1. An electronic device aging test system comprises a shell (1), and is characterized in that: a support (3) is arranged in the shell (1), the support (3) is used for bearing a plurality of aging test modules (20), and the support (3) divides the inner cavity of the shell (1) into an air inlet duct (5) and an air return duct (8);

a plurality of test air inlets (7) are formed in the support (3), the test air inlets (7) are aligned to the aging test module (20), and the test air inlets (7) are communicated with the air inlet duct (5) and the air return duct (8);

a circulating fan (2) is arranged between the air inlet duct (5) and the air return duct (8) so as to enable air to circulate between the air inlet duct (5) and the air return duct (8) in a reciprocating manner.

2. The electronic device burn-in test system of claim 1, wherein: the air inlet duct (5) or the air return duct (8) is provided with a heating device (4), the heating device (4) is an electric heating device, the electric heating device (4) is connected with radiating fins, and the radiating fins are arranged along the cross section of the air inlet duct (5) or the air return duct (8) so that air must pass through the radiating fins for heat exchange.

3. The electronic device burn-in test system of claim 1, wherein: the support (3) is arranged in an S shape, the return air duct (8) is communicated with the branch air inlet ducts (6), the return air duct (8) is communicated with the branch return air ducts (22), and the branch air inlet ducts (6) are communicated with the branch return air ducts (22) through the test air inlet (7);

the aging test module (20) is arranged on the branch return air duct (22).

4. An electronic device burn-in test system as claimed in claim 3, wherein: the aging test module (20) is detachably connected with the branch return air duct (22);

be equipped with experimental keysets (17) in branch return air wind channel (22), be equipped with connecting seat (207) on experimental keysets (17), connecting seat (207) are used for being connected with keysets (202) electricity, and the position relative with connecting seat (207) is equipped with locating pin (201) or screw on experimental keysets (17), and locating pin (201) or screw are used for locking keysets (202).

5. The electronic device burn-in test system of claim 4, wherein: a rotatable pressing plate is arranged on the positioning pin (201), when one end of the adapter plate (202) is inserted into the connecting seat (207), the pressing plate rotates to the position above the adapter plate (202), and the adapter plate (202) is locked.

6. An electronic device burn-in test system as claimed in claim 3, wherein: the branch return air duct (22) is fixedly provided with a test adapter plate (17), the test adapter plate (17) is provided with a connecting seat (207), the connecting seat (207) is electrically connected with the golden fingers on the adapter plate (202), the adapter plate (202) is provided with a plurality of adapter seats (205), the adapter seats (205) are electrically connected with the golden fingers, the adapter seats (205) are used for being electrically connected with a test element (204), and the test adapter plate (17) is fixedly connected with a reinforced seat plate (23).

7. The electronic device burn-in test system of claim 1, wherein: an electric control fresh air inlet (12) is also arranged on the return air duct (8) and is used for controllably opening and closing to introduce fresh air.

8. An electronic device burn-in test system according to any one of claims 4 to 7, wherein: a temperature sensor (18) is arranged at a position close to the aging test module (20) and used for monitoring the temperature change of the test element (204);

the temperature control device is also provided with a main control device (11), the temperature sensor (18) is electrically connected with the input end of the main control device (11), and the main control device (11) is also electrically connected with the heating device (4), the circulating fan (2), the connecting seat (207) and the electric control fresh air inlet (12).

9. The electronic device burn-in test system of claim 1, wherein: an air inlet adjusting plate (13) is further arranged at the test air inlet (7), a plurality of air vents are formed in the air inlet adjusting plate (13), the air vents are aligned with the test air inlets (7), and through adjusting the positions of the air inlet adjusting plates (13), the through-flow cross sections of the test air inlets (7) can be adjusted.

10. An electronic device burn-in test system according to any one of claims 1 and 7 to 9, wherein: an air inlet pressure sensor (9) is arranged on the air inlet duct (5), and a return air pressure sensor (10) is arranged on the return air duct (8);

the air conditioner is also provided with a main control device (11), an air inlet pressure sensor (9) and an air return pressure sensor (10) are electrically connected with the input end of the main control device (11), and the main control device (11) is also electrically connected with the circulating fan (2).

