Research on the Application of UL Environment Test Equipment Water Spray Head Piping Test in Product Performance Testing

Abstract​
In the production and R&D process of electrical and electronic products, lamps, electrical cabinets, and electrical components, their operational reliability in outdoor or humid environments is of crucial importance. The LISUN JL-UL UL Environment Test Equipment Water Spray Head Piping Test is manufactured in strict accordance with a series of international authoritative standards. It can accurately simulate rainy weather conditions and conduct comprehensive tests on the physical properties and other related performances of various products. This paper will conduct an in-depth analysis of the design standards, structural composition, and technical parameters of this equipment, elaborate on its role and application process in product testing, and demonstrate its significant value in ensuring product quality and promoting the standardized development of the industry by combining actual data and diagrams. It aims to provide a reference for product design, improvement, verification, and factory inspection in relevant enterprises.​

1. Introduction​
With the rapid development of the electrical and electronic industry, product application scenarios have become increasingly complex, and the demand for their use in outdoor and humid environments has continued to rise. Against this backdrop, indicators such as product waterproof performance and structural stability have become key factors in measuring product quality and reliability. As an important environmental simulation testing tool, the UL Environment Test Equipment Water Spray Head Piping Test can truly replicate rainy weather conditions and accurately evaluate product performance in such environments. The JL-UL UL Environment Test Equipment Water Spray Head Piping Test developed and produced by LISUN Group strictly adheres to international mainstream standards. Relying on its advanced design and stable performance, it has been widely used in the industry. This paper takes this equipment as the research object and conducts an in-depth discussion on its application in the testing of electrical and electronic products, lamps, electrical cabinets, and electrical components, aiming to provide professional and comprehensive equipment application references for the industry.​

2. Design Standards and Core Functions of LISUN JL-UL UL Environment Test Equipment Water Spray Head Piping Test​
2.1 Design Standards​
The LISUN JL-UL UL Environment Test Equipment Water Spray Head Piping Test is manufactured in strict compliance with a number of international authoritative standards to ensure the accuracy and universality of test results. Specifically, this equipment meets the requirements specified in Figures 38.1 and 38.2 of the UL60507-ENGL 1999 standard, and also follows the provisions of ANSI Z21.10.3-2004, the Figure 10/Figure 11 clauses in the ANSI Z21.58 standard, and the CSA4.3-2004 standard. In addition, it can also meet a series of UL series standards, including UL1598, UL153, UL154B, UL1703, UL8750, UL1741, UL514B, UL1278, and UL1571. It can provide testing services that comply with specific standards for products of different types and application scenarios, covering multiple sub-fields of the electrical and electronic industry.​

2.2 Core Functions​
The core function of the UL Environment Test Equipment Water Spray Head Piping Test is to provide simulated rainy weather conditions for electrical and electronic products, lamps, electrical cabinets, electrical components, and other products, thereby conducting comprehensive tests on the physical properties and other related performances of the products. In practical applications, this equipment precisely controls parameters such as water spray intensity, water spray angle, and water spray duration to simulate rainfall environments of different intensities in nature, such as light rain, moderate rain, and heavy rain. During the test, staff can observe whether the product has problems such as shell deformation, seal failure, and electrical performance degradation in the rainy environment. After the test, through professional verification methods, quantitative evaluations are conducted on indicators such as the product’s waterproof level, insulation performance, and mechanical strength to determine whether the product’s performance meets the design requirements and industry standards, providing a scientific basis for product design optimization, production improvement, quality verification, and factory inspection. For example, in the testing of lamp products, by simulating an outdoor rainy environment with this equipment, it is possible to test whether the waterproof performance of the lamp shell meets the standards, preventing rainwater from entering the interior of the lamp and causing problems such as short circuits and damage, thus ensuring the safe and stable operation of the lamp in the outdoor environment.​

3. Structural Composition and Technical Parameters of LISUN JL-UL UL Environment Test Equipment Water Spray Head Piping Test​
3.1 Structural Composition​
The LISUN JL-UL UL Environment Test Equipment Water Spray Head Piping Test features a scientific and reasonable structural design, mainly consisting of the following key components. These components work together to ensure the stability and accuracy of the testing process.​

1)Main Body of the Test Equipment: The main body is composed of two parts: the UL rain test device and the water spray test device. The UL rain test device is located above and equipped with 3 UL nozzles, which are mainly used to simulate the environment where the product is exposed to rain in the vertical direction. The water spray test device is located below and equipped with 1 UL nozzle, which can simulate the scenario where water is sprayed on the product from below, realizing a comprehensive rain test on the product and avoiding detection loopholes caused by a single test angle.​

