High-temperature test system for maintaining temperature of circulating system in internal and external circulation mode

Abstract

The invention relates to the technical field of high-temperature testing systems, in particular to a high-temperature testing system for maintaining the temperature of a circulating system in an internal and external circulation mode, which comprises a bottom plate, a product testing system integrally arranged on the bottom plate, and a high-temperature circulating system butted with the product testing system, the product testing system comprises a testing base body, a lower needle disc plate installed on the testing base body, a product testing plate installed on the lower needle disc plate and a testing pressure bar jig which is in butt joint with the lower needle disc plate and can be opened upwards, and a testing bin with the open left side and the open right side is formed between the testing pressure bar jig and the testing base body. An internal circulation system is arranged by ingeniously utilizing the first three-way regulating valve and the second three-way regulating valve in combination with the valve assembly, heat can be recycled in the system in the product taking and placing process, the situation that a large amount of cold air is reheated to recover the temperature of a test bin like a traditional system is not needed, energy consumption is greatly reduced, and cost is reduced. And the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature test systems, and particularly to a high-temperature test system that maintains the temperature of a circulation system by means of internal and external circulation. Background Art

[0002] With the rapid development of technology, electronic products have been widely used in various fields. In many special working environments, such as aerospace, automotive electronics, industrial control, etc., electronic products need to have good high-temperature resistance to ensure their stable operation and reliability. Therefore, high-temperature testing has become a crucial link in the production process of electronic products.

[0003] Existing high-temperature test systems mainly simulate a high-temperature environment and let electronic products operate in this environment for a certain period of time to detect whether their high-temperature resistance performance meets the standards. However, there are many defects in such traditional high-temperature test systems.

[0004] During the operation of taking and placing products, existing high-temperature test systems have to stop supplying high temperature. This is because the high-temperature environment poses a safety risk to operators, and it is difficult to perform accurate product taking and placing operations while the high temperature is continuously supplied. However, the stop of high-temperature supply will cause the temperature of the entire test system to drop rapidly. When the high-temperature supply is restored after the product is taken and placed, a large amount of energy is required to raise the temperature of the test system back to the set value again, which undoubtedly causes a great waste of energy.

[0005] At the same time, when taking and placing products, the test chamber needs to be opened. As a key part for maintaining the high-temperature environment, once the test chamber is opened, the internal high-temperature gas will quickly exchange heat with the outside cold air, resulting in a large amount of heat loss. This heat loss not only increases energy consumption but also affects the accuracy and consistency of test results. Because each time the test chamber is opened, the rate of temperature change and the finally reached stable temperature during the re-heating process may be different from before, thus interfering with the accurate evaluation of the high-temperature resistance performance of electronic products.

[0006] In addition, frequently stopping the high-temperature supply and opening the test chamber will also shorten the service life of high-temperature test equipment. The large temperature fluctuations and the frequent opening and closing of the test chamber will cause mechanical stress and thermal stress impacts on key components such as the heating elements and sealing devices of the equipment, accelerating the aging and damage of the components, increasing the equipment maintenance cost and downtime.

[0007] In summary, the existing high-temperature test systems have problems such as high energy consumption, inaccurate test results, and shortened equipment life during the process of picking and placing products, which seriously restrict the efficiency and quality of high-temperature testing of electronic products. Therefore, it is of great practical significance and market demand to develop a new type of high-temperature test system that can reduce heat loss and energy consumption during the picking and placing of products, while ensuring the accuracy of test results and the stability of the equipment. Summary of the Invention

[0008] The present invention aims to provide a technical solution to solve the above problems in order to overcome the above deficiencies.

[0009] A high-temperature test system that uses an internal and external circulation method to maintain the temperature of the circulation system, including a bottom plate, a product test system integrally arranged on the bottom plate, and a high-temperature circulation system docked to the product test system. The product test system includes a test base body, a lower needle plate installed on the test base body, a product test board installed on the lower needle plate, and a test pressure rod fixture docked on the lower needle plate and capable of being opened upwards. An open test chamber is formed between the test pressure rod fixture and the test base body on both the left and right sides. The high-temperature circulation system includes an air inlet equalizing air module, an air outlet equalizing air module, a high-temperature resistant air inlet pipe, a high-temperature resistant air outlet pipe, a first three-way regulating valve, a second three-way regulating valve, an internal circulation air pipe, and a hot air supply module, where: The air inlet equalizing air module, the high-temperature resistant air inlet pipe, the first three-way regulating valve, the hot air supply module, the second three-way regulating valve, the high-temperature resistant air outlet pipe, and the air outlet equalizing air module are hermetically docked in sequence, and are hermetically docked to both sides of the test chamber through the air inlet equalizing air module and the air outlet equalizing air module respectively to form an external circulation system; The internal circulation air pipe is hermetically connected between the first three-way regulating valve and the second three-way regulating valve, so that the internal circulation air pipe, the first three-way regulating valve, the hot air supply module, and the second three-way regulating valve form an internal circulation system; Both the first three-way regulating valve and the second three-way regulating valve are provided with valve assemblies. The first three-way regulating valve conducts the high-temperature resistant air inlet pipe or the internal circulation air pipe through the valve assembly, and the second three-way regulating valve conducts the high-temperature resistant air outlet pipe or the internal circulation air pipe through the valve assembly.