Background

With the development of optical communication technology, the stability and reliability of networks are more and more emphasized, and the reliability test requirements of optical devices and modules are more and more increased. When the optical device is subjected to reliability test, high-temperature power-on aging test is required, and products with unstable states and obviously reduced performance indexes are screened out. The common method for aging the device is to put the device in a high-temperature environment of an incubator, energize the device, and take out the device after a certain time to screen out defective products. The traditional incubator adopts a mode of hot air integral circulation to control the temperature in the cabin, the air speed is relatively small, and the air flow velocity is not uniform at different positions in the cabin. When the power of the device is larger, the good heat dissipation temperature of the device is lower at the place with larger wind speed due to the larger heat productivity of the device, and the poor heat dissipation temperature of the device is higher at the place with lower wind speed. By adopting the traditional aging air duct design, the temperature difference between the modules is large, so that a relatively accurate aging environment cannot be provided for the whole bin module, and the purpose of early screening cannot be achieved. The solution described in the test cabinet of the servo driving device of chinese patent CN 111273107 a has a problem that the temperature difference between the modules is large.

Disclosure of Invention

The invention aims to provide an electronic device aging test system which can ensure that the test environment among all test elements is kept consistent so as to obtain a reliable test result. In the preferred scheme, the obtaining of the test result can be accelerated to a certain extent, and the test efficiency is improved. Can avoid damaging a large amount of test elements and avoid the occurrence of test accidents.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an electronic device aging test system comprises a shell, wherein a support is arranged in the shell and used for bearing a plurality of aging test modules, and the support divides an inner cavity of the shell into an air inlet duct and an air return duct;

the bracket is provided with a plurality of test air inlets, the test air inlets are aligned to the aging test module, and the test air inlets are communicated with the air inlet duct and the air return duct;

a circulating fan is arranged between the air inlet duct and the air return duct so as to enable air to circulate between the air inlet duct and the air return duct in a reciprocating manner.

In the preferred scheme, a heating device is arranged on the air inlet duct or the air return duct, the heating device is an electric heating device, the electric heating device is connected with radiating fins, and the radiating fins are arranged along the cross section of the air inlet duct or the air return duct, so that the air must pass through the radiating fins for heat exchange.

In the preferred scheme, the support is arranged in an S shape, the return air duct is communicated with the branch air inlet ducts, the return air duct is communicated with the branch return air ducts, and each branch air inlet duct is communicated with the branch return air duct through the test air inlet;

the aging test module is arranged on the branch return air duct.

In the preferred scheme, the aging test module is detachably connected with the branch return air duct;

the branch return air duct is provided with a test adapter plate, the test adapter plate is provided with a connecting seat, the connecting seat is used for being electrically connected with the adapter plate, a positioning pin or a screw is arranged on the test adapter plate and opposite to the connecting seat, and the positioning pin or the screw is used for locking the adapter plate.

In the preferred scheme, be equipped with rotatable clamp plate on the locating pin, in the connecting seat was inserted to the one end of keysets, the clamp plate rotated the top of keysets, locked the keysets.

In the preferred scheme, a test adapter plate is fixedly arranged on the branch return air duct, a connecting seat is arranged on the test adapter plate, the connecting seat is electrically connected with the golden fingers on the adapter plate, a plurality of adapter seats are arranged on the adapter plate, the adapter seats are electrically connected with the golden fingers, the adapter seats are used for being electrically connected with test elements, and the test adapter plate is fixedly connected with the reinforced seat plate.

In the preferred scheme, an electric control fresh air opening is further arranged in the return air duct and used for opening and closing in a controllable mode to guide in fresh air.

In a preferred scheme, a temperature sensor is arranged at a position close to the aging test module and used for monitoring the temperature change of the test element;

the temperature sensor is electrically connected with the input end of the main control device, and the main control device is also electrically connected with the heating device, the circulating fan, the connecting seat and the electric control fresh air inlet.

In the preferred scheme, an air inlet adjusting plate is further arranged at the test air inlet, a plurality of air vents are formed in the air inlet adjusting plate and aligned with the test air inlets, and through adjusting the positions of the air inlet adjusting plates, the through-flow cross sections of the test air inlets are adjusted.

In the preferred scheme, an air inlet pressure sensor is arranged on an air inlet duct, and a return air pressure sensor is arranged on a return air duct;

the air conditioner is also provided with a main control device, the air inlet pressure sensor and the air return pressure sensor are electrically connected with the input end of the main control device, and the main control device is also electrically connected with the circulating fan.

