Multifunctional test box and test method for testing environmental reliability of product

Abstract

The invention discloses a multifunctional test box and a test method for testing environmental reliability of products, the test box comprises a box frame and a test box mounted on the box frame, a camera and a sensing integration module are mounted in the test box, a compressor, a clear water tank, a saline water tank, a condenser, a sewage tank and an air pump are mounted in the box frame, and the air pump is connected with the camera and the sensing integration module. An air inlet of the compressor is connected to the test box through a box exhaust three-way valve pipe, an exhaust port of the compressor is provided with a compression calandria, the compression calandria is in branch connection with two branch high-pressure valve pipes, and the tail ends of the two branch high-pressure valve pipes are connected to the clear water box and the saline water box respectively. The beneficial effects of the invention are that the design of the circulation loop prevents resource waste, is more environment-friendly and economical, has diversified functions, high automation degree and simple operation, solves the problems of single function and insufficient simulation degree of complex environment of the existing equipment, reduces the test cost, shortens the product research and development period, and improves the test efficiency.

Description

Technical Field

[0001] The present invention relates to the field of product reliability test devices, and particularly to a multifunctional test chamber and a test method for product environmental reliability test. Background Art

[0002] Product test chambers are used to simulate different environments to detect the tolerance of products and verify the working stability of products in harsh environments. Some energy storage products may be applied in environmental weather such as high salt, high humidity, high temperature, sand and dust, rain, etc. A high salt fog environment is likely to cause oxidation and damage of electrical contacts, sand and dust are likely to block the heat dissipation channels and cause overheating and temperature control failure of the equipment, and sealing materials are likely to age and seep water under extreme temperature differences. In order to improve the reliability and service life of energy storage devices, necessary environmental tests such as salt fog test, dust test, waterproof test, dustproof test, etc. need to be carried out during the product development process. Existing environmental reliability test chambers are all designed with single functions and can only test components, with insufficient load-carrying test capabilities for the whole machine products. In addition, the environmental simulation capabilities, automation capabilities, and equipment integration levels are all relatively low and cannot meet the test requirements of energy storage products; For example, in the implementation of salt fog to simulate the test equipment for the corrosion of metals and materials by salt fog in the natural environment and to test the ability of metal materials to resist salt fog corrosion quality, the test cycle is long, overly dependent on manual observation and calculation, and the data capture of the impact of salt fog on electrical performance changes during the full cycle detection is insufficient. When verifying its heat dissipation and stability in the dust test, a single type of dust (such as talcum powder) is used, and the particle distribution uniformity is poor, and the simulation degree of multi-source dust and sand and dust is insufficient; In the existing waterproof test to evaluate the working performance of products in the state of being exposed to rain or immersion (detecting the waterproof grade of the product shell such as IP5X, IP6X), the pressure coverage area is small and the temperature change range is limited. When simulating the dust and sand environment in the dustproof test, the negative pressure adjustment ability of the test environment is insufficient, and the reliability of the dustproof test is poor; For the above-mentioned test equipment, in terms of function, the environmental simulation ability is not strong, the integration level is not high, the automation ability is not strong, there is no high-power load interface and it cannot carry out load tests, nor can it monitor the test status and product changes in real time, the test efficiency is low, and the operation and maintenance costs are high; from the perspective of enterprises, for the scattered and independent equipment to meet various test requirements of products, it is necessary to purchase the above four test equipment, which is costly, has high maintenance costs, and occupies space, increasing the cost pressure of product R & D; from the perspective of the test operator, it is necessary to participate in the test in depth throughout the cycle. For heavy products such as batteries, multiple people are required to cooperate to complete these tests, and it is time-consuming and laborious to move back and forth between several chambers, increasing the experimental difficulty, reducing the test efficiency, and pushing up the labor cost. Summary of the Invention

[0003] The purpose of the present invention is to provide a multifunctional test chamber for product environmental reliability test to solve the above problems.

