A BIT aging test cabinet

Abstract

This utility model relates to a BIT aging test cabinet, comprising a cabinet shell and a hinged door. An observation window is provided on the front of the door. A drive motor is installed on the outer top of the cabinet shell and connected to a central heat exchanger at the top of the inner cavity. Bidirectional lead screws are symmetrically arranged on both sides of the inner cavity, with their top ends coaxially connected to the drive motor and their bottom ends forming a synchronous transmission mechanism via pulleys and a transmission belt. Shelves are arranged at the top and bottom of the inner cavity, with each shelf sleeved onto the surface of the bidirectional lead screws for vertical lifting adjustment. Each shelf integrates a temperature sensor and an independent power supply. A heat dissipation hole is opened in the center of the inner cavity, and a cooling fan is built-in. A flow guide seat is provided at the top of the inner cavity, with its bottom conical flow guide channel corresponding to the air outlet of the heat exchanger. A condensate collection concave plate is arranged below. A multi-channel data acquisition card is installed on the back. This utility model achieves stepless shelf adjustment through a bidirectional lead screw transmission system, adapting to test equipment of different sizes.

Description

Technical Field

[0001] This utility model relates to the field of test cabinets, specifically to a BIT aging test cabinet. Background Technology

[0002] BIT (Bipolar In-Test) aging test cabinets belong to the field of electronic equipment reliability testing, primarily used for verifying the long-term operational stability of semiconductor devices, integrated circuits, and other products in high-temperature environments. These test equipment must simultaneously meet the compatibility requirements of test components of different specifications and ensure the uniformity of temperature field distribution and thermal management efficiency during testing to guarantee the accuracy and repeatability of test results. Traditional aging test equipment often faces a technical contradiction in its structural design, making it difficult to balance space utilization and heat dissipation efficiency, thus limiting the equipment's adaptability to diverse testing scenarios.

[0003] Existing aging test cabinets often employ manual or segmented mechanical shelf adjustment mechanisms, making continuous stepless height adjustment difficult. This results in significant redundant space during the testing of small components, while large test pieces are limited by fixed shelf heights and cannot be vertically expanded. Regarding thermal management, traditional external ventilation solutions typically rely on unidirectional airflow organization. Due to the lack of vertical airflow guidance structures, hot air inside the cabinet easily forms turbulence in the top area, directly mixing with the low-temperature intake air. This causes localized overheating areas and short-circuiting of hot and cold airflows, severely weakening the actual effectiveness of the heat dissipation system. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned deficiencies and provide a BIT aging test cabinet that adopts a modular shelf design, a multi-channel data acquisition card, and a heat exchanger, thereby solving the technical problem that existing technologies cannot meet the needs of the modern electronics industry for high-density, multi-type equipment mixed testing.

[0005] The objective of this utility model is achieved through the following means:

[0006] A BIT aging test cabinet includes a cabinet shell and a cabinet door. The cabinet door is hinged to the cabinet shell. Shelves are installed on the upper and lower parts of the inner cavity of the cabinet shell. An observation window is installed on the front of the cabinet door. A heat exchanger and a drive motor are installed on the top center and outer side of the cabinet shell, respectively. Bidirectional lead screws are rotatably connected to both sides of the inner cavity of the cabinet shell. The top of the bidirectional lead screws is coaxially connected to the drive motor. Pulleys are installed on the bottom of the bidirectional lead screws. A transmission belt is installed between the pulleys. Shelves are sleeved and connected to the upper and lower surfaces of the bidirectional lead screws, respectively. A multi-channel data acquisition card is installed on the back of the inner cavity of the cabinet shell. Temperature sensors and independent power supplies are installed on the upper surface of the shelves.

[0007] A heat dissipation hole is provided in the center of the inner cavity of the shelf, and a cooling fan is installed inside the cavity of the heat dissipation hole. A flow guide seat is added to the top of the inner cavity of the cabinet shell, and a tapered flow guide channel is provided at the bottom of the flow guide seat. The flow guide seat is positioned corresponding to the bottom end of the heat exchanger, and a collection concave plate is added below the flow guide seat. A drive motor drives a bidirectional lead screw to rotate, and the transmission connection between the pulley and the drive belt enables the upper and lower sets of bidirectional lead screws to rotate synchronously, driving the shelf sleeved on the surface of the bidirectional lead screw to move in the vertical direction. The shelf spacing is adjusted according to the size requirements of the module under test to complete the test chamber space configuration.

