HAST test device

Abstract

The utility model discloses a HAST test device, and relates to the technical field of test equipment. The HAST test device comprises a test box system, a test environment regulation and control system and a control system, wherein the test environment regulation and control system is electrically connected with the control system; the test box system comprises a box body, a storage rack and a fan, the storage rack and the test environment regulation and control system are both arranged in the box body, a sealed cavity is formed in the box body, and the fan is used for driving gas in the box body to flow. The HAST test device is provided with the box body, a test is carried out in the box body, the box body is internally provided with a sealed cavity, and the fan is additionally arranged, so that airflow in the box body can be disturbed, circulation of gas in the box body can be accelerated, local high-low-temperature or high-low-humidity air is accelerated to diffuse to the periphery, the temperature and humidity balance speed in the box body is increased, and the service life of the HAST test device is prolonged. Therefore, test time cost is saved, and test efficiency is improved. By additionally arranging the dust removal plate, the dust removal effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a HAST testing device. Background Technology

[0002] HAST (Highly Accelerated Temperature and Humidity Stress Testing) equipment is an instrument used for rapid accelerated aging and reliability testing, primarily for environmental stress testing of electronic components and circuit boards. It assesses the long-term reliability and durability of test samples by subjecting them to high temperature (≥85℃), high humidity (≥85%RH), and high pressure (1-3 atmospheres). It is widely used in semiconductor, aerospace, machinery, and medical device industries, rapidly simulating the environmental stresses of products in real-world use through precisely controlled extreme conditions, thus identifying potential defects and problems in the test samples.

[0003] Currently, the common HAST test equipment on the market has the following problems: The control device for adjusting test environment parameters such as temperature and humidity is installed in a specific location in the HAST test equipment. The temperature and humidity consistency of the entire test space is poor, and it takes a long time to reach the temperature and humidity balance of the entire test space. In addition, in order to ensure the airtightness of the test chamber, only one exhaust valve is installed in the chamber. The thermal balance is slow after the test, which will increase the test time cost and affect the test efficiency.

[0004] Therefore, how to improve experimental efficiency is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a HAST testing device that can improve testing efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A HAST testing device includes a test chamber system, a test environment control system, and a control system. The test environment control system is electrically connected to the control system. The test chamber system includes a chamber, a shelf, and a fan. The shelf and the test environment control system are both located inside the chamber. The chamber is a sealed cavity, and the fan is used to drive the gas flow inside the chamber.

[0008] Preferably, the test environment control system includes a first heating device, which is located at the air outlet of the fan inside the chamber.

[0009] Preferably, the fan includes a rotary driver and fan blades connected to the output shaft of the rotary driver. The fan blades are built into the housing, the rotary driver is external to the housing, and the output shaft rotates and seals the mounting hole connected to the housing.

[0010] Preferably, the output shaft is rotatably connected to the mounting hole via a bearing; a first sealing ring and / or sealing oil are provided between the bearing and the output shaft; and / or, sealing oil and / or a threaded locking structure are provided between the bearing and the mounting hole.

[0011] Preferably, the test chamber system further includes a sealing cover fixed to the outside of the chamber, the sealing cover being rotatably sleeved on the output shaft and covering the mounting hole; the space between the sealing cover and the chamber is also filled with external sealing oil.

[0012] Preferably, the test chamber system further includes a sealing cover fixed to the outside of the chamber, the output shaft being rotatably inserted into the sealing cover, and the sealing cover covering the mounting hole; one of the sides of the sealing cover facing the chamber and the side of the chamber facing the sealing cover is provided with an annular connecting protrusion, and the other is provided with an annular connecting groove; the surface of the connecting groove and / or the connecting protrusion is provided with a sealing layer; the connecting protrusion and the connecting groove are inserted into each other; and the mounting hole is located on the radially inner side of the connecting protrusion and the connecting groove.

[0013] Preferably, the test chamber system further includes an exhaust valve and a safety valve disposed on the chamber body.

[0014] Preferably, the outer side of the shelf is provided with a dust removal structure, and air can enter and exit the shelf through the dust removal structure.

[0015] Preferably, a water tank is also provided on the bottom surface of the box body, the water tank is connected to a water supply device, and a second heating device is provided in the water tank.