[0004] The present invention realizes the above object through the following technical solutions: A multifunctional test chamber for product environmental reliability testing, comprising a chamber frame and a test chamber installed on the chamber frame. A camera and a sensing integration module are installed in the test chamber. A compressor, a fresh water tank, a brine tank, a condenser, a sewage tank and a wind pump are installed in the chamber frame. The air inlet of the compressor is connected to the test chamber through a chamber exhaust three-way valve pipe. A compressed exhaust pipe is installed at the exhaust port of the compressor. The compressed exhaust pipe branches and is connected to two branch high-pressure valve pipes. The ends of the two branch high-pressure valve pipes are respectively connected to the fresh water tank and the brine tank. The wind pump is connected to the test chamber through a chamber intake three-way valve pipe. A condenser is installed on the chamber intake three-way valve pipe. A fresh water inlet valve pipe is installed on the fresh water tank. The end of the fresh water inlet valve pipe extends into the test chamber and is provided with a fresh water spray head. A brine inlet valve pipe is installed on the brine tank. The end of the brine inlet valve pipe extends into the test chamber and is provided with a brine spray head. The bottom of the test chamber is branched and connected with a recovery liquid pipe, a return air valve pipe and a return sewage valve pipe through a branch pipe head. The end of the return sewage valve pipe is connected to the sewage tank. The end of the return air valve pipe is connected to the wind pump. Two return liquid branch valve pipes are branched and connected to the recovery liquid pipe. The ends of the two return liquid branch valve pipes are respectively connected to the fresh water tank and the brine tank.

[0005] Further, the test chamber is composed of a sealing cover and a funnel-shaped bottom seal installed at the bottom of the sealing cover. A taking hole is provided on the sealing cover. A screw hole is provided on the edge of the taking hole. A test support frame is installed in the test chamber.

[0006] Further, a plurality of casters are installed at the bottom of the chamber frame. A bottom bearing plate is installed on the chamber frame. A protective plate is installed around the side of the chamber frame.

[0007] Further, an electric heating coil is installed on the return air valve pipe. Heaters are installed in both the fresh water tank and the brine tank.

[0008] Further, a waterproof cable joint is installed on the chamber wall of the test chamber.

[0009] Further, a pressure relief valve is installed on the pipe body of the compressed exhaust pipe.

[0010] Further, a three-way valve two is installed on the pipe body of the chamber intake three-way valve pipe, and a three-way valve one is installed on the pipe body of the chamber exhaust three-way valve pipe.

[0011] The present invention also provides a test method for the multifunctional test chamber for the aforementioned product environmental reliability testing. The specific steps are as follows: S1. Connect the multifunctional test chamber for product environmental reliability testing to a computer, place the item to be tested in the test chamber and seal it. S2. The tester inputs the test requirements according to the item to be tested, and the computer generates a program based on the test type. S3. The multifunctional test chamber for product environmental reliability testing executes the commands, mainly performing actions on different components according to different test types. S4. The camera and sensor integration module collects test data and information. At the same time, the product synchronizes its own operating status information to the processor for analysis and judgment. S5. The processor determines the quality and protection level of the product according to the test standards and the product's operating status, and generates a test report.

[0012] Further, the test types in step S3 include waterproof test, high and low temperature test, dust / dustproof test, and salt spray test.

[0013] The beneficial effects of the present invention are as follows: The design of the circulation loop of the present invention prevents waste of resources and is more environmentally friendly and economical. It solves the problem that existing equipment cannot meet the needs of live testing and establishes the relationship between test environmental variables and product performance. It solves the over-reliance on humans in testing and improves the automation and intelligence of the test chamber. It solves the problem of single function of existing equipment and insufficient simulation of complex environments. Through the integration and optimization of multiple environmental test chambers, it realizes multi-purpose in one machine, reduces the repeated transfer of the product under test, can perform different tests on different test objects, and can also perform multiple tests serially on the same test object at the same time. For example, when the dust / dustproof test is completed and the product functions normally, gradually discharge the volume of talcum powder, conduct a clean air circulation for a period of time, and then conduct a waterproof test. At this time, the sewage needs to be discharged into the sewage tank. After the waterproof test is completed and the tested equipment works normally, conduct the next salt spray test. One compressor can realize pressurized spraying of brine and clean water, which can be used for waterproof testing and at the same time for self-cleaning of experimental equipment.

[0014] It reduces the test cost and the product R & D cycle, improves the test efficiency, and alleviates the problems of tight laboratory space and test funds. Description of the Drawings

[0015] Figure 1 is the external structure diagram of the multifunctional test chamber for product environmental reliability testing of the present invention; Figure 2 is the internal structure of the multifunctional test chamber for product environmental reliability testing of the present invention Figure 1 ; Figure 3 is the internal structure of the multi-functional test chamber for product environmental reliability testing according to the present invention Figure 2 ; Figure 4 is the internal structure of the multi-functional test chamber for product environmental reliability testing according to the present invention Figure 3 ; Figure 5 is the internal structure of the multi-functional test chamber for product environmental reliability testing according to the present invention Figure 4 .