[0008] After the heat exchanger is started, the regulated airflow is vertically delivered downwards to the test chamber through the conical guide channel at the bottom of the guide seat. The cooling fan inside the shelf cavity forms a horizontal airflow supplement through the heat dissipation holes. An independent power supply provides independent power to the modules under test on each shelf. Temperature sensors monitor the temperature parameters of the shelf area in real time. A multi-channel data acquisition card synchronously receives all sensor signals and electrical performance data of the modules under test. The test data is recorded in a time sequence through a preset algorithm. During the temperature alternation test, the condensate generated on the surface of the guide seat flows along the conical guide channel to the collecting concave plate. The condensate on the surface of the collecting concave plate is guided into the collecting concave plate along the inclined guide surface to avoid liquid dripping and interfering with the test environment.

[0009] Furthermore, the drive motor is connected to the cabinet housing via a motor mount, and the drive motor is coaxially connected to the top of the corresponding bidirectional lead screw.

[0010] The drive motor is rigidly connected to the cabinet housing via the motor base. When the drive motor starts, its output shaft drives the coaxially connected bidirectional lead screw to rotate. Through the helical transmission of the bidirectional thread on the surface of the bidirectional lead screw, the shelf sleeved on the surface of the bidirectional lead screw is driven to move up and down in the vertical direction.

[0011] Furthermore, partition mesh plates are installed at the top and bottom of the heat dissipation holes, and the cooling fan and temperature sensor are connected to their respective independent power supplies via wiring.

[0012] The partition mesh inside the heat dissipation hole forms a filtering barrier for the airflow. Independent power supplies power the cooling fan and temperature sensor respectively through preset circuits. When the cooling fan is running, it drives the airflow to pass through the heat dissipation hole after being filtered by the partition mesh. The temperature sensor simultaneously collects the surface temperature data of the shelf.

[0013] Furthermore, a limiting groove and a positioning groove are respectively opened on both sides of the inner wall of the cabinet shell, and a limiting protrusion and a positioning protrusion are slidably connected in the inner cavity of the limiting groove and the positioning groove, respectively.

[0014] The limiting protrusion moves along the limiting groove, and the positioning protrusion moves along the positioning groove.

[0015] Furthermore, the limiting protrusion is connected to both sides of the layer plate, and the layer plate is sleeved on the corresponding position of the surface of the bidirectional lead screw. The positioning protrusion is connected to the front ends of both sides of the collecting concave plate.

[0016] The limiting protrusions on both sides of the shelf are embedded in the limiting grooves on the inner wall of the cabinet shell, and the positioning protrusions on both sides of the collecting concave plate are embedded in the positioning grooves. When the bidirectional screw drives the shelf to move, the limiting protrusions slide along the limiting grooves, while the positioning protrusions can move outward from the positioning grooves to separate.

[0017] Furthermore, the top of the collecting concave plate is designed to slope inward, and a drain pipe is connected to the discharge end of the collecting concave plate, with a sealing plug inserted into the inner cavity of the drain pipe.

[0018] The collecting concave plate maintains a stable horizontal position through the cooperation of the positioning convex plate and the positioning groove. Its top inclined surface guides the condensate flowing down the surface of the guide seat to the discharge end. The operator periodically pulls out the sealing plug so that the condensate is discharged to the outside of the equipment through the drain pipe.

[0019] The beneficial effects of this utility model are:

[0020] 1. This BIT aging test cabinet has a built-in bidirectional screw drive system and an electric shelf adjustment mechanism. The bidirectional screw is driven synchronously by a drive motor through a pulley and a transmission belt, so that the shelf height can be adjusted steplessly. It can be adapted to compact stacking tests of small equipment, and can also reserve vertical expansion space for large test pieces.

[0021] 2. This BIT aging test cabinet features a top heat exchanger and built-in cooling fans on the shelves, forming a three-dimensional thermal management architecture. The conical air guide can precisely guide hot air to the heat dissipation area, and together with the heat dissipation holes on the shelves, it forms a vertical airflow channel, effectively eliminating the airflow short-circuiting phenomenon of traditional external ventilation solutions. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of a BIT aging test cabinet according to the present invention;

[0023] Figure 2 This is a schematic diagram of the separation structure of the cabinet shell and cabinet door of a BIT aging test cabinet according to the present invention;

[0024] Figure 3 This is a cross-sectional structural diagram of the cabinet shell of a BIT aging test cabinet according to the present invention;

[0025] Figure 4 This is a schematic diagram of a bidirectional lead screw and its connection structure for a BIT aging test cabinet according to this utility model.

