixedly connected to the bottom surface of the inner box cover, and the outer wall shape of the sealing strip is the same as the inner wall shape of the inner box. The sealing strip improves the sealing performance of the box cover to the inner box.

[0015] Preferably, both ends of the outer walls on both sides of the outer box are fixedly connected to a fixing seat. The fixing seat is rotatably connected to the bottom end of the rotating shaft. The top end of the rotating shaft is fixedly connected to one end of the waist-shaped rotating plate. The bottom surface of the rotating plate is flush with the top surface of the outer box cover. In actual use, the box cover is fastened to the top of the outer box by the rotating plate. When it is necessary to remove the box cover, the rotating plate can be opened. The operation is simple and convenient.

[0016] Preferably, the inner box has an air inlet and an air outlet at both ends on one side, and a uniform air distribution mechanism is rotatably connected to the middle of the inner box. The uniform air distribution mechanism is coaxially arranged with the air pressure balancing mechanism. A vertically arranged baffle plate is fixedly connected to the inner wall of the inner box located on the side of the air inlet and the air outlet. The baffle plate is located in the middle of the air inlet and the air outlet, separating the air inlet and the air outlet. When the airflow enters the inner box from the air inlet, it will form an air duct in the inner box under the action of the uniform air distribution mechanism, thereby making the airflow in the inner box more uniform and the oxygen detection accuracy higher. Temperature sensors and oxygen sensors are fixedly connected to the inner walls of the inner box adjacent to the side wall where the baffle plate is located. With this design, the two parts of the air duct can be detected at the same time. Not only can the uniformity of oxygen concentration be detected, but the midpoint value of the two sensors can also be taken during detection, which can further improve the detection accuracy. A heating plate is fixedly connected to the bottom of the inner box for high-temperature heating.

[0017] Preferably, the air distribution mechanism includes a lower connecting ring, fan blades, and an upper connecting ring. The lower connecting ring is rotatably connected to the bottom surface of the inner box, and the top surface of the lower connecting ring is fixedly connected to the bottom ends of multiple evenly distributed fan blades. The top ends of the fan blades are all fixedly connected to the upper connecting ring, and the direction of the fan blades is parallel to the radial direction of the lower connecting ring. In this way, in the air duct, the airflow can blow from the air inlet to the fan blades on one side of the air distribution mechanism, thereby driving the entire air distribution mechanism to rotate, achieving a stirring effect, and thus making the oxygen more evenly distributed in the airflow.

[0018] Preferably, the gas supply system includes a circulation pipe and an exhaust fan, wherein the output end of the exhaust fan is fixedly connected to the air inlet on the inner box, the input end of the exhaust fan is fixedly connected to one end of the circulation pipe, the other end of the circulation pipe is fixedly connected to the air outlet of the inner box, a three-way pipe is fixedly connected to the middle of the circulation pipe, the middle port of the three-way pipe is fixedly connected to one end of the connecting pipe, the other end of the connecting pipe is fixedly connected to one side port of the three-way valve, the other side port of the three-way valve is fixedly connected to the gas outlet of the oxygen tank, the middle port of the three-way valve is connected to an external gas supply fan, and a valve is fixedly connected to the connecting pipe.

[0019] In practical use, if it is necessary to increase the oxygen concentration in the test chamber, the three-way valve is switched to the oxygen cylinder, and oxygen is injected into the test chamber from the oxygen cylinder. If it is necessary to decrease the oxygen concentration, the gas supply source connected to the middle port of the three-way valve is changed according to the actual needs. If the oxygen concentration to be reduced is not lower than the oxygen concentration in the air, it can be directly connected to the external air, which can save resources. If the oxygen concentration to be reduced is lower than the oxygen concentration in the air, an external inert gas supply source can be used.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This test chamber is highly flexible in use. In actual work, it can not only effectively detect changes in oxygen concentration and temperature, but also improve the insulation effect of the test chamber and reduce heat loss through the design of the inner and outer chambers. Furthermore, the air pressure balance mechanism effectively improves the safety of this test chamber during actual use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a high-temperature test chamber with controllable oxygen concentration.