[0016] The description of the reference numerals in the drawings is as follows: 1. Frame; 2. Test chamber; 3. Sealing cover; 4. Hopper-shaped bottom; 5. Compressor; 6. Fresh water tank; 7. Brine tank; 8. Condenser; 9. Sewage tank; 10. Air pump; 11. Camera and sensor integration module; 12. Brine spray head; 13. Fresh water spray head; 14. Bottom bearing plate; 15. Test support; 16. Waterproof cable joint; 17. Chamber intake three-way valve pipe; 18. Fresh water inlet valve pipe; 19. Brine inlet valve pipe; 20. Chamber exhaust three-way valve pipe; 21. Branch pipe head; 22. Return liquid branch valve pipe; 23. Caster; 24. Compression discharge pipe; 25. Branch high-pressure valve pipe; 26. Pressure relief valve; 27. Recovery liquid pipe; 28. Return air valve pipe; 29. Return sewage valve pipe; 30. Three-way valve one; 32. Three-way valve two; 34. Protection plate. Detailed implementation manners

[0017] The present invention will be further described below with reference to the drawings: As Figures 1 - 5 shown, the multi-functional test chamber for product environmental reliability testing includes a frame 1 and a test chamber 2 installed on the frame 1. The test chamber 2 is fixed on the top of the frame 1, and a camera and sensor integration module 11 is installed in the test chamber 2. The camera and sensor integration module 11 is used to obtain information such as graphics, temperature, humidity, and pressure.

[0018] In one embodiment, a compressor 5, a fresh water tank 6, a brine tank 7, a condenser 8, a sewage tank 9, and an air pump 10 are installed in the frame 1. The intake port of the compressor 5 is connected to the test chamber 2 through a chamber exhaust three-way valve pipe 20. A compression discharge pipe 24 is installed at the exhaust port of the compressor 5. The compression discharge pipe 24 branches and is connected to two branch high-pressure valve pipes 25. The ends of the two branch high-pressure valve pipes 25 are respectively connected to the fresh water tank 6 and the brine tank 7, specifically installed on the tops of the fresh water tank 6 and the brine tank 7, for providing air pressure to the fresh water tank 6 and the brine tank 7 to press out the internal liquid.

[0019] In one embodiment, the air pump 10 is connected to the test chamber 2 through a chamber intake three-way valve pipe 17, and the condenser 8 is installed on the chamber intake three-way valve pipe 17. After it is opened, the temperature can be reduced.

[0020] In one embodiment, a fresh water inlet valve pipe 18 is installed on the fresh water tank 6. The end of the fresh water inlet valve pipe 18 extends into the test chamber 2 and is provided with a fresh water spray head 13. A brine inlet valve pipe 19 is installed on the brine tank 7. The end of the brine inlet valve pipe 19 extends into the test chamber 2 and is provided with a brine spray head 12. The brine for providing the corrosion condition is in the brine tank 7, and the salt spray environment in the test chamber 2 is ensured in the form of spraying.

[0021] In one embodiment, the bottom of the test chamber 2 is branched and connected with a recovered liquid pipe 27, a return air valve pipe 28 and a return sewage valve pipe 29 through a branch pipe head 21. Among them, the branch pipe head 21 can adopt two three-way connection methods or directly adopt a four-way. In this embodiment, two three-way connections are adopted to enable it to branch and connect three pipes. The return sewage valve pipe 29 is arranged at the bottommost part for convenient sewage discharge. The end of the return sewage valve pipe 29 is connected to the sewage tank 9. The end of the return air valve pipe 28 is connected to the air pump 10 to facilitate the circulation of hot air. Two return liquid branch valve pipes 22 are branched and connected to the recovered liquid pipe 27. The ends of the two return liquid branch valve pipes 22 are respectively connected to the fresh water tank 6 and the brine tank 7 to realize the recovery of fresh water and brine.

[0022] As Figures 1 - 5 shown, the present invention also discloses the following various more optimized specific structures: In one embodiment, the test chamber 2 is composed of a sealing cover 3 and a funnel-shaped bottom seal 4 installed at the bottom of the sealing cover 3. The sealing cover 3 is provided with a taking hole, and screw holes are provided along the edge of the taking hole to facilitate the installation of a hole cover and realize the disassembly and assembly of the hole cover. A test support frame 15 is installed in the test chamber 2, which is used to support the item to be detected and is arranged at the bottom of the sealing cover 3.

