A heat resistance performance experiment box

Abstract

This application relates to the technical field of heat resistance testing equipment, and in particular to a heat resistance performance test chamber, which includes a chamber body and a lid. The chamber body contains a testing platform for placing the product to be tested. A heating chamber is located at the bottom of the chamber body, containing multiple electric heating tubes arranged in a ring around the perimeter. A first fan is located at the air inlet at the bottom of the heating chamber. The heating chamber and the chamber body are connected via a guide pipe. The chamber body has an air outlet. A ring pipe with multiple air outlets is also located inside the chamber and connected to the guide pipe. The air inlet contains a hollow ring with a specific structure, a first cylinder, and corresponding heat-conducting holes. The testing platform is a movable perforated plate that can be raised and lowered by a motor and a lead screw. The air inlet of the first fan has a dustproof screen, and the end of the second pipe has a guide grille. The top of the heating chamber is connected to the bottom of the chamber body via multiple support rods. This application achieves the technical effects of effectively testing the heat resistance performance of materials, making the testing environment temperature more uniform, improving testing accuracy, and facilitating operation and maintenance.

Description

Technical Field

[0001] This application relates to the technical field of heat resistance testing equipment, and in particular to a heat resistance performance test chamber. Background Technology

[0002] Heat resistance testing refers to testing a product's ability to withstand high-temperature environments. It assesses the product's reliability and stability under high-temperature conditions to ensure it will not malfunction or be damaged during use. Heat resistance test chambers are commonly used to test the heat resistance of products, electronic instruments, materials, electrical and electronic products, and electronic components at high temperatures.

[0003] Chinese patent CN106124555A discloses a heat resistance test chamber for electrical wires. The disclosed structure includes a hollow cylindrical test chamber shell. Multiple supports are evenly arranged along the circumference of the inner surface of the hollow cylindrical test chamber shell. Each support is equipped with an electric heating rod. An electrical wire support for placing the power supply wire is provided in the middle of the test chamber shell. The diameter of the circle formed by the multiple electric heating rods is greater than or equal to 0.5 meters and less than or equal to 0.6 meters. An air inlet is also provided on the hollow cylindrical test chamber shell.

[0004] Cold air directly impacts the surface of the heating rod through the air inlet, causing a sharp drop in heat exchange efficiency in that area and forming "cold spots." At the same time, the insufficiently heated airflow quickly flows out of the test chamber, resulting in temperature differences on the product to be heated and uneven heating, which is a significant drawback. Utility Model Content

[0005] To alleviate the problem of uneven heating of products tested inside the chamber, this application provides a heat resistance performance test chamber.

[0006] A heat resistance test chamber includes a chamber body and a lid. The chamber body is provided with a testing platform for placing the product to be tested. A heating chamber is provided at the bottom of the chamber body. The heating chamber is provided with multiple electric heating tubes arranged in a ring around the heating chamber. An air inlet is provided at the bottom of the heating chamber. A first fan is provided in the air inlet. The heating chamber is connected to the chamber body through a guide pipe. An air outlet is provided on the chamber body.

[0007] By adopting the above technical solution, multiple electric heating tubes arranged in a ring around the heating chamber heat the air entering the chamber. A first fan draws the air into the chamber through the air inlet, and the heated air then enters the chamber through a guide pipe. This allows for uniform and effective heating of the product under test. Compared to directly introducing cold air into the chamber containing the heating rods and the product, this avoids the problems of sudden temperature drops in certain areas and uneven heating leading to poor heating results. It better simulates the heat resistance environment of the product during actual use, improving the accuracy of the experimental results. Simultaneously, an air outlet on the chamber ensures air circulation within the chamber, making the heating process more stable.

[0008] Preferably, the housing is provided with a ring pipe, and the ring pipe has multiple air outlets evenly distributed circumferentially, all of which are oriented toward the testing platform. The ring pipe is connected to the guide pipe through a first pipe.

[0009] By adopting the above technical solution, the chamber uses the first fan in the air inlet at the bottom of the heating chamber to draw in air. The air is heated by the circumferentially distributed electric heating tubes inside the heating chamber and then enters the chamber through the guide tube. At the same time, the ring tube inside the chamber is connected to the guide tube through the first tube. The multiple air outlets of the ring tube, which are evenly distributed circumferentially and face the test platform, can make the heated air blow evenly onto the product to be tested on the test platform, which helps to improve the uniformity of heating of the product to be tested and thus improve the accuracy of the heat resistance test.