[0016] Preferably, the test environment control system further includes a dry-bulb and wet-bulb thermometer located above the water tank, and an electronic thermometer and hygrometer located inside the shelf.

[0017] The HAST testing device provided by this utility model includes a test chamber system, a test environment control system, and a control system. The test environment control system is electrically connected to the control system. The test chamber system includes a chamber, a shelf, and a fan. The shelf and the test environment control system are both located inside the chamber, which is a sealed cavity. The fan is used to drive the gas flow inside the chamber.

[0018] This HAST testing device has a chamber in which the test is conducted. The chamber is a sealed cavity with a dust removal effect. In addition, the addition of a fan can agitate the airflow inside the chamber, which can accelerate the circulation of the gas inside the chamber. This allows local high or low temperature or high or low humidity air to diffuse more quickly to the surrounding area, accelerating the circulation of the gas inside the chamber and increasing the speed at which the temperature and humidity balances within the chamber. This saves testing time and costs and improves testing efficiency.

[0019] In a preferred embodiment, the outer side of the shelf is provided with a dust removal structure. When the gas passes through the dust removal structure, dust removal can be performed, thereby comprehensively removing dust from the environment inside the chamber. The addition of a dust removal plate can meet the requirements of test samples with high cleanliness requirements and satisfy the high cleanliness requirements of the test chamber inside the chamber. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 A simplified diagram of a specific embodiment of the HAST testing device provided by this utility model;

[0022] Figure 2 A structural diagram showing the hidden door of a specific embodiment of the HAST testing device provided by this utility model;

[0023] Figure 3 An exploded view of the assembly of the housing and the fan in a specific embodiment of the HAST test device provided by this utility model;

[0024] Figure 4 A side view of the shelf in a specific embodiment of the HAST testing device provided by this utility model;

[0025] Figure 5 An isometric view of the shelf in a specific embodiment of the HAST testing device provided by this utility model;

[0026] Figure 6 This is a diagram showing the internal structure of the housing of a specific embodiment of the HAST testing device provided by this utility model.

[0027] Figure label:

[0028] Aging board socket 1;

[0029] Shelf 2, dust removal structure 21, dust removal film 211, frame 212, slide rail 22;

[0030] Fan 3, rotary driver 31, output shaft 311, fan blade 32, bearing 33, first screw 34;

[0031] Box body 4, mounting hole 41, box door 42, connecting groove 43, first sealing ring 44, external sealing oil 45, exhaust valve 46, safety valve 47, sealing layer 48, sealing convex ring 49;

[0032] Water tank 5, second heating device 51, wet and dry bulb thermometer 52, water level gauge 53, wastewater tank 54, inlet tank 55, water pump 56, water valve 57;

[0033] First heating device 6, electronic thermometer and hygrometer 61;

[0034] Sealing cap 7, second sealing ring 71, connecting protrusion 72, second screw 73, sealing ring groove 74;

[0035] Industrial PC 8, Power Supply 81. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] The core of this invention is to provide a HAST testing device that can improve testing efficiency.

[0038] The HAST testing device provided by this invention can be used as a high-temperature, high-humidity, high-pressure reverse-polarity life testing device. Please refer to the specific embodiment one. Figures 1 to 6 The system includes a test chamber system, a test environment control system, and a control system. The test environment control system is electrically connected to the control system. Specifically, the electrical control components in both the test chamber system and the test environment control system can be electrically connected to the control system for unified control. The test environment control system includes a heating and humidification system and a monitoring system. The heating and humidification system is used to regulate the temperature and humidity in the test environment, while the monitoring system is used to monitor the temperature and humidity in the test environment.

[0039] Test chamber systems are primarily used to provide a high-temperature, high-humidity, and high-pressure environment for test samples. For example... Figure 1 and Figure 2 As shown, the test chamber system includes a chamber 4, a shelf 2, and a fan 3. The shelf 2 and the test environment control system are both located inside the chamber 4.

[0040] like Figure 2 As shown, chamber 4 primarily provides a controllable testing environment for the test specimens. The interior of chamber 4 is a sealed cavity, placing the test specimens within a set temperature, humidity, and pressure environment while isolating them from external temperature, humidity, and contaminants, ensuring the accuracy and repeatability of the test. Fan 3 is used to drive the gas flow within chamber 4.

