The disinfection cabinet control board works long-term in a closed kitchen environment with high humidity, temperature fluctuation, ozone corrosion and electromagnetic interference. Its service life and stability directly affect the whole machine’s safety and user experience. Aging test and reliability verification are essential production processes to screen defective products, verify component stability, and confirm circuit and software long-term operation performance. This paper systematically introduces the standard aging test procedure and full-item reliability verification process of disinfection cabinet control boards.

1. Purpose of Aging and Reliability Verification

Eliminate early failure caused by poor components, welding defects and design hidden troubles.

Verify long-term stability under high temperature, high humidity and continuous working conditions.

Inspect functional logic, timing accuracy, temperature control and protection linkage performance.

Ensure mass production consistency and meet household appliance life standard requirements.

2. Pre-test Preparation

Sample Selection

Randomly sample finished control boards from mass production, including normal version and high-power compatible version.

Peripheral Simulation Loads

Simulate UV lamp, ozone generator, heating drying tube, door switch, NTC temperature sensor and key display module to restore real working conditions.

Test Environment Setup

Place samples in constant temperature and humidity aging chamber, with adjustable temperature, humidity and simulated grid voltage fluctuation.

Initial Function Inspection

Check touch keys, display, timing, disinfection mode, heating output and fault alarm function before aging to confirm no initial abnormality.

3. Standard Aging Test Process

3.1 Power-on Continuous Aging

Supply rated AC 220V power, set the control board to cycle operation mode: disinfection → drying → standby → automatic restart. Keep continuous power-on aging for 24–72 hours according to enterprise standard.

3.2 High Temperature Aging

Set ambient temperature at 55℃～65℃, continuous power-on running. Examine whether components such as relay, MCU, electrolytic capacitor and power chip have overheating, drift or failure.

3.3 High Humidity Aging

Adjust humidity to 85%～95% RH without condensation, simulate kitchen steam and humid environment. Verify the control board’s moisture resistance, insulation performance and anti-creeping risk.

3.4 Voltage Fluctuation Aging

Simulate grid overvoltage and undervoltage (AC 180V～250V) cyclic switching, test power circuit stability, avoid crash, reset and malfunction caused by voltage fluctuation.

3.5 Functional Cycle Aging

Automatically cycle touch key triggering, mode switching, timing adjustment and door opening/closing interlock to verify software logic stability and anti-misoperation ability.

4. Full-item Reliability Verification Items

4.1 Temperature and Humidity Cycle Test

Alternate high and low temperature with humidity change, evaluate PCB resistance to thermal expansion and cold contraction, check for solder joint cracking and component failure.

4.2 Ozone Corrosion Resistance Test

Place the control board in micro ozone atmosphere for a certain period, inspect metal pins, circuit traces and electrolytic components for corrosion and performance attenuation.

4.3 EMC Anti-interference Test

Conduct electrostatic discharge, surge interference and radiation interference test to verify the control board’s ability to resist kitchen appliance electromagnetic noise.

4.4 Mechanical Vibration and Drop Test

Simulate transportation vibration and accidental drop, check structural firmness, solder joint integrity and plug-in contact reliability.

4.5 Life Endurance Test

Long-term repeated switching of relay load, simulate years of on-off action, confirm no contact adhesion, ablation and failure.

4.6 Safety Performance Detection

Inspect insulation resistance, withstand voltage and leakage current to meet household appliance safety standards, prevent electric leakage and electric shock risk.

5. Judgment Standard of Qualified Products

After aging and reliability test, the control board must meet all the following criteria:

No crash, no reset, no program disorder during the whole aging process.

Touch response is normal; display brightness is uniform; no missing segment or flicker.

Temperature detection, timing function and disinfection control are accurate without deviation.

Relay, heating and ozone output act normally without stagnation or mis-action.

No component overheating, bulging, leakage, corrosion or solder joint falling off.

Withstand voltage, insulation and leakage indicators comply with national safety regulations.