[0010] Preferably, the air inlet is provided with a hollow ring, the hollow ring is provided with a first cylinder and is attached to the inner ring wall of the hollow ring, the first fan is provided at the opening of the first cylinder, the side wall of the heating box is hollow, the end of the circumferential side wall of the heating box away from the hollow ring is provided with a plurality of first heat conduction holes, the end of the circumferential side wall of the heating box away from the guide pipe is provided with a plurality of second heat conduction holes, the plurality of second heat conduction holes are all connected to the interior of the hollow ring, the bottom side wall of the first cylinder is provided with a plurality of third heat conduction holes, the side wall of the hollow ring is provided with transition holes that correspond one-to-one with the plurality of third heat conduction holes, the air inlet extends from the open end of the first cylinder, the closed end of the first cylinder is connected to the heating box through a connector, the top wall of the heating box is connected with a second pipe, the bottom end of the second pipe has a gap with the bottom wall of the first cylinder, the second pipe is connected to the guide pipe, and a plurality of electric heating tubes are evenly arranged in a ring circumferentially inside the second pipe.

[0011] By adopting the above technical solution, when in use, the first fan and the electric heating tube are started simultaneously. The electric heating tube heats the air in the second tube and gradually diffuses the heat outward from the second tube, gradually heating the air in the hollow structure of the heating box. When the first fan sends the cold air into the hollow structure of the side wall of the heating box through the third heat conduction hole, the transition hole, and the second heat conduction hole in sequence, it can be preheated. Then it enters the heating box through the first heat conduction hole, and then enters the second tube through the gap between the second tube and the first cylinder, and comes into contact with the electric heating tube again. This avoids the cold air directly impacting the surface of the heating rod, which would cause a sharp drop in the heat exchange efficiency in that area and form a "cold spot". Finally, the heated gas enters the box through the guide tube.

[0012] Preferably, the connector includes a limiting ring, and a plurality of limiting grooves are formed on the bottom wall of the heating box. The limiting ring is sleeved on the outside of the first cylinder. The limiting ring is provided with iron pillars that correspond one-to-one with the plurality of limiting grooves. A magnetic block is provided in the limiting groove. The top surface of the limiting ring is attached to the outer bottom wall of the heating box. The iron pillars are inserted into the limiting grooves, and the magnets attract the iron pillars. At this time, the plurality of third heat-conducting holes are connected one-to-one with the plurality of transition holes.

[0013] By adopting the above technical solution, the connecting component uses a limiting ring, and a limiting groove is opened in the bottom wall of the heating chamber. The limiting ring is fitted over the first cylinder, and an iron post is set on it corresponding to the limiting groove. A magnetic block is set inside the limiting groove. The top surface of the limiting ring is attached to the outer bottom wall of the heating chamber. The iron post is inserted into the limiting groove and is attracted by the magnetic block, so that the third heat conduction hole and the transition hole are connected. This solution enables the experimental chamber to have a heat resistance testing function. The cooperation of the limiting ring, iron post, magnetic block and limiting groove can accurately position the first cylinder, ensure that the third heat conduction hole and the transition hole are connected, and ensure that the heat conduction path is unobstructed.

[0014] Preferably, the testing platform includes a movable orifice plate, a motor is provided on the housing, the output shaft of the motor is coaxially connected to a lead screw, the lead screw is threadedly connected to the movable orifice plate, a guide rod is vertically provided on the housing, the guide rod passes through the movable orifice plate and slides with the movable orifice plate, the movable orifice plate is a circular plate, and the diameter of the movable orifice plate is smaller than the diameter of the air outlet.

[0015] By adopting the above technical solution, the motor drives the lead screw to rotate, causing the movable orifice plate, which is threadedly connected to the lead screw, to slide along the guide rod, thus moving the movable orifice plate out of the box and making it easy to take out the tested products.

[0016] Preferably, a dustproof net is provided at the air inlet of the first fan.

[0017] By adopting the above technical solution, a dustproof net is installed at the air inlet of the first fan of the heat resistance test chamber, which can prevent dust from entering the heating chamber and the chamber body, avoid dust affecting the normal operation of the internal equipment of the test chamber and causing contamination to the products to be tested, and ensure the accuracy of the test results.