[0023] Figure 2 This is a schematic diagram of the gas supply system in a high-temperature test chamber with controllable oxygen concentration.

[0024] Figure 3 This is a schematic diagram of the structure of the outer chamber and outer cover of a high-temperature test chamber with controllable oxygen concentration.

[0025] Figure 4 This is an exploded view of the outer chamber of a high-temperature test chamber with controllable oxygen concentration.

[0026] Figure 5 This is a schematic diagram of the structure of the outer cover of a high-temperature test chamber with controllable oxygen concentration. Figure 1 .

[0027] Figure 6 This is a schematic diagram of the structure of the outer cover of a high-temperature test chamber with controllable oxygen concentration. Figure 2 .

[0028] Figure 7 This is a schematic diagram of the internal structure of the outer chamber of a high-temperature test chamber with controllable oxygen concentration.

[0029] Figure 8 This is a schematic diagram of the air pressure balance mechanism in a high-temperature test chamber with controllable oxygen concentration.

[0030] Figure 9 This is a schematic diagram of the lower plug in the air pressure balancing mechanism.

[0031] Figure 10 This is a schematic diagram of the inner chamber of a high-temperature test chamber with controllable oxygen concentration.

[0032] Figure 11 This is a schematic diagram of the air distribution mechanism in a high-temperature test chamber with controllable oxygen concentration.

[0033] As shown in the figure: 1. Gas supply system; 2. Outer casing; 3. Outer casing cover; 4. Oxygen cylinder; 5. Three-way valve; 6. Connecting pipe; 7. T-pipe; 8. Circulation pipe; 9. Exhaust fan; 10. Fixed base; 11. Rotating shaft; 12. Rotating plate; 13. Inner casing; 14. Air pressure balancing mechanism; 15. Inner casing cover; 16. Sealing strip; 17. Connecting column; 18. Handle; 19. Upper pressure relief hole; 20. Lower pressure relief hole; 21. Connecting rod; 22. Lower plug; 23. Upper plug; 24. Limiting ring; 25. Arc plate; 26. Sealing plate; 27. Air baffle plate; 28. Through hole; 29. ​​Connecting block; 30. Heating plate; 31. Air distribution mechanism; 32. Temperature sensor; 33. Oxygen sensor; 34. Lower connecting ring; 35. Fan blade; 36. Upper connecting ring. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1 , Figure 4 , Figure 5 and Figure 6In this embodiment of the invention, a high-temperature test chamber with controllable oxygen concentration includes a test chamber and a gas supply system disposed outside the test chamber. The test chamber includes an outer chamber 2, an inner chamber 13, and a lid. The inner chamber 13 is disposed inside the outer chamber 2, and the lid simultaneously covers and seals both the outer chamber 2 and the inner chamber 13. The lid includes an outer cover 3 and an inner cover 15. The four corners of the top surface of the inner cover 15 are fixedly connected to the outer cover 3 via connecting posts 17. The distance between the bottom surface of the outer cover 3 and the bottom surface of the inner cover 15 is the same as the distance between the top surface of the outer chamber 2 and the top surface of the inner chamber 13, thereby achieving the function of simultaneously covering and sealing both the outer chamber 2 and the inner chamber 13. Multiple evenly distributed connecting blocks 29 are fixedly connected to the four outer walls and the bottom surface of the inner chamber 13. The inner chamber 13 is connected to the outer chamber 2 through the connecting blocks 29. The outer box 2 is fixedly connected, forming an insulated cavity between the outer box 2 and the inner box 13. The insulated cavity can keep the test chamber warm, thereby reducing heat loss during high-temperature testing. The inner box 13 is equipped with a pressure balancing mechanism 14. The pressure balancing mechanism 14 avoids safety hazards caused by excessive air pressure in the test chamber during the continuous injection of gas. The pressure balancing mechanism 14 includes a connecting rod 21, a lower plug 22, and an upper plug 23. The lower plug 22 is fixed to the bottom end of the connecting rod 21, and the upper plug 23 is fixedly connected to the top end of the connecting rod 21. The inner box cover 15 has an upper pressure relief hole 19 in the middle, the outer box 2 has a lower pressure relief hole 20 in the middle of the bottom, and the inner box 13 has a through hole 28 in the middle of the bottom for the connecting rod 21 to pass through.