[0010] Preferably, the test pressure rod fixture includes a power connection plate, a heat insulation top plate installed at the lower end of the power connection plate, an upper needle plate installed at the lower end of the heat insulation top plate, heat insulation side plates fixedly connected to the front and rear side positions of the upper needle plate, at least one pressure rod main body installed at the lower end of the upper needle plate, and a first guide rod installed at the lower end of the upper needle plate. A first guide bearing corresponding to the first guide rod is provided on the lower needle plate, and a first sealing rubber strip is provided at the lower end of the heat insulation side plate. The heat insulation side plate is hermetically docked with the front and rear side positions of the lower needle plate through the sealing rubber strip.

[0011] Preferably, a second guiding bearing is provided on the lower needle plate, and a second guiding rod docked with the second guiding bearing is provided on the product test plate. A spring member is further provided between the lower needle plate and the product test plate.

[0012] Preferably, the test base includes a heat-insulating electric box fixedly installed on the bottom plate, a needle plate connector installed on the side of the heat-insulating electric box and electrically connected to the lower needle plate, a sliding seat slidably connected to the bottom plate, and a connector plug board provided on the sliding seat and docked with the needle plate connector. The connector plug board is oriented to dock with or disengage from the needle plate connector through the sliding fit between the sliding seat and the bottom plate. The lower needle plate is installed at the upper end of the heat-insulating electric box.

[0013] Preferably, both the air inlet equalizing air module and the air outlet equalizing air module include a horizontal driving force unit and a heat-insulating air equalizing box power-connected to the horizontal driving force unit. An air equalizing opening is provided on one side of the heat-insulating air equalizing box, and a second sealing strip is provided at the edge of the heat-insulating air equalizing box corresponding to the air equalizing opening. The horizontal driving force unit is used to drive the heat-insulating air equalizing box so that the air equalizing opening docks with or disengages from the test chamber, and is sealed by the second sealing strip when the air equalizing opening docks with the test chamber. On the other side of the heat-insulating air equalizing box perpendicular to the air equalizing opening, a side air opening is provided. Both the high-temperature air inlet pipe and the high-temperature air outlet pipe are set as stretchable pipe structures adapted to the moving stroke of the heat-insulating air equalizing box. The heat-insulating air equalizing box of the air inlet equalizing air module is connected to the high-temperature air inlet pipe through the side air opening, and the heat-insulating air equalizing box of the air outlet equalizing air module is connected to the high-temperature air outlet pipe through the side air opening.

[0014] Preferably, an air equalizing plate is provided inside the heat-insulating air equalizing box. In the air inlet equalizing air module, the heat-insulating air equalizing box evenly blows the hot air blown into from the side air opening out of the air equalizing opening through the air equalizing plate.

[0015] Preferably, the first three-way regulating valve, the second three-way regulating valve, the inner circulation air pipe, and the hot air supply module are all arranged below the bottom plate. The high-temperature air inlet pipe and the high-temperature air outlet pipe both pass through the bottom plate and are respectively connected to the first three-way regulating valve and the second three-way regulating valve.

[0016] Preferably, both the first three-way regulating valve and the second three-way regulating valve are provided with an outer circulation connection air opening, an inner circulation connection air opening, and a main connection air opening that communicate with each other. Both the first three-way regulating valve and the second three-way regulating valve are connected to the hot air supply module through the main connection air opening, both are connected to the inner circulation air pipe through the inner circulation connection air opening, and both are respectively connected to the high-temperature air inlet pipe and the high-temperature air outlet pipe through the outer circulation connection air opening.