[0026] Figure 5This is a cross-sectional internal structure diagram of the shelf of a BIT aging test cabinet according to the present invention.

[0027] Figure 6 This is a schematic cross-sectional view of the flow guide seat and the collection concave plate of a BIT aging test cabinet according to the present invention.

[0028] In the diagram, 1. Cabinet shell; 2. Cabinet door; 3. Observation window; 4. Drive motor; 5. Heat exchanger; 6. Bidirectional lead screw; 7. Pulley; 8. Drive belt; 9. Shelf; 10. Multi-channel data acquisition card; 11. Temperature sensor; 12. Independent power supply; 13. Partition plate; 14. Heat dissipation hole; 15. Cooling fan; 16. Limiting protrusion; 17. Flow guide seat; 18. Collection concave plate; 19. Positioning protrusion; 20. Piping; 21. Sealing plug; 22. Limiting groove; 23. Positioning groove. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0030] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 A specific implementation of the BIT aging test cabinet includes a cabinet shell 1 and a cabinet door 2. The cabinet door 2 is hinged to the cabinet shell 1. Shelves 9 are added to the upper and lower parts of the inner cavity of the cabinet shell 1. An observation window 3 is installed on the front of the cabinet door 2. A heat exchanger 5 and a drive motor 4 are respectively installed at the top center and the outer side of the cabinet shell 1. Bidirectional lead screws 6 are rotatably connected to both sides of the inner cavity of the cabinet shell 1. The top of the bidirectional lead screws 6 is coaxially connected to the drive motor 4. Pulleys 7 are installed at the bottom of the bidirectional lead screws 6. A transmission belt 8 is added between the pulleys 7. Shelves 9 are sleeved and connected to the upper and lower parts of the surface of the bidirectional lead screws 6 respectively.

[0031] A multi-channel data acquisition card 10 is installed on the back of the inner cavity of the cabinet shell 1. Temperature sensors 11 and independent power supplies 12 are installed on the upper surface of each shelf 9. A heat dissipation hole 14 is opened in the center of the inner cavity of the shelf 9, and a cooling fan 15 is installed in the inner cavity of the heat dissipation hole 14. A flow guide seat 17 is added to the top of the inner cavity of the cabinet shell 1. A tapered flow guide channel is opened at the bottom of the flow guide seat 17. The flow guide seat 17 corresponds to the bottom end of the heat exchanger 5. A collection concave plate 18 is added below the flow guide seat 17. The bidirectional lead screw 6 is driven to rotate by the drive motor 4. The upper and lower sets of bidirectional lead screws 6 are rotated synchronously by the transmission connection of the pulley 7 and the transmission belt 8, which drives the shelf 9 sleeved on the surface of the bidirectional lead screw 6 to move in the vertical direction. The spacing of the shelf 9 is adjusted according to the size requirements of the module under test to complete the space configuration of the test chamber.

[0032] After the heat exchanger 5 is started, the regulated airflow is vertically delivered downwards to the test chamber through the tapered guide channel at the bottom of the guide seat 17. The cooling fan 15 inside the shelf 9 forms a horizontal airflow supplement through the heat dissipation holes 14. The independent power supply 12 provides independent power to the modules under test on each shelf 9. The temperature sensor 11 monitors the temperature parameters of the shelf 9 area in real time. The multi-channel data acquisition card 10 synchronously receives all sensor signals and electrical performance data of the modules under test, and records the test data in a time sequence using a preset algorithm during temperature alternation testing. During the process, the condensate generated on the surface of the guide seat 17 flows along the conical guide channel to the collecting concave plate 18. The condensate on the surface of the collecting concave plate 18 is guided into the collecting concave plate 18 along the inclined guide surface, avoiding liquid dripping and interference with the test environment. Through the coordinated action of the bidirectional lead screw 6 and the belt drive mechanism, the spacing between the layers 9 can be infinitely adjusted, which is compatible with test modules of different heights. The condensate management module composed of the guide seat 17 and the collecting concave plate 18 effectively solves the problem of liquid accumulation in high and low temperature impact tests and avoids the risk of electrical short circuits.

