CN215833524U - Electronic product reliability testing device under simulation environment - Google Patents

Abstract

The electronic product reliability testing device under the simulated environment is characterized in that a plurality of temperature control fans are arranged at the top of an experimental bin, evaporators are arranged at air outlets of the temperature control fans, and the evaporators are connected with a four-way reversing valve, a compressor, a condenser and a throttling element through circulating cold/heat medium pipes; the bottom of the experimental bin is provided with a lower water tray, the lower part of the lower water tray is a movable tray, the movable tray is driven by a motor and a screw rod to move up and down, the upper ends of a plurality of guide rods are fixed on the lower water tray, the guide rods penetrate through the movable tray to guide, the movable tray is umbrella-shaped, a water tank is arranged below the movable tray, and the water tank is connected with the comprehensive water tank through a pipeline; the middle part of the side wall of the experiment bin is provided with a plurality of spray headers with adjustable angles. The spray header is connected with the pressurized spray pump and the comprehensive water tank through a pipeline. The utility model can realize extreme high and low temperature test, extreme humidity test, spray test and immersion test of the electronic device; the device has the advantages of wide control parameter range, high temperature control precision in the test bin, uniform regional temperature and the like.

Description

Electronic product reliability testing device under simulation environment

Technical Field

The utility model relates to the technical field of electronic equipment experimental test devices, in particular to a device for testing the reliability of an electronic product in a simulation environment.

Background

In the fields of aerospace, war industry, information engineering, material engineering and the like, a large number of electronic devices such as electronic instruments, circuit chips, battery elements and the like are used, so that the reliability of the electronic devices is a basic guarantee for ensuring whether the whole equipment can stably run for a long time. In particular, aerospace and military equipment is frequently used in high and low temperature alternation, moist and even immersion scenes and the like; electronic instruments in material engineering are often arranged under a high-temperature environment; such harsh environments present challenges to the housing tolerance of the electronic device, the placement of internal components, and the fabrication process of the electronic components. After the electronic equipment is manufactured, whether the design requirements are met or not and the field use conditions are met needs to be tested in a closed experimental box in a limit environment mode, and common tests include high and low temperature tests, humidity tests, vibration tests, air pressure vacuum tests, sand dust tests, salt spray tests and the like.

Relevant prior documents about electronic product reliability testing devices in a simulation environment are retrieved:

1. high low temperature alternation humid heat test case, application number: CN 201911110169.1; the applicant: wuxi Siquan Tech Co Ltd; and (3) abstract: high low temperature reversal damp heat test case, concretely relates to experiment detection device technical field, including the installation base, the top fixed mounting of installation base has the experiment case body, and the inside bottom fixed mounting of experiment case body has compressor unit, and the bottom fixed mounting of experiment case body left surface has overflow mouth and drain pipe, and the middle part fixed mounting of experiment case body left surface has change over switch, and the right flank fixed mounting of experiment case body has the water catch bowl. The experimental box body is arranged, the working chamber, the refrigerating unit and the electric control cabinet are combined to form the body of the device, so that the working chamber, the refrigerating unit and the electric control cabinet have independent running environments, the compressor unit is matched with the centrifugal heating fan unit to provide a cold and hot alternating environment for the working chamber, and the electric control cabinet is used for controlling the on-off of a circuit in the experimental box body, so that the operation process of the device is simplified, the operation is easy, and the use by workers is convenient.

2. A special high-low temperature system device for an electronic universal machine; application No.: CN 201120214213.6; the applicant: jinan combined testing technology, Inc.; and (3) abstract: a high-low temperature system device special for an electronic universal machine relates to a high-low temperature control system device. The utility model is characterized in that: the device comprises a test box provided with a door, wherein an installation box is arranged on one side of the test box, a fan rotating blade, a condenser and a heater are arranged in the test box from top to bottom, and a refrigeration compressor unit and an electric box are arranged in the installation box. The special high-low temperature system device for the electronic universal machine has the beneficial effects that: the temperature control precision is high, the temperature control range is wide, the operation is simple, the use is convenient, the consideration is good, the equipment structure is simple, the equipment is easy to maintain, and the device is suitable for material tests.

3. An experimental device for simulating plateau climate environment and a using method thereof; application No.: CN 202010825476.4; the applicant: university in northwest, abstract: an experimental device for simulating plateau climate environment and a use method thereof, wherein the experimental device comprises an experimental box and a sealing door movably connected to the experimental box, the experimental box is divided into an experimental space and a water storage space by a waterproof board, an air exhaust system, an air guide system and a refrigerating system acting on the experimental space are arranged in the experimental box, a lighting lamp is arranged at the top of the experimental space, two sliding grooves are respectively fixed at two sides of the lighting lamp, a light screen is slidably arranged between the two sliding grooves, a spray head and an atomizing nozzle are also arranged in the experimental space, the spray head and the atomizing nozzle are respectively communicated with a water supply mechanism, and the water supply mechanism is fixed in the water storage space; the device has the advantages that the device can simulate various climatic environments at one time, so that the authenticity and the reliability of an experiment are improved.