[0036] It should be noted that in actual use, the lower plug 22 seals the lower pressure relief hole 20, and the upper plug 23 seals the upper pressure relief hole 19. As the oxygen concentration is adjusted, gas continuously enters the inner chamber 13, increasing the gas pressure in the inner chamber 13. This lifts the pressure balancing mechanism 14, allowing the gas in the inner chamber 13 to enter the insulation cavity formed between the inner chamber 13 and the outer chamber 2 through the upper pressure relief hole 19. Simultaneously, excess gas is discharged through the lower pressure relief hole 20, thereby improving the insulation effect of the insulation cavity on the inner chamber 13, reducing heat loss, and effectively improving the safety of the test chamber.

[0037] Please see Figure 6 , Figure 7 and Figure 8The upper plug 23 and the lower plug 22 have the same structure. The lower plug 22 includes a limiting ring 24, an arc plate 25 and a sealing plate 26. The bottom surface of the sealing plate 26 is fixedly connected with multiple evenly distributed arc plates 25, and the bottom ends of the arc plates 25 are all fixedly connected to the limiting ring 24. The outer wall of the arc plate 25 is arc-shaped and the outer wall of all the arc plates 25 forms an arc shape with the same inner diameter as the lower pressure relief hole 20. This can improve the stability of the air pressure balancing mechanism 14 during the lifting process. The outer diameter of the limiting ring 24 and the diameter of the sealing plate 26 are both larger than the inner diameter of the lower pressure relief hole 20. This design can ensure that the air pressure balancing mechanism 14 is confined in the inner box 2 and prevent the air pressure balancing mechanism 14 from slipping.

[0038] Please see Figure 5 A handle 18 is fixedly connected to the top surface of the outer box cover 3.

[0039] Please see Figure 5 and Figure 6 A sealing strip 16 is fixedly connected to the bottom surface of the inner box cover 15, and the outer wall shape of the sealing strip 16 is the same as the inner wall shape of the inner box 13. The sealing performance of the box cover to the inner box 13 is improved by setting the sealing strip 16.

[0040] Please see Figure 3 Both ends of the outer walls on both sides of the outer box 2 are fixedly connected to the fixing seats 10. The fixing seats 10 are rotatably connected to the bottom end of the rotating shaft 11. The top end of the rotating shaft 11 is fixedly connected to one end of the waist-shaped rotating plate 12. The bottom surface of the rotating plate 12 is flush with the top surface of the outer box cover 3. In actual use, the box cover is fastened to the top of the outer box 2 by the rotating plate 12. When it is necessary to remove the box cover, the rotating plate 12 can be opened. The operation is simple and convenient.

[0041] Please see Figure 10 The inner box 13 has an air inlet and an air outlet at both ends on one side, and a uniform air distribution mechanism 31 is rotatably connected to the middle of the inner box 13. The uniform air distribution mechanism 31 is coaxially arranged with the air pressure balancing mechanism 14. A vertically arranged baffle plate 27 is fixedly connected to the inner wall of the inner box 13 on the side of the air inlet and the air outlet. The baffle plate 27 is located in the middle of the air inlet and the air outlet, separating the air inlet and the air outlet. When the airflow enters the inner box 13 from the air inlet, it will form an air duct in the inner box 13 under the action of the uniform air distribution mechanism 31. This makes the airflow in the inner chamber 13 more uniform and the oxygen detection more accurate. Temperature sensors 32 and oxygen sensors 33 are fixedly connected to the inner walls of the inner chamber 13 adjacent to the side wall where the baffle plate 27 is located. With this design, two parts of the air duct can be detected at the same time. Not only can the uniformity of oxygen concentration be detected, but the midpoint value of the two sensors can also be taken during the detection to further improve the detection accuracy. A heating plate 30 is fixedly connected to the bottom surface of the inner chamber 13 for high-temperature heating.