[0041] like Figure 5 As shown, the shelf 2 is mainly used to place aging plates containing test samples. The shelf 2 may have one or more open supports for placing the aging plates through the openings, ensuring that the space on the shelf 2 where the test samples are placed is connected to the test environment inside the chamber 1 and is under the environmental conditions provided by the test environment control system. The shelf 2 may be equipped with a positioning structure to position the aging plates.

[0042] This HAST test apparatus has a chamber 4, and the test is carried out inside the chamber 4. The chamber 4 is a sealed cavity, which makes the test effective in removing dust. In addition, the addition of a fan 3 can disturb the airflow inside the chamber 4, which can accelerate the circulation of the gas inside the chamber 4. This allows the local high or low temperature or high or low humidity air to diffuse to the surrounding area more quickly, accelerating the circulation of the gas inside the chamber 4 and increasing the speed of temperature and humidity balance inside the chamber 4. This saves test time and costs and improves test efficiency.

[0043] To further improve the rate of temperature equilibrium, such as Figure 1 and Figure 6 As shown, the heating and humidifying system includes a first heating device 6, which is located at the air outlet of the fan 3 inside the housing 4. Therefore, the fan 3 effectively blows air directly onto the first heating device 6 inside the housing 4. The fan 3 supplies air into the housing 4 through its air outlet. Specifically, the first heating device 6 can be a resistance heater or an infrared heater.

[0044] At this time, the first heating device 6 serves as the heat source for regulating the temperature of the test environment inside the chamber 4. Given the significant temperature differences at different locations within the chamber 4 due to factors such as distance from the heat source, the airflow provided by the fan 3 is directly directed towards the first heating device 6. This directs and diffuses the hot air generated by the first heating device 6 to every corner of the chamber 4, ensuring that the test sample remains in a uniform temperature environment throughout the entire test. Furthermore, during the cooling process after the test, the fan 3 can be activated to circulate air within the chamber 4, promoting rapid cooling and saving experimental time.

[0045] When installing fan 3, if Figure 1 and Figure 3As shown, a mounting hole 41 is provided on the housing 4. The fan 3 includes a rotary driver 31 and a fan blade 32 connected to the output shaft 311 of the rotary driver 31. The rotary driver 31 is specifically a motor, and the output shaft 311 can specifically be a screw. The fan blade 32 is built into the housing 4, the rotary driver 31 is externally located in the housing 4, and the output shaft 311 rotates and is sealed to the mounting hole 41 of the housing 4. The rotary driver 31 drives the fan blade 32 to rotate through its output shaft 311, which can promote airflow inside the housing 4.

[0046] Specifically, the mounting hole 41 can be formed on the side wall of the housing 4. During installation, the main body of the rotary drive 31 is located on the outside of the housing 4, and its output shaft 311 extends into the housing 4 through the mounting hole 41 on the side wall of the housing 4. The fan blade 32 is fastened to the axial end face of the output shaft 311 by the first screw 34. In addition, the housing 4 also has a door 42, which can be set on two opposite side walls of the housing 4 along with the mounting hole 41. Of course, in other embodiments, it can also be formed on the top wall of the housing 4.

[0047] Since the test chamber 4 will be exposed to high temperature, high humidity and high pressure environment, placing the rotary driver 31 outside the chamber 4 and the fan blade 32 inside the chamber 4 helps to extend the service life of the rotary driver 31.

[0048] Specifically, the first heating device 6 can be set between the shelf 2 and the air outlet of the fan 3 on the housing 4, and can be arranged sequentially along the axial direction of the output shaft 311 to ensure that the heat reaches the shelf 2 as quickly as possible. In addition, when the fan blade 32 is built into the housing 4, the air outlet of the fan blade 32 is the air outlet of the fan 3 in the housing 4.

[0049] Since the output shaft 311 penetrating the housing 4 may cause poor airtightness of the housing 4, to ensure the sealing of the connection between the output shaft 311 and the mounting hole 41, prevent air leakage from the housing 4, maintain good airtightness inside the housing 4, and ensure the high-temperature, high-humidity, and high-pressure test environment inside the housing 4, different areas between the output shaft 311 and the mounting hole 41 can be sealed. In this embodiment, various sealing methods are used to ensure the sealing effect between the output shaft 311 and the mounting hole 41. In other embodiments, only some of these sealing methods may be used.