[0017] Preferably, the valve assembly includes a rotating shaft member rotatably connected inside the first three-way regulating valve or the second three-way regulating valve, a valve body fixed on the rotating shaft member and capable of covering the external circulation connection air outlet or the internal circulation connection air outlet, a cylinder fixedly installed on the bottom plate, and a gear-rack transmission assembly drivingly connected between the cylinder and the rotating shaft member.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: By cleverly using the first three-way regulating valve and the second three-way regulating valve in combination with the valve assembly to set up the internal circulation system, during the process of product loading and unloading, heat can be recycled inside the system, without the need to reheat a large amount of cold air like in the traditional system to restore the temperature of the test chamber, greatly reducing energy consumption and lowering production costs. Moreover, whether it is the external circulation or the internal circulation, the air inlet equalizing module and the air outlet equalizing module ensure that the hot air entering the test chamber is evenly distributed, making the temperature field in the test chamber more uniform, reducing the test errors caused by uneven temperature, and improving the accuracy and reliability of the test results. Due to the reduction of the large temperature fluctuations and the thermal stress impact brought by heat exchange, the wear and tear of key components of equipment such as the hot air supply module and the air duct are reduced, the overall service life of the equipment is extended, and the equipment maintenance cost and downtime are reduced. The internal circulation system enables the product loading and unloading process to not require waiting for a long time for heating and cooling, and the operator can complete the product loading and unloading operations more quickly, improving the overall efficiency of the test work and being beneficial to the high-temperature testing of large-scale electronic products.

[0019] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the product testing system in the present invention; Figure 3 is a schematic structural diagram of the product testing system in the present invention in the state of opening the test pressing bar fixture; Figure 4 is a schematic structural diagram of the lower needle plate, the product testing plate and the test pressing bar fixture in the present invention; Figure 5It is a schematic side view of the lower needle plate and the product test plate in the present invention; Figure 6 It is a schematic structural diagram of the high-temperature circulation system in the present invention; Figure 7 It is a schematic structural diagram of the heat insulation and air distribution box in the present invention; Figure 8 It is a simulated wind speed diagram of the heat insulation and air distribution box in the present invention; Figure 9 It is a schematic structural diagram of the high-temperature resistant air inlet pipe, the high-temperature resistant air outlet pipe, the first three-way regulating valve, the second three-way regulating valve, the inner circulation air pipe and the valve assembly in the combined state in the present invention; Figure 10 It is a schematic structural diagram of the valve assembly and the three-way regulating valve in the disassembled state in the present invention.

[0022] The reference numerals and names in the figure are as follows: Base plate 10, product test system 20, test matrix 21, heat insulation electric box 211, needle plate connector 212, sliding seat 213, connector plug board 214, lower needle plate 22, second guide bearing 221, second guide rod 222, spring member 223, product test plate 23, test pressing rod fixture 24, power connection plate 241, heat insulation top plate 242, upper needle plate 243, heat insulation side plate 244, pressing rod main body 245, first guide rod 246, first guide bearing 247, first sealing strip 248, test chamber 25, high-temperature circulation system 30, air inlet and air distribution module 31, air outlet and air distribution module 32, high-temperature resistant air inlet pipe 33, high-temperature resistant air outlet pipe 34, first three-way regulating valve 35, second three-way regulating valve 36, inner circulation air pipe 37, hot air supply module 38, valve assembly 39, rotating shaft member 391, valve main body 392, cylinder 393, gear-rack transmission assembly 394, horizontal driving unit 41, heat insulation and air distribution box 42, air distribution opening 43, second sealing strip 44, side air outlet 45, air distribution plate 46, outer circulation connection air opening 51, inner circulation connection air opening 52, main connection air opening 53. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-10, in the embodiment of the present invention, a high-temperature test system for maintaining the temperature of a circulation system by using an internal and external circulation method includes a bottom plate 10, a product test system 20 integrally arranged on the bottom plate 10, and a high-temperature circulation system 30 docked to the product test system 20. The product test system 20 includes a test base 21, a lower needle plate 22 mounted on the test base 21, a product test board 23 mounted on the lower needle plate 22, and a test pressure bar fixture 24 docked on the lower needle plate 22 and capable of being opened upwards. An open test chamber 25 is formed between the test pressure bar fixture 24 and the test base 21 on both left and right sides; The high-temperature circulation system 30 includes an air inlet equalizing air module 31, an air outlet equalizing air module 32, a high-temperature resistant air inlet pipe 33, a high-temperature resistant air outlet pipe 34, a first three-way regulating valve 35, a second three-way regulating valve 36, an internal circulation air pipe 37, and a hot air supply module 38, where: The air inlet equalizing air module 31, the high-temperature resistant air inlet pipe 33, the first three-way regulating valve 35, the hot air supply module 38, the second three-way regulating valve 36, the high-temperature resistant air outlet pipe 34, and the air outlet equalizing air module 32 are hermetically docked in sequence, and are hermetically docked to both sides of the test chamber 25 through the air inlet equalizing air module 31 and the air outlet equalizing air module 32 respectively to form an external circulation system; The internal circulation air pipe 37 is hermetically connected between the first three-way regulating valve 35 and the second three-way regulating valve 36, so that the internal circulation air pipe 37, the first three-way regulating valve 35, the hot air supply module 38, and the second three-way regulating valve 36 form an internal circulation system; Both the first three-way regulating valve 35 and the second three-way regulating valve 36 are provided with valve assemblies 39. The first three-way regulating valve 35 conducts the high-temperature resistant air inlet pipe 33 or the internal circulation air pipe 37 through the valve assembly 39, and the second three-way regulating valve 36 conducts the high-temperature resistant air outlet pipe 34 or the internal circulation air pipe 37 through the valve assembly 39.