2)Rack and Nozzle Frame: The rack is made of formed aluminum material. This material not only has good structural stability to support the stable operation of various parts of the equipment, but also has the characteristic of being easy to clean, which is convenient for the daily maintenance of the equipment and reduces the interference of dust, impurities, and other substances on the test results. The nozzle frame is designed with a movable structure, and staff can freely adjust the height of the nozzle frame through a hand-cranked stainless steel wheel device. This allows flexible adjustment of the nozzle position according to the height and size of the test product, ensuring that the distance between the nozzle and the product meets the standard requirements and improving the accuracy of the test.​

3)Nozzle and Piping System: The equipment adopts original imported nozzles from UL laboratories, which fully meet the requirements of relevant standards such as UL60507-ENGL 1999, UL484-34, ANSI Z21.10.3-2004, ANSI Z21.58, ANSL B94.11M, and CSA4.3-2004. The matching piping system is made of corrosion-resistant stainless steel, which has good pressure-bearing capacity and durability, ensuring the stable transportation of water flow and avoiding water leakage or pressure loss during the test. The combination of high-quality nozzles and piping ensures the uniformity and stability of water spray, making the water spray intensity and water spray mode consistent in each test, and avoiding test errors caused by equipment component quality problems.​

4)Mobile and Fixed Device: The base of the bracket is equipped with universal casters with brakes. This design enables the equipment to have good mobility, allowing staff to easily move the equipment position according to the laboratory layout and test requirements. At the same time, the brake function can fix the equipment after it reaches the designated test position, preventing the equipment from moving during the test and affecting the test accuracy, thus taking into account the flexibility and stability of the equipment.​

5)Pressure Monitoring System: The equipment uses “Hongqi” brand stainless steel pressure gauges (a domestic brand), and each nozzle is equipped with a corresponding pressure gauge. The pressure gauges can monitor the water spray pressure of each nozzle in real time. Staff can adjust the nozzle pressure through the control valve according to the test standard requirements to ensure that the water spray pressure meets the test specifications. At the same time, it is convenient to detect abnormal pressure conditions in a timely manner, ensuring the smooth progress of the test.​

3.2 Technical Parameters​
The technical parameters of the LISUN JL-UL UL Environment Test Equipment Water Spray Head Piping Test are designed in strict accordance with relevant standards. The following are the dimensional parameters of the key parts of the equipment, which directly affect the layout of the nozzles, the flow of the piping system, and the water spray effect, thereby determining the accuracy of the test (the data is derived from the standard design drawings of the equipment, as shown in Table 1).​
Table 1 Dimensional Parameters of Key Parts of LISUN JL-UL UL Environment Test Equipment Water Spray Head Piping Test

Item	Millimeter (mm)	Inch
A (Distance between upper nozzles and test platform)	710	28
B (Overall height of the equipment main body)	1400	55
C (Inner diameter of the water supply piping)	55	2002/1/4
D (Distance between lower nozzle and test platform)	230	9
E (Length of the nozzle connecting pipe)	75	3

In addition to the above dimensional parameters, the equipment also has the following core technical parameters: it can be used for UL rain tests and 45° water spray tests of products to meet the needs of different test angles; the water spray pressure can be adjusted in the range of 50kPa-200kPa according to the test standards, and is monitored in real time through pressure gauges to ensure that the pressure is stable within the standard range; the water flow rate of the piping system is 10L/min-50L/min, which can be adjusted according to the number of nozzles used; the operation time of the equipment can be accurately set within 0-999 minutes, and staff can set the duration of the rain test according to the test requirements to realize an automated test process and reduce human operation errors.​

4. Application Process and Practical Case of LISUN JL-UL UL Environment Test Equipment Water Spray Head Piping Test​
4.1 Application Process​
The application process of the LISUN JL-UL UL Environment Test Equipment Water Spray Head Piping Test in product testing is standardized and orderly, mainly including the following steps to ensure the scientificity and rigor of the test process.​
• Pre-test Preparation: First, according to the type, specification, and relevant standard requirements of the test product, staff need to determine the test plan and clarify the test parameters, such as water spray intensity, water spray angle, test duration, and water flow rate of the piping system. Second, preprocess the test product: check whether the appearance of the product is intact, confirm that the product is in a normal working state, and fix the product in the test area of the equipment in accordance with the standard requirements to ensure that the product does not move during the test. Finally, check the status of the equipment: inspect the nozzle for blockages, confirm the tightness of the piping system (no water leakage), check whether the pressure gauges and control valves are working normally, and ensure that all performance indicators of the equipment meet the test requirements.​