[0018] Preferably, the end of the second tube facing the first tube is provided with a flow guide grille.

[0019] By adopting the above technical solution, a flow guide grid is set at the end of the second tube facing the first cylinder, which can divide the airflow into uniform fine streams, avoid the formation of large streams of cold air impacting the local electric heating rod, and make the airflow flow more uniformly and stably. This is conducive to improving the uniformity and stability of the temperature in the experimental chamber and improving the accuracy of the heat resistance test.

[0020] Preferably, the top of the heating box is connected to the bottom of the box body by multiple support rods.

[0021] By adopting the above technical solution, multiple support rods maintain a certain distance between the heating box and the box body, which is conducive to air circulation and enhances heat dissipation, while ensuring a stable connection between the two and guaranteeing structural stability and safety.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The air inlet at the bottom of the heating chamber is equipped with a first fan, which, together with multiple electric heating tubes distributed in a ring around the inside of the chamber, delivers hot air to the chamber through a guide pipe, making the heating of the experimental chamber more efficient, ensuring uniform temperature in the testing space, and enabling more accurate testing of the heat resistance performance of the product. 2. The air vents in the ring pipe inside the chamber are evenly distributed around the circumference and face the test stage, which can make the temperature distribution around the product to be tested more uniform. 3. The motor drives the lead screw to rotate, which in turn causes the movable orifice plate, which is threadedly connected to the lead screw, to slide along the guide rod, making it easy for operators to pick up and put down the products to be tested. Attached Figure Description

[0023] Figure 1 This is a structural diagram of this application.

[0024] Figure 2 This is a cross-sectional view of the internal structure of the box in an embodiment of this application.

[0025] Figure 3 This is a cross-sectional view of the internal structure of the heating box in an embodiment of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Box body; 2. Box cover; 3. Testing platform; 4. Heating box; 5. Electric heating tube; 6. First fan; 7. Guide tube; 8. Connecting hole; 10. Support rod; 11. First tube; 12. Ring tube; 13. Air outlet; 14. Air inlet; 15. Hollow ring; 16. First cylinder; 17. Dustproof net; 18. First heat conduction hole; 19. Second heat conduction hole; 20. Third heat conduction hole; 21. Transition hole; 22. Second tube; 23. Guide grid; 24. Limiting ring; 25. Limiting groove; 26. Iron column; 27. Magnetic block; 28. Moving orifice plate; 29. ​​Connecting block; 30. Motor; 31. Lead screw; 32. Guide rod; 33. Guide hole. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0028] This application discloses a heat resistance testing chamber. (Refer to...) Figure 1 and Figure 2 A heat resistance test chamber includes a chamber body 1 and a chamber cover 2. The chamber body 1 is provided with a test platform 3 for placing the product to be tested, and also includes a heating chamber 4, an electric heating tube 5, a first fan 6, and a guide tube 7. Reference Figure 1 and Figure 2 The chamber 1 and the cover 2 cooperate to form a heat resistance testing space. The top of the chamber 1 is provided with an air outlet, and the cover 2 is threaded to the air outlet. Multiple connecting holes 8 are opened on the side wall of the cover 2, which are connected to the inside of the chamber 1. When gas needs to be discharged, the cover 2 is rotated upward so that the multiple connecting holes 8 are connected to the atmosphere. The heating box 4 is located at the bottom of the chamber 1. The heating box 4 is cylindrical, and multiple electric heating tubes 5 are distributed in a ring around the circumference inside the heating box 4. The heating box 4 is connected to the chamber 1 through a guide pipe 7. In order to improve stability, the top wall of the heating box 4 is connected to the bottom of the chamber 1 through multiple support rods 10.

[0029] Reference Figure 1 , Figure 2 and Figure 3One end of the guide pipe 7 is connected to a ring pipe 12 via a first pipe 11. The ring pipe 12 is located inside the housing 1. Multiple air outlets 13 are evenly distributed on the circumferential sidewall of the ring pipe 12, and all the air outlets 13 are oriented towards the testing platform 3. An air inlet 14 is provided at the bottom of the heating box 4. A hollow ring 15 is fixedly connected inside the air inlet 14. A first cylinder 16 is provided inside the hollow ring 15. The first cylinder 16 is in contact with the inner ring wall of the hollow ring 15. A first fan 6 is connected to the opening of the first cylinder 16. A dustproof net 17 is provided at the air inlet of the first fan 6. The sidewall of the heating box 4 is also hollow. Multiple first heat conduction holes 18 are provided at the end of the circumferential sidewall of the heating box 4 away from the hollow ring 15. Multiple second heat conduction holes 19 are provided on the circumferential sidewall of the heating box 4 away from the guide pipe. All the multiple second heat conduction holes 19 are connected to the inside of the hollow ring 15.