[0025] Its working principle is as follows: Working principle of the external circulation system: When the test system is started and in a normal test state, the hot air supply module 38 starts to operate, which can generate hot air as high as 200°C or more. The high-temperature hot air flows into the high-temperature resistant air inlet pipe 33 through the first three-way regulating valve 35, and then reaches the air inlet equalization module 31. After the air inlet equalization module 31 evenly disperses the hot air, it is sent into the test chamber 25 to create a high-temperature environment for product testing. In the test chamber 25, the hot air with a temperature of more than 200°C exchanges heat with the electronic products placed on the product test board 23, takes away the heat generated by the electronic products during operation, and its own temperature is reduced accordingly. After that, these cooled hot air flows out from the other side of the test chamber 25, enters the air outlet equalization module 32, and after flow equalization, returns to the hot air supply module 38 through the high-temperature resistant air outlet pipe 34 and the second three-way regulating valve 36. In the hot air supply module 38, the hot air is heated again to complete an external cycle, and the high temperature environment of more than 100°C in the test chamber 25 is continuously maintained to perform high temperature resistance test on the product.

[0026] Working principle of the internal circulation system: When it is necessary to carry out product placement operations, first open the test pressure rod fixture 24, and use the manipulator to complete the placement of the product. At this time, the valve assembly 39 of the first three-way regulating valve 35 and the second three-way regulating valve 36 is actuated. The first three-way regulating valve 35 cuts off the conduction with the high-temperature resistant air inlet pipe 33, and turns on the internal circulation air duct 37. At the same time, the second three-way regulating valve 36 cuts off the conduction with the high-temperature resistant air outlet pipe 34, and also turns on the internal circulation air duct 37. The sensor set in the internal circulation system detects the temperature in real time. The high-temperature hot air generated by the hot air supply module 38 and the hot air remaining in the test chamber 25 form an internal circulation between the first three-way regulating valve 35, the hot air supply module 38 and the second three-way regulating valve 36 through the internal circulation air duct 37. In this process, the hot air flows in a relatively closed internal circulation system, avoiding heat exchange with the external cold air, and greatly reducing the loss of heat.

[0027] Therefore, through the above technical solution, an internal circulation system is adopted. During the process of product loading and unloading, heat can be recycled within the system, eliminating the need to reheat a large amount of cold air like in traditional systems to restore the temperature of the test chamber 25. This greatly reduces energy consumption and production costs. Whether it is the external circulation or the internal circulation, the air inlet equalizing module 31 and the air outlet equalizing module 32 ensure that the hot air entering the test chamber 25 is evenly distributed, making the temperature field in the test chamber 25 more uniform, reducing test errors caused by uneven temperature, and improving the accuracy and reliability of test results. Due to the reduction of large fluctuations in temperature and thermal stress shocks caused by heat exchange, the wear and tear on key components of equipment such as the hot air supply module 38 and the air ducts is reduced, extending the overall service life of the equipment, and reducing equipment maintenance costs and downtime. The internal circulation system enables the product loading and unloading process to not require waiting for long heating and cooling processes. Operators can complete the product loading and unloading operations more quickly, improving the overall efficiency of the test work, which is beneficial to the high-temperature testing of large-scale electronic products.