According to the electronic device aging test system, by adopting the structure, the test environments given to the test elements can be uniformly distributed, and the consistency of test results is ensured. The combination of the heating device, the temperature sensor, the circulating fan, the electric control fresh air port and the main control device can be used for obtaining a test result in an accelerated manner by utilizing a simulated limit environment in a safe and controllable range. The combination of the air inlet pressure sensor, the air return pressure sensor and the main control device can further improve the test efficiency. The air inlet adjusting plate can adjust the air speed according to the test requirements. The adapter plate and the adapter structure can be used for adapting according to different test elements, and can cut off the power supply of the adapter at any time according to the test progress, so that the equipment safety is ensured.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of a preferred structure of the present invention.

Fig. 3 is a perspective view of the present invention.

Fig. 4 is a schematic side view of the electric control fresh air inlet of the invention.

FIG. 5 is a schematic structural diagram of a burn-in test module according to the present invention.

FIG. 6 is a schematic view of another preferred structure of the burn-in module of the present invention.

FIG. 7 is a schematic diagram of a side view of a clip of the burn-in test module of the present invention.

FIG. 8 is a schematic view of another preferred structure of the burn-in module of the present invention.

Fig. 9 is a side view of the main control device shaft of the present invention.

In the figure: the device comprises a shell 1, a circulating fan 2, a support 3, a heating device 4, an air inlet duct 5, a branch air inlet duct 6, a test air inlet 7, a return air duct 8, an air inlet pressure sensor 9, a return air pressure sensor 10, a main control device 11, an electronic control fresh air inlet 12, a stepping motor 121, a rotating shaft 122, a driving wheel 123, a louver 124, a driving belt 125, an air inlet adjusting plate 13, an observation sealing door 14, an upper air guide arc plate 15, an upper air guide arc plate 16, a test adapter plate 17, a temperature sensor 18, a return air inlet 19, an aging test module 20, a positioning pin 201, an adapter plate 202, a radiating fin 203, a test element 204, an adapter seat 205, a pressure spring 206, a connecting seat 207, a buckle 208, an air inlet direction 21, a branch return air duct 22 and a reinforced seat plate 23.

Detailed Description

Example 1:

an electronic device aging test system comprises a shell 1, wherein a support 3 is arranged in the shell 1, the support 3 is used for bearing a plurality of aging test modules 20, and the support 3 divides an inner cavity of the shell 1 into an air inlet duct 5 and an air return duct 8;

the bracket 3 is provided with a plurality of test air inlets 7, the test air inlets 7 are aligned to the aging test module 20, and the test air inlets 7 are communicated with the air inlet duct 5 and the air return duct 8;

a circulating fan 2 is arranged between the air inlet duct 5 and the air return duct 8 so as to make the air circulate between the air inlet duct 5 and the air return duct 8 in a reciprocating way. With this configuration, the aging test of the test element 204 is accelerated by the circulating air. Preferably, the circulation fan 2 is a centrifugal fan.

The preferred scheme is as in fig. 1 and 2, a heating device 4 is arranged on an air inlet duct 5 or an air return duct 8, the heating device 4 is an electric heating device, the electric heating device 4 is connected with radiating fins, and the radiating fins are arranged along the cross section of the air inlet duct 5 or the air return duct 8, so that the air must pass through the radiating fins for heat exchange. In this case, the electric heating device 4 is preferably disposed at a position of the return air duct 8 near the air inlet of the circulating fan 2. By the structure, the circulating air is uniformly heated, and the test efficiency is further accelerated.

The preferable scheme is as shown in fig. 1 and 2, the bracket 3 is arranged in an S shape, the return air duct 8 is communicated with a plurality of branch air inlet ducts 6, the return air duct 8 is communicated with a plurality of branch return air ducts 22, and each branch air inlet duct 6 is communicated with each branch return air duct 22 through a test air inlet 7;

the burn-in module 20 is mounted in a branch return air duct 22. With the structure, the air distribution of each branch air inlet duct 6 is uniform, and the blown air of each aging test module 20 is also kept uniform. The test efficiency is improved, and meanwhile, the consistency of test results can be ensured. The branch air inlet duct 6 and the branch air return duct 22 are horizontally disposed in this example, but it is expected that the above technical effects can be achieved by rotating the branch air inlet duct 6 and the branch air return duct 22 by 90 ° as a whole, and therefore, the above technical effects are equivalent to the above technical effects. Preferably, the cross section of the inlet air duct 5 is greater than or equal to the sum of the cross sections of the branch inlet air ducts 6, so as to increase the wind speed at the position of the test air inlet 7. Between the branch return air duct 22 and the return air duct 8, a plurality of return air inlets 19 are provided to form turbulence to make the temperature of the air more uniform. And the through-flow cross-section of the return air opening 19 is substantially identical to the through-flow cross-section of the test air inlet opening 7.