The test box has single function or large volume, and cannot realize a comprehensive test box integrating high and low temperature tests, spraying tests and atomization tests.

Disclosure of Invention

The utility model provides a device for testing the reliability of an electronic product in a simulated environment, which can realize extreme high and low temperature tests, extreme humidity tests, spraying tests and soaking tests on the electronic device; the device has the advantages of wide control parameter range, high temperature control precision in the test bin, uniform regional temperature and the like.

The technical scheme of the utility model is realized as follows:

the electronic product reliability testing device under the simulated environment is characterized in that a plurality of temperature control fans are arranged at the top of an experimental bin, evaporators are arranged at air outlets of the temperature control fans, and the evaporators are connected with a four-way reversing valve, a compressor, a condenser and a throttling element through circulating cold/heat medium pipes; the bottom of the experimental bin is provided with a lower water tray, the lower part of the lower water tray is a movable tray, the movable tray is driven by a motor and a screw rod to move up and down, the upper ends of a plurality of guide rods are fixed on the lower water tray, the guide rods penetrate through the movable tray to guide, the movable tray is umbrella-shaped, a water tank is arranged below the movable tray, and the water tank is connected with the comprehensive water tank through a pipeline; the middle part of the side wall of the experiment bin is provided with a plurality of spray headers with adjustable angles. The spray header is connected with the pressurized spray pump and the comprehensive water tank through a pipeline.

The water discharging disc is an umbrella-shaped stainless steel disc densely provided with 4mm water discharging holes, the movable disc is a stainless steel umbrella-shaped disc matched with the water discharging disc in shape, and the contact part of the edge of the movable disc and the water discharging disc is a matched tooth-shaped sealing ring; when the temperature test is needed, the movable disc rises under the driving of the motor and is attached to the lower water disc to form a closed bottom, and then the experiment bin is formed into a closed space. When the spraying experiment is carried out, the movable disc descends under the driving of the motor to form a full-area water drainage channel, and spray water flows into the comprehensive water tank to be circularly sprayed for use.

The pressurizing spraying pump is driven by a variable frequency motor, and the power of the pressurizing spraying pump is controlled by the PLC, so that the spraying water quantity is controlled.

Four corners in the experiment bin are provided with temperature sensors, and the four temperatures are displayed on a display screen on the side surface of the experiment box in real time; two humidity sensors are arranged on two sides of the experiment bin, and two humidity data are displayed on a display screen on the side surface of the experiment box in real time; a liquid level sensor is arranged in the experiment bin, and liquid level data are displayed on a display screen on the side face of the experiment box in real time.

The experiment chamber is characterized in that a disc type humidifier is arranged at the top of the experiment chamber and is connected with a humidification pump and a middle water tank through a pipeline, and the middle water tank is connected with a humidification liquid storage pump and a comprehensive water tank through a pipeline.

The disk humidifier is composed of 6 atomization nozzles connected in parallel, a humidification pump provides 8MPa of water pressure, the water is atomized into 6-9 μm of water mist, the water mist is diffused in the experiment chamber, the air humidity in the experiment chamber is rapidly increased, and meanwhile, the circulating fan is started, so that the air humidity of each part in the chamber can be kept consistent. A ceramsite microporous filtering layer and a liquid level device are arranged in the middle water tank, and the ceramsite microporous filtering layer filters particulate impurities in water from the comprehensive water tank to prevent the clogging of a humidifier spray nozzle; when the liquid level indicator shows that the liquid level is low,

the temperature control fan is connected with an air inlet formed in the lower side wall of the experiment bin through an air pipe. The air inlet adopts a louvered lower opening to prevent spray water from splashing to the air inlet duct.

A plurality of circulating fans are uniformly distributed on the inner side wall of the experiment bin and are connected with air inlets formed in the upper side wall of the experiment bin through air pipes. The inside of the air inlet is arranged obliquely upwards, and the air inlet is provided with a louvered lower opening to prevent spray water from splashing to the air inlet duct.

An air pipe of the air inlet of the temperature control fan is provided with an overflow water branch which is led into the water tank, and a gate valve is arranged on the branch. And the overflow water branch is used for overflowing water higher than the liquid level of the overflow branch in the experimental box to the lower water tank for circulation.