[0033] like Figure 3 , Figure 4 and Figure 5 As shown, the drive motor 4 is connected to the cabinet housing 1 via a motor mount, and the drive motor 4 is coaxially connected to the top of the corresponding bidirectional lead screw 6. The drive motor 4 forms a rigid connection with the cabinet housing 1 via the motor mount. When the drive motor 4 starts, its output shaft drives the coaxially connected bidirectional lead screw 6 to rotate. Through the helical transmission action of the bidirectional thread on the surface of the bidirectional lead screw 6, the shelf 9 sleeved on the surface of the bidirectional lead screw 6 is driven to move vertically up and down. The rigid connection between the drive motor 4 and the cabinet housing 1 via the motor mount effectively eliminates the vibration transmission loss caused by the traditional flexible connection method, and makes the rotation of the bidirectional lead screw 6 synchronous. The top and bottom of the heat dissipation hole 14 are equipped with partition mesh plates 13, and the cooling fan 15 and the temperature sensor 11 are connected to the corresponding independent power supply 12 via wiring.

[0034] The partition plate 13 inside the heat dissipation hole 14 forms a filtering barrier for airflow. The independent power supply 12 supplies power to the cooling fan 15 and the temperature sensor 11 through a preset circuit. When the cooling fan 15 is running, it drives the airflow to pass through the partition plate 13 and then through the heat dissipation hole 14. The temperature sensor 11 simultaneously collects the surface temperature data of the shelf 9. The double-layer partition plate 13 inside the heat dissipation hole 14 effectively prevents foreign objects from entering the inner cavity of the shelf 9 and causing the cooling fan 15 to jam. Limiting grooves 22 and positioning grooves 23 are respectively opened on both sides of the inner wall of the cabinet shell 1. Limiting protrusions 16 and positioning protrusions 19 are slidably connected to the inner cavities of the limiting grooves 22 and positioning grooves 23, respectively. The limiting protrusions 16 move along the limiting grooves 22, and the positioning protrusions 19 move along the positioning grooves 23. The sliding fit design of the limiting grooves 22 and the limiting protrusions 16 and the embedded connection structure of the positioning grooves 23 and the positioning protrusions 19 can ensure the stability of the shelf 9 and the collecting recess 18 during use.

[0035] like Figure 5 and Figure 6 As shown, the limiting protrusion 16 is connected to both sides of the shelf 9, and the shelf 9 is sleeved on the corresponding surface of the bidirectional lead screw 6. The positioning protrusion 19 is connected to the front ends of both sides of the collecting concave plate 18. The limiting protrusion 16 on both sides of the shelf 9 is embedded in the limiting groove 22 on the inner wall of the cabinet shell 1, and the positioning protrusion 19 on both sides of the collecting concave plate 18 is embedded in the positioning groove 23. When the bidirectional lead screw 6 drives the shelf 9 to move, the limiting protrusion 16 slides along the limiting groove 22, while the positioning protrusion 19 can move outward from the positioning groove 23 to separate. The top of the collecting concave plate 18 is designed to be inclined inward, and a drain pipe 20 is connected to the discharge end of the collecting concave plate 18, and a sealing plug 21 is inserted into the inner cavity of the drain pipe 20. The collecting concave plate 18 maintains a stable horizontal position through the cooperation of the positioning protrusion 19 and the positioning groove 23. Its top inclined surface guides the condensate flowing down the surface of the guide seat 17 to the discharge end. The operator periodically pulls out the sealing plug 21 so that the condensate is discharged to the outside of the equipment through the drain pipe 20. The top of the collecting concave plate 18 adopts an inclined design, which, together with the straight-through structure of the drain pipe 20, improves the efficiency of condensate discharge.

[0036] The operation of a BIT aging test cabinet in this embodiment is as follows: The operator starts the drive motor 4 by controlling it. The drive motor 4 is rigidly connected to the cabinet shell 1 through the motor base. Its output shaft drives the coaxially connected bidirectional lead screw 6 to rotate. The bidirectional threads on the surface of the bidirectional lead screw 6 drive the shelf 9 sleeved on its surface to move vertically through helical transmission. The upper and lower sets of bidirectional lead screws 6 rotate synchronously through the pulley 7 and the transmission belt 8 to ensure the consistency of the lifting and lowering movement of the shelf 9. During the movement of the shelf 9, the limiting protrusions 16 on both sides slide along the limiting grooves 22 on the inner wall of the cabinet shell 1. At the same time, the collecting concave plate 18 maintains a stable horizontal position through the positioning protrusion 19 and the positioning groove 23, ensuring the accuracy of the shelf spacing adjustment and the structural stability.