[0030] Reference Figure 1 , Figure 2 and Figure 3 The bottom sidewall of the first cylinder 16 is provided with a plurality of third heat conduction holes 20. The sidewall of the hollow ring 15 is provided with transition holes 21 that correspond to and communicate with the plurality of third heat conduction holes 20, and with guide holes that correspond to and communicate with the plurality of second heat conduction holes 19. One open end of the first cylinder 16 extends into an air inlet 14. The closed end of the first cylinder 16 is connected to the heating box 4 through a connector. The top of the heating box 4 is connected to a second pipe 22. The second pipe 22 is vertically arranged. The end of the second pipe 22 facing the first cylinder 16 is fixedly connected to a guide grille 23. There is a gap between the bottom end of the second pipe 22 and the outer bottom wall of the first cylinder 16. The second pipe 22 is connected to a guide pipe. A plurality of electric heating tubes 5 are evenly arranged in a ring circumferential direction inside the second pipe 22.

[0031] Reference Figure 1 , Figure 2 and Figure 3 The connector includes a limiting ring 24. Multiple limiting grooves 25 are provided on the outer bottom wall of the heating box 4. The limiting ring 24 is fixedly sleeved on the outside of the first cylinder 16. Iron pillars 26, which are arranged one-to-one with the multiple limiting grooves 25, are fixedly connected to the limiting ring 24. A magnetic block 27 is provided at the bottom of the limiting groove 25. The top surface of the limiting ring 24 is attached to the outer bottom wall of the heating box 4. The iron pillars 26 are inserted into the limiting grooves 25. The magnet attracts the iron pillars 26. At this time, multiple third heat conduction holes 20 are connected to multiple transition holes 21 one-to-one, and multiple second heat conduction holes 19 are connected to multiple flow guide holes one-to-one.

[0032] Reference Figure 1 , Figure 2 and Figure 3The first fan 6 inside the air inlet 14 introduces air into the heating chamber 4. The hot air enters the chamber 1 through the guide pipe 7, and the air outlet on the chamber 1 discharges the gas. This structure makes the temperature inside the chamber 1 more uniform, enabling more accurate testing of the product's heat resistance. Because the annularly distributed electric heating tubes 5 can heat the air from multiple directions, making the air heated more evenly, the first fan 6 promotes airflow, and the hot air is transferred into the chamber 1 through the guide pipe 7, thereby making the temperature inside the chamber 1 uniform.

[0033] Reference Figure 1 , Figure 2 and Figure 3 The testing table 3 includes a movable perforated plate 28 and two connecting blocks 29. The movable perforated plate 28 is used to place the workpiece. The two connecting blocks 29 are fixedly connected to both sides of the movable perforated plate 28. A motor 30 is installed on the housing 1. The output shaft of the motor 30 is coaxially connected to a lead screw 31. The lead screw 31 is threadedly connected to one of the connecting blocks 29. A guide rod 32 is vertically fixedly connected to the housing 1. The guide rod 32 passes through another connecting block 29 and slides with this connecting block 29. The movable perforated plate 28 is a circular plate. The diameter of the movable perforated plate 28 is smaller than the diameter of the air outlet.

[0034] The implementation principle of this embodiment is as follows: By setting a hollow ring 15 and a first cylinder 16 inside the air inlet 14, the air flow path is increased, allowing the air to be preheated within the hollow ring 15 and the first cylinder 16 before entering the heating chamber 4, further improving the heating efficiency and uniformity. Furthermore, multiple circumferentially distributed electric heating tubes 5 within the heating chamber 4 heat the air entering the chamber. The first fan 6 draws the air into the heating chamber 4 through the air inlet 14, and the heated air enters the chamber 1 through the guide pipe 7. This allows for uniform and effective heating of the product to be tested. Compared to directly introducing cold air into the chamber 1 containing the heating rods and the product, this avoids the problem of sudden temperature drops in certain areas and poor heating due to uneven heating, better simulating the heat resistance environment of the product during actual use and improving the accuracy of the experimental results. Simultaneously, an air outlet is provided on the chamber 1 to ensure air circulation within the chamber 1, making the heating process more stable.