In the preferred embodiment shown in fig. 1, 2 and 5, the aging test module 20 is detachably connected to the branch return air duct 22;

the branch return air duct 22 is provided with a test adapter plate 17, the test adapter plate 17 is provided with a connecting seat 207, the connecting seat 207 is used for being connected with the adapter plate 202, a positioning pin 201 or a screw is arranged on the test adapter plate 17 at a position opposite to the connecting seat 207, and the positioning pin 201 or the screw is used for locking the adapter plate 202. By the structure, the test adapter plate 17 can be conveniently and quickly assembled and disassembled, and the test adapter plate 17 of different models can be replaced according to test requirements so as to adapt to test elements 204 of different models.

Preferably, as shown in fig. 5, a rotatable pressing plate is disposed on the positioning pin 201, and when one end of the adapter plate 202 is inserted into the connecting seat 207, the pressing plate rotates above the adapter plate 202 to lock the adapter plate 202. In fig. 5, the positioning pin 201 is mounted at the other end of the adapter plate 202, but it is also possible to mount or add more positioning pins 201 on both sides.

In a preferred embodiment, as shown in fig. 5 to 7, an adapter 205 is provided on the adapter plate 202 for inserting the test element 204, and two sides of the adapter 205 are provided with fasteners 208 for fixing the heat sink 203 by a compression spring 206. Holes are formed in the buckles 208, hooks are arranged at two ends of the pressure spring 206, the buckles 208 are hooked by the hooks, so that the pressure spring 206 is fixed, and the heat radiating fins 203 are fixed by the pressure spring 206.

In another preferred embodiment, as shown in fig. 8, a test adapter plate 17 is fixedly arranged on the branch return air duct 22, a connecting seat 207 is arranged on the test adapter plate 17, the connecting seat 207 is electrically connected with the gold finger on the adapter plate 202, a plurality of adapter seats 205 are arranged on the adapter plate 202, the adapter seats 205 are electrically connected with the gold finger, the adapter seats 205 are used for electrically connecting with the test element 204, and the test adapter plate 17 is further fixedly connected with the reinforced seat plate 23. With this configuration, the burn-in test of the plurality of test elements 204 can be simultaneously performed.

Another preferred scheme is that as shown in fig. 9, a master control device is further provided to control a plurality of aging test devices, that is, a plurality of independent circulating fans 2, air inlet ducts 5, air return ducts 8, and independent observation sealing doors 14 are provided in one housing 1, and one master control device can control each aging test device to perform an experiment independently.

Example 2:

on the basis of the embodiment 1, as shown in fig. 2, an electrically controlled fresh air opening 12 is further provided in the return air duct 8 for opening and closing in a controllable manner to introduce fresh air. In the actual test process, there is also the possibility of excessive temperatures or the generation of combustible gases, at which point it is necessary to introduce fresh air.

In a preferred embodiment, a temperature sensor 18 is disposed near the burn-in test module 20 for monitoring the temperature change of the test element 204; preferably, a hole is provided in the bottom of the adapter 205, into which the probe of the temperature sensor 18 extends and contacts the bottom of the test element 204 to better measure the operating temperature of the test element 204.

The temperature control device is also provided with a main control device 11, the temperature sensor 18 is electrically connected with the input end of the main control device 11, and the main control device 11 is also electrically connected with the heating device 4, the circulating fan 2 and the electric control fresh air inlet 12. According to the scheme, when the temperature sensor 18 detects that the temperature is low, the input power of the heating device 4 is increased, so that the temperature of the circulating air is increased, and the rotating speed of the circulating fan 2 is increased, so that the test environment temperature of each test element 204 is kept consistent. And when the temperature that temperature sensor 18 detected is too high, then reduce and even close heating device 4's input power, optionally, still open automatically controlled fresh air inlet 12 and introduce the new trend, increase circulating fan 2's rotational speed simultaneously to restrain too high test temperature, avoid appearing the test accident. The main control device 11 in this example adopts a PLC or a single chip microcomputer according to the test requirements, the main control device 11 is further provided with a display touch panel and an alarm device, and the main control device 11 is further provided with a wireless communication device for receiving remote control.