[0037] After the heat exchanger 5 is started, the regulated airflow is vertically delivered downward to the test chamber through the conical guide channel at the bottom of the guide seat 17. The conical design of the guide seat 17 optimizes the uniformity of airflow distribution. The cooling fan 15 in the inner cavity of the shelf 9 forms a horizontal airflow supplement through the heat dissipation holes 14. The partition mesh 13 at the top and bottom of the heat dissipation holes 14 filters the airflow to prevent foreign objects from entering the inner cavity of the shelf 9. The independent power supply 12 supplies power to the cooling fan 15 and the temperature sensor 11 through a preset circuit. The temperature sensor 11 monitors the surface temperature data of the shelf 9 in real time. The multi-channel data acquisition card 10 synchronously receives all sensor signals and the electrical performance parameters of the module under test.

[0038] During the temperature alternation test, the condensate generated on the surface of the guide seat 17 flows along the conical guide channel to the collecting concave plate 18. The inward tilt design of the top of the collecting concave plate 18 guides the condensate to the discharge end, preventing droplets from dripping directly. The operator periodically pulls out the sealing plug 21 inside the drain pipe 20, allowing the condensate to be discharged outside the equipment through the drain pipe 20. The straight-through drain pipe 20 structure of the collecting concave plate 18 improves the condensate discharge efficiency.

[0039] The multi-channel data acquisition card 10 records the electrical performance data of the temperature sensor 11 and the module under test in a time sequence using a preset algorithm to form a complete test curve. The independent power supply 12 provides independent power to the module under test on each layer board 9 to avoid electrical interference between modules. During the test, the cooling fan 15 runs continuously to ensure the uniformity of the temperature field in the layer board 9 area.

[0040] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A BIT aging test cabinet, comprising a cabinet shell and a cabinet door, the cabinet door being hinged to the cabinet shell, shelves being provided on the upper and lower parts of the inner cavity of the cabinet shell, and an observation window being installed on the front of the cabinet door, characterized in that: A heat exchanger and a drive motor are respectively installed at the top center and outer side of the cabinet shell. Bidirectional lead screws are rotatably connected to both sides of the inner cavity of the cabinet shell. The top of the bidirectional lead screws is coaxially connected to the drive motor, and pulleys are installed at the bottom of the bidirectional lead screws. A transmission belt is installed between the pulleys. Shelves are respectively sleeved and connected to the upper and lower surfaces of the bidirectional lead screws. A multi-channel data acquisition card is installed on the back of the inner cavity of the cabinet shell. Temperature sensors and independent power supplies are installed on the upper surface of the shelves. A heat dissipation hole is opened in the center of the inner cavity of the shelf, and a cooling fan is installed inside the heat dissipation hole. A flow guide seat is added to the top of the inner cavity of the cabinet shell, and a tapered flow channel is opened at the bottom of the flow guide seat. The flow guide seat corresponds to the bottom end of the heat exchanger, and a collection recess is added below the flow guide seat.

2. The BIT aging test cabinet according to claim 1, characterized in that: The drive motor is connected to the cabinet housing via a motor mount, and the drive motor is coaxially connected to the top of the corresponding bidirectional lead screw.

3. The BIT aging test cabinet according to claim 1, characterized in that: The top and bottom of the heat dissipation holes are equipped with partition mesh plates, and the cooling fan and temperature sensor are connected to their respective independent power supplies via wiring.

4. The BIT aging test cabinet according to claim 1, characterized in that: Limiting grooves and positioning grooves are respectively provided on both sides of the inner wall of the cabinet shell, and limiting protrusions and positioning protrusions are slidably connected to the inner cavities of the limiting grooves and positioning grooves respectively.

5. The BIT aging test cabinet according to claim 4, characterized in that: The limiting protrusion is connected to both sides of the shelf, and the shelf is sleeved on the corresponding position on the surface of the bidirectional lead screw. The positioning protrusion is connected to the front ends of both sides of the collecting concave plate.

6. The BIT aging test cabinet according to claim 1, characterized in that: The top of the collecting concave plate is designed to slope inward, and a drain pipe is connected to the discharge end of the collecting concave plate, with a sealing plug inserted into the inner cavity of the drain pipe.

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