[0050] Specifically, such as Figure 3As shown, the output shaft 311 is rotatably connected to the mounting hole 41 via the bearing 33. On the inner radial side of the bearing 33, a first sealing ring 44, specifically sealing rubber, is provided between the bearing 33 and the output shaft 311. Sealing oil can also be filled between the bearing 33 and the first sealing ring 44 and / or between the first sealing ring 44 and the output shaft 311. The sealing oil also provides lubrication, ensuring smooth rotation of the relatively rotatable parts and providing a sealing effect. On the outer radial side of the bearing 33, a threaded locking structure is provided between the bearing 33 and the mounting hole 41. The outer circumferential surface of the bearing 33 and the wall of the mounting hole 41 are both threaded. The external thread of the bearing 33 is screwed into and fixed to the internal thread of the mounting hole 41, forming a threaded locking structure with a sealing effect. Furthermore, sealing oil 45 can also be filled between the internal thread of the mounting hole 41 and the external thread of the bearing 33 in the threaded locking structure to improve the sealing effect.

[0051] Specifically, such as Figure 3 As shown, the test chamber system also includes a sealing cover 7 fixed to the outside of the chamber body 4. The output shaft 311 is rotatably inserted into the sealing cover 7, which covers the mounting hole 41 and can block the sealing mounting hole 41 from being exposed to the opening of the chamber body 4.

[0052] Among them, such as Figure 3 As shown, an annular connecting protrusion 72 is provided on the side of the sealing cover 7 facing the housing 4, and an annular connecting groove 43 is provided on the side of the housing 4 facing the sealing cover 7. A sealing layer 48 is provided on the surface of the connecting groove 43. The connecting protrusion 72 and the connecting groove 43 are inserted into each other. The sealing layer is specifically a sealing rubber layer built into the connecting groove 43. The sealing rubber layer has a groove for inserting the connecting protrusion 72. The sealing insertion is achieved through the sealing layer 48. The mounting hole 41 is located on the inner side of the connecting protrusion 72 and the connecting groove 43 in the radial direction. Through the insertion of the connecting protrusion 72 and the connecting groove 43, the path of gas leakage and sealing oil leakage in the housing 4 is extended, further ensuring the airtightness of the connection between the output shaft 311 and the housing 4.

[0053] At this time, in the radial direction of the output shaft 311, multiple connecting grooves 43 are arranged sequentially in a direction away from the output shaft 311 to form a collar structure, and connecting protrusions 72 are arranged to cooperate with each connecting groove 43 and are inserted into it one by one. Of course, in other embodiments, the connecting grooves 43 can also be arranged on the sealing cover 7, and the connecting protrusions 72 can be arranged on the housing 4.

[0054] The sealing cover 7, facing the housing 4, has a sealing ring groove 74 fitted onto the outside of the output shaft 311. A second sealing ring 71 is installed in the sealing ring groove 74. The edge of the mounting hole 41 forms a sealing protrusion 49 protruding from the outer surface of the housing 4. The sealing protrusion 49 is inserted into the sealing ring groove 74, and the second sealing ring 71 provides a seal, further improving the sealing performance at the output shaft 311. The second sealing ring is specifically a sealing rubber ring. Figure 3 As shown, in the current state, after the sealing cover 7 is moved to the right and the sealing ring 49 and sealing ring groove 74, and the connecting protrusion 72 and connecting groove 43 are inserted, the assembly and sealing of the sealing cover 7 is completed.

[0055] The sealing cover 7 and the housing 4 are further filled with external sealing oil 45 to improve the sealing effect. Specifically, the external sealing oil 45 fills the gap between the sealing cover 7 and the outer surface of the side wall near the mounting hole 41 on the housing 4 to prevent gas inside the housing 4 from leaking out through the gap in the output shaft 311. In addition, the sealing cover 7 can be tightly fixed to the housing 4 with screws 73.

[0056] Of course, in other embodiments, the fan 3 can also be completely external to the housing 4. In this case, the fan 3 can be connected to a duct, which is located on the air hole of the housing 4 or extends into the housing 4. In this case, the air outlet of the duct is the air supply port of the fan 3 in the housing 4.