[0028] Please refer to Figures 3-4 , based on the above technical solution, it is further proposed that the test pressure rod fixture 24 includes a power connection plate 241, a heat insulation top plate 242 installed at the lower end of the power connection plate 241, an upper needle plate 243 installed at the lower end of the heat insulation top plate 242, heat insulation side plates 244 fixedly connected to the front and rear sides of the upper needle plate 243, at least one pressure rod main body 245 installed at the lower end of the upper needle plate 243, and a first guide rod 246 installed at the lower end of the upper needle plate 243. A first guide bearing 247 corresponding to the first guide rod 246 is provided on the lower needle plate 22. A first sealing strip 248 is provided at the lower end of the heat insulation side plate 244, and the heat insulation side plate 244 is hermetically docked with the front and rear sides of the lower needle plate 22 through the sealing strip. Among them, the power connection plate 241 provides power connection for the entire fixture to ensure that it can smoothly perform the opening and closing actions. The heat insulation top plate 242 and the heat insulation side plates 244 can effectively prevent heat from dissipating from the upper part and the sides of the test chamber 25, reducing heat exchange, cooperating with the internal circulation system to further reduce energy consumption, stabilizing the high-temperature environment in the test chamber 25 at the same time, and improving test stability. The upper needle plate 243 and the lower needle plate 22 work together to ensure the accuracy of the electrical connection during product testing. The pressure rod main body 245 can firmly press the product to ensure the fixation of the product position during the test. The cooperation between the first guide rod 246 and the first guide bearing 247 makes the test pressure rod fixture 24 more stable and accurate during the opening and closing process, improving the reliability and efficiency of the operation. The setting of the first sealing strip 248 enhances the sealing performance of the test chamber 25, prevents hot air leakage, maintains the uniformity of the temperature field in the test chamber 25, not only reduces heat loss and energy consumption, but also further improves the accuracy and reliability of the test results, comprehensively assisting the high-temperature test system to operate efficiently and stably.

[0029] See also Figures 2-5 On the basis of the above technical solution, it is further proposed that a second guide bearing 221 is provided on the lower needle plate 22, a second guide rod 222 docked with the second guide bearing 221 is provided on the product test plate 23, and a spring member 223 is further provided between the lower needle plate 22 and the product test plate 23. The test base 21 includes a heat-insulating electrical box 211 fixedly mounted on the bottom plate 10, a needle plate connector 212 mounted on the side of the heat-insulating electrical box 211 and electrically connected to the lower needle plate 22, a sliding seat 213 slidably connected to the bottom plate 10, and a connector plug board 214 disposed on the sliding seat 213 and docked with the needle plate connector 212. The connector plug board 214 is directional docked or detached from the needle plate connector 212 through the sliding cooperation between the sliding seat 213 and the bottom plate 10. The lower needle plate 22 is mounted on the upper end of the heat-insulating electrical box 211. Among them, the second guide bearing 221 is arranged on the lower needle plate 22 to dock with the second guide rod 222 of the product test board 23, which can accurately locate the installation position of the product test board 23, ensure that the product test board 23 remains stable during installation and use, reduce the test error caused by position deviation, and further improve the accuracy of the test results. The setting of the spring member 223 plays a buffering role. When the product test board 23 is impacted by external force or produces a small displacement due to temperature changes during the test, the spring member 223 can effectively buffer these forces, protect the product test board 23 and the test equipment, and extend their service life. The test base 21 adopts the structural setting of the heat-insulating electrical box 211, which can not only prevent the internal circuit components from being affected by high temperature, but also reduce heat loss, assist in maintaining the high temperature environment of the test chamber 25, and reduce energy consumption. The needle disk connector 212 and the connector plug plate 214 are directional connected or disconnected through the sliding seat 213, making the electrical connection of the test equipment more convenient. When the equipment needs to be maintained, parts need to be replaced, or the test layout needs to be adjusted, the connection can be quickly disconnected, which is easy to operate and improves work efficiency. At the same time, it also enhances the stability and reliability of the equipment and ensures the efficient operation of the entire high-temperature test system.

