In today's export trade of home appliances, household hair dryers, as a daily necessity, are in great demand in the market. However, quality standards vary from country to country and region to region, and product defects can lead to serious safety incidents or huge claims. As a professionalthird party inspectionCompany, we have summarized a set of systematic householdHair Dryer InspectionProcesses to help buyers effectively control product quality and reduce trade risks.Risk.
One,inspection of goodspreparatory work
1. Knowledge of product standards:Familiarize yourself with the electrical safety standards of the target market (e.g., EN60335 in the EU, UL859 in the U.S., etc.) and confirm whether the product has obtained the appropriate certification.
2. Collation of technical documents:Check the completeness of technical documents such as product specifications, circuit diagrams, BOM lists, etc. Pay special attention to key parameters such as rated voltage and power.
3. Preparation of inspection tools:This includes specialized equipment such as calipers, multimeters, infrared thermometers, anemometers, leakage testers, and standard test voltage sources.
II. Appearance check
1. Packaging inspection:
Check whether the material and thickness of the outer box meet the requirements; check whether the marking information and warning signs are accurate and complete; verify the bar code and two-dimensional code can be scanned; check the protection of the inner packaging (color box, blister, etc.).
2. Product appearance inspection:
The surface is free of injection molding defects such as scratches, shrinkage and burrs; plating/painting parts are free of peeling, bubbles and color difference; switches and buttons feel good and are free of jamming; power cord specifications meet the requirements.
3. Structural safety inspections:
The air inlet is well-designed to prevent hair from getting involved; the internal wiring is neat and the key parts are protected by insulation; the heating element is kept at a safe distance from the plastic parts.
III. Safety performance tests
1. Electrical safety tests:
Voltage withstand test: 1500V/3mA keep 1 second without breakdown; Insulation resistance test: ≥2MΩ (500V DC); Leakage current test: ≤0.25mA (for Class II appliances).
2. Mechanical safety tests:
Power cord tension test: apply 30N force 25 times, displacement ≤ 2mm; stability test: the product tilted 10 ° should not be tilted; strength test of the protective net: with a diameter of 6mm steel ball to apply 30N force does not fall off.
3. Verification of overheating protection:
Simulate the blockage of air ducts to verify that the thermostat can cut off the circuit in time; check that the plastic parts are not deformed or melted after the test.
IV. Functional performance testing
1. Basic functional tests:
The function of each gear switch is normal; there is a significant difference in the adjustment of wind speed (usually high speed gear wind speed ≥ 10m / s); the temperature adjustment is accurate, cold wind gear should be no heating.
2. Noise tests:
Measured at 1 meter away from the product in the silencing room; the noise of ordinary blowers should be ≤75dB(A).
3. Wind speed and wind temperature tests:
Use anemometer to measure the air velocity at the air outlet; infrared thermometer to measure the air temperature (usually high temperature ≤ 60 ℃); verify the stability of the thermostat function.
V. Common quality defects of hairdryers
1. Electrical safety issues
- Excessive leakage current: Leakage current > 5mA in high voltage test may be due to poor insulation material or poor assembly.
- Grounding failure: Grounding resistance > 0.1 ohm, possibly due to a loose ground wire.
- Failed overheat protection: The thermal fuse was not disconnected during the dry burn test, which could have caused a fire.
2. Functional deficiencies
- Insufficient wind speed: The wind speed is lower than the nominal value, which may be due to insufficient power of the motor or defective design of the air duct.
- Temperature deviation: hot air temperature >70℃ or cold air switching failure, affecting the use experience.
- Switch malfunction: Control buttons or sliders are unresponsive, possibly due to poor contact.
3. User security issues
- Air outlet overheating: Air outlet temperature > 120°C, which may lead to burns.
- Excessive gap in the protection screen: air inlet gap > 12mm may cause hair or foreign objects to be caught.
- Uncomfortable handle: The handle design is not ergonomic and is easy to fatigue when used for a long time.
4. Appearance and workmanship issues
- Surface defects: scratches, stains or color differences in the housing, nozzle or handle, affecting aesthetics.
- Loose assembly: the air nozzle or switch is loose, affecting the use experience.
- Labeling irregularities: Missing or incorrect labeling information may lead to customs clearance failure.
5. Packaging issues
- Package breakage: The package breaks during the drop test, resulting in damage to the casing or motor.
- Labeling errors: package labels lack certification marks or Chinese descriptions, affecting compliance.
VI. Elements of the inspection report
A professional inspection report should be included:
1. Basic product information
2. Sampling program and classification of defects
3. Detailed test data records
4. Photographs and descriptions of defects
5. Overall conclusions and recommendations for improvement
As a professional third-party inspection organization, we suggest our buyers to carry out strict pre-production inspection (PPI) before mass production of new products, carry out mid-term inspection (DUPRO) in the production of large quantities of goods, and complete the final random inspection (FRI) before shipment, so as to form a complete quality control chain. Through systematicgoods inspection processIt can effectively reduce the quality risk of hair dryer products and protect the interests of both buyers and sellers. For more informationhome appliance inspectionProfessional services, welcome to contactInspection OnlineThe
Chinese 
English 
Japanese 
Korean 
Indonesian 
German