[0057] To improve test safety, in the test chamber system, such as Figure 1 and Figure 2 As shown, the chamber also includes an exhaust valve 46 and a safety valve 47 located on the chamber 4. The exhaust valve 46 dissipates excess heat and water vapor, preventing overheating inside the chamber and protecting the equipment and samples. The safety valve 47 plays a crucial role in ensuring the safety of the equipment and operators. As the HAST testing device is a high-pressure device, when the internal pressure of the chamber 4 exceeds the set safety value, the safety valve 47 will automatically open to release the excessive pressure, preventing the chamber from exploding or experiencing other accidents due to excessive pressure.

[0058] On shelf 2, such as Figure 4 and Figure 5 As shown, a dust removal structure 21 is provided on the outer side of the shelf 2. It should be noted that air can enter and exit the shelf 2 through the dust removal structure 21, ensuring that the installation of the dust removal structure 21 does not affect normal testing. Dust removal is performed when gas passes through the dust removal structure 21, thereby enabling comprehensive dust removal of the environment inside the chamber 4.

[0059] Specifically, the dust removal structure 21 includes dust removal plates. To ensure the reliability of dust removal, dust removal plates can be installed on all surfaces of the shelf 2, or dust removal plates can be installed at the openings of all surfaces of the shelf 2 with openings, for example... Figure 5As shown, the shelf 2 has six sides. The figure only illustrates the situation where some sides are equipped with dust removal plates. In actual applications, after the aging board is placed in the shelf 2, dust removal plates are installed on all six sides. The dust removal plates can absorb dust particles in the air and prevent them from entering the shelf 2. Of course, in other embodiments, a dust removal structure can also be selected to cover part of the surface of the shelf 2 as needed.

[0060] Specifically, such as Figure 5 As shown, the dust removal plate includes a frame 212 and a dust removal membrane 211 disposed within the frame 212. The dust removal membrane 211 is specifically a PDMS film (silicone rubber film), which can adsorb dust particles in the air without undergoing chemical changes under HAST test conditions. Furthermore, the PDMS film is designed as a porous film to reduce boundary layer effects. When the fan 3 drives the air circulation within the chamber 4, the gas passes through the dust removal plate for filtration and dust removal, thereby comprehensively removing dust from the environment inside the chamber 4, achieving cleanliness of the interior of the chamber 4, ensuring cleanliness during the test, and guaranteeing stable test operation. Alternatively, in other embodiments, the dust removal structure 21 may only include the dust removal membrane, which can be directly wrapped around the outside of the shelf 2 without a frame 212.

[0061] Specifically, since the dust removal membrane 211 is a consumable, it can be fixed to the frame 212 with bolts during installation, allowing for quick replacement of the dust removal membrane 211. In other embodiments, the dust removal membrane 211 can also be glued or bound to the frame 212.

[0062] Specifically, to facilitate the installation of frame 212, such as Figure 5 As shown, a slide rail 22 can be provided on the shelf 2, and the frame 212 is slidably connected to the slide rail 22. Of course, in other embodiments, a dust removal plate can also be directly fixed to the shelf 2 with screws.

[0063] In the environmental control system, the heating and humidification system is used to regulate the temperature and humidity inside the chamber 4, and includes a heating module and a humidification module. The heating module includes a first heating device 6, and the humidification module includes a water tank 5, a water supply device, and a second heating device 51.

[0064] Specifically, in the humidification module, such as Figure 1 and Figure 6As shown, a water tank 5 is installed on the bottom surface inside the chamber 4, and a water supply device is connected to the water tank 5. A second heating device 51 is installed inside the water tank 5. The second heating device 51 is used to heat the water in the water tank 5 to evaporate it, and can be an alloy heating wire or a resistance heating wire. When the test is started, the humidity inside the test chamber can be rapidly increased by heating the second heating device 51 in the water tank 5. At this time, the humidifying water source is moved inside the chamber 4. Compared with the traditional HAST chamber 4 solution with an external humidifier, the water vapor transmission path is shortened, which effectively increases the rate of humidity rise inside the chamber 4 and improves the test efficiency.