[0030] See also Figure 1 , Figure 6 and Figure 7, on the basis of the above technical solution, it is further proposed that both the air inlet equalizing air module 31 and the air outlet equalizing air module 32 include a transverse driving force unit 41 and a heat insulation equalizing air box 42 dynamically connected to the transverse driving force unit 41. One side of the heat insulation equalizing air box 42 is provided with an equalizing air port 43, and a second sealing strip 44 is arranged at the edge of the heat insulation equalizing air box 42 corresponding to the equalizing air port 43. The transverse driving force unit 41 is used to drive the heat insulation equalizing air box 42 so that the equalizing air port 43 is butted against the test chamber 25 or separated from the test chamber 25, and is sealed by the second sealing strip 44 when the equalizing air port 43 is butted against the test chamber 25; the heat insulation equalizing air box 42 cooperates with the transverse driving force unit 41 to flexibly control the butting and separation of the equalizing air port 43 and the test chamber 25, which is convenient for equipment maintenance and debugging. At the same time, the second sealing strip 44 can effectively seal during butting, preventing hot air leakage, reducing heat loss, and further reducing energy consumption. The high-temperature resistant air inlet pipe 33 and the high-temperature resistant air outlet pipe 34 with a stretchable pipe structure not only adapt to the moving stroke of the heat insulation equalizing air box 42 but also ensure the stability of the pipe connection, avoiding damage caused by pipe pulling and extending the service life of the equipment.

[0031] On the other side of the heat insulation equalizing air box 42 perpendicular to the equalizing air port 43, there is a side air port 45. The high-temperature resistant air inlet pipe 33 and the high-temperature resistant air outlet pipe 34 are both set as stretchable pipe structures adapted to the moving stroke of the heat insulation equalizing air box 42. The heat insulation equalizing air box 42 of the air inlet equalizing air module 31 is connected to the high-temperature resistant air inlet pipe 33 through the side air port 45, and the heat insulation equalizing air box 42 of the air outlet equalizing air module 32 is connected to the high-temperature resistant air outlet pipe 34 through the side air port 45. An equalizing air plate 46 is arranged inside the heat insulation equalizing air box 42. In the air inlet equalizing air module 31, the heat insulation equalizing air box 42 evenly blows the hot air blown in from the side air port 45 out from the equalizing air port 43 through the equalizing air plate 46. The arrangement of the equalizing air plate 46 optimizes the uniform distribution of the hot air. In the air inlet equalizing air module 31, the hot air blown in from the side air port 45 can be evenly blown out from the equalizing air port 43. Whether it is an external circulation or an internal circulation, the equalizing air module ensures the uniform distribution of the hot air entering the test chamber 25. As Figure 7 shown, the multiple arc surface guiding structures of the equalizing air plate 46 can evenly disperse the hot air, making the temperature field in the test chamber 25 more uniform, reducing the test error caused by uneven temperature, and improving the accuracy and reliability of the test results. As Figure 8 shown, it is the wind speed simulation diagram of the heat insulation equalizing air box. After actual testing, after adopting the structure of the equalizing air plate 46, the temperature deviation at different positions in the test chamber 25 can be controlled within a very small range, effectively ensuring the stability of the test. In addition, due to reducing the large fluctuations in temperature and the thermal stress impact caused by heat exchange, the loss of key components of equipment such as the hot air supply module 38 and the air pipes is reduced, the overall service life of the equipment is extended, and the equipment maintenance cost and downtime are reduced.

[0032] Please refer to Figures 9-10, on the basis of the above technical solution, it is further proposed that the first three-way regulating valve 35, the second three-way regulating valve 36, the internal circulation air duct 37 and the hot air supply module 38 are all arranged below the bottom plate 10. The high-temperature resistant air inlet pipe 33 and the high-temperature resistant air outlet pipe 34 both pass through the bottom plate 10 and are respectively connected to the first three-way regulating valve 35 and the second three-way regulating valve 36. The first three-way regulating valve 35 and the second three-way regulating valve 36 are both provided with an externally circulated connection air port 51, an internally circulated connection air port 52 and a main connection air port 53 that communicate with each other. The first three-way regulating valve 35 and the second three-way regulating valve 36 are both connected to the hot air supply module 38 through the main connection air port 53, the first three-way regulating valve 35 and the second three-way regulating valve 36 are both connected to the internal circulation air duct 37 through the internally circulated connection air port 52, and the first three-way regulating valve 35 and the second three-way regulating valve 36 are both connected to the high-temperature resistant air inlet pipe 33 and the high-temperature resistant air outlet pipe 34 respectively through the externally circulated connection air port 51. The valve assembly 39 includes a rotating shaft member 391 rotatably connected inside the first three-way regulating valve 35 or the second three-way regulating valve 36, a valve body 392 fixed on the rotating shaft member 391 and capable of covering the externally circulated connection air port 51 or the internally circulated connection air port 52, a cylinder 393 fixedly installed on the bottom plate 10, and a gear-rack transmission assembly 394 drivingly connected between the cylinder 393 and the rotating shaft member 391.