And a heater is arranged at the air outlet of the circulating fan. The heater is assembled and combined by a tubular heater and a flower-shaped radiating fin.

The evaporator is connected with the comprehensive water tank through a water pipe.

The condenser is connected with the comprehensive water tank through a water pipe.

And an observation window is arranged on the door of the experimental box.

When the electronic device in the experimental bin needs to be tested in an ice-cold environment, the electronic device is placed on a grid net supporting plate fixedly connected with the side wall in an inserting mode, a compressor works, a four-way reversing valve is adjusted to be in a refrigerating state, a refrigerant cools an evaporator through a circulating pipeline, a temperature control fan sucks air from the bottom of the experimental bin and blows the air out of the top of the experimental bin, a temperature sensor in the experimental bin transmits a signal to a Programmable Logic Controller (PLC) after the whole experimental bin is filled with cold air to reach a preset temperature, the compressor stops working, and the temperature control fan still rotates to keep the temperature in the bin uniform; meanwhile, the circulating fan on the side face can be started, so that the electronic equipment in the middle of the bin can be influenced by balanced cold air from top to bottom and from left to right.

When a hot environment test is carried out, the electronic equipment is placed on a grid mesh supporting plate fixedly inserted with the side wall, the four-way reversing valve is adjusted to a heating state, the compressor works according to a heat pump mode, a refrigerant heats the evaporator through a circulating pipeline, the temperature control fan sucks air from the bottom of the experimental bin and blows the air out from the top, after the hot air fills the whole experimental bin and reaches a preset temperature, a temperature sensor in the experimental bin transmits a signal to the PLC, the compressor stops working, but the temperature control fan still rotates to keep the uniformity of the temperature in the bin; meanwhile, the circulating fan on the side surface can be started, so that the electronic equipment in the middle of the bin can be influenced by balanced hot air from top to bottom and from left to right. When the heating temperature of the heat pump of the temperature control fan cannot meet the requirement of the heating temperature, the heater is started simultaneously, the tubular heater of the heater heats the radiator, and the circulating fan blows the heating air into the bin to further heat the air.

When the electronic equipment is immersed or the water environment is sealed, a plurality of steel wires on the upper part and the side part of the electronic equipment are suspended and fixed with anchor points on the side wall, the pressurizing spray pump is started, water in the comprehensive water tank is sprayed out from the spray head with the adjustable angle to the surface of the electronic equipment, the movable disc at the bottom of the experimental bin is driven by the motor to be separated from the lower water disc downwards, and the sprayed water flows into the water tank downwards from the lower water disc with the small holes and then enters the comprehensive water tank again to be collected and recycled.

The advantages of the utility model are as follows:

(1) the utility model can be used for the comprehensive test of various electrical instruments and electronic components, the highest test temperature is 150 ℃ (the heater and the circulating fan are started), and the lowest test temperature is-45 ℃; the highest test air humidity is 100%, the maximum instantaneous spraying flow is 1.5L/s, and the temperature control precision is +/-1 ℃; the high and low temperature test, the humidity test and the spraying test can be completed in the same experiment box, the application range is wide, and the equipment is compact and occupies small area.

(2) The utility model adopts the heat pump principle to heat the experimental chamber device, and compared with the method of simply adopting an electric heater to heat, the utility model has the advantages of saving energy, reducing consumption by 72 percent and having small current impact on a circuit; when rapid heating is needed, a mode that a heat pump and a heater are simultaneously started is adopted, the experiment bin size (W, H, D) 700, 800 and 800mm is taken as an example, and the first section of the heating rate reaches the air temperature of 85 ℃ and is 1 ℃/s; in the second section, the heater of the circulating fan is independently started, and the heating rate is 2.5 ℃/s when the air temperature reaches 150 ℃.

(3) The lower water tray at the bottom of the utility model is in a full-area opening mode, under the condition of spraying water with an ultra-large flow, no water accumulation and no water flow channel blockage in the experimental bin can be realized, and the sealing effect of electronic equipment under the condition of high-flow spraying water is tested; when the electronic equipment needs to be subjected to a soaking experiment, the electronic equipment can also be fixed in the middle of the experiment bin by using a steel wire, the movable tray is attached and sealed with the lower water tray, and the experiment bin is filled with water to perform the soaking experiment; and the clearance between the movable disc and the lower water disc can be controlled within a certain distance in the state of opening the single-side spray pipe, so that the soaking water in the experimental bin is in a vortex state, and the sealing effect of the electronic equipment in the soaking water environment with flow velocity can be tested.