[0065] Specifically, in water supply devices, such as Figure 1 As shown, it includes a water valve 57, a first pipeline, a water pump 56, an inlet tank 55, a second pipeline, and a wastewater tank 54. The side and bottom walls of the water tank 5 are connected to the water valve 57. To allow water inflow, the side wall of the water tank 5 is connected to the water pump 56 via the first pipeline, on which the water valve 57 is installed. The water pump 56 is connected to the inlet tank 55. The water pump 56 and the inlet tank 55 are located outside the housing 4. The first pipeline passes through the housing 4 and seals the through hole on the housing 4. Water conforming to the HAST test is drawn from the inlet tank 55 into the water tank 5 inside the housing 4 by the water pump 56. To allow drainage, the water tank 5 is also connected to the wastewater tank 54 via the second pipeline, on which the water valve 57 is installed. The second pipeline passes through the housing 4 and seals the through hole on the housing 4. The wastewater tank 54 is located outside the housing 4 and is used for drainage and rapid dehumidification after subsequent tests. At this time, the outlet of the exhaust valve 46 can also be connected to the wastewater tank 54.

[0066] Specifically, a water level gauge 53 is installed inside the water tank 5 to monitor the water level. The water level gauge 53 and the water pump 56 are electrically connected to the control system. When the water level falls below a set threshold, the water pump 56 is triggered to pump water again to replenish the water level in the water tank 5.

[0067] The monitoring system is used to monitor the test environment conditions inside chamber 4 in real time. The monitoring system includes an electronic thermometer and hygrometer 61 and a wet-bulb and dry-bulb thermometer 52, which are used to detect temperature or humidity to improve the accuracy of monitoring.

[0068] Specifically, an electronic thermometer and hygrometer 6 is installed inside the shelf 2. The electronic thermometer and hygrometer 6 can measure the temperature and humidity inside the cabinet 4 in real time, providing accurate data so that the control system can adjust heating and humidification in a timely manner to ensure that the temperature is maintained within the set range. In addition, the electronic thermometer and hygrometer 6 is located in the upper part of the cabinet 4, specifically, one end can be connected to the cabinet 4 and the other end can extend into the top of the shelf 2.

[0069] Specifically, such as Figure 1As shown, a wet-bulb and dry-bulb thermometer 52 is installed above the water tank 5. The wet-bulb and dry-bulb thermometer 52 includes a first thermometer and a second thermometer. Gauze is placed on the first thermometer and immersed in the water in the water tank 5. The second thermometer is placed outside the water tank 5 at the same height as the first thermometer. The wet-bulb and dry-bulb thermometer 52 is used to implement the wet-bulb and dry-bulb humidity measurement method. It can accurately measure the humidity outside the shelf 2 and can also obtain the temperature through the thermometer inside. At this time, the electronic thermometer and hygrometer 61 is placed on the upper part of the chamber 4, and the wet-bulb and dry-bulb thermometer 52 is placed on the lower part of the chamber 4. This can help determine the temperature and humidity distribution inside the chamber 4, ensuring a uniform temperature and humidity distribution within the test chamber and avoiding temperature and humidity overshoot.

[0070] The control system is responsible for the overall management and coordination of other systems within the HAST device, recording and storing all data during the testing process. For example... Figure 1 As shown, the control system includes an industrial computer 8 and a power supply 81.

[0071] The industrial computer 8 is responsible for the overall system control, data acquisition, and monitoring. Connected to and cooperating with the electronic thermometer and hygrometer 61, the wet-bulb and dry-bulb thermometer 52, and the heating and humidification system, the industrial computer 8 adjusts and controls the temperature and humidity inside the chamber 4 in real time to ensure the testing environment meets the set conditions. Other sensors can also be installed inside the chamber 4. The industrial computer 8 connects to various temperature, humidity, and pressure sensors to collect data in real time during the testing process, ensuring the completeness and accuracy of the data.

[0072] Power supply 81 provides the necessary power to all electrical equipment in the test sample and test apparatus, including the first heating device 6, the second heating device 51, the humidification module, the fan 3, other structures and sensors in the control system, etc. Power supply 81 is specifically a DC power supply.

[0073] The test chamber system also includes an aging board socket 1 that is electrically connected to the power supply 81. The aging board is electrically connected to the power supply 81 through the aging board socket 1 to ensure that the aging board can work normally during the test. The host computer can collect and record the performance data of the aging board and related components or circuit boards in real time during the test, which helps to analyze its behavior and reliability under high stress conditions.