[0042] Please see Figure 11 The air distribution mechanism 31 includes a lower connecting ring 34, fan blades 35, and an upper connecting ring 36. The lower connecting ring 34 is rotatably connected to the bottom surface inside the inner box 13. The top surface of the lower connecting ring 34 is fixedly connected to the bottom end of multiple evenly distributed fan blades 35. The top ends of the fan blades 35 are all fixedly connected to the upper connecting ring 36. The direction of the fan blades 35 is parallel to the radial direction of the lower connecting ring 34. In this way, in the air duct, the airflow can blow from the air inlet to the fan blades 35 on one side of the air distribution mechanism 31, thereby driving the entire air distribution mechanism 31 to rotate, achieving a stirring effect, and thus making the oxygen more evenly distributed in the airflow.

[0043] Please see Figure 2 The gas supply system includes a circulation pipe 8 and an exhaust fan 9. The output end of the exhaust fan 9 is fixedly connected to the air inlet on the inner box 13, the input end of the exhaust fan 9 is fixedly connected to one end of the circulation pipe 8, the other end of the circulation pipe 8 is fixedly connected to the air outlet of the inner box 13, a three-way pipe 7 is fixedly connected to the middle of the circulation pipe 8, the middle port of the three-way pipe 7 is fixedly connected to one end of the connecting pipe 6, the other end of the connecting pipe 6 is fixedly connected to one side port of the three-way valve 5, the other side port of the three-way valve 5 is fixedly connected to the gas outlet of the oxygen tank 4, the middle port of the three-way valve 5 is connected to an external gas supply fan (not shown in the figure), and a valve is fixedly connected to the connecting pipe 6.

[0044] It should be noted that in actual use, if it is necessary to increase the oxygen concentration in the test chamber, the three-way valve 5 should be switched to the oxygen tank 4, and oxygen should be injected into the test chamber from the oxygen tank 4. If it is necessary to decrease the oxygen concentration, the gas supply source connected to the middle port of the three-way valve 5 should be changed according to actual needs. If the oxygen concentration to be reduced is not lower than the oxygen concentration in the air, it can be directly connected to the external air, which can save resources. If the oxygen concentration to be reduced is lower than the oxygen concentration in the air, an external inert gas supply source can be used.

[0045] In summary, this test chamber is highly flexible in use. In actual operation, it can not only effectively detect changes in oxygen concentration and temperature, but also improve the insulation effect of the test chamber and reduce heat loss through the design of the inner and outer chambers. Furthermore, the air pressure balance mechanism 14 effectively improves the safety of this test chamber during actual use.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Furthermore, the contents not described in detail in this specification are all prior art known to those skilled in the art.

Claims

1. A high-temperature test chamber with controllable oxygen concentration, comprising a test chamber and a gas supply system disposed outside the test chamber, characterized in that, The test chamber includes an outer box (2), an inner box (13), and a lid. The inner box (13) is located inside the outer box (2), and the lid covers and seals both the outer box (2) and the inner box (13). The lid includes an outer lid (3) and an inner lid (15). The top four corners of the inner lid (15) are fixedly connected to the outer lid (3) by connecting posts (17). The distance between the bottom surface of the outer lid (3) and the bottom surface of the inner lid (15) is the same as the distance between the top surface of the outer box (2) and the top surface of the inner box (13). Multiple evenly distributed connecting blocks (29) are fixedly connected to the outer walls and bottom surface of the inner box (13). The inner box (13) is connected by... The connecting block (29) is fixedly connected to the outer box (2), and forms an insulated cavity between the outer box (2) and the inner box (13). The inner box (13) is equipped with an air pressure balancing mechanism (14). The air pressure balancing mechanism (14) includes a connecting rod (21), a lower plug (22) and an upper plug (23). The lower plug (22) is fixed to the bottom end of the connecting rod (21), and the upper plug (23) is fixedly connected to the top end of the connecting rod (21). The inner box cover (15) has an upper pressure relief hole (19) in the middle, the outer box (2) has a lower pressure relief hole (20) in the middle of the bottom, and the inner box (13) has a through hole (28) in the middle of the bottom for the connecting rod (21) to pass through.

