rain Spray Simulation Environmental Chamber

SPECIFICATION

I. Equipment Core Functions

Raindrop Simulation

Accurately control raindrop size (0.5-5mm), rainfall intensity (0-100mm/h), raindrop falling speed (1-10m/s).

Support vertical rainfall, inclined rainfall mode, simulate different weather scenarios (such as drizzle, rainstorm, typhoon rainfall).

Spray Simulation

Generate micron-level water mist (10-100μm) to simulate high humidity environments (e.g. sea mist, morning dew, condensation).

Adjustable spray density (0.1-5L/m3-h) for uniform coverage.

Environmental coupling control

Temperature and humidity adjustment: temperature range -40℃~+80℃, humidity 10%~98%RH (optional fast temperature change function).

Wind speed simulation: 0-30m/s adjustable, simulating the effect of natural wind or high-speed airflow on raindrop trajectory.

Multi-mode combination test

Support raindrops + spray + temperature and humidity + wind speed of the composite environment test (such as hot and humid rainstorms, low temperature freezing rain).

Technical parameters and design

Module Technical parameters

Raindrop system - Nozzle type: ultrasonic atomizing nozzle (fine rain), high-pressure jet nozzle (heavy rain).

- Rainfall Calibration: Laser raindrop spectrometer to monitor raindrop distribution in real time.

Spray System - Atomization: Ultrasonic/compressed air atomization.

- Particle size distribution: Calibrated by Malvern particle size meter (D50 ≤ 50μm).

Temperature and Humidity Control - Cooling/Heating: Dual Compressor Compound Cooling + Electric Heating.

- Humidity control: steam humidification + dehumidifying rotor.

Wind speed simulation - variable frequency fan + infusion device, wind speed uniformity error ≤ ± 10%.

Control system - touch screen + PLC programming, preset ISO/IEC standard test program (e.g. ISO 20653, MIL-STD-810).

- Data recording: real-time storage of temperature, humidity, rainfall and wind speed curves.

III. Application Scenarios

Industry Test Scenarios

Automobile - Body sealing test (heavy rain + high speed driving).

- Lights, camera performance verification in freezing rain environment.

Aerospace - Reliability of airborne equipment under wet and icy conditions.

- Radar cover rain erosion resistance testing (high speed raindrop impact).

Consumer Electronics - Waterproofing of cell phones, watches in tropical rainforest environments (high temperature, high humidity + constant rainfall).

Outdoor equipment - Solar panels, communication base station equipment in typhoon weather protection.

Equipment design highlights

1. Accurate environmental simulation

Raindrop Dynamics Control: Adjust the raindrop particle size and speed through high-pressure pumps and nozzle arrays to match the real weather data (e.g. Marshall-Palmer raindrop distribution model).

Spray uniformity: Multi-stage deflector ensures uniform droplet coverage of the test area (uniformity ≥90%).

2. Intelligent control

Scenario Programming: Customize the combination of “rain - fog - temperature - wind” timing (e.g. spray first to simulate morning dew, then rainfall to simulate rainstorms).

Failure self-test: automatic alarms for water shortage, over-temperature, fan abnormalities, etc., and record failure logs.

3. Energy saving and reliability

Water circulation system: three-stage filtration (precipitation + activated carbon + reverse osmosis), recycling rate ≥ 85%.

Anti-icing design: the inner wall of the box is heated during low-temperature testing to prevent raindrops from icing and blocking the nozzle.

V. Selection Recommendations

Demand level Recommended configuration

Basic type - raindrop + spray function, temperature and humidity range of 0 ~ 60 ℃, the budget of 50-80 million yuan (domestic).

High-end type - full environmental coupling (rain / fog / temperature / wind), temperature -40 ~ 80 ℃, in line with the MIL-STD-810 standard, the budget of 1.5-3 million yuan (imported brands).

Customized Lab - Extra-large test chamber (5m×5m×3m), supporting whole vehicle/large equipment testing, budget above 5 million RMB (e.g. Weiss Technik, Angelantoni).

Sixth, the operation process example

Case: automobile body sealing test

Parameter setting:

Rainfall intensity: 50mm/h (heavy rain), temperature 25℃, humidity 90%, wind speed 20m/s (simulated high speed driving).

Sample Installation:

The whole car or body parts are placed in the test bin, and the doors and windows are closed.

Test Execution:

The composite environment simulation was initiated and the test continued for 6 hours.

Results Analysis:

Check for water seepage in the vehicle and evaluate moisture changes in the carpet and wiring harness connectors.

VII. Maintenance and Calibration

Daily Maintenance:

Clean nozzles and filters weekly and check humidity sensor accuracy monthly.

Replace compressed air filter element (misting system) periodically.

Annual calibration:

Raindrop particle size: Laser particle size analyzer calibration (in accordance with GB/T 17626.11).

Temperature and humidity: calibrated by a third party metrology organization (ISO 17025 standard).