[0035] 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 heat resistance test chamber, comprising a chamber body (1) and a chamber lid (2), wherein the chamber body (1) is provided with a testing platform (3) for placing the product to be tested, characterized in that, The bottom of the housing (1) is provided with a heating box (4), and the heating box (4) is provided with multiple electric heating tubes (5). The multiple electric heating tubes (5) are arranged in a ring circumferential distribution in the heating box (4). The bottom of the heating box (4) is provided with an air inlet (14), and the air inlet (14) is provided with a first fan (6). The heating box (4) is connected to the housing (1) through a guide pipe (7), and the housing (1) is provided with an air outlet.

2. The heat resistance test chamber according to claim 1, characterized in that, The housing (1) is provided with a ring pipe (12), and a plurality of air outlets (13) are evenly distributed around the ring pipe (12). The plurality of air outlets (13) are all arranged facing the testing platform (3). The ring pipe (12) is connected to the guide pipe (7) through the first pipe (11).

3. The heat resistance test chamber according to claim 1, characterized in that, The air inlet (14) is provided with a hollow ring (15), and a first cylinder (16) is provided inside the hollow ring (15) and is attached to the inner ring wall of the hollow ring (15). The first fan (6) is located at the opening of the first cylinder (16). The side wall of the heating box (4) is hollow. Multiple first heat conduction holes (18) are opened at the end of the circumferential side wall of the heating box (4) away from the hollow ring (15). Multiple second heat conduction holes (19) are opened at the end of the circumferential side wall of the heating box (4) away from the guide pipe (7). The multiple second heat conduction holes (19) are all connected to the inside of the hollow ring (15). The bottom side wall of the first cylinder (16) is circumferentially... Multiple third heat conduction holes (20) are provided. The side wall of the hollow ring (15) is provided with transition holes (21) that correspond one-to-one with the multiple third heat conduction holes (20). One end of the opening of the first cylinder (16) extends out of the air inlet (14). The closed end of the first cylinder (16) is connected to the heating box (4) through a connector. The top wall of the heating box (4) is connected to a second pipe (22). There is a gap between the bottom end of the second pipe (22) and the bottom wall of the first cylinder (16). The second pipe (22) is connected to the guide pipe (7). Multiple electric heating tubes (5) are evenly arranged in a ring circumferential direction inside the second pipe (22).

4. The heat resistance test chamber according to claim 3, characterized in that, The connector includes a limiting ring (24). Multiple limiting grooves (25) are provided on the bottom wall of the heating box (4). The limiting ring (24) is sleeved on the outside of the first cylinder (16). The limiting ring (24) is provided with iron pillars (26) that correspond one-to-one with the multiple limiting grooves (25). A magnetic block (27) is provided in the limiting groove (25). The top surface of the limiting ring (24) is attached to the outer bottom wall of the heating box (4). The iron pillar (26) is inserted into the limiting groove (25). The magnetic block (27) attracts the iron pillar (26). At this time, the multiple third heat conduction holes (20) are connected one-to-one with the multiple transition holes (21).

5. A heat resistance test chamber according to claim 1, characterized in that, The testing platform (3) includes a movable orifice plate (28). A motor (30) is provided on the housing (1). The output shaft of the motor (30) is coaxially connected to a lead screw (31). The lead screw (31) is threadedly connected to the movable orifice plate (28). A guide rod (32) is vertically provided on the housing (1). The guide rod (32) passes through the movable orifice plate (28) and slides with the movable orifice plate (28). The movable orifice plate (28) is a circular plate. The diameter of the movable orifice plate (28) is smaller than the diameter of the air outlet.

6. A heat resistance test chamber according to claim 1, characterized in that, The first fan (6) is equipped with a dustproof screen (17) at its air inlet.

7. A heat resistance test chamber according to claim 3, characterized in that, The second tube (22) is provided with a flow guide grille (23) at one end facing the first cylinder (16).

8. A heat resistance test chamber according to claim 1, characterized in that, The top of the heating box (4) is connected to the bottom of the box body (1) by multiple support rods (10).

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