In a preferred embodiment, as shown in fig. 5, the electrically controlled fresh air inlet 12 in this embodiment is configured to include louver blades 124 overlapping each other from top to bottom, each louver blade 124 is fixedly connected to a plurality of rotating shafts 122, the connecting positions of the rotating shafts 122 and the louver blades 124 are located above the center of gravity of the louver blades 124, and the louver blades 124 overlap each other in such a manner that the louver blades 124 tend to be locked. The return air duct 8 is typically at a lower pressure than atmospheric pressure due to the pulling effect of the circulation fan 2, thereby causing the louvers 124 to engage one another. The stepping motor 121 is fixedly connected to the rotating shaft 122, driving wheels 123 are provided on the rotating shaft 122, and the driving wheels 123 are connected to each other through a driving belt 125, so that the rotating shafts 122 rotate in the same direction. When the electronic control fresh air opening 12 needs to be opened, the stepping motor 121 is powered on and rotates a corner to drive each rotating shaft 122 to rotate a corner and keep the rotating shaft, so that each louver fan 124 is driven to be opened to be close to a horizontal position.

In a preferred embodiment, as shown in fig. 2, for different test elements 204 having different test requirements, an air inlet adjusting plate 13 is further provided at the test air inlet 7, and a plurality of air vents are provided on the air inlet adjusting plate 13, the air vents are aligned with the respective test air inlets 7, and the through-flow cross-section of the test air inlets 7 is adjusted by adjusting the position of the air inlet adjusting plate 13, preferably, the horizontal position of the air inlet adjusting plate 13 in this example. Thereby obtaining different test wind speeds.

In a preferred scheme, as shown in fig. 2, an air inlet pressure sensor 9 is arranged on an air inlet duct 5, and a return air pressure sensor 10 is arranged on a return air duct 8;

the air conditioner is also provided with a main control device 11, the air inlet pressure sensor 9 and the air return pressure sensor 10 are electrically connected with the input end of the main control device 11, and the main control device 11 is also electrically connected with the circulating fan 2. The difference value between the inlet air pressure sensor 9 and the return air pressure sensor 10 is compared to adjust the rotating speed of the circulating fan 2, so that the energy consumption is reduced.

Further preferably, as shown in fig. 3, an observation seal door 14 is further provided on the front surface of the housing 1, the observation seal door 14 is connected to the housing 1 via a hinge and a lock, and a transparent plate is further provided on the observation seal door 14 for observing the state of the test element 204.

Example 3:

before testing, each test element 204 is inserted into the adapter 205 of the adapter plate 202, the compression spring 206 and the heat sink 203 are installed, then the adapter plate 202 is integrally and fixedly installed on the bracket 3, and the connecting line of the connecting seat 207 is connected with the main control device 11. Test parameters such as test temperature, early warning temperature, initial wind speed, maximum wind speed, air intake and return pressure difference and the like are set in the main control device 11; the observation seal door 14 is closed and the test is started. When the temperature is lower than the preset value, the main control device 11 starts the heating device 4, the heat exchange fins in the heating device 4 heat and exchange heat with the circulating air, so that the temperature is increased, and the temperature sensor 18 detects the working temperature of each test element 204. When the working temperature is too high and exceeds a preset upper limit value, the main control device 11 controls the electric control fresh air opening 12 to be opened, fresh air is introduced, and the air speed of the circulating fan 2 is increased. When the temperature detected by the temperature sensor 18 rises sharply, the main control device 11 disconnects the power supply to the test element 204 at that position to ensure safety. The pressure difference between the air inlet duct 5 and the air return duct 8 is controlled at a preset value, and the main control device 11 controls the rotating speed of the circulating fan 2 at a preset value so as to reduce energy consumption. After the test reaches the preset time, the main control device 11 disconnects the power supply of all the test elements 204, and records the temperature rise curves of all the test elements 204 into the database for analysis.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.