(4) The temperature difference of each position in the bin is less than 1 ℃, compared with the temperature difference of 4-5 ℃ of each position obtained by simply starting the temperature control fans, the temperature uniformity of the bin is greatly improved; for the tested electronic device, the upper and lower end surfaces and the left and right end surfaces are used. The temperature influence is more uniform, and the accuracy of the experiment is greatly improved.

(5) The evaporimeter comdenstion water in this patent can collect and get into comprehensive water tank, and the comdenstion water does not have the outflow to supply to the system in, the water circulating system of system need not often to supply deionized water, has increased system self-loopa ability.

Drawings

FIG. 1 is a schematic overall view of the present invention;

FIG. 2 is a schematic view of the experiment chamber waterway structure;

FIG. 3 is an enlarged view of the structure at I in FIG. 2 (with the movable plate lowered);

FIG. 4 is a schematic view of the drain pan, the movable pan and the surrounding structure (the movable pan is closed when it ascends);

FIG. 5 is a schematic view of the experimental bin blower and the circulation air path;

FIG. 6 is a schematic view showing a structure of a cooling/heating medium circulation;

FIG. 7 is a schematic diagram of the structure of the evaporator condensate pipeline;

fig. 8 is a schematic structural view of a shower head opening mode in embodiment 7;

the reference numbers in the figures illustrate: 1. an observation window; 2. a comprehensive water tank; 31. a pressurized spray pump; 32. a humidification liquid storage pump; 33. an intermediate water tank; 34. a humidifying pump; 35. a disc humidifier; 36. a shower head; 41. a temperature control fan; 42. an evaporator; 43. a circulating fan; 44. a heater; 51. a condenser; 52. a four-way reversing valve; 53. a throttling element; 54. a compressor; 6. a water tank; 61. a drain pan; 62. a movable tray; 63. a motor; 64. a screw rod; 65. a guide rod.

Detailed Description

Example 1

The method comprises the steps of carrying out low-temperature environment testing on electronic equipment, starting 2 temperature control fans at the top of an experimental bin, starting 4 circulating fans at the side of the experimental bin, closing a bottom drain pan and a movable pan in a joint mode, starting a four-way reversing valve in a refrigeration mode through a PLC, connecting evaporator cooling water with a defrosting device with a comprehensive water tank, starting a compressor intermittently after the cooling temperature reaches a preset temperature of minus 20 ℃, keeping the temperature at minus 20 +/-1 ℃ for 24 hours, and starting a bin door to take out the electronic equipment to complete testing after the cooling temperature reaches the preset temperature of minus 20 ℃.

Example 2

The method comprises the steps of carrying out high-temperature environment test on electronic equipment, starting 2 temperature control fans at the top of an experiment bin, starting 4 circulating fans and heaters at the side of the experiment bin, closing a lower water tray and a movable tray at the bottom of the experiment bin in a joint mode, starting a heat pump mode by starting a four-way reversing valve through a PLC (programmable logic controller), closing a compressor when the temperature reaches 85 ℃, continuously heating the heaters, intermittently starting the heaters after the heating temperature reaches preset 115 ℃, keeping the temperature at 115 +/-1 ℃ for 10 hours, and starting a bin door to take out the electronic equipment to finish the test after the heating temperature reaches the preset temperature of 115 ℃.

Example 3

Carry out high humidity environmental test to electronic equipment, 2 accuse temperature fans are opened at experiment storehouse top, the compressor normal close, 4 circulating fan are opened to the experiment storehouse lateral part, bottom drain pan and activity dish laminating are closed, open the humidification pump through PLC, disc humidifier spraying humidification, the level gauge is in the low level back in the middle water tank, signal transmission PLC, humidification liquid storage pump is opened and is supplied water for middle water tank, 100% air water content lasts 48 hours, open the door after the completion and take out electronic equipment and accomplish the test.

Example 4

The method comprises the steps of carrying out high-humidity high-temperature environment testing on electronic equipment, starting 2 temperature control fans at the top of an experimental bin, starting 4 circulating fans at the side of the experimental bin, closing a bottom water draining disc and a movable disc in a fit mode, starting a four-way reversing valve in a heat pump mode through a PLC (programmable logic controller), starting a humidifying pump through the PLC, carrying out spray humidification through a disc humidifier, starting a signal transmission PLC after a liquid level device in an intermediate water tank is at a low position, starting a humidifying liquid storage pump to replenish water for the intermediate water tank, starting a compressor intermittently after cooling temperature reaches 75 ℃, keeping the temperature at 75 +/-1 ℃, continuing for 12 hours, and starting a bin door to take out the electronic equipment to complete testing after completion.

