The car rain test room is used to test the water leakage and sealing of the entire car or its parts under different intensities of rain, to verify the waterproof performance of the car product and provide reference for improving the product and research and development. In real life, when driving on the road, cars may encounter situations such as rainwater impact, water splashes, etc. Therefore, when designing the structure of a car rain test room, it is necessary to simulate high-intensity rain exposure.

When designing the vehicle rain test room, it is necessary to conduct rain tests in all directions, and the intensity and angle of water spraying should be suitable and comply with national standards. Additionally, it is necessary to consider the water supply system for the car rain shelter, which should be able to operate without water shortage and recycle water for testing. The water should be filtered to remove impurities and reused. The car rain test room should ensure that the car window can be sprayed with water from the side and top of the car, and a comprehensive water spray test should be conducted. During the water spray test, the water pressure and flow rate should meet the national standard.

Functional structure and equipment of automobile rain test room

1、 Rainy area: The rainproof sealing test device for car windows should ensure that water is sprayed from the side and top directions to avoid blind spots and ensure that the water pressure and flow rate correspond to the national standard requirements for various parts of the car. The frame structure of the rain shelter ensures rust prevention and shock resistance while maintaining a simple and beautiful appearance. The entire equipment is easy to operate and facilitates the inspection and maintenance of components. This equipment mainly includes: sprinkler system, water replenishment system, water circulation system, sewage system, electrical control system, etc.

2、 Spray system: The entire rain shower room spray system is mainly composed of pipelines, nozzles, valves, filters, water pumps, display devices, etc.

2.1 Pipeline:

Supervisor: All sprinkler pipes are made of stainless steel pipes; The inner diameter of the water pump suction pipe is 150mm, the top of the water pump supply main pipe diameter is 100mm, and the main pipe diameter from the water pump outlet to the bottom of the flow meter on both sides is 100mm.

Branch pipe: Stainless steel pipe is used as the spray branch, with a diameter of 32mm.

2.2. Nozzle:

Adopting adjustable plastic nozzles. The spray state is a solid conical shape with a cone angle of 60 degrees. Spray angle, the top nozzle is perpendicular to the horizontal plane, and the nozzle design complies with national standards. The nozzle is arranged in a grid pattern, with no blank areas within the spraying area. The nozzle can be adjusted appropriately according to the spraying angle. According to the design basis, 6 spray nozzles are arranged in the rain room with a horizontal and vertical spacing of 400mm, totaling 850 spray nozzles. There are 240 spray nozzles at the top, 210 spray nozzles on the left side, 210 spray nozzles on the right side, 130 spray nozzles at the bottom, 30 spray nozzles at the front, and 30 spray nozzles at the tail

The distance between the nozzle and the corresponding exterior surface of the vehicle is 700mm on the roof, 620mm on both sides, and there is no movable nozzle.

The axis of the top nozzle is perpendicular to the horizontal plane, and the axis of the side nozzle is perpendicular to the longitudinal symmetry plane of the vehicle.

2.3. Filtering device: Install two layers of filtering devices in the water tank to effectively filter impurities in the circulating water of the circulating water tank, reduce nozzle blockage, and close the water supply pipe when the set highest liquid level is reached.