[0033] Arranging the first three-way regulating valve 35, the second three-way regulating valve 36, the internal circulation air duct 37 and the hot air supply module 38 below the bottom plate 10 makes the layout of the entire test system more compact, saves installation space, is especially suitable for production workshops or test sites with space restrictions, and improves the utilization rate of the site. The high-temperature resistant air inlet pipe 33 and the high-temperature resistant air outlet pipe 34 pass through the bottom plate 10 and are connected to the three-way regulating valve, which enhances the structural stability of the system, reduces air leakage and unstable factors caused by pipeline shaking or loose connections, ensures the stable transmission of internal and external circulation airflows, and further improves the stability and reliability of the test system. The valve assembly 39 composed of the cylinder 393, the gear-rack transmission assembly 394, the rotating shaft member 391 and the valve body 392 realizes precise control of the circulation mode switching. The cylinder 393 provides stable power, converts the linear motion into the rotation of the rotating shaft member 391 through the gear-rack transmission assembly 394, and then precisely controls the opening and closing state of the valve body 392, ensuring that the airflows can accurately flow along the set path in different working modes, avoiding problems such as air cross-flow, and improving the working efficiency and reliability of the system.

[0034] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims within the present invention.

Claims

1. A high-temperature test system that maintains the temperature of a circulatory system using an internal and external circulation method, characterized in that It includes a bottom plate (10), a product testing system (20) integrally arranged on the bottom plate (10), and a high-temperature circulation system (30) docked to the product testing system (20). The product testing system (20) includes a testing base (21), a lower needle plate (22) installed on the testing base (21), a product testing board (23) installed on the lower needle plate (22), and a testing press bar fixture (24) docked on the lower needle plate (22) and capable of being opened upward. A testing chamber (25) with open sides on the left and right is formed between the testing press bar fixture (24) and the testing base (21). The high-temperature circulation system (30) includes an air inlet equalizing air module (31), an air outlet equalizing air module (32), a high-temperature resistant air inlet pipe (33), a high-temperature resistant air outlet pipe (34), a first three-way regulating valve (35), a second three-way regulating valve (36), an internal circulation air duct (37), and a hot air supply module (38), where: The air inlet equalizing air module (31), the high-temperature resistant air inlet pipe (33), the first three-way regulating valve (35), the hot air supply module (38), the second three-way regulating valve (36), the high-temperature resistant air outlet pipe (34), and the air outlet equalizing air module (32) are hermetically docked in sequence, and are hermetically docked to both sides of the testing chamber (25) through the air inlet equalizing air module (31) and the air outlet equalizing air module (32) to form an external circulation system; The internal circulation air duct (37) is hermetically connected between the first three-way regulating valve (35) and the second three-way regulating valve (36), so that the internal circulation air duct (37), the first three-way regulating valve (35), the hot air supply module (38), and the second three-way regulating valve (36) form an internal circulation system; Both the first three-way regulating valve (35) and the second three-way regulating valve (36) are provided with valve assemblies (39). The first three-way regulating valve (35) conducts the high-temperature resistant air inlet pipe (33) or the internal circulation air duct (37) through the valve assembly (39), and the second three-way regulating valve (36) conducts the high-temperature resistant air outlet pipe (34) or the internal circulation air duct (37) through the valve assembly (39).

2. The high-temperature test system for maintaining the temperature of the circulation system by using the internal and external circulation modes according to claim 1, characterized in that The testing press bar fixture (24) includes a power connection plate (241), a heat insulation top plate (242) installed at the lower end of the power connection plate (241), an upper needle plate (243) installed at the lower end of the heat insulation top plate (242), heat insulation side plates (244) fixedly connected to the front and rear side positions of the upper needle plate (243), at least one press bar main body (245) installed at the lower end of the upper needle plate (243), and a first guide rod (246) installed at the lower end of the upper needle plate (243). A first guide bearing (247) corresponding to the first guide rod (246) is arranged on the lower needle plate (22). A first sealing strip (248) is arranged at the lower end of the heat insulation side plate (244), and the heat insulation side plate (244) is hermetically docked with the front and rear side positions of the lower needle plate (22) through the sealing strip.

3. A high-temperature test system for maintaining the temperature of a circulation system by using an internal and external circulation method, characterized in that, A second guiding bearing (221) is provided on the lower needle plate (22), a second guiding rod (222) which is docked with the second guiding bearing (221) is provided on the product test plate (23), and a spring member (223) is further provided between the lower needle plate (22) and the product test plate (23).