2. The oxygen concentration controllable high-temperature test chamber according to claim 1, characterized in that, The upper plug (23) and the lower plug (22) have the same structure. The lower plug (22) includes a limiting ring (24), an arc plate (25) and a sealing plate (26). The bottom surface of the sealing plate (26) is fixedly connected with multiple evenly distributed arc plates (25), and the bottom ends of the arc plates (25) are all fixedly connected to the limiting ring (24). The outer wall of the arc plate (25) is arc-shaped and the outer wall of all the arc plates (25) forms an arc shape with the same inner diameter as the lower pressure relief hole (20). The outer diameter of the limiting ring (24) and the diameter of the sealing plate (26) are both larger than the inner diameter of the lower pressure relief hole (20).

3. The oxygen concentration controllable high-temperature test chamber according to claim 1, characterized in that, A handle (18) is fixedly connected to the top surface of the outer cover (3).

4. The oxygen concentration controllable high-temperature test chamber according to claim 1, characterized in that, A sealing strip (16) is fixedly connected to the bottom surface of the inner box cover (15), and the outer wall shape of the sealing strip (16) is the same as the inner wall shape of the inner box (13).

5. The oxygen concentration controllable high-temperature test chamber according to claim 1, characterized in that, Both ends of the outer walls on both sides of the outer box (2) are fixedly connected to a fixing seat (10). The fixing seat (10) is rotatably connected to the bottom end of the rotating shaft (11). The top end of the rotating shaft (11) is fixedly connected to one end of the waist-shaped rotating plate (12), and the bottom surface of the rotating plate (12) is flush with the top surface of the outer box cover (3).

6. The oxygen concentration controllable high-temperature test chamber according to claim 1, characterized in that, The inner box (13) has an air inlet and an air outlet at both ends on one side, and a wind equalization mechanism (31) is rotatably connected to the middle of the inner box (13). The wind equalization mechanism (31) is coaxially arranged with the air pressure balancing mechanism (14). A vertically arranged wind baffle (27) is fixedly connected to the inner wall of the inner box (13) on one side of the air inlet and the air outlet. The wind baffle (27) is located in the middle of the air inlet and the air outlet, separating the air inlet and the air outlet. A temperature sensor (32) and an oxygen sensor (33) are fixedly connected to the inner walls of the inner box (13) on both sides adjacent to the side wall where the wind baffle (27) is located. A heating plate (30) is fixedly connected to the bottom surface of the inner box (13).

7. The oxygen concentration controllable high-temperature test chamber according to claim 6, characterized in that, The wind equalization mechanism (31) includes a lower connecting ring (34), a fan blade (35) and an upper connecting ring (36). The lower connecting ring (34) is rotatably connected to the bottom surface inside the inner box (13). The top surface of the lower connecting ring (34) is fixedly connected to the bottom end of a plurality of evenly distributed fan blades (35). The top ends of the fan blades (35) are all fixedly connected to the upper connecting ring (36). The direction of the fan blades (35) is parallel to the radial direction of the lower connecting ring (34).

8. The oxygen concentration controllable high-temperature test chamber according to claim 1, characterized in that, The gas supply system includes a circulation pipe (8) and an exhaust fan (9). The output end of the exhaust fan (9) is fixedly connected to the air inlet on the inner box (13). The input end of the exhaust fan (9) is fixedly connected to one end of the circulation pipe (8). The other end of the circulation pipe (8) is fixedly connected to the air outlet of the inner box (13). A three-way pipe (7) is fixedly connected to the middle of the circulation pipe (8). The middle port of the three-way pipe (7) is fixedly connected to one end of the connecting pipe (6). The other end of the connecting pipe (6) is fixedly connected to one side port of the three-way valve (5). The other side port of the three-way valve (5) is fixedly connected to the air outlet of the oxygen tank (4). The middle port of the three-way valve (5) is connected to an external gas supply fan. A valve is fixedly connected to the connecting pipe (6).

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