Example 5

The spraying environment test is carried out on the electronic equipment, a pressurizing spraying pump is started, the power of a variable frequency motor is 75%, the total spraying flow is 1.2L/s, 8 spraying heads are divided into two groups, one group surrounds the periphery of the device to be tested and is inclined upwards by 45 degrees, the other group surrounds the periphery of the device to be tested and is inclined downwards by 30 degrees, a bottom water tray and a movable tray are completely separated and opened, the spraying state is kept for 4 hours, and after the test is finished, a bin door is opened to take out the electronic equipment to finish the test.

Example 6

And (3) carrying out soaking environment test on the electronic equipment, placing the device to be tested at the bottom of the bin, fixing the device to be tested, closing a bottom water discharging disc and a movable disc in a fitting manner, starting a pressurizing spray pump, enabling the water level to be lower than the position of the circulating fan by 10cm, soaking for 24 hours, then descending the movable disc to drain water, and opening a bin door to take out the electronic equipment to complete the soaking test.

Example 7

Carrying out vortex soaking test on electronic equipment, putting a device to be tested at the bottom of a bin and fixing the device, closing a bottom drain pan and a movable pan in a laminating manner, opening an overflow water branch gate valve at an air pipe of an air inlet of a temperature control fan, opening a pressurizing spray pump firstly to enable the water level in an experimental bin to reach a preset height, then closing other spray headers, opening a spray header at the diagonal position of a lower-layer spray header, enabling the water in the experimental bin to form a vortex state, leading the water sprayed out of the spray header into a lower water tank through an overflow water branch, enabling the water level to be kept constant, soaking for 24 hours in a vortex manner, descending the movable pan to drain water after the completion, and opening a bin door to take out the electronic equipment to complete the soaking test.

Claims (9)

1. Electronic product reliability testing arrangement under simulation environment, its characterized in that: the top of the experiment bin is provided with a plurality of temperature control fans (41), an evaporator (42) is arranged at an air outlet of each temperature control fan (41), and the evaporator (42) is connected with a four-way reversing valve (52), a compressor (54), a condenser (51) and a throttling element (53) through circulating cold/heat medium pipes; the bottom of the experiment chamber is provided with a lower water tray (61), the lower part of the lower water tray (61) is provided with a movable disc (62), the movable disc (62) is driven to move up and down through a motor (63) and a screw rod (64), the upper ends of a plurality of guide rods (65) are fixed on the lower water tray (61), the guide rods (65) penetrate through the movable disc (62) to guide, the movable disc (62) is umbrella-shaped, a water tank (6) is arranged below the movable disc, and the water tank (6) is connected with the comprehensive water tank (2) through a pipeline; a plurality of spray headers (36) with adjustable angles are arranged in the middle of the side wall of the experiment bin; the spray header (36) is connected with the pressurized spray pump (31) and the comprehensive water tank (2) through a pipeline.

2. The device for testing the reliability of an electronic product under a simulation environment of claim 1, wherein: the experiment chamber is characterized in that a disc type humidifier (35) is arranged at the top of the experiment chamber, the disc type humidifier (35) is connected with a humidifying pump (34) and an intermediate water tank (33) through a pipeline, and the intermediate water tank (33) is connected with a humidifying liquid storage pump (32) and a comprehensive water tank (2) through a pipeline.

3. The device for testing the reliability of an electronic product under a simulation environment of claim 1, wherein: and the temperature control fan (41) is connected with an air inlet arranged on the lower side wall of the experiment bin through an air pipe.

4. The device for testing the reliability of an electronic product under a simulation environment of claim 3, wherein: an air pipe of an air inlet of the temperature control fan (41) is provided with an overflow water branch which is led into the water tank (6), and a gate valve is arranged on the branch.

5. The device for testing the reliability of an electronic product under a simulation environment of claim 1, wherein: a plurality of circulating fans (43) are uniformly distributed on the inner side wall of the experiment bin and are connected with air inlets formed in the upper side wall of the experiment bin through air pipes.

6. The device for testing the reliability of an electronic product under a simulation environment of claim 5, wherein: a heater (44) is arranged at an air outlet of the circulating fan (43); the heater (44) is assembled and combined by a tubular heater and a flower-shaped radiating fin.

7. The device for testing the reliability of an electronic product under a simulation environment of claim 1, wherein: the evaporator (42) is connected with the comprehensive water tank (2) through a water pipe.

8. The device for testing the reliability of an electronic product under a simulation environment of claim 1, wherein: the condenser (51) is connected with the comprehensive water tank (2) through a water pipe.

9. The device for testing the reliability of an electronic product under a simulation environment of claim 1, wherein: an observation window (1) is arranged on the door of the experiment bin.

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