• Equipment Debugging: Adjust the equipment parameters according to the determined test plan. Adjust the height of the nozzle frame through the hand-cranked stainless steel wheel device to make the distance between the nozzles and the product meet the standard specifications (e.g., adjust to parameter A or D in Table 1 according to the test type). Open the main water supply valve, adjust the control valve of each nozzle, observe the pressure value through the pressure gauge, adjust it to the range required by the test standard (e.g., 80kPa for heavy rain simulation), and maintain stable pressure. At the same time, check the water flow of the piping system and the uniformity of the nozzle spray to ensure that there is no abnormality in the water spray from the nozzles and no pressure loss in the piping.​

• Formal Test: After the equipment is debugged, start the test program, and the equipment will simulate the rainy environment according to the set parameters. During the test, staff need to closely observe the status of the product and the operation of the equipment: record whether the product has problems such as shell water seepage, deformation, and electrical failure; monitor the pressure gauge reading and the water flow of the piping system in real time to ensure that the equipment operates stably. They can use auxiliary equipment such as cameras and sensors to monitor the performance changes of the product in real time and obtain detailed test data.​

• Post-test Processing and Verification: After the test is completed, first close the main water supply valve and drain the remaining water in the piping system to avoid corrosion of the piping. Then take out the test product and dry the product (select an appropriate drying method according to the product characteristics, such as natural air drying or low-temperature drying). Subsequently, verify the performance of the product in accordance with relevant standards, including waterproof performance testing (such as judging the product’s waterproof level through water immersion tests and air tightness tests), electrical performance testing (such as measuring the insulation resistance, grounding resistance, and electrical strength of the product), and mechanical performance testing (such as checking the mechanical strength of the product shell and the connection stability of parts). Based on the verification results, determine whether the product performance meets the requirements and issue a test report.​

• Equipment Maintenance and Recording: After the test, conduct comprehensive maintenance of the equipment: clean the impurities in the nozzles and piping to prevent blockage; wipe the surface of the equipment and the inner wall of the test area; check whether there is damage to the piping joints, nozzles, and pressure gauges, and replace damaged parts in a timely manner; make detailed equipment maintenance records. At the same time, organize the test data and reports, file the test results, and provide a basis for the subsequent design, production, and quality traceability of the product.​

4.2 Practical Case​
Taking the testing of an outdoor electrical cabinet product produced by an electrical and electronic enterprise as an example, the enterprise needs to conduct a rain test on the electrical cabinet in accordance with the UL154B standard to determine whether it meets the waterproof requirements for outdoor use. At this time, it is necessary to use the LISUN JL-UL UL Environment Test Equipment Water Spray Head Piping Test to carry out the test.​

In the pre-test preparation stage, in accordance with the requirements of the UL154B standard, the staff determined the test parameters: the water spray pressure was set to 80kPa, the test duration was 30 minutes, the water flow rate of the piping system was adjusted to 30L/min, and the 3 upper nozzles and 1 lower nozzle were used to spray water simultaneously to simulate the outdoor heavy rain environment. The outdoor electrical cabinet to be tested (size: 800mm×600mm×400mm) was fixed in the test area of the equipment, ensuring that key parts such as the cabinet door and cable interfaces were facing the nozzles and could be fully exposed to rainwater. After checking that the nozzles were not blocked, the piping system was leak-free, and the pressure gauges displayed normally, the process proceeded to the equipment debugging stage.​

The height of the upper nozzle frame was adjusted to 710mm (parameter A in Table 1) through the hand-cranked stainless steel wheel, and the distance between the lower nozzle and the electrical cabinet was adjusted to 230mm (parameter D in Table 1). The main water supply valve was opened, and the control valve of each nozzle was adjusted. Through the observation of the pressure gauge, it was ensured that the pressure of each nozzle was stably maintained at 80kPa, and the water flow rate of the piping system was confirmed to be 30L/min. After the debugging was completed, the test program was started, and the equipment began to simulate the rainy environment.​

During the 30-minute test, the staff observed the status of the electrical cabinet in real time through the observation window of the equipment and found that there was no obvious water seepage at the seal of the electrical cabinet door and the cable interface, and no deformation on the surface of the electrical cabinet. At the same time, the pressure gauge reading remained stable at 80kPa, and there was no water leakage in the piping system. After the test was completed, the main water supply valve was closed to drain the piping, and the electrical cabinet was taken out and naturally dried for 24 hours.​

Subsequently, the performance of the electrical cabinet was verified: the insulation resistance of the electrical cabinet was measured using an insulation resistance tester, and the result was 500MΩ, which met the requirement in the UL154B standard that the insulation resistance should not be less than 100MΩ; the grounding resistance was measured using a grounding resistance tester, and the value was 0.5Ω, which met the standard requirement that the grounding resistance should not be greater than 1Ω; the electrical cabinet was powered on for 2 hours, and its internal electrical components (such as contactors and relays) operated normally without short circuits or failures.​

Based on the test and verification results, the outdoor electrical cabinet product passed the UL Environment Test Equipment Water Spray Head Piping Test, and its performance met the requirements of the UL154B standard, making it suitable for outdoor use. The enterprise confirmed that the product quality met the standards based on the test results, arranged for the product to leave the factory, and at the same time used the test data as a basis for product quality traceability to provide a reference for the subsequent production improvement of the product.