[0023] In one embodiment, a plurality of casters 23 are installed at the bottom of the cabinet frame 1. A bottom bearing plate 14 is installed on the cabinet frame 1. The bottom bearing plate 14 is used to place the compressor 5, the fresh water tank 6, the brine tank 7, the condenser 8, the sewage tank 9 and the air pump 10. A protection plate 34 is installed around the side of the cabinet frame 1. The bottom bearing plate 14 is a perforated plate.

[0024] In one embodiment, an electric heating coil is installed on the return air valve pipe 28 to facilitate ensuring the temperature in the test chamber 2. Heaters are installed in both the fresh water tank 6 and the brine tank 7 for heating the liquid.

[0025] In one embodiment, a waterproof cable joint 16 is installed on the box wall of the test chamber 2, which has good sealing performance and is used for the electrical connection inside and outside the test chamber 2.

[0026] In one embodiment, a pressure relief valve 26 is installed on the pipe body of the compression discharge pipe 24. It is mainly installed together with the compression discharge pipe 24 through a three-way to realize pressure relief.

[0027] In one embodiment, a three-way valve two 32 is installed on the pipe body of the box intake three-way valve pipe 17. Through valve cavity conversion, the three-way valve two 32 can intake air into the test box 2 or directly exhaust to the external environment. A three-way valve one 30 is installed on the pipe body of the box exhaust three-way valve pipe 20. Through valve cavity conversion, it can realize the entry of external gas into the test box 2 or into the compressor 5.

[0028] As Figures 1 - 5 shown, the multi-functional test chamber for product environmental reliability testing is mainly used to simulate the test of metal and materials being corroded by salt spray in a natural environment. The test method is as follows: S1. Connect the multi-functional test chamber for product environmental reliability testing to a computer, and place the item to be detected into the test box 2 and seal it.

[0029] S2. The tester inputs the test requirements according to the item to be detected, and the computer generates a program according to the test type.

[0030] S3. The multi-functional test chamber for product environmental reliability testing executes commands, mainly performing different actions of different components according to different test types. The actions of each moving component for different test types are as follows: For waterproof testing, gas enters through the three-way valve one 30, is pressurized by the compressor 5 after passing through the compressor 5, and the water coming out of the clean water tank 6 is sprayed as high-pressure water flow through the clean water spray head 13 and sprinkled on the test product. The excess water will collect at the bottom of the funnel-shaped bottom 4. After the spraying is completed, the compressor 5 stops working, the pressure relief valve 26 relieves the pressure of the clean water tank 6, the spraying stops, the valve body of a liquid return branch valve pipe 22 in the circulation loop opens, and the clean water flows back to the clean water tank 6 for the waterproof testing spraying in the next cycle. After the waterproof testing is completed, the test chamber will be dried and returned to the initial state.

[0031] For high and low temperature testing, the gas in the test box 2 is heated by the electric heating coil and then undergoes temperature-controlled gas circulation through the air pump 10. The environmental humidity is increased by injecting clean water. The injection of clean water here will not be elaborated further. When the test box 2 needs to be cooled, the heater stops working, and the valve cavities of the three-way valve one 30 and the three-way valve two 32 are switched, so that external gas enters the test box 2 through the three-way valve one 30 and is discharged from the three-way valve two 32 under the drive of the air pump 10. During low-temperature circulation, the condenser 8 and the fan work synchronously to input low-temperature gas and maintain low-temperature circulation.

[0032] For the dust / dust-proof test, new types of dust are added, and extremely fine particulate matter is introduced to evaluate the long-term reliability of the product in an ultra-fine dust environment. Additionally, controllable temperature and humidity conditions are added. During the test, a certain amount of talcum powder or dust is placed at the bottom of the test chamber 2. After the product is placed in the test chamber and sealed, the air pump 10 is turned on to raise the talcum powder and form a cycle in the pipeline.

[0033] Among them, for the dust-proof test, the compressor 5 is required to evacuate the test chamber 2 into a negative pressure chamber environment for the above operations. After the dust-proof test is completed, the tested product is rinsed with clean water. The rinsing principle is the same as that of the waterproof test, except that the rinsing wastewater does not enter the clean water tank for circulation but flows into the sewage tank 9. The test chamber 2 after rinsing can be dried. If subsequent waterproof tests or salt spray tests are to be carried out, the rinsing link can be omitted.

[0034] For the salt spray test, corrosion status monitoring and test feedback are introduced. The camera in the camera and sensor integration module 11 monitors the corrosion condition of the product in real time. The operating status information of the product is transmitted to the processor for analysis and compared with a standard sample. When the product is operating under load, the performance detection during operation and the analysis of the whole-process test data are carried out to obtain the changes in product performance with the change of test time and salt spray environment. During the salt spray test / experiment, the salt water tank 7 is heated and pressurized to cooperate with the salt water spray head 7 to form a spray, and the spray is evenly applied to the tested product. The cooled and liquefied salt water can flow back to the salt water tank 7 through the return pipeline or flow back to the sewage tank 9 through the circulation pipeline.

[0035] S4. The camera and sensor integration module 11 collects test data and information, and at the same time the product synchronizes its own operating status information to the processor for analysis and judgment.

[0036] S5. The processor determines the quality and protection level of the product according to the test standards and the operating status of the product and generates a test report.

[0037] The aforementioned multi-functional test chamber and test method of the present invention can not only meet the needs of equipment live testing, but also improve the automation testing ability, and can be used for multiple purposes with one machine, reducing the product cost and improving the test efficiency.

[0038] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A multi-functional test chamber for product environmental reliability testing, characterized in that: It includes a box frame and a test box installed on the box frame. A camera and a sensing integration module are installed in the test box. A compressor, a fresh water tank, a brine tank, a condenser, a sewage tank and a wind pump are installed in the box frame. The air inlet of the compressor is connected to the test box through a box exhaust three-way valve pipe. A compression discharge pipe is installed at the exhaust port of the compressor. The compression discharge pipe is branched and connected with two branched high-pressure valve pipes. The ends of the two branched high-pressure valve pipes are respectively connected to the fresh water tank and the brine tank. The wind pump is connected to the test box through a box air inlet three-way valve pipe. A condenser is installed on the box air inlet three-way valve pipe. A fresh water inlet valve pipe is installed on the fresh water tank. The end of the fresh water inlet valve pipe extends into the test box and a fresh water spray head is installed. A brine inlet valve pipe is installed on the brine tank. The end of the brine inlet valve pipe extends into the test box and a brine spray head is installed. The bottom of the test box is branched and connected with a recovery liquid pipe, a return air valve pipe and a return sewage valve pipe through a branched pipe head. The end of the return sewage valve pipe is connected to the sewage tank. The end of the return air valve pipe is connected to the wind pump. Two return liquid branch valve pipes are branched and connected to the recovery liquid pipe. The ends of the two return liquid branch valve pipes are respectively connected to the fresh water tank and the brine tank.

2. The multi-functional test chamber for product environmental reliability testing according to claim 1, wherein: The test box is composed of a sealing cover and a bucket-shaped bottom seal installed at the bottom of the sealing cover. A taking hole is provided on the sealing cover. A screw hole is provided on the edge of the taking hole. A test support frame is installed in the test box.

3. The multi-functional test chamber for product environmental reliability testing according to claim 1, characterized in that: A plurality of casters are installed at the bottom of the box frame. A bottom bearing plate is installed on the box frame. A protective plate is installed around the side of the box frame.

4. The multi-functional test chamber for product environmental reliability testing according to claim 1, characterized in that: An electric heating coil is installed on the return air valve pipe. Heaters are installed in both the fresh water tank and the brine tank.

5. The multi-functional test chamber for product environmental reliability testing according to claim 1, characterized in that: A waterproof cable connector is installed on the box wall of the test box.

6. The multi-functional test chamber for product environmental reliability testing according to claim 1, characterized in that: A pressure relief valve is installed on the pipe body of the compression discharge pipe.

7. The multifunctional test chamber for product environmental reliability testing according to claim 1, wherein: A three-way valve II is installed on the pipe body of the box air inlet three-way valve pipe. A three-way valve I is installed on the pipe body of the box exhaust three-way valve pipe.

8. A testing method for a multi-functional test chamber used for the environmental reliability test of the product according to any one of claims 1-7, characterized in that, The specific steps are as follows: S1. Connect the multifunctional test box for product environmental reliability testing to a computer. After putting the item to be detected into the test box, seal it. S2. The tester inputs the test requirements according to the item to be detected. The computer generates a program according to the test type. S3. The multifunctional test box for product environmental reliability testing executes the command, mainly performing actions of different components according to different test types. S4. The camera and the sensing integration module collect test data and information. At the same time, the product synchronizes its own operating status information to the processor for analysis and judgment. S5. The processor determines the quality and protection level of the product according to the test standards and the product operating status and generates a test report.

9. A testing method according to claim 8, characterized in that, The test types in step S3 include waterproof test, high and low temperature test, dust / dust prevention test, and salt spray test.

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