[0074] The experimental apparatus in this embodiment has the following workflow: After starting the test, the fan 3 is first started to circulate air inside the chamber 4, so that the dust removal plate can adsorb more particulate matter and achieve a relatively clean environment inside the chamber 4; the heating and humidification system is started to achieve the preset temperature and humidity environment inside the chamber 4; the electronic thermometer and hygrometer 61 and the dry-bulb and wet-bulb thermometer 52 monitor the uniformity of temperature and humidity inside the chamber 4, and the start and stop of the fan 3 can be judged and / or controlled based on the uniformity to achieve a balanced temperature and humidity inside the chamber 4. After the test is completed, the fan 3 and the exhaust valve 46 are turned on, and air flow is formed inside the chamber 4 to accelerate the cooling inside the fan 3.

[0075] It should be noted that when an element is referred to as "fixing" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as "connecting" another element, it can be directly connected to the other element or there may be an intervening element. Furthermore, in the description of this utility model, unless otherwise stated, "multiple," "multiple roots," and "multiple groups" mean two or more.

[0076] The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0078] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0079] The HAST testing device provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A HAST experimental apparatus, characterized in that, The test chamber system includes a test environment control system and a control system. The test environment control system is electrically connected to the control system. The test chamber system includes a chamber (4), a shelf (2) and a fan (3). The shelf (2) and the test environment control system are both located inside the chamber (4). The chamber (4) is a sealed cavity. The fan (3) is used to drive the gas flow inside the chamber (4).

2. The HAST testing apparatus according to claim 1, characterized in that, The test environment control system includes a first heating device (6), which is located at the air outlet of the fan (3) inside the box (4).

3. The HAST testing apparatus according to claim 1, characterized in that, The fan (3) includes a rotary driver (31) and a fan blade (32) connected to the output shaft (311) of the rotary driver (31). The fan blade (32) is built into the housing (4). The rotary driver (31) is placed outside the housing (4). The output shaft (311) rotates and is sealed to the mounting hole (41) of the housing (4).

4. The HAST testing apparatus according to claim 3, characterized in that, The output shaft (311) is rotatably connected to the mounting hole (41) via a bearing (33). A first sealing ring (44) and / or sealing oil are provided between the bearing (33) and the output shaft (311); and / or, sealing oil and / or a threaded locking structure are provided between the bearing (33) and the mounting hole (41).

5. The HAST testing apparatus according to claim 3, characterized in that, The test chamber system also includes a sealing cover (7) fixed outside the chamber (4), the sealing cover (7) being rotatably sleeved on the output shaft (311) and covering the mounting hole (41); the sealing cover (7) and the chamber (4) are also filled with external sealing oil (45).

6. The HAST testing apparatus according to claim 3, characterized in that, The test chamber system also includes a sealing cover (7) fixed outside the chamber (4), the output shaft (311) is rotatably inserted into the sealing cover (7), and the sealing cover (7) covers the mounting hole (41). Of the two sides of the sealing cover (7) facing the box body (4) and the side of the box body (4) facing the sealing cover (7), one side is provided with an annular connecting protrusion (72), and the other side is provided with an annular connecting groove (43). A sealing layer (48) is provided on the surface of the connecting groove (43) and / or the connecting protrusion (72). The connecting protrusion (72) and the connecting groove (43) are inserted into each other. The mounting hole (41) is located on the inner side of the connecting protrusion (72) and the connecting groove (43) in the radial direction.

7. The HAST testing apparatus according to any one of claims 1 to 6, characterized in that, The test chamber system also includes an exhaust valve (46) and a safety valve (47) located on the chamber body (4).

8. The HAST testing apparatus according to any one of claims 1 to 6, characterized in that, The outer side of the shelf (2) is provided with a dust removal structure (21), and air can enter and exit the shelf (2) through the dust removal structure (21).

9. The HAST testing apparatus according to any one of claims 1 to 6, characterized in that, A water tank (5) is also provided on the bottom surface inside the box (4). The water tank (5) is connected to a water supply device, and a second heating device (51) is provided inside the water tank (5).

10. The HAST testing apparatus according to claim 9, characterized in that, The test environment control system also includes a wet and dry bulb thermometer (52) located above the water tank (5) and an electronic thermometer and hygrometer (61) located in the shelf (2).

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