5. Industrial Value and Development Trend of UL Water Spray Test Device
5.1 Industrial Value
• Ensuring Product Quality and Safety: The UL Water Spray Test Device can simulate the rainy environment that products may encounter in actual use. Through strict testing and verification, it can timely detect defects in the product’s waterproof performance, structural stability, electrical performance, and other aspects. This helps enterprises eliminate quality hazards before the products leave the factory, avoids safety accidents caused by product quality problems, and ensures the safety of consumers in use. For example, in the testing of electrical components, problems such as poor sealing of components can be detected through this device, preventing short circuits of components in humid environments and avoiding safety accidents such as fires.

• Promoting the Standardized Development of the Industry: The device is manufactured in accordance with internationally accepted standards such as UL, ANSI, and CSA, and its testing methods and results are universal and authoritative. By using this device for testing, enterprises can make their product performance meet international standard requirements, facilitating the products to enter the international market and promoting the development of international trade. At the same time, the wide application of the device also promotes the unification of product testing standards in the industry, guiding enterprises to carry out product R&D and production in accordance with standardized processes and improving the product quality level of the entire industry.

• Reducing Enterprise Costs and Risks: In the product R&D stage, by testing samples with the UL Water Spray Test Device, problems in product design can be found in advance and improved in a timely manner. This avoids large-scale recalls caused by design defects after mass production of products, reducing the production costs and economic losses of enterprises. In addition, the product performance data obtained through testing can help enterprises optimize the production process, improve production efficiency, and enhance the market competitiveness of enterprises.

5.2 Development Trend
With the continuous advancement of science and technology and the increasing diversification of industry demands, the UL Water Spray Test Device also shows the following development trends:
• Intelligent Upgrading: In the future, the device will become more intelligent. By introducing technologies such as the Internet of Things (IoT) and artificial intelligence (AI), it will realize automated control, remote monitoring, and data analysis of the device. For example, the device can collect test data in real time through sensors and upload it to a cloud platform. Staff can remotely view the test progress and data through terminals such as mobile phones and computers. AI algorithms can analyze the test data, automatically determine whether the product performance meets the standards, and generate test reports, reducing human operation errors and improving test efficiency.

• Multi-functional Integration: To meet the needs of enterprises for multi-dimensional performance testing of products, the device will develop towards multi-functional integration. In addition to simulating rainy environments, it can also integrate functions of simulating other environmental conditions such as high temperature, low temperature, humidity, and sand and dust, realizing comprehensive environmental tests on products. This reduces the investment of enterprises in multiple devices and saves laboratory space and costs.

• Energy-saving and Environmental Protection Design: Against the background of global advocacy for energy conservation and environmental protection, the device will pay more attention to energy-saving and environmental protection performance. For example, it will use energy-saving water pumps, motors, and other components to reduce the energy consumption of the device; optimize the water circulation system to realize the recycling of water resources and reduce water waste; select environmentally friendly materials to make device components, reducing the environmental pollution caused by the device.

6. Conclusion
As an important tool for product testing in the electrical and electronic industry, the LISUN JL-UL UL Water Spray Test Device is manufactured in accordance with a number of international authoritative standards and has the functions of accurately simulating rainy weather conditions and comprehensively testing product performance. Its scientific and reasonable structural design and stable and reliable technical parameters ensure the accuracy and universality of test results. Through a standardized application process, the device can provide strong support for the design, improvement, verification, and factory inspection of electrical and electronic products, lamps, electrical cabinets, electrical components, and other products. It plays an important role in ensuring product quality and safety, promoting the standardized development of the industry, and reducing enterprise costs and risks.

With the continuous development of the industry, the UL Water Spray Test Device will move towards intelligence, multi-functional integration, and energy-saving and environmental protection, providing stronger technical support for the high-quality development of the electrical and electronic industry. Enterprises should fully recognize the importance of this device, rationally use it to carry out product testing work, continuously improve product quality, enhance market competitiveness, and achieve sustainable development of enterprises.

Tags：JL-UL