4. A high-temperature test system for maintaining the temperature of a circulation system by using an internal and external circulation method, as described in any one of claims 1 to 3, characterized in that, The test base (21) includes a heat-insulating electric box (211) fixedly installed on the bottom plate (10), a needle plate connector (212) installed on the side of the heat-insulating electric box (211) and electrically connected to the lower needle plate (22), a sliding seat (213) slidably connected to the bottom plate (10), and a connector plug board (214) provided on the sliding seat (213) and docked with the needle plate connector (212). The connector plug board (214) is directionally docked with or disengaged from the needle plate connector (212) through the sliding fit between the sliding seat (213) and the bottom plate (10), and the lower needle plate (22) is installed at the upper end of the heat-insulating electric box (211).

5. A high-temperature test system for maintaining the temperature of a circulation system by using an internal and external circulation method, characterized in that, Both the air inlet equalizing air module (31) and the air outlet equalizing air module (32) include a transverse driving force unit (41) and a heat-insulating equalizing air box (42) power-connected to the transverse driving force unit (41). An equalizing air outlet (43) is provided on one side of the heat-insulating equalizing air box (42), and a second sealing strip (44) is provided at the edge of the heat-insulating equalizing air box (42) corresponding to the equalizing air outlet (43). The transverse driving force unit (41) is used to drive the heat-insulating equalizing air box (42) so that the equalizing air outlet (43) is docked with or disengaged from the test chamber (25), and is sealed by the second sealing strip (44) when the equalizing air outlet (43) is docked with the test chamber (25). A side air outlet (45) is provided on the other side of the heat-insulating equalizing air box (42) perpendicular to the equalizing air outlet (43). Both the high-temperature resistant air inlet pipe (33) and the high-temperature resistant air outlet pipe (34) are set as stretchable pipe structures adapted to the moving stroke of the heat-insulating equalizing air box (42). The heat-insulating equalizing air box (42) of the air inlet equalizing air module (31) is connected to the high-temperature resistant air inlet pipe (33) through the side air outlet (45), and the heat-insulating equalizing air box (42) of the air outlet equalizing air module (32) is connected to the high-temperature resistant air outlet pipe (34) through the side air outlet (45).

6. The high-temperature test system for maintaining the temperature of the circulation system by using the internal and external circulation modes according to claim 5, characterized in that, An equalizing air plate (46) is provided inside the heat-insulating equalizing air box (42). In the air inlet equalizing air module (31), the heat-insulating equalizing air box (42) evenly blows out the hot air blown in from the side air outlet (45) through the equalizing air plate (46) from the equalizing air outlet (43).

7. A high-temperature test system for maintaining the temperature of a circulation system by using an internal and external circulation method, characterized in that, The first three-way regulating valve (35), the second three-way regulating valve (36), the internal circulation air duct (37) and the hot air supply module (38) are all provided below the bottom plate (10). Both the high-temperature resistant air inlet pipe (33) and the high-temperature resistant air outlet pipe (34) pass through the bottom plate (10) and are respectively connected to the first three-way regulating valve (35) and the second three-way regulating valve (36).

8. A high-temperature test system for maintaining the temperature of a circulation system by using an internal and external circulation method, characterized in that, The first three-way regulating valve (35) and the second three-way regulating valve (36) are both provided with an external circulation connecting air port (51), an internal circulation connecting air port (52) and a main connecting air port (53) which are interconnected. The first three-way regulating valve (35) and the second three-way regulating valve (36) are both connected to the hot air supply module (38) via the main connecting air port (53). The first three-way regulating valve (35) and the second three-way regulating valve (36) are both connected to the internal circulation air duct (37) via the internal circulation connecting air port (52). The first three-way regulating valve (35) and the second three-way regulating valve (36) are both connected to the high temperature resistant air inlet duct (33) and the high temperature resistant air outlet duct (34) respectively via the external circulation connecting air port (51).

9. A high-temperature test system for maintaining the temperature of a circulation system by means of an internal and external circulation method, characterized in that, The valve assembly (39) comprises a rotating shaft (391) rotatably connected to the inside of the first three-way regulating valve (35) or the second three-way regulating valve (36), a valve body (392) fixed on the rotating shaft (391) and capable of covering the external circulation connecting air port (51) or the internal circulation connecting air port (52), a cylinder (393) fixedly mounted on the base plate (10), and a gear rack transmission assembly (394) transmission-connected between the cylinder (393) and the